Modular personal network systems and methods

CROSS REFERENCE TO RELATED APPLICATION

0001This application claims the benefit of United States Provisional Patent Application No. <patcit id="pcit0001" dnum="US60270400B"><text>60/270,400, filed February 20, 2001</text></patcit>, which is hereby referenced herein in its entirety

FIELD OF INVENTION

0002Our invention relates to modular personal network systems and methods. In particular this invention relates to wireless networks of individual components that can be easily added to or removed from the network to change its functions, and in which the individual components are worn, carried, or used on or about the person of the user.

BACKGROUND OF THE INVENTION

0003A number of individual portable personal devices are available today. Such personal devices provide specific functions to a person, in a number of different fields of use. For example, there are mobile phones, personal digital assistants, medical monitoring devices, personal entertainment systems, and athletic monitoring systems. These and other portable electronic devices have significantly improved the convenience of many activities.

0004However, each of these functions is provided individually. None of these individual devices can combine with any of the other devices to provide improved functions. If a user wishes to upgrade the capabilities of any of these devices, a new, expensive device must be purchased and the old device discarded.

0005What is needed is a system in which individual portable device modules can be combined in a multitude of ways to provide an infinite variety of functions. A portable system is needed in which new functions can be added by simply adding or replacing a single component. A portable system is needed in which the functions can be modified simply by downloading new software or other parameters. A system is needed in which functions in different fields of use can be easily combined. And a system is needed in which the economies of scale and scope of building devices across multiple fields of use can be used to benefit users of devices in all of the fields of use.

0006Wireless communication protocols have been defined. Bluetooth and IEEE 802.15 are two examples of protocols that may be used with personal portable devices. What is needed is a system that provides the advantages of a modular personal network, and that uses a standard wireless communication protocol such as one of these.

0007<patcit id="pcit0002" dnum="US6047301A"><text>U.S. Patent No. 6,047,301 (2000</text></patcit>) and <patcit id="pcit0003" dnum="US6336126B"><text>U.S. Patent No. 6,336,126 (2002) both to Bjorklund, et al.</text></patcit>, disclose a wearable computer that communicates with a display device using an optical link, and with a local area network using a radio communications link. However, the system described is not modular, nor is it extensible.

0008<patcit id="pcit0004" dnum="US6324053B"><text>U.S. Patent No. 6,324,053 (2001) to Kamijo </text></patcit>discloses a wearable data processing system. However, this system depends on a network of wiring stitched into the clothing of the user.

0009<patcit id="pcit0005" dnum="US6108197A"><text>U.S. Patent No. 6,108,197 (2000) to Janik</text></patcit> discloses a flexible wearable computer. However, this disclosure does not envision the needed extensibility.

0010<patcit id="pcit0006" dnum="US5781913A"><text>U.S. Patent No. 5,781,913 (1998) to Felsenstein, et al.</text></patcit>, discloses a wearable hypermedium system. It is designed to allow a user to access a large amount of electronic information using a hands-free system, but does not include provisions for extending to other unanticipated uses.

0011A personal area network has been disclosed. For example, <patcit id="pcit0007" dnum="US6331972B"><text>U.S. Patent No. 6,331,972 (2001) to Harris, et al.</text></patcit>, discloses a circuit and method for personalizing an electronic device through a personal area network. <patcit id="pcit0008" dnum="US6314091B"><text>U.S. Patent No. 6,314,091 (2001) to LaRowe, Jr., et al.</text></patcit>, discloses a wireless personal area network with a plurality of peripheral devices, wherein a hub device provides attachment and detachment of peripheral devices. <patcit id="pcit0009" dnum="US6128290A"><text>U.S. Patent No. 6,128,290 (2000) to Carvey</text></patcit> discloses a personal data network that uses low duty cycle pulsed radio frequency energy to communicate and provide synchronization. <patcit id="pcit0010" dnum="US5909183A"><text>U.S. Patent No. 5,909,183 (1999) to Borgstahl, et al.</text></patcit>, discloses a method for programming an appliance by a controller in a personal area network. <patcit id="pcit0011" dnum="US5898831A"><text>U.S. Patent No. 5,898,831 (1999) to Hall, et al.</text></patcit>, discloses a method for including an appliance in a personal area network and programming security criteria. However, none of these systems provides the needed flexibility of our modular personal network (MPN). For example, each of them requires a controller to be one of the devices in the personal area network. These systems do not anticipate the needed methods for downloading data to a personal area network from a personal computer or other system, nor for retrieving data from a personal area network to a personal computer or other system. And the wide variety of components, configurations, and uses has not been anticipated.

0012<patcit id="pcit0012" dnum="US6050924A"><text>US 6 050 924</text></patcit> discloses an exercise system including down loadable software and retrievable exercise data.

0013Users need more flexibility in display devices, such as how they are worn so that they may be easily viewed during different activities. Users need display devices that can be easily modified in their position and orientation. Users need a variety of mounting options for individual components in an MPN. Users need an audio device that can be easily worn during various activities, that can be heard during activities with ambient noise, and that won't disturb other nearby people. Users need a system that provides multiple types of audio output in an intelligent fashion. Users need a variety of input devices for different types of activities, and which can be easily accessed during those activities.

0014Users need to be able to reuse the same components for multiple purposes. These purposes may include time keeping. Users need a network that allows communication with other individuals, who may or may not have their own MPNs. Users need a network that provides entertainment features, including playing music, playing games, and capturing audio and video. Users need a portable system that combines personal organization functions with other functions. Users need a mobile journal system that can be customized for different types of uses, such as travel, athletics, healthcare, or other purposes. Users need a system that provides guidance features, and combines them with other features, such as audio and video annotations, collection of personal data, and athletic workouts.

0015Users need a system that can provide a variety of athletic functions, such as downloading workout control parameters as well as uploading results of a workout. Users need a system that can interface with exercise equipment, bicycles, and other personal equipment. They need a system that collects performance data, detects and corrects errors in the collected data, and estimates secondary data, based on the collected primary data. Athletes need a mobile system to measure cadence and stride length. Some athletes need reminders to consume water, sodium, and food. Swimmers need a system to measure and log lap-swimming workouts. Runners and other athletes need a mobile system to provide form feedback. Athletes need a system that can work with another system to provide a competition between multiple athletes.

0016Physical therapist, doctors, and other healthcare professionals need a system that can provide a variety of functions, such as measuring user capabilities, monitoring changes, keeping a medical journal, measuring metabolic parameters, detecting medical problems, providing treatments, and providing medical databases. A system is needed that allows components to be ingested, injected, or implanted, as well as worn, carried, or mounted on personal equipment. A system is needed that provides alternate input, output, and mounting for a disabled user.

0017Travelers and outdoor users need a system that provides a variety of integrated features. For example, a system is needed that combines translation, travel information repository, wildlife recognition, weather, route guidance, local entertainment, and orienteering functions. A system is needed that can provide user identification functions and that can use that identification to provide other services, such as transfer of money and product purchasing and discounts. Users need a system that can provide personal security features, such as audible alerts, transmitted alerts, and storing emergency information. A system is also needed that can support military needs.

SUMMARY

0018Our invention satisfies these and other needs by providing a modular personal network (MPN). A main aspect of our invention is a system that allows multiple individual network components (INCs), each with one or more primary functions, to be used in a wireless personal network, and that INCs may be added and removed modularly to add or remove functions of the MPN. This includes the ability to add INCs that were not anticipated when the MPN was first assembled. INCs are personal, in that they may be worn, carried, mounted on personal equipment, or otherwise used in proximity to the person associated with the MPN. Another aspect of our invention is that it supports INCs from different manufacturers, of different models, of different types, and with different capabilities. Another aspect is the ability to download software, data, settings, and other information into an INC to control functions of the MPN, and to upload data from an INC. Yet another aspect of our invention is the use of a common network identifier among the INCs of the MPN, to prevent interference between INCs that may be part of different MPNs, and to prevent the unauthorized use of an INC. Still another aspect of our invention is a single turn on or turn off command to turn on or off all INCs in an MPN.

0019Another aspects of our invention is a control unit, which may be an INC containing a processor and memory for controlling other INCs in the MPN. Alternatively, there may be no control unit, and each INC may provide its own control. A base station or personal computer may interact with the MPN, to download software, data, and settings, and to upload data that may have been collected by the MPN. The MPN may interact with a wide area network, such as the Internet, using the base station or personal computer in another aspect.

0020Another aspect of our invention is that one of the INCs may function as a display device. A display INC may be mounted on the back of the wrist in a manner similar to a wristwatch, it may be worn on the side of the wrist or hand, or it may be worn in any other suitable location. The orientation of the display may be changed to suit the needs of the user. In another aspect of our invention, the display INC or other INCs may be worn using a reconfigurable mount that allows easy repositioning and replacement of the INC.

0021Another aspect of our invention is that one of the INCs may function as an audio output device, which may provide audio cues, voice, music or other types of audio information. The audio output INC may include headphones, ear inserts, or speakers that mount in a hat or headband. If multiple types of audio output are supported, one audio signal may be paused or muted while the other is generated.

0022Another aspect of our invention is that one of the INCs may function as a user input device, and may include a device such as a button or pressure sensor, a touch pad and stylus, or a voice input. Pressure sensors may be worn on the hand, fingers, foot, or waist, where they may be easily operated by tapping.

0023Another aspect of our invention is that it may be used for one or many purposes, and that the purposes may be changed as INCs are added or removed, as software or data is downloaded, or as a user changes activities. Purposes may include time-related, communications, entertainment, personal organization, guidance, athletic, physical therapy, medical, disability-related, travel-related, outdoor-related, identification, security, military, or other purposes or combinations of purposes.

0024Time-related purposes of our invention may include providing the current time, multiple time zones, stopwatch functions, and interval timing functions, and may also be used to synchronize other functions of the MPN. Communications functions may include communicating with another MPN to provide games, competitions, and to transfer personal information, software, music, and other information. Other communications functions may include telephone, paging, instant messaging, and electronic mail. Entertainment functions may include playing recorded music or radio, recording audio or video, or playing a game. Audio, video and images recorded by the user may be linked to other personal data that may have been simultaneously collected by the MPN. Personal organization functions may include scheduling appointments, managing contacts, managing a task list, and keeping an electronic journal. An electronic journal may support text, audio, sketch, image, and video entries, may automatically tag journal entries with time or location, may allow journal entries to be linked to database entries, and may allow journal entries to be uploaded to a personal computer and converted to a standard file format. Guidance functions may include providing position, elevation, and speed information, providing route guidance, and collecting and annotating position information with text, audio, video, and personal data. Guidance functions may also include recommending an athletic training route based on desired workout parameters, and comparing personal data collected during multiple sessions.

0025Athletic functions may include controlling a workout, including controlling individual sections of a workout, and collecting results from a workout. A coaching interface may provide creation and monitoring of a workout plan. Both music and audio athletic cues may be provided. An INC of the MPN may control a setting on a piece of exercise equipment, or may collect data from a piece of exercise equipment. The MPN may measure distance, speed, heart rate, cadence, stride length, and other athletic data. Errors in collected data may be corrected. Secondary performance parameters may be estimated based on collected data and other stored information. An athlete may be reminded to consume water, sodium, food, or other consumables. Two athletes with MPNs may be provided a competition. The MPN may provide lap counts, workout logging, and other lap swimming functions. The MPN may provide form feedback to an athlete. An athletic journal may also be provided.

0026Physical therapy functions may include measuring range of motion, doing gait analysis and form feedback, testing muscle strength, monitoring changes in physical capabilities, and providing a physical therapy journal. Medical functions may include measuring a metabolic value, detecting a medical problem, controlling a treatment device or taking other medical actions, providing emergency communications, providing storage of medical databases, and providing a medical journal. INCs may be worn or carried by a doctor, patient, or nurse, mounted on equipment such as a wheelchair, or implanted, injected, or ingested into a patient. Functions for a disabled user may include alternate output methods, alternate input devices, and mounting an INC on a wheelchair or other equipment.

0027Travel-related functions may include language translation, currency conversion, time zone conversion, route guidance, local information, guidebook functions, wildlife recognition, a travel journal, weather information, transit information, local entertainment information, and expense tracking. Outdoor-related functions may include direction, position, elevation, route, and weather features. Identity functions may use a smart card, personal code, or biometric information to identify a user to another person or system, and may provide exchange of money, product discounts, and purchasing features. Security functions may include an audible alert, an alert message to a public safety facility, and storing emergency contact and emergency medical information. Military functions may include communications, global positioning, guidance, and weather functions.

0028An MPN is a set of INCs that communicate using a wireless network. These INCs use a common communications protocol, such as the Bluetooth protocol or the IEEE 802.15 standard, to send messages between themselves. Using a common protocol means that the same electronic components and software can be used in each of them, keeping the cost low.

0029A common protocol also allows new INCs to be added more easily. This invention is "modular," in that new INCs can be added at any time. This may change the function of the overall system. As INCs are added, the system's capabilities will grow. As one INC replaces another, the functions of the system change accordingly. The system will continue to function, with reduced capabilities, as INCs are removed. INCs may be built by various manufacturers, and may have different capabilities.

0030Our invention is also "personal." This means that the MPN is small in size, roughly encompassing one person's "personal space." INCs may be worn by the user, they may be carried by the user, or they may just be in close proximity, for example mounted on personal equipment. Also "personal" is the fact that MPNs provide exactly the functions that the individual wants, because the combination of INCs is virtually limitless.

0031The MPN may be changed at any time, and the functions of the system may change correspondingly. For example, a new INC may be added, and a new function may be enabled by the system. An INC may be removed, and a function of the system may be disabled. The system may automatically detect a change in the MPN, and correspondingly change the functions. Alternatively, a user may enter a changed configuration, for example into a base station, control unit, or personal computer.

0032Another advantage of our invention is that it is extensible. This means that an INC can be added at any later time, even though that specific INC and its functions may not have been anticipated at the time the system was first put together. Each new INC uses the same communications methods and protocols to send and receive data and commands. The functions of the system are controlled by downloaded software. This means that new software can be downloaded to support the unanticipated new INC.

0033Software may be downloaded into an INC in the MPN, such as a "control unit." The control unit may include memory for holding software and data, and a processor. The control unit may send commands and data to some INCs and retrieve data from other INCs. By modifying the software in the control unit, the system may support previously unanticipated INCs. Software may also be downloaded into any other INC.

0034Software may be downloaded into an INC of the MPN by a personal computer. Software on the personal computer may control what is downloaded. The software on the personal computer may allow extensions to support unanticipated functions and INCs. The software extensions may allow the user to specify software modules to download, to configure parameters for the unanticipated INCs, or to perform other functions related to additional INCs and functions.

0035One of the INCs in the MPN may be a "base station." This base station may used to download information, such as software, data, setup options, and time, into at least one of the other INCs, such as the control unit. The base station may, for example, be connected to a personal computer. The base station, in that embodiment, may provide wireless connectivity to one or more of the other INCs, while the personal computer provides storage and a user interface for manipulating the information sent to and from the INCs in the MPN. The base station may communicate with the personal computer over a standard connection, such as a universal serial bus (USB), serial port, Ethernet, wireless network, infrared, PC Card interface, or over a direct connection to the personal computer's bus.

0036The personal computer may provide a user interface for controlling the INCs in the MPN. For example, the computer may Allow the user to specify what functions are to be enabled by the system, which may then determine what software to download. The user may set configuration parameters that would then be downloaded to the INC(s) in the MPN.

0037The base station or personal computer may also have a wide area network connection, such as an Internet connection. This may allow another person to control functions of the system. This could include a healthcare professional, if the system is being used for medical purposes. It might include a coach if the system is being used for athletic purposes. It might include a manufacturer or distributor of any of the INCs in the MPN, who may wish to download software and parameters into the system to support the INC.

0038The base station, personal computer, and/or computer over a network connection may also be used to upload data from any of the INCs in the MPN, such as a control unit or data collection INC. This data may be stored, modified, analyzed, displayed, or otherwise used on one of those other stations.

0039All of the INCs within a single MPN may be assigned a single unique identifier. This identifier may be downloaded, for example, from a base station or personal computer to each of the INCs. All communications between INCs may be tagged with this unique identifier. This will prevent interference between the two MPNs used by two different people. INCs in each system will only listen to messages tagged with that MPN's own identifier.

0040The unique identifier can also be used to deter theft and other misuse of any INC. Each INC can be programmed to not accept a different unique identifier without explicit authorization from the authorized user, for example on a base station or personal computer. The INCs may also be configured so that the unique identifier they use cannot be extracted to program into a different INC.

0041All of the INCs in a single MPN may be turned off or on with a single command. For example, a user may press a button or speak a command, which may be received by one of the INCs. The command to turn off may be sent to all of the INCs in the MPN. When any INC receives the turn off command, it may cease any data collection or control functions, stop sending any wireless communications, go into a low-power mode, and otherwise minimize power use. Other than periodically checking for a turn on message, the INC may cease all communications. The user input INC may continue monitoring for a turn on indication from the user. When the turn on command is received, the INC may resume its full capabilities. This feature may be useful to conserve power, as well as to minimize radio frequency interference in environments, such as on a commercial airliner, where wireless communication may cause interference.

0042Our invention may be controlled by a single module configured as a control unit. This may be an INC that is worn on the person like the other INCs in the MPN. The control unit may have the facility to allow software to be downloaded into it. The control unit may interface with and control the other INCs in the MPN over the wireless network, based on the downloaded software. This allows the functions of the system to be easily modified, simply by downloading different software. If desired, there may be no control unit, and some or all of the INCs may support software download. In addition to software or firmware, the control unit (or any other INCs in the MPN) may also allow the download of data, setup options and other configuration data, current time, or any other information. The control unit, or other INCs, may also allow the uploading of data to a base station or personal computer.

0043The control unit, if present, may be a separate INC, or it may be combined with another of the INCs, such as a display. In some cases, it may be more efficient to combine the functions of any two of the INCs into a single INC that provides multiple functions. Alternatively, any individual function may be provided by a single INC. The control unit, for example, may be a separate unit, worn on a waistband.

0044The control unit, if present, preferably has memory and a processor, in addition to its communication device. This memory and processor support downloading of information and software, as well as control of other INCs in the MPN.

0045For example, one of the INCs may be a display device. Traditionally, displays worn by a person have been in the form of a wrist display, such as a wristwatch. However, users of our invention can choose the type of display that best suits their needs. This may be a display worn on a wristband, carried in the hand or pocket, mounted on a piece of exercise equipment, mounted on a bicycle or in an automobile, or any other suitable method of carrying by the user. In fact, the user may have multiple display INCs, and pick the desired one at any time based on a specific activity.

0046Traditionally, a wristwatch-type display is worn on the back of the wrist. However, our invention allows the display to be worn or carried in any manner. For example, a runner who does not wish to turn the wrist to view the display may prefer a display that is mounted on the side of the wrist or hand, that can be viewed while maintaining proper running form. The display may be configured so that it can be worn on either the left or right side. It may be configured so that the top of the display is oriented toward the thumb, toward the back of the wrist, or at an angle between the two. Alternatively, it may allow the user to configure the orientation of the display by choosing between one or more options.

0047Our invention may provide a reusable wearable mount for a display INC or other INCs. This mount may allow the user to easily change one INC for another, to move the INC, or to reorient the INC.

0048Wrist displays today, such as wristwatches, typically have input controls and audio outputs built-in. These input controls are often tiny and difficult to use. These audio outputs, since they are located far from the user's ear, are often difficult to hear. Our invention does not require that these controls and outputs be integrated into the wrist display. In fact, our invention encourages each function to be placed where it is most usable. For example, the controls may be a set of switches, buttons, or other pressure-sensitive devices worn at convenient points on the body. For example, one sensor can be worn at the tip of each finger in a glove or partial glove. The user can then operate the system by tapping with different fingers or tapping specific sequences to enter different commands to the system. Alternatively, the sensors may be worn at different locations on a waistband, allowing the user to control the system by tapping different locations on the waist. The sensors may be worn on a foot, so that the system can be operated by tapping a foot. The controls may be mounted on a bicycle or piece of exercise equipment. Any other suitable types of controls may be used, including dials, levers, keyboards, voice inputs, touch pads and any suitable combination of multiple types of inputs.

0049Similarly, an audio output may be provided separately from the display and other INCs. For example, headphones or earphones may be used. Alternatively, one or more speakers may be worn inside a hat or headband, providing sound via conduction through the skull. Such embodiments allow the audio feedback to be loud enough to be easily heard by the user, even in poor conditions such as being on a busy street, while keeping the sounds quiet enough to not disturb other nearby people.

0050The system with an audio output INC may provide an audio output function. For example, music may be stored in a digital form in memory in the control unit or another INC with a storage capability and sent to the audio output INC. An INC may also generate audio feedback related to other functions provided by the system. For example, if the system is being used for athletic monitoring, audio feedback may be used to prompt the user to work out harder or easier, to provide performance information, or to inform the user what workout zone he or she is in.

0051The system may provide different audio outputs to signify different situations or conditions. For example, different sounds may be generated for different situations. Alternatively, different sound sequences may be generated for different conditions. As yet another embodiment, sound may be sent to different speakers for different conditions. Voice may also be synthesized. Any of these techniques may be combined.

0052The system may also provide both music and audio feedback. This is an example of one system providing multiple functions. In this case, the music may be paused, muted, or the volume may be lowered while the audio feedback is provided.

0053Our invention may be used for a wide variety of purposes or combination of purposes. If desired, one MPN may support different purposes at different times, as INCs are added or removed, as different software and data are downloaded, as the user performs different activities, etc.

0054One of the INCs in the MPN may be a clock. The time may be automatically downloaded to the clock from a base station or personal computer. The clock may support functions such as a stopwatch, an interval timer, a multiple event timer, a split timer, etc. The clock may also support other timing functions in the system, such as measuring speed, cadence, rate of elevation change, heart rate, etc. A clock may also be used to synchronize functions of the MPN.

0055The MPN may provide communication functions. For example, multiple MPNs may be used to send data from one user to another. This may be done, for example, with the same wireless transmitters and receivers used to communicate between INCs in a single MPN, as long as the users are close enough to each other. Alternatively, a stationary device may coordinate communications between two or more users.

0056Data sent between two systems may enable two or more users to play a game, for example, by sending commands, moves, results, etc. from one user to another. Data may allow two or more users to engage in an athletic competition, for example, by transmitting performance data between athletes. Personal data may also be sent between users, for example, name, contact information, etc. Users may also exchange recorded music, software, or any other data.

0057Our invention may be used to support personal communications. INCs may include a wireless telephone INC or a paging INC. INCs may support instant messaging, electronic mail, and other types of text communications. INCs may support voice communications or video communications. INCs may support transmission and receipt of any type of data, including image data, video data, audio data, and text data.

0058Our invention may be used for entertainment purposes. This may include allowing a user to play a game, to play music or view other media.

0059The MPN may allow collection of media data. For example, INCs may include a microphone or a video input. INCs may also include memory or another storage device to store media. The media collected, such as audio, video, or still images, may be replayed for the user by one of the INCs. The media may be uploaded to a base station or personal computer.

0060The MPN collecting media data may also collect other personal data. For example, the system may collect position data, heart rate data, athletic data such as speed, or other data. The media and personal data may be sent using the wireless network to a base station, and into a personal computer. The media data may be interpreted by a media interpretation unit or algorithm, such as a speech recognition system. The interpreted media data may be used to change the personal data collection functions.

0061A relationship may be defined when the media and personal data are collected. For example, the media data may be associated with the personal data collected at about the same time as the media was collected. That relationship may be noted in the data, and maintained as the data is uploaded to a base station or stored in a personal computer. For example, a voice note or a picture may be tagged as associated with data collected at a specific time during an athletic workout or other session.

0062An MPN may provide personal organizer functions. For example, the system may provide appointment scheduling, task management, and contact management. The system may also provide a mobile electronic journal. A journal may allow a user to create text or audio entries, and to annotate them with video, still images, audio, or sketches. The entries may be automatically tagged with the time and location. The user may be able to link a journal entry to an element in an application specific database, such as a medical database, a health database, a travel database, a music database, a work database, a school database, or a database related to any other suitable application. The MPN may support uploading the journal entries and related data to a personal computer, and converting them to a standard file format for viewing, editing, or printing on the personal computer. The journal may also include any other functions or features related to a specific application, such as medical features, health features, travel features, music features, work features, school features, or any other suitable application features.

0063Our invention may support guidance features. The MPN may include INCs such as a global positioning system monitor, an elevation monitor, or a compass. The system may display current location, direction, elevation, speed, or other related information. The system may provide route guidance, using downloaded map data. The system may collect location, direction, elevation, or speed data. The user may be allowed to annotate the collected data with audio, video, image, or other types of information. The system may automatically annotate the collected data with simultaneously collected personal information, such as heart rate data. The collected data and annotations may be uploaded to a personal computer, where they may be displayed. The data may be compared with map data. Data from multiple sessions may be compared. The system may use collected data to recommend a route in a later athletic session, based on a desired distance, elevation profile, or difficulty, and the user may be automatically guided through the recommended route. The system may also simulate a previous route.

0064Our invention may provide other athletic functions. For example, a workout plan may be created on an athlete's computer or a coach's computer. The plan may have a specific athletic or health goal, and may be used to define individual workout sessions. Individual workout sessions may include multiple sections, each of which may have an individual goal and individual control characteristics, such a parameter to control, a desired range of values for the parameter, data to collect, and duration. The control characteristics for a workout session may be downloaded into an INC of the MPN, and the system may use them to control aspects of the workout. Control may be accomplished by prompting the athlete, by sending a command to a piece of exercise equipment, or other suitable method. The system may use a servo algorithm to control the parameter. Results, such as speed, distance, heart rate, data from a piece of exercise equipment or bicycle, and other performance data, may be collected during the workout. Errors may be detected in the collected data, for example based on recognizing invalid sample values. Replacement data may be substituted for the invalid values, for example by interpolation. Secondary data, such as cadence, stride length, VO₂ max, oxygen uptake, maximum heart rate, percent of maximum heart rate, percent of heart rate reserve, energy consumed, power exerted, or lactate threshold may be derived based on the collected personal data and other personal data. The collected data or the derived secondary data may be displayed for the user during a workout, and it may be used to modify a workout. The data may be uploaded to the athlete's computer, coach's computer, or other suitable location, where it may be stored, displayed, compared between sessions, or otherwise analyzed. The collected or uploaded data may be used to modify future workouts. Progress may be measured against the goal of the workout plan. Workout data, and other information, may be maintained in a mobile athletic journal supported by the MPN.

0065Our invention may provide consumable reminders to an athlete. For example, the athlete may be reminded to drink water or a sports drink or to take a sodium supplement, based on metabolic measurements taken of the athlete, measurements of the amount of consumable carried, the time since the most recent reminder, the amount of the consumable carried by the athlete, or other suitable factors.

0066One MPN may interface with one or more other MPNs to allow multiple athletes to compete.

0067The MPN may be configured to provide lap swimming information. By using one or more monitors worn by the swimmer, the MPN may count laps, distinguish between different strokes, calculate the swimmer's speed, estimate total distance, and provide a log of an entire lap-swimming workout.

0068Our invention may be configured to monitor the form of the athlete, such as an athlete's running, walking, swimming, bicycling, or rowing form, and provide feedback, either during a training session or afterwards. The form feedback may be based on collecting accelerometer data during the training session and comparing it with data representing ideal form.

0069Our invention may provide physical therapy features. The form feedback described above may be used to provide gait analysis and other types of activity monitoring. The system may also be used to measure range of motion, test muscle strength, measure and record changes in physical capabilities, provide a therapy journal, or provide other suitable functions.

0070Medical features may also be supported by our invention. The system may monitor metabolic parameters, such as heart rate, blood oxygen, blood pressure, temperature, and blood sugar. The monitored parameters and other data may be used to estimate or predict a medical problem. The system may also control a medical device such as a syringe pump or defibrillator. It may also provide emergency medical communication, provide storage of medical databases, provide a mobile electronic medical journal, or other suitable medical functions. INCs may be worn or carried by a doctor, patient, or nurse, or mounted on equipment such as a wheelchair. In addition, an INC may be implanted or injected into a patient, or ingested by a patient. Our invention may also be configured to support a disabled user. This may include alternate output methods, alternate input devices, and mounting an INC on a wheelchair or other equipment.

0071Our invention may provide travel-related functions. These may include language translation, currency conversion, time zone conversion, route guidance, local information, guidebook functions, weather information, transit information, local entertainment information, and expense tracking. Our invention may provide a mobile travel journal. It may also provide automated or semi-automated wildlife recognition. Our invention may support users who enjoy outdoor activities. Functions for an outdoor user may include providing orientation (e.g., compass directions), determining position, displaying elevation, and providing route guidance. The system may provide weather features, such as environmental temperature, humidity, and barometric pressure.

0072Our invention may provide identity functions. The system may identify a user to another person or system. It may use a smart card, personal code, biometric information, or another suitable method to identify the user. Based on the identification, the system may provide exchange of money, product discounts and purchasing features. The identification may also be used to prevent unauthorized use of the MPN or any of its INCs. Other personal security features may be provided. For example, the MPN may provide an audible alert or an alert message to a public safety facility. An INC of the MPN may store emergency contact or emergency medical information, and provide that information when needed. Our invention may also support military functions. These may include communications, global positioning, route guidance, and weather functions.

0073Our invention may support multiple purposes within a single MPN. For example, one INC may support a function related to athletics, and another INC may support a function related to personal organization. A single INC may be used for multiple purposes. Each user may easily configure his or her own MPN with exactly the INCs that are needed to meet that user's individual needs. This minimizes cost to each user by allowing him or her to acquire just the INCs that are desired. Also, because similar INCs are used to serve multiple purposes across several different types of users, the cost of INCs can be held down. In addition, because many INCs may use some of the same electronic components, such as power sources and radio frequency transceivers, the cost to manufacture INCs can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS

0074Further features of our invention, its nature and various advantages will become more apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout, and in which: <ul id="ul0001" list-style="none"><li><figref idref="f0001">FIGs. <b>1A</b></figref> and <figref idref="f0002"><b>1B</b></figref> are block diagrams of an illustrative MPN;</li><li><figref idref="f0003">FIG. <b>2A</b></figref> is an illustrative table of manufacturers of INCs of MPNs;</li><li><figref idref="f0003">FIG. <b>2B</b></figref> is an illustrative table of models of INCs;</li><li><figref idref="f0004">FIG. <b>2C</b></figref> is an illustrative table of device types of INCs;</li><li><figref idref="f0004">FIG. <b>2D</b></figref> is an illustrative table of capability types of INCs;</li><li><figref idref="f0005 f0006 f0007">FIGs. <b>3A</b> through <b>3J</b></figref> are illustrative message definitions of a communications protocol that may be used within an MPN;</li><li><figref idref="f0008">FIG. <b>4</b></figref> is an illustrative data structure that may be used to track INCs in an MPN;</li><li><figref idref="f0009">FIG. <b>5</b></figref> shows a flow chart of an illustrative process for providing an MPN;</li><li><figref idref="f0010">FIGs. <b>6A</b></figref> and <figref idref="f0011"><b>6B</b></figref> are block diagrams of an illustrative MPN showing how INCs may be added and removed;</li><li><figref idref="f0012">FIG. <b>7</b></figref> is an illustrative display screen that may be used in configuring an INC of the MPN;</li><li><figref idref="f0013">FIG. <b>8</b></figref> is a flow chart of an illustrative process showing how an unanticipated INC may be added to an MPN;</li><li><figref idref="f0014">FIG. <b>9</b></figref> is a flow chart of an illustrative process showing how data may be downloaded to an INC of an MPN;</li><li><figref idref="f0015">FIG. <b>10</b></figref> is an illustration showing how two illustrative MPNs may interact;</li><li><figref idref="f0016">FIG. <b>11</b></figref> is a block diagram of an illustrative MPN showing how an INC may be programmed with a common network identifier;</li><li><figref idref="f0017">FIGs. <b>12</b> and <b>13</b></figref> are illustrative display screens that may be used in the programming of a common network identifier into an INC of an MPN;</li><li><figref idref="f0018">FIG. <b>14</b></figref> is a flow chart of an illustrative process for using a common network identifier within an MPN;</li><li><figref idref="f0019">FIG. <b>15</b></figref> is a block diagram showing how an MPN may communicate with a base station and a personal computer;</li><li><figref idref="f0020">FIG. <b>16</b></figref> is a flow chart of an illustrative process for uploading information from an INC of an MPN;</li><li><figref idref="f0021">FIG. <b>17</b></figref> is a block diagram of a portion of an MPN showing the use of a control unit;</li><li><figref idref="f0022">FIG. <b>18</b></figref> is a flow chart of an illustrative process for using a control unit as an INC of an MPN;</li><li><figref idref="f0023">FIG. <b>19</b></figref> is a flow chart of an illustrative process for providing personal components in an MPN;</li><li><figref idref="f0024 f0025 f0026">FIGs. <b>20A</b> through <b>20C</b></figref> show illustrative mounting means for INCs in an MPN;</li><li><figref idref="f0027">FIG. <b>21</b></figref> is a flow chart of an illustrative process for using an INC mounted on a piece of exercise equipment in an MPN;</li><li><figref idref="f0028 f0029">FIGs. <b>22A</b> through <b>22C</b></figref> show illustrative means for mounting a display device which is an INC in an MPN;</li><li><figref idref="f0030 f0031">FIGs. <b>23A</b> through <b>23F</b></figref> show additional illustrative means for mounting a display device which is an INC in an MPN;</li><li><figref idref="f0032">FIGs. <b>24A</b></figref> and <figref idref="f0033"><b>24B</b></figref> are flow charts of an illustrative process for providing a display device as an INC of an MPN;</li><li><figref idref="f0034">FIG. <b>25</b></figref> is a flow chart of an illustrative process for providing a reusable wearable mount for use with various INCs of an MPN;</li><li><figref idref="f0035 f0036">FIGs. <b>26A</b> through <b>26C</b></figref> show illustrative mounts that may be used with various INCs of an MPN;</li><li><figref idref="f0037">FIGs. <b>27A</b> through <b>27D</b></figref> show illustrative display devices that may be used as INCs in an MPN;</li><li><figref idref="f0038 f0039">FIGs. <b>28A</b> through <b>28D</b></figref> show illustrative audio output devices that may be used as INCs in an MPN;</li><li><figref idref="f0040">FIG. <b>29</b></figref> is a flow chart of an illustrative process for providing an audio output device as an INC in an MPN;</li><li><figref idref="f0041">FIG. <b>30</b></figref> is a flow chart of an illustrative process for providing a user input device as an INC in an MPN;</li><li><figref idref="f0042 f0043">FIGs. <b>31A</b> through <b>31C</b></figref> show illustrative means for mounting a user input device which is an INC in an MPN;</li><li><figref idref="f0044">FIG. <b>32</b></figref> is a flow chart of an illustrative process for using an MPN for multiple purposes;</li><li><figref idref="f0045">FIG. <b>33</b></figref> is a flow chart of an illustrative process for using an MPN for time-related purposes;</li><li><figref idref="f0046">FIG. <b>34</b></figref> is a block diagram of an illustrative MPN with a clock function;</li><li><figref idref="f0047">FIG. <b>35</b></figref> is an illustrative display screen that may be shown with the MPN of <figref idref="f0046">FIG. <b>34</b></figref><b>;</b></li><li><figref idref="f0048">FIG. <b>36</b></figref> is a flow chart of an illustrative process for using an MPN with a communication function;</li><li><figref idref="f0049">FIG. <b>37</b></figref> is a flow chart of an illustrative process for communicating between MPNs;</li><li><figref idref="f0050">FIGs. <b>38</b></figref> and <figref idref="f0051"><b>39</b></figref> are illustrations of communications between multiple MPNs;</li><li><figref idref="f0052">FIG. <b>40</b></figref> is a flow chart of an illustrative process for using an MPN with an entertainment function;</li><li><figref idref="f0052">FIG. <b>41</b></figref> is a flow chart of an illustrative process for using an MPN with personal organization features;</li><li><figref idref="f0053">FIG. <b>42</b></figref> is a flow chart of an illustrative process for using an MPN to provide a mobile electronic journal;</li><li><figref idref="f0054">FIGs. <b>43A</b></figref> and <figref idref="f0055"><b>43B</b></figref> are flow charts of illustrative processes for using an MPN to provide a guidance function;</li><li><figref idref="f0056">FIG. <b>44</b></figref> is a diagram of an illustrative MPN that may be used to provide a guidance function;</li><li><figref idref="f0057">FIGs. <b>45A</b> through <b>45L</b></figref> show illustrative screens that may be provided by an MPN in providing a guidance function;</li><li><figref idref="f0058 f0059">FIGs. <b>46</b> through <b>49</b></figref> show illustrative screens that may be used with a modular personal computer that provides a guidance function;</li><li><figref idref="f0060">FIG. <b>50</b></figref> is a flow chart of an illustrative process for providing an athletic function in an MPN;</li><li><figref idref="f0061">FIG. <b>51</b></figref> is a flow chart of an illustrative process for providing workout control and feedback using an MPN;</li><li><figref idref="f0062">FIG. <b>52</b></figref> is a block diagram of an illustrative system for communicating between a personal computer and an INC of an MPN;</li><li><figref idref="f0063">FIG. <b>53</b></figref> is a block diagram of an illustrative MPN that controls aspects of an athletic workout and collecting results from a workout;</li><li><figref idref="f0064">FIG. <b>54</b></figref> is a block diagram of an illustrative system for communicating among an MPN, an athlete's personal computer, and a coach's personal computer;</li><li><figref idref="f0065">FIG. <b>55</b></figref> is a diagram of an illustrative MPN that may be used to provide control of an athletic workout and collect workout results;</li><li><figref idref="f0066">FIG. <b>56</b></figref> is a flow chart of an illustrative process for managing a workout plan used with an MPN;</li><li><figref idref="f0067">FIG. <b>57</b></figref> is a flow chart of an illustrative process for defining workout parameters used in an MPN;</li><li><figref idref="f0068">FIG. <b>58</b></figref> is an illustrative screen that may be shown for defining a workout to be used with an MPN;</li><li><figref idref="f0069">FIG. <b>59</b></figref> is an illustrative data structure that may be used to store information about a workout session to be controlled using an MPN;</li><li><figref idref="f0070">FIG. <b>60</b></figref> is a flow chart of an illustrative process for controlling multiple sections of a workout using an MPN;</li><li><figref idref="f0071">FIG. <b>61</b></figref> is a flow chart of an illustrative process for estimating a derived performance parameter using stored information;</li><li><figref idref="f0072">FIG. <b>62</b></figref> is a diagram of an illustrative MPN that may be used to measure a primary performance parameter and estimate a secondary performance parameter;</li><li><figref idref="f0073">FIG. <b>63</b></figref> is an illustrative display screen that may be displayed to allow the entry of personal data to be used with an MPN;</li><li><figref idref="f0074">FIGs. <b>64A</b> through <b>64F</b></figref> show illustrative display screens that may be displayed by a display INC in an MPN during an athletic effort;</li><li><figref idref="f0075">FIG. <b>65</b></figref> is a diagram of an illustrative MPN that may be used to collect data and that may detect invalid data and estimate replacement data for the invalid data;</li><li><figref idref="f0076">FIG. <b>66</b></figref> is a flow chart of an illustrative process for estimating replacement data for invalid collected data;</li><li><figref idref="f0077">FIG. <b>67</b></figref> is an example of heart beat data that may have been collected by an MPN;</li><li><figref idref="f0078">FIGs. <b>68A</b> and <b>68B</b></figref> show an example of collected heart rate data with invalid samples and an example of replacement data;</li><li><figref idref="f0079">FIGs. <b>69A</b> and <b>69B</b></figref> show illustrative display screen that may show collected primary and secondary data with replacement data for invalid samples;</li><li><figref idref="f0080">FIG. <b>70</b></figref> is a flow chart of an illustrative process for providing an athlete with cadence and stride information using an MPN;</li><li><figref idref="f0081">FIG. <b>71</b></figref> is a flow chart of an illustrative process for providing consumption reminders to an athlete;</li><li><figref idref="f0082">FIG. <b>72</b></figref> is a diagram of an illustrative MPN that may be used to provide consumable reminders to an athlete;</li><li><figref idref="f0083">FIG. <b>73</b></figref> is an illustrative display screen that may be used by an MPN to provide a consumable reminder;</li><li><figref idref="f0084">FIG. <b>74</b></figref> is a flow chart of an illustrative process for providing swimming-related information using an MPN;</li><li><figref idref="f0085">FIG. <b>75</b></figref> is a diagram of an illustrative MPN that may be used to provide lap swimming information;</li><li><figref idref="f0086">FIGs. <b>76A</b> and <b>76B</b></figref> are illustrative display screens that may be used by an MPN to provide lap swimming information;</li><li><figref idref="f0087">FIG. <b>77</b></figref> is an illustrative display screen that may be shown in conjunction with an MPN used for collecting swimming-related information;</li><li><figref idref="f0088">FIG. <b>78</b></figref> is a flow chart of an illustrative process for providing gait or form feedback using an MPN;</li><li><figref idref="f0089">FIG. <b>79</b></figref> is a diagram of an illustrative MPN that may be used to provide form feedback during a training activity;</li><li><figref idref="f0090">FIGs. <b>80A</b> through <b>80C</b></figref> are illustrative display screens that may be shown to a user by an MPN to provide form feedback during a training activity;</li><li><figref idref="f0091">FIG. <b>81</b></figref> is an illustrative display screen that may be shown in conjunction with an MPN used for providing gait or form feedback;</li><li><figref idref="f0092">FIG. <b>82</b></figref> is a flow chart of an illustrative process for providing an athletic training journal using an MPN;</li><li><figref idref="f0092">FIG. <b>83</b></figref> is a flow chart of an illustrative process for providing physical therapy functions using an MPN;</li><li><figref idref="f0093">FIG. <b>84</b></figref> is a flow chart of an illustrative process for providing medical functions using an MPN;</li><li><figref idref="f0094">FIG. <b>85</b></figref> is a flow chart of an illustrative process for estimating a medical problem using an MPN;</li><li><figref idref="f0095">FIG. <b>86</b></figref> is a flow chart of an illustrative process for providing a mobile electronic medical journal using an MPN;</li><li><figref idref="f0096">FIG. <b>87</b></figref> is an illustrative block diagram of a mobile electronic medical journal;</li><li><figref idref="f0097">FIG. <b>88</b></figref> is a flow chart of an illustrative process for providing features for a disabled user with an MPN;</li><li><figref idref="f0098">FIG. <b>89</b></figref> is a flow chart of an illustrative process for providing travel-related functions using an MPN;</li><li><figref idref="f0099">FIG. <b>90</b></figref> is an illustrative block diagram of an MPN that may be used to provide travel-related functions;</li><li><figref idref="f0100">FIG. <b>91</b></figref> is a flow chart of an illustrative process for providing a mobile electronic travel journal using an MPN;</li><li><figref idref="f0101">FIG. <b>92</b></figref> is a flow chart of an illustrative process for assisting a user in identifying wildlife using an MPN;</li><li><figref idref="f0102">FIG. <b>93</b></figref> is a flow chart of an illustrative process for providing outdoor-related functions using an MPN;</li><li><figref idref="f0103">FIG. <b>94</b></figref> is a flow chart of an illustrative process for providing identification functions using an MPN;</li><li><figref idref="f0104">FIG. <b>95</b></figref> is a flow chart of an illustrative process for providing security functions using an MPN;</li><li><figref idref="f0105">FIG. <b>96</b></figref> is a flow chart of an illustrative process for providing military functions using an MPN;</li><li><figref idref="f0106">FIG. <b>97</b></figref> is an illustrative diagram of an MPN that may be used to provide multiple functions;</li><li><figref idref="f0107">FIG. <b>98</b></figref> is a flow chart of an illustrative process for providing music, media collection, and personal data collection using an MPN;</li><li><figref idref="f0108">FIG. <b>99</b></figref> is an illustrative data structure that may be used to store personal data and related media data;</li><li><figref idref="f0109">FIG. <b>100</b></figref> is an illustrative overview of the MPN; and</li><li><figref idref="f0110">FIGs <b>101A</b></figref> and <figref idref="f0111"><b>101B</b></figref> are flow charts of an illustrative process for turning off and turning on an MPN.</li></ul>

DETAILED DESCRIPTION

0075<figref idref="f0109">FIG. <b>100</b></figref> shows an overview of how an illustrative modular personal network (MPN) may be used. The MPN is associated with a user <b>1.</b> The MPN may include multiple individual network components (INCs), each of which may have one or more primary functions. Each INC may include a wireless transceiver for communicating with other INCs in the MPN. The wireless network may be associated with user <b>1,</b> for example, within a few meters of the user. Each INC may be worn or carried by user <b>1,</b> or otherwise in the user's immediate vicinity. For example, INC <b>2,</b> which may be worn on the user's waist, may be a control unit that includes a processor and memory, to store and run software to control other INCs in the MPN. INC <b>3,</b> which may be worn on the user's hand or wrist, may be a display device. If desired, a variety of mountings may be provided to allow the display to be seen optimally in variety of circumstances, such as mounting on the side of the hand or wrist. If desired, a reusable mount may allow a display or other INC to be easily repositioned, reoriented, and replaced. INC <b>4,</b> which may be a headset or may be worn in a headband or hat, may be an audio output device. One or more speakers may be worn in the ear, or may be worn against the skin near the ear. The audio output device may support output of tones, music, or voice. Audio cues of various types may be generated. If desired, the audio output device may provide multiple types of audio output. One output may be paused or muted while the other is provided. INCs <b>5, 7,</b> and <b>7</b> may be user input devices. Any suitable type of user input may be provided, such as voice input, buttons, a portable keyboard, or a stylus. As shown, pressure sensors are worn in the fingertips of a glove, and are operated by tapping with the fingers. Different commands may be indicated by tapping with different fingers or in different sequences. If desired, such pressure sensors may be worn on the hand, at the waist, on the foot, or in any other suitable manner. INC <b>8</b> may provide another function for the user, such as an input function, an output function, a storage function, or a control function. As many or as few INCs may be included in the MPN as desired. If desired, one or more INCs may be removed from the MPN to remove functions, and one or more INCs, such as INC <b>9,</b> may be added to add other functions. The changed configuration may be determined dynamically or the changes may be indicated by the user.

0076Second user <b>10</b> may have a second MPN. For example, second user <b>10</b> may be riding a bicycle. INC <b>11</b> may be mounted on the handlebars of the bicycle and may include display functions, user input functions, and control unit functions. INC <b>12</b> may be an audio output device, mounted on second user <b>10</b>'s helmet. INC <b>13</b> may be a sensor mounted on the bicycle to measure its speed. When second user <b>10</b> comes into range of first user <b>1</b>'s MPN, there is no interference. Each INC in either MPN is programmed with a network identifier that is common to all INCs in the MPN but unique among different MPNs. Each message sent from one INC in an MPN to another INC in the same MPN may be tagged with the common network identifier or with a unique component identifier of the target INC, so that no unintended INCs process the message. In addition, the network identifier may be stored in secure memory in each INC, so that the INC cannot be used in a different MPN without explicit authorization from the user who programmed the network identifier.

0077The MPN may interface with a more stationary device, such as base station <b>15</b> or personal computer <b>16.</b> Base station <b>15</b> may act as part of the MPN when the MPN is within range. Base station <b>15</b> may include a wireless communication device to communicate with one or more of the INCs in the MPN. Alternatively, base station <b>15</b> may communicate with one of the INCs using another means, such as a serial cable, USB, a docking station, infrared, or other connection. Personal computer <b>16</b> may communicate with base station <b>15.</b> Alternatively, personal computer <b>16</b> may communicate directly with one or more INCs, acting as a base station. Personal computer <b>16</b> or base station <b>15</b> may download software, data, settings, and other information to one or more INCs. For example, software may be downloaded to control one or more INCs, or to implement one or more features. As unanticipated INCs are added to the MPN, new software modules may be downloaded to control and interface with them, and an application on personal computer <b>16</b> may be used to configure settings related to the new INCs. Personal computer <b>16</b> and base station <b>15</b> may be used to program the common network identifier into each INC in the MPN. Data may be uploaded from one or more INCs to personal computer <b>16</b> to be stored, displayed, or analyzed. If desired, personal computer <b>16</b> may communicate with another computer <b>18</b> over a wide area network <b>17,</b> such as the Internet. Software, data, settings, and other information may be sent from computer <b>18</b> to personal computer <b>16</b> for use with the MPN, and data from the MPN may be sent from personal computer <b>16</b> to computer <b>18.</b>

0078An MPN may be used for one or more purposes. For example, the MPN may support a global turn on or turn off feature, in which all active devices may be disabled or re-enabled with a single command to a single INC. The MPN may provide clock functions <b>20,</b> such as providing the current time and date, supporting multiple time zones, providing stopwatch features, and synchronizing other features of the MPN. The MPN may provide communication functions <b>25,</b> such as communicating with another MPN to support games, competitions, and other types of data transfers, telephone features, paging features, instant messaging, and electronic mail. The MPN may provide entertainment functions <b>30,</b> such as playing music, recording audio and video media, and games. The MPN may provide personal organization functions <b>35,</b> such as scheduling appointments, managing contacts, tracking tasks, and maintaining a mobile electronic journal. The MPN may support guidance functions <b>40,</b> such as showing current position, speed, and elevation, providing route guidance, collecting and annotating position and speed data, and recommending an athletic training route. The MPN may support athletic functions <b>45,</b> such as supporting a workout plan, supporting workout definition, controlling a workout, communicating with exercise equipment, collecting athletic data, detecting and correcting errors in collected data, estimating secondary data based on collected data, providing competition between users of multiple MPNs, logging lap swim workouts, providing form feedback, and providing an athletic training journal.

0079The MPN may support physical therapy and medical functions <b>50,</b> such as measuring range of motion, gait analysis, measuring muscle strength, measuring changes in physical therapy, monitoring a metabolic value, detecting a medical problem, controlling a treatment device, providing emergency communication, storing medical databases, providing an electronic medical journal, and supporting INCs that may be injected, ingested, or implanted. The MPN may provide disabled access <b>55,</b> such as alternate input devices, alternate output devices, and alternate INC mounting means. The MPN may support travel functions <b>60,</b> such as language translation, currency conversion, time zone conversion, route guidance, local information, guidebook features, wildlife recognition, a mobile electronic travel journal, weather information, local transit and entertainment schedules, and expense tracking. The MPN may support outdoor functions <b>65,</b> such as compass direction, geographical location, route guidance, elevation reporting, and weather features. The MPN may support identity functions <b>70,</b> such as identifying a user to another user or another system, providing exchange of money, providing product discounts, and providing product purchasing. The MPN may support personal security functions <b>75,</b> such as an audible alert, an alert message to a public safety facility, and storage of emergency information. The MPN may support military functions <b>80,</b> such as communications, geographical position, route guidance, and weather features. The MPN may support combinations of functions, and its functions may vary over time as INCs are added or removed, as different software or data is downloaded, or as the user's needs change.

0080<figref idref="f0001">FIG. <b>1A</b></figref> shows a block diagram of illustrative MPN <b>100A.</b> This MPN includes INCs <b>110A, 110B, 110C,</b> and <b>110/d.</b> Each INC includes communication device <b>120,</b> for communicating with other INCs over wireless communication path <b>140.</b> Communication device <b>120</b> may be, for example, a standard radio frequency wireless transceiver with a range appropriate for a personal network (e.g., between six feet and sixty feet). Communication device <b>120</b> may also include hardware and software implementing a standard wireless protocol, such as Bluetooth or IEEE 802.15. An antenna may be included. If desired, transmitter and receiver may be separate devices. Not shown in each INC is a power source.

0081Each INC also includes one or more other functions <b>130-137.</b> These other functions may be provided by hardware and/or software incorporated into the INC. The software may be firmware provided with the INC, or it may be downloaded into the INC over communication path <b>140</b> or using other means.

0082<figref idref="f0002">FIG. <b>1B</b></figref> shows how MPN <b>100A</b> may be modified to become MPN <b>100B.</b> In the modified MPN, INC <b>110C</b> has been removed, and <b>INC 110E</b> has been added. Correspondingly, other function <b>135</b> associated with INC <b>110C</b> is no longer available, and other functions <b>138</b> and <b>139</b> associated with INC <b>110E</b> are now available.

0083Different manufacturers may manufacture INCs. Each manufacturer may be assigned a unique manufacturer identifier, as shown in table <b>210</b> of <figref idref="f0003">FIG. <b>2A</b></figref><b>.</b> Each manufacturer may provide various types of INCs, each of which may be assigned a model identifier by the manufacturer, as shown in table <b>220</b> of <figref idref="f0003 f0004">FIG. <b>2</b></figref><b>B.</b> The model identifier may be unique for a specific manufacturer.

0084There may also be defined a set of device types, as shown in table <b>230</b> of <figref idref="f0004">FIG. <b>2C</b></figref><b>.</b> The device type identifiers may be standard across all manufacturers and models. For example, Model 3 by Manufacturer 2 may have the same device type as Model 7 by Manufacturer 12. Device types may be divided into a range for input devices <b>234</b> and a range for output devices <b>232.</b> It may also have ranges <b>236</b> and <b>238</b> for manufacturers to use when a standard device type has not yet been assigned. An INC may have multiple device types, if it has multiple functions <b>130-139</b> (<figref idref="f0001 f0002">FIG. 1</figref>).

0085For each device type, there may be a standard set of defined capabilities, which may or may not be supported by any specific INC with that device type. For example, as shown in table <b>240</b> of <figref idref="f0004">FIG. <b>2D</b></figref><b>,</b> device type 257, which may be an audio output INC, may have three standard capabilities, any of which may or may not be supported by any particular audio output INC. Capability <b>242</b> may be the ability to output stereo audio. Capability <b>244</b> may be the ability to control the output volume of the audio. Capability <b>246</b> may specify the number of volume increments supported by a particular INC. These capabilities are merely illustrative.

0086The manufacturer identifier, model identifier, one or more device types, and any supported device capabilities and values may be stored in read-only memory in the INC, and provided over communication path <b>140</b> (<figref idref="f0001 f0002">FIG. <b>1</b></figref>), to allow the INC to be identified by another INC.

0087<figref idref="f0005 f0006 f0007">FIGs. <b>3A</b> through <b>3J</b></figref> illustrate an exemplary communications protocol that may be used between INCs in an MPN. The protocol may include a defined set of messages that may be sent from one INC to another. This message protocol may be encapsulated in one or more lower-level protocols, such as Bluetooth or IEEE 801.15. If desired, this protocol may function on different lower-level protocols in different environments.

0088As shown in <figref idref="f0005">FIG. <b>3A</b></figref><b>,</b> each message may include message type <b>301</b> and error detection/correction fields <b>302.</b> Message type <b>301</b> may indicate to the receiving INC how to process the message. Error detection/correction may include parity, checksums, cyclic redundance checks (CRCs), or other mechanisms for detecting that a received message has one or more errors, and possibly correcting the error(s).

0089Identity request message <b>300</b> of <figref idref="f0005">FIG. <b>3A</b></figref> may be sent by an INC (such as a control unit or base station) wishing to determine the identity and characteristics of one or more other INCs in the MPN. For example, this message may be broadcast and all other INCs in the MPN may respond. Identity request message <b>300</b> may include a unique network identifier <b>303</b> common to all INCs in the MPN. It may include a network address <b>304</b> of the INC sending the request. Each INC in the MPN may have a network address that is unique among all INCs in the MPN. Identity request message <b>300</b> may also include controller identifier <b>305.</b> This may be an identifier that is unique across all INCs, and it may correspond to the control unit, base station, or other INC that is sending the message.

0090Component identity message <b>310</b> of <figref idref="f0005">FIG. <b>3B</b></figref> may be sent by an INC in response to identity request message <b>300.</b> It may include network identifier <b>311</b> of the INC sending the message. Network identifier <b>311</b> may be the same as the network identifier <b>303</b> in the requesting message, if both INCs are part of the same MPN. It may be blank if this INC has not yet been assigned to an MPN. It may be different if this INC belongs to a different MPN. If this INC has been assigned to an MPN, component identity message <b>310</b> may also include network address <b>312.</b>

0091Component identity message <b>310</b> may also include information about the type of INC and its capabilities that may be stored in read-only memory in the INC. For example, the message may include component identifier <b>313,</b> which may be the identifier for this INC that is unique across all INCs. The message may also include manufacturer identifier <b>314,</b> model identifier <b>315,</b> one or more device types <b>316,</b> and capability list <b>317.</b>

0092Net address assignment message <b>320</b> of <figref idref="f0005">FIG. <b>3C</b></figref> may be sent by a control unit, base station, or other INC to configure a newly detected INC to function within the MPN. It may include controller identifier <b>305.</b> It may include the new network identifier <b>321</b> and network address <b>322</b> to be programmed into the INC. It may include component identifier <b>313</b> to ensure that the correct INC processes the message. It may also include security code <b>323</b> to ensure that unauthorized personnel do not change the network identifier and network address.

0093On processing net address assignment message <b>320,</b> the INC may respond with network acknowledgement message <b>330</b> of <figref idref="f0005">FIG. <b>3D</b></figref><b>.</b> This message may repeat component identifier <b>313,</b> network identifier <b>321,</b> and network address <b>322,</b> to inform the controller that the operation was successful. Alternatively, the message may include a field indicating success or failure of the operation, and the reason for failure if it was not successful.

0094Output data request message <b>340</b> of <figref idref="f0006">FIG. <b>3E</b></figref> may be sent to an INC that is capable of outputting. It may include the network identifier <b>321</b> and network address <b>322</b> of the INC that is to perform the output function. The message may include request serial number <b>341.</b> This number may be used by the requesting INC and the outputting INC to keep track of multiple pending requests. Output data request message <b>340</b> may include device type <b>316</b> and capability type <b>317</b> to inform an INC that supports multiple output functions how to process the data. Output data request message <b>340</b> may also include the data to output <b>342.</b> The format of this data may depend on the type of INC receiving the data and how it is to be processed.

0095After processing output data request message <b>340,</b> the output INC may respond with output acknowledgement message <b>350</b> of <figref idref="f0006">FIG. <b>3F</b></figref><b>.</b> This message may include network identifier <b>321,</b> network address <b>322,</b> and request serial number <b>341</b> to allow the controller to determine which request this acknowledgement corresponds to. It may also include acknowledgement code <b>351,</b> which may indicate whether the request was processed correctly, and if not successful may include a reason for the failure.

0096Input data request message <b>360</b> of <figref idref="f0006">FIG. <b>3G</b></figref> may be sent to an INC that is capable of inputting. It may include the network identifier <b>321</b> and network address <b>322</b> of the INC that is to perform the input function. The message may include request serial number <b>361.</b> This number may be used by the requesting INC and the inputting INC to keep track of multiple pending requests. Input data request message <b>360</b> may include device type <b>316</b> and capability type <b>317</b> to inform an INC that supports multiple input functions how to process the data.

0097After processing input data request message <b>360,</b> the input INC may respond with input acknowledgement message <b>370</b> of <figref idref="f0007">FIG. <b>3H</b></figref><b>.</b> This message may include network identifier <b>321,</b> network address <b>322,</b> and request serial number <b>361</b> to allow the controller to determine which request this acknowledgement corresponds to. It may include acknowledgement code <b>371,</b> which may indicate whether the request was processed correctly, and if not successful may include a reason for the failure. It may also include the requested data <b>372,</b> formatted as appropriate for the device and data type.

0098An INC may also send unsolicited data message <b>380</b> of <figref idref="f0007">FIG. <b>3I</b></figref>. This message may be sent when the INC has acquired some data for which there may be an ongoing request, or when the INC has entered a state, such as an error condition, that needs to be reported to a control unit, base station, or other INC. This message may include the network identifier <b>321</b> and network address <b>322</b> of the INC. It may include device type <b>316</b> and capability type <b>317</b> to allow the receiving INC to know how to process the data. It may also include data <b>381,</b> formatted as appropriate for the device type and capability type.

0099A control unit, base station, or other INC may periodically send out network poll message <b>390</b> of <figref idref="f0005 f0006 f0007">FIG. <b>3</b></figref><b>J.</b> This message is sent to determine whether an INC is still present on the MPN. It may include network identifier <b>321</b> and network address <b>322</b> of the INC being polled. The polled INC may respond with component identity message <b>310</b> or other suitable message.

0100The message types shown in <figref idref="f0005 f0006 f0007">FIGs. <b>3A</b> through <b>3J</b></figref> are merely illustrative. Other types of messages may be defined and sent between INCs in the MPN. For example, a command may be sent to turn on an INC or to turn off an INC. If desired, a command may be broadcast to all INCs in an MPN, rather than addressed to a specific INC.

0101Table <b>400</b> of <figref idref="f0008">FIG. <b>4</b></figref> shows an illustrative data structure that may be maintained by a control unit, base station, or other INC to track INCs on the MPN. If desired, multiple INCs in the MPN may maintain such information. Column <b>410</b> may hold the network address of each INC. Column <b>420</b> may hold the component identifier of each INC. Column <b>430</b> may hold the manufacturer identifier of the INC. Column <b>440</b> may hold the model identifier of the INC. Column <b>450</b> may hold the device type of each INC. Multiple device types may be stored for a single INC if desired. Column <b>460</b> may hold a list of capability types for each device type listed for each INC. Column <b>460</b> may also hold specific values related to each capability type. Column <b>470</b> may hold a flag indicating whether the INC is currently active. For example, if an INC has not recently responded to a network poll message <b>390</b> (<figref idref="f0005 f0006 f0007">FIG. <b>3</b></figref><b>J</b>), flag <b>470</b> may be changed to indicate that the INC is no longer active. If an INC responds to an identity request message <b>300</b> (<figref idref="f0005">FIG. <b>3A</b></figref>), the INC may be added to table <b>400</b> if it is not already present, and flag <b>470</b> may be set indicating that the INC is active.

0102Table <b>400</b> is merely illustrative. Other columns may be included. Other data structures may be used. If desired, this information may be stored in multiple data structures.

0103<figref idref="f0009">FIG. <b>5</b></figref> shows flow chart <b>500</b> of an illustrative process for providing an MPN. All steps are optional and may be performed in any suitable order. In step <b>510,</b> multiple INCs may be provided. This may include substep <b>514</b> of providing wireless communications with each INC. It may also include substep <b>512</b> of providing at least one primary function for each INC. The primary function may correspond to other function <b>130-139</b> (<figref idref="f0001">FIGs. <b>1A</b></figref> and <figref idref="f0002"><b>1B</b></figref><b>).</b> If desired, an INC may include multiple primary functions. Alternatively, an INC may include a primary function, a secondary function, etc.

0104In step <b>520,</b> INCs may be changed dynamically. This may include substep <b>522</b> in which an INC may be removed. It may also include substep <b>524</b> in which a new INC may be added. In step <b>530,</b> the change may be detected automatically, for example using messages <b>300</b> through <b>390</b> of the communications protocol of <figref idref="f0005 f0006 f0007">FIGs. <b>3A</b> through <b>3J</b></figref><b>.</b> The system may alternatively allow a user to enter information about the change in step <b>535.</b> For example, a user may add or remove an entry for an INC from a configuration screen on a personal computer.

0105In step <b>540,</b> the functions of the MPN may be adjusted to compensate for the change. In substep <b>542,</b> this may include removing a function from the MPN that may have been provided (or partly provided) by the removed INC. In substep <b>544,</b> this may also include adding a function to the MPN that may be at least partly supported by the new INC.

0106<figref idref="f0010">FIG. <b>6A</b></figref> shows illustrative MPN <b>600</b> showing how software may be downloaded to control INCs. MPN <b>600</b> may interface with personal computer <b>610</b> to control downloading and configuration functions.

0107Personal computer <b>610</b> may include control application <b>620,</b> which may be configured to control downloading to an MPN and configuring various aspects of MPN functions. Control application <b>620</b> may support plug-ins for different types of INCs. For example, plug-in A <b>622</b> may support downloading code to support INC A <b>650.</b> Plug-in A <b>622</b> may support loading driver A <b>626,</b> for example from local storage such as a compact disk or over the Internet, as well as downloading driver A <b>626.</b> It may also support configuring INC A <b>650,</b> as well as downloading data to and uploading data from INC A <b>650.</b>

0108Personal computer <b>610</b> may include communications device <b>612</b> for communicating with one of the INCs, such as a control unit <b>630,</b> using communication path <b>670.</b> Control unit <b>630</b> may include communications device <b>632</b> for communicating with personal computer <b>610.</b> Communications device <b>612,</b> communications device <b>632,</b> and communication path <b>670</b> may be, for example: a docking station and connector; a Universal Serial Bus (USB) port; infrared transmitters and receivers; serial ports; Ethernet connectors; radio frequency (RF) transceivers; or any other suitable communications means. If desired, communications may be performed wirelessly, and communications device <b>632</b> may be the same as wireless communications device <b>636</b> used to communicate between control unit <b>630</b> and other INCs.

0109One of the INCs may be a control unit <b>630.</b> Control unit <b>630</b> may include processor <b>634</b> and memory <b>638,</b> as well as communications device <b>632</b> for communicating with personal computer <b>610,</b> and wireless communications device <b>636</b> for communicating with other INCs over wireless communication path <b>675.</b> Memory <b>638</b> may hold control software <b>640</b> which may include firmware, operating system, boot software, communication software, and the like. Memory <b>638</b> may also hold downloaded driver A <b>626</b> for controlling INC A <b>650.</b>

0110MPN <b>600</b> may also include INC A <b>650.</b> This component may include wireless communications device <b>652</b> for communicating with control unit <b>630</b> and other INCs over wireless communication path <b>675.</b> INC A <b>650</b> may also include device hardware and firmware <b>654</b> for performing one or more primary functions of the INC.

0111In operation, a user may run control application <b>620</b> on personal computer <b>610.</b> The user may load and run plug-in A <b>622</b> to configure MPN <b>600</b> to function with INC <b>650.</b> The user may load driver A <b>626</b> and download it to control unit <b>630.</b> Control unit <b>630</b> may subsequently use downloaded driver A <b>626</b> to control the functions of INC A <b>650.</b> The user may also use plug-in A <b>622</b> to configure aspects of INC A <b>650,</b> to download data to the INC, to upload data that may have been collected by the INC, or to perform other functions related to INC A <b>650.</b>

0112In <figref idref="f0011">FIG. <b>6B</b></figref><b>,</b> INC B <b>660</b> has been added to MPN, creating new MPN configuration <b>605.</b> INC B <b>660</b> may include wireless communications device <b>662</b> for communicating with control unit <b>630</b> and other INCs over wireless communication path <b>675.</b> It may also include device hardware and firmware <b>664</b> for performing one or more primary functions associated with INC B <b>660.</b>

0113Plug-in B <b>624</b> may be loaded into control application <b>620</b> on personal computer <b>610,</b> for controlling aspects of INC B <b>660.</b> Driver B <b>628</b> may be loaded into personal computer <b>610</b> and downloaded into control unit <b>630</b> for subsequently controlling INC B <b>660.</b>

0114Although <figref idref="f0010">FIGs. <b>6A</b></figref> and <figref idref="f0011"><b>6B</b></figref> show drivers being downloaded into a control unit, software may alternatively be downloaded into any of the INCs, for example, if control unit <b>630</b> is not present.

0115<figref idref="f0012">FIG. <b>7</b></figref> shows illustrative screen <b>700</b> of MPN <b>600</b> (<figref idref="f0010">FIG. <b>6A</b></figref>) that may be displayed by control application <b>620</b> and plug-in A <b>622</b> on personal computer <b>610.</b> Menu bar <b>710</b> may allow the user to access various application functions, such as file functions, security functions, device functions, system functions, help functions, and the like. Item <b>720</b> may display information about the INC, such as the name of the manufacturer, the model number, capabilities, and other suitable information. Item <b>730</b> may display the version number of the device plug-in currently loaded on personal computer <b>610.</b> Button <b>735</b> may allow the user to download the selected driver to control unit <b>630</b> or other INC. Button <b>737</b> may allow the user to load a more recent driver from the Internet. Region <b>740</b> may allow the user to set various configuration parameters associated with the INC. For example, region <b>742</b> may allow the user to enter text for a first parameter. Selection <b>745</b> may allow the user to select from a set of options for a second parameter. This screen is purely illustrative and may be configured and designed in any suitable manner.

0116<figref idref="f0013">FIG. <b>8</b></figref> shows flow chart <b>800</b> of an illustrative process to allow an unanticipated INC to be added to the MPN. For example, after a user has several INCs of an MPN, a new INC with a new capability may be manufactured. The user does not need to discard any existing INCs; they can continue to be used just as they have been. The unanticipated INC can be added to the MPN and the capabilities of the MPN will be expanded to encompass the capabilities of the new INC.

0117All steps are optional and may be performed in any suitable order. In step <b>810,</b> the unanticipated INC may be added to the MPN. The system may detect the INC using an identity request message <b>300</b> (<figref idref="f0005">FIG. <b>3A</b></figref>). In step <b>820,</b> a software application may be run, for example on a personal computer, which controls downloading software objects to INCs. In step <b>830,</b> that application may be used to download the specific software object to control the unanticipated INC. In step <b>840,</b> software may be downloaded to control the unanticipated INC. The software may be downloaded, for example, to a control unit. Alternatively, the software may be downloaded to the unanticipated INC itself. In substep <b>842,</b> multiple software objects may be downloaded, one of which may control the unanticipated INC. Other software objects may be used to control other INCs, or to perform other MPN functions. In step <b>850,</b> a software extension, such as a plug-in, may be provided to the software application. In step <b>860,</b> the user may be allowed to configure the new INC and the downloaded software object, using the software application and the software extension.

0118Flow chart <b>900</b> of <figref idref="f0014">FIG. <b>9</b></figref> shows an illustrative process for downloading data to control an INC. All steps are optional and may be performed in any suitable order. In step <b>910,</b> software may be downloaded. In step <b>912,</b> data may be downloaded. In step <b>914,</b> setup options may be downloaded. In step <b>916,</b> the current time may be downloaded. If desired, other suitable types of data may be downloaded as well.

0119In step <b>920,</b> data may be downloaded over a network, such as the Internet. For example, software or other data may be downloaded from an Internet site into a personal computer. In step <b>922,</b> data may be downloaded from a computer, such as a personal computer. In step <b>924,</b> data may be downloaded from a base station. A base station may be a stationary device that communicates with one or more INCs. The base station may be independent, or it may be connected to a personal computer. In step <b>930,</b> the data may be downloaded into the INC to be controlled. In step <b>932,</b> the data may be downloaded into a control unit. The control unit may be an INC configured with a processor and memory to control aspects of other INCs in the MPN. The control unit may send information or commands to the INC in step <b>934.</b> In step <b>940,</b> the downloaded data may be used to modify one or more functions of the INC.

0120Software and other data may also be downloaded, for example into a control unit, to coordinate the functions of multiple INCs.

0121<figref idref="f0015">FIG. <b>10</b></figref> shows how two MPNs <b>1000</b> and <b>1050</b> may interact. First MPN <b>1000</b> may include audio output INC <b>1010,</b> display INC <b>1012,</b> control unit <b>1014,</b> and accelerometer <b>1016.</b> Second MPN <b>1050</b> may include display <b>1060,</b> heart rate sensor <b>1062,</b> and control unit <b>1064.</b> Any of the INCs of either MPN may send a message intended for one or more INCs of the same MPN. The INCs of the other MPN may need to ignore the message. For example, control unit <b>1014</b> may send data to display <b>1012</b> to be displayed. Display <b>1060</b> will ignore the message, because it did not originate within second MPN <b>1050.</b> Similarly, heart rate monitor <b>1062</b> may send heart rate data to control unit <b>1064</b> for processing. Control unit <b>1014</b> will ignore the data, as it did not originate within first MPN <b>1000.</b> The configuration of these two MPNs is merely illustrative, and all INCs are optional.

0122<figref idref="f0016">FIG. <b>11</b></figref> shows illustrative partial MPN <b>1100,</b> illustrating how an INC <b>1130</b> may be programmed with a common network identifier using a base station <b>1110.</b> Base station <b>1110</b> may be a personal computer, a card installed in a personal computer, a docking station connected to a personal computer over a connection such as USB, a standalone device, or any other suitable configuration. Base station <b>1110</b> may include memory <b>1120,</b> which may be random access memory, a hard disk, or other suitable memory. Base station <b>1110</b> may also include communications device <b>1112,</b> which may be a wireless communications device similar to the communications device in each of the other INCs, or may be any other wired or wireless connection.

0123Memory <b>1120</b> may be used to hold a common network identifier to be used within all INCs of a single MPN. It may also be used to hold information about the various INCs that have been configured using base station <b>1110.</b>

0124INC <b>1130</b> may be a new INC, which has not yet been assigned a network identifier. Alternatively, it may already have been assigned a network identifier, which may be stored in secure memory <b>1140.</b> Secure memory <b>1140</b> may be memory that can only be read or written by INC <b>1130,</b> and cannot be accessed without a security code.

0125A user of base station <b>1110</b> may indicate that INC <b>1130</b> is to be programmed with the base station's network identifier. The user may make this indication by, for example, bringing INC <b>1130</b> into proximity of base station <b>1110,</b> making a physical connection between base station <b>1110</b> and INC <b>1130,</b> pressing a button on base station <b>1110,</b> making a menu selection on base station <b>1110</b> (for example, if base station <b>1110</b> is a personal computer or is connected to a personal computer), or by taking other suitable actions. The user may also be required to enter a personal code, or to invoke other security measures to ensure his or her proper identity. Base station <b>1110</b> may then send a message to INC <b>1130</b> with the new common network identifier and the proper security code. If INC <b>1130</b> is a new INC, it may store the security code and the network identifier in secure memory <b>1140.</b> If it has previously been programmed with a network identifier, it may compare its stored security code with the security code it just received, and if they match may store the new network identifier.

0126If desired, INC <b>1130</b> may also incorporate an algorithm to prevent a large number of consecutive attempts at changing the network identifier. For example, if INC <b>1130</b> receives more than three unsuccessful attempts to change the network identifier within a ten-minute period, it may lock out any further attempts for the next thirty minutes.

0127Using this configuration a user may assign any new INC into his or her MPN. A user may also move an INC from one MPN to another, but only with the authorization of the original owner of the INC.

0128<figref idref="f0017">FIG. <b>12</b></figref> shows illustrative screen <b>1200</b> that may be shown by base station <b>1110</b> (<figref idref="f0016">FIG. <b>11</b></figref>) or personal computer to allow an INC <b>1130</b> to be personalized with the user's network identifier. The user may be allowed to enter a security code in screen region <b>1210.</b> When the security code has been verified, and the security code and network identifier have been successfully sent to the INC <b>1130,</b> the system may display overlay <b>1220.</b>

0129<figref idref="f0017">FIG. <b>13</b></figref> shows illustrative screen <b>1300</b> that may be shown by base station <b>1110</b> (<figref idref="f0016">FIG. <b>11</b></figref>) or personal computer to allow INC <b>1130</b> to be programmed with a different network identifier when it already has a network identifier stored in secure memory <b>1140.</b> The user may be prompted for a security code in screen region <b>1310,</b> as well as the old security code used to program INC <b>1130</b> with the previous network identifier in region <b>1320.</b> When the security codes have been verified, and the security code and network identifier have been successfully sent to the INC <b>1130,</b> the system may display overlay <b>1330.</b>

0130These screens are purely illustrative and may be configured and designed in any suitable manner.

0131<figref idref="f0018">FIG. <b>14</b></figref> shows flow chart <b>1400</b> of an illustrative process to use a common network identifier among INCs in an MPN. All steps are optional and may be performed in any suitable order. In step <b>1410,</b> each INC may be programmed with a common network identifier. This may be done with a base station, personal computer, or other device. The programming may use appropriate security to ensure that an unauthorized user cannot reprogram the network identifier in any INC.

0132In step <b>1420,</b> any messages sent from a first INC in the MPN to a second INC in the same MPN may contain the network identifier stored within the first INC. The second INC, on receiving the message, may compare the network identifier within the message to the network identifier stored in the secure memory in the second INC. If the two identifiers are different, the message may be ignored. If the two identifiers are the same, the second INC may assume that the message originated from an INC within the same MPN, and may process the message if appropriate.

0133In step <b>1430,</b> an INC may be moved from one MPN to another. This may involve changing the network identifier stored in the INC to a new value. To do this may require explicit authorization from a user, in substep <b>1432.</b> It may also require the entry of a password or code or another security measure to ensure that the user is authorized to make the change, in substep <b>1434.</b>

0134<figref idref="f0019">FIG. <b>15</b></figref> shows extended MPN <b>1500.</b> This block diagram shows how an MPN may interface with other systems. MPN <b>1500</b> may include control unit <b>1510.</b> The use of control unit <b>1510</b> is merely illustrative. Any other suitable INC may be used. Control unit <b>1510</b> may include wireless communications device <b>1512</b> for communicating over wireless communications paths <b>1546</b> and <b>1547</b> with other INCs within the MPN. Control unit <b>1510</b> may also include one or more other functions <b>1514,</b> which may include a processor and memory for controlling other INCs in the MPN. MPN <b>1500</b> may also include INCs <b>1520</b> and <b>1530.</b> These INCs may include wireless communications devices <b>1522</b> and <b>1532,</b> respectively. Each may include one or more other functions <b>1524</b> and <b>1534,</b> respectively.

0135Control unit <b>1510,</b> and other INCs, may communicate over communication path <b>1545</b> with base station <b>1540.</b> As shown, communications path <b>1545</b> may be a wireless communications path. Alternatively, base station <b>1540</b> may communication with one or more INCs using any suitable wired path. Base station <b>1540</b> may include communications device <b>1542</b> for communicating with control unit <b>1510</b> and other INCs, and a second communications device <b>1544</b> for communicating over communication path <b>1555</b> with personal computer <b>1550.</b> If desired, communications device <b>1542</b> and communications device <b>1544</b> may be the same device. Communications device <b>1544</b> may communicate with communications device <b>1556</b> on personal computer <b>1550</b> using any suitable physical and logical protocol. This may include a serial port, USB, infrared, radio frequency, a docking station, or other means.

0136In addition to communications device <b>1556,</b> personal computer <b>1550</b> may have display <b>1552,</b> keyboard <b>1553,</b> mouse, printer <b>1554,</b> and modem <b>1551.</b> Modem <b>1551</b> may be any suitable type of connection to a wide area network, and may include a telephone modem, a digital subscriber line modem, a cable modem, an Ethernet hub, and Ethernet router, or other suitable equipment. Personal computer <b>1550</b> may connect using path <b>1565</b> to wide area communications network <b>1560,</b> which may be the Internet. Personal computer <b>1550</b> may be configured to send or receive information from another computer using wide area network <b>1560.</b>

0137<figref idref="f0020">FIG. <b>16</b></figref> shows flow chart <b>1600</b> of an illustrative process for uploading information from an INC. All steps are optional and may be performed in any suitable order. In step <b>1610,</b> information may be reported by an INC. That information may have been collected by the INC, for example using a sensor within the INC. Alternatively, the information may have been generated by the INC. In step <b>1615,</b> the information may be received by a control unit, which may be another INC within the same MPN. The information may be sent from the control unit, or any other suitable INC, to a base station in step <b>1620,</b> and to a personal computer in step <b>1622.</b> If desired, any of the control unit, base station, and personal computer may be omitted, or their functions may be combined in any suitable manner. If desired, the collected information may be sent over a communications network, such as the Internet, in step <b>1624,</b> and received by another computer.

0138In step <b>1630,</b> the information may be stored, for example by the base station, the personal computer, or by another computer accessed over the communications network. The information may be displayed for a user. The information may be analyzed, in step <b>1632.</b> In step <b>1640,</b> the uploaded information may be used, at least in part, to create information to download. This derived information may be downloaded to the same INC that originated the uploaded data, to the control unit, or to another INC in the MPN. Refer to the description of <figref idref="f0014">FIG. <b>9</b></figref> above for steps related to downloading of data.

0139<figref idref="f0021">FIG. <b>17</b></figref> shows a more detailed block diagram <b>1700</b> of a portion of MPN <b>1500</b> of <figref idref="f0019">FIG. <b>15</b></figref><b>.</b> Base station <b>1540,</b> control unit <b>1510,</b> and INC <b>1520</b> are shown. It can be seen that control unit <b>1510</b> includes processor <b>1742</b> and memory <b>1744.</b> INC <b>1720,</b> which is an audio output INC, is also shown. Audio output INC <b>1720</b> include wireless communications device <b>1722</b> for communicating over wireless communication path <b>1730</b> with control unit <b>1510</b> and other INCs. Audio output INC <b>1720</b> also includes digital-to-analog converter <b>1724,</b> for converting digital audio data to an analog audio signal, and speaker <b>1726</b> for playing the analog audio signal audibly. The INCs shown are merely illustrative.

0140<figref idref="f0022">FIG. <b>18</b></figref> shows flow chart <b>1800</b> of illustrative process for using an INC that is a control unit in an MPN. All steps are optional and may be performed in any suitable order. In step <b>1810,</b> the control unit may be configured to be worn. It may be attached, for example, to a waistband, a wristband, an armband, or other worn in another suitable location. If desired, the control unit may alternatively be carried, mounted on personal equipment, or otherwise associated with the user. Information may be downloaded to the control unit, for example from a base station or personal computer. In step <b>1820,</b> software may be downloaded to the control unit. In step <b>1822,</b> data may be downloaded to the control unit. In step <b>1824,</b> configuration parameters may be downloaded to the control unit. In step <b>1826,</b> the date and/or time may be downloaded to the control unit.

0141In step <b>1830,</b> data may be sent from the control unit to another INC within the MPN. For example, any of the data sent to the control unit in steps <b>1820, 1822, 1824,</b> or <b>1826</b> may be sent to another INC. The control unit may also send information to another INC that is derived from downloaded data, from data collected from other INCs, or other suitable data.

0142In step <b>1832,</b> the control unit may control a function of another INC. The control unit may accomplish this by sending one or more messages to the other INC, and possibly by receiving messages in response. The control may be based on downloaded software, downloaded data, downloaded parameters, time, or any derived data.

0143In step <b>1834,</b> the control unit may collect data from another INC. The control unit may request the data by sending a message to the other INC. Alternatively, the other INC may send the data unsolicited. The data may be a single item, or it may consist of several samples collected over a period of time. The control unit may process the data, combine data samples, combine data from multiple INCs, or otherwise modify the collected data. In step <b>1850,</b> data may be uploaded from the control unit, for example to a base station or personal computer. This may included collected data, derived data, or data generated by the control unit.

0144In step <b>1860,</b> functions of the control unit may be integrated with other functions. For example, the control unit may also have a display or a user input device. The control unit may also include clock functions, in step <b>1840,</b> and it may track time to coordinate functions of the MPN, to schedule actions, and to tag collected data. The control unit may treat the other integrated functions as though they were in another INC, without the need to send and receive wireless messages to communicate with them.

0145In step <b>1870,</b> the control unit may support multiple other INCs with multiple functions. Some may be input INCs, some may be output INCs, and some may be a combination. Some INCs may be wholly contained without external input or output, such as a storage INC or a data processing INC. The control unit may maintain a table of active INCs, and communicate with the other INCs as required. The control unit may automatically detect when an INC is added to the MPN or removed from the MPN. When an INC is added to the MPN, the control unit may ignore it until it receives downloaded software or data related to the new INC. Alternatively, it may automatically make use of the capabilities of the new INC. When a INC is removed from the MPN, the control unit may wait for a period of time to make sure that communications with the INC were not temporarily lost. The control unit may continue functioning with reduced functions. In addition or alternatively it may generate an alert to the user.

0146If desired, an MPN need not include a control unit. Some or all of the functions of a control unit may be incorporated into one or more of the other INCs. If desired, each INC may provide its own control. If desired, software, data, configuration settings, and other information may be downloaded directly into some or all of the INCs by a base station or personal computer prior to mobile use.

0147<figref idref="f0023">FIG. <b>19</b></figref> shows flow chart <b>1900</b> of an illustrative process for providing personal INCs in an MPN. All steps are optional and may be performed in any suitable order. In step 1910, the user may wear an INC. For example, in substep <b>1912,</b> the user may wear an INC on a hand, wrist, arm, leg, foot, waist, head, or other suitable part of the body. The INC may be worn on an article of clothing in substep <b>1914,</b> such as a glove, a partial glove, a wristband, an armband, a hat, a headband, a shirt, a waistband, a shoe, or other suitable item of clothing.

0148In step <b>1920,</b> the INC may be mounted on personal equipment that may be used by the user. For example, in substep <b>1922,</b> the INC may be mounted on a bicycle, a car, a piece of exercise equipment, or other suitable personal equipment. The INC may provide an input or output function associated with the personal equipment.

0149In step <b>1930,</b> the MPN may also include a relatively stationary INC, such as a base station or personal computer. The base station or personal computer may function as part of the MPN while the user is in proximity to the device. The communications connection with the stationary device may be the same wireless network used to communicate between the INCs, or it may be another type of connection. The other type of communication may be a docking station or other fixed method, USB or other wired method, or infrared or other wireless method. The stationary device may only support communications with one of the mobile INCs, such as a control unit, or it may support communications with several or substantially all of the INCs.

0150<figref idref="f0024 f0025 f0026">FIGs. <b>20A</b> through <b>20C</b></figref> show several illustrative methods for mounting INCs. For example, <figref idref="f0024">FIG. <b>20A</b></figref> shows some options for allowing a user <b>2005</b> to wear INCs. INC <b>2012,</b> which may be an audio output INC, may be mounted on headband <b>2010.</b> INC <b>2022,</b> which may be a display, may be mounted on wristband <b>2020.</b> INC <b>2032,</b> which may be a user control, may be mounted on glove <b>2030.</b> INC <b>2042,</b> which may be a control unit, may be mounted on waistband <b>2040.</b> INC <b>2052,</b> which may be an accelerometer, may be mounted on shoe <b>2050.</b> These INCs and options for wearing are merely illustrative. Other options may be used if desired. The user <b>2005</b> may decide what functions will be provided simply by choosing to wear a specific set of INCs at any given time.

0151<figref idref="f0025">FIG. <b>20B</b></figref> shows some options for mounting INCs on a piece of exercise equipment <b>2070.</b> For example, INC <b>2074</b> may be an input sensor to read data associated with the exercise equipment, or may be an output INC to control aspects of the exercise equipment. INC <b>2072</b> may be a display INC, or may be configured to communicate with a processor embedded within the exercise equipment. These INCs may function as part of the MPN when the user is on or near the device.

0152<figref idref="f0026">FIG. <b>20C</b></figref> shows options for mounting INCs on a bicycle <b>2060.</b> For example, INC <b>2062</b> may be a display INC. INC <b>2064</b> may be a sensor for measuring pedaling cadence. INC <b>2066</b> may be a sensor for measuring wheel speed. These INCs may function as part of the MPN when the user is on or near the bicycle.

0153The options shown in <figref idref="f0024 f0025 f0026">FIGs. <b>20A</b> through <b>20C</b></figref> are merely illustrative. Other types of INCs, other types of mounting, and other types of personal equipment may be supported if desired.

0154<figref idref="f0027">FIG. <b>21</b></figref> shows flow chart <b>2100</b> of an illustrative process for using an INC mounted on a piece of exercise equipment. All steps are optional and may be performed in any suitable order. In step <b>2110,</b> the INC may be mounted on a piece of exercise equipment. In substep <b>2112,</b> the INC may be mounted on a bicycle. The INC may function as part of the user's MPN when the user is near or on the exercise equipment. In step <b>2120,</b> control commands may be sent to the INC mounted on the exercise equipment. The INC may control the function of the exercise equipment directly, or it may send a command to the exercise equipment, for example using a serial port or radio frequency transmitter. As shown in substep <b>2122,</b> the command may be to control the difficulty of the exercise, such as by changing a resistance setting, a speed setting, a slope setting, or the like. The control command may also be to a display INC or other user output INC mounted on the exercise equipment. In step <b>2130,</b> data may be collected from the INC. The INC may measure the collected data directly, or it may retrieve the data from the exercise equipment, for example using a serial port or radio frequency receiver. The data may be, for example, pedal speed of a bicycle in substep <b>2132</b> or wheel speed of a bicycle in substep <b>2134.</b> In substep <b>2136,</b> other performance information may be collected from the exercise equipment, such as speed, power, or heart rate. The data may be collected, for example, using a sensor attached to the exercise equipment or bicycle, or by communicating with a processor embedded in the exercise equipment. The collected data may be stored, it may be displayed, and it may be used to modify a workout. If desired, the collected data may be uploaded to a base station or personal computer, where it may be stored, displayed, or analyzed.

0155An INC may function as a display INC. A display INC may be worn or carried by the user or mounted on a piece of personal equipment. A display INC may be combined with other functions, such as user controls, audio output, or a control unit, or the INC may function solely as a display INC. A single display INC may be used to display different types of information at different times, depending on the other INCs in the MPN. The display INC may not need to be changed to provide new types of information display. Rather this may be accomplished by adding a new INC with a new function, downloading new software into the display INC or a control unit, or otherwise modifying other parts of the MPN. In addition, the user may switch to a different style of display INC without changing any other part of the MPN, and maintain all preexisting MPN settings and functions.

0156The display INC may include a wireless communications device for communicating with other INCs in the MPN. For example, the display INC may receive display commands and data from one of the other INCs, such as a control unit. The display INC may incorporate any appropriate display technology, such as liquid crystal displays (LCDs), light emitting diodes (LEDs), etc. It may also include means for mounting the INC to the user's body. If desired, a display INC may accept different types of input for display, such as text, bit-map or other graphics, video data, instructions to turn on or off specific visual indicators, instructions to turn on or off various display modes, or other suitable display items and instructions.

0157In a mounting similar to a wristwatch, a display INC <b>2215</b> may be mounted on the back of a wrist <b>2210,</b> using wristband <b>2220,</b> as shown in <figref idref="f0028">FIG. <b>22A.</b> FIG. <b>22B</b></figref> shows a variation, in which display INC <b>2235</b> is mounted on the side of wrist <b>2230,</b> using wristband <b>2240.</b> In another variation shown in <figref idref="f0029">FIG. <b>22C</b></figref><b>,</b> display INC <b>2255</b> may be mounted on the back of hand <b>2250</b> using partial glove <b>2260.</b> In these examples, the display INCs are shown to display time. However, any suitable information appropriate to the functions provided by the INCs of the MPN may be shown on the display INC.

0158<figref idref="f0030 f0031">FIGs. <b>23A</b> through <b>23F</b></figref> show how a display INC may be worn on the side of a hand, and may be configured with various orientations. For example, in <figref idref="f0030">FIGs. <b>23A</b> through <b>23C</b></figref><b>,</b> the display INC may be configured to be oriented toward the back of the hand, toward the fingertips, or at an angle between them, respectively. In these FIGs., the display is shown on the left hand. Alternatively, the display may be configured to be worn on the right hand, as shown in <figref idref="f0031">FIGs. <b>23D</b> through <b>23F</b></figref><b>.</b> Different users with different needs may desire displays worn on opposite hands, in different positions on the hand or wrist, and at different orientations. Some, for example, may wish to wear the display in the traditional wristwatch position and orientation on the back of the wrist. Others, for example athletes, may desire a display that can be quickly viewed on the side of the hand without having to twist the arm. The preferred orientation may depend on the user's activity.

0159A display may be provided in which the user may configure the position and/or orientation. For example, a user may wish to switch the display between the left wrist/hand and the right wrist/hand. A user may also be allowed to change the orientation of the display. For example, if the display is implemented using a dot-matrix liquid crystal display (LCD), the software within the MPN may support multiple orientations. A display may also be provided with multiple mounts - e.g., wristbands, partial gloves, and the like.

0160<figref idref="f0032">FIG. <b>24A</b></figref> shows flow chart <b>2400</b> of an illustrative process for providing a display as an INC in an MPN. All steps are optional and may be performed in any suitable order. In step <b>2410,</b> a display may be provided as an INC. The INC may include a wireless communications device for communicating with other INCs in the MPN. If desired, the display may be combined with one or more other functions into a single INC, sharing a single wireless communications device. In step <b>2415,</b> the display INC may be configured to be worn, for example on a wristband, partial glove, or the like. In step <b>2420,</b> the display INC may be configured to be mounted on an item of personal equipment. That may include, for example, a car in substep <b>2424,</b> a bicycle in substep <b>2422,</b> or a piece of exercise equipment in substep <b>2426.</b> In step <b>2430,</b> the user may be allowed to change the mounting of the display INC. For example, multiple mounts may be provided so that the display INC may be moved from one part of the body to another, or from the wrist to a piece of exercise equipment.

0161<figref idref="f0033">FIG. <b>24B</b></figref> shows a flow chart with illustrative expanded detailed of step <b>2415,</b> in which the display INC may be worn by the user. All steps are optional and may be performed in any suitable order. In step <b>2460,</b> the display may be configured to be worn on a hand or wrist. For example, a wristband or partial glove may be provided. If desired, the display may be worn on other parts of the body instead of the hand or wrist. In step <b>2465,</b> the display may be configured to be worn on the side of the hand or wrist, allowing the display to be viewed more easily, for example by an athlete. In step <b>2470,</b> the display and mount may be configured to allow the display to be worn on either the left or right hand or wrist.

0162In step <b>2480,</b> the display may be oriented in a direction desirable to the user. For example, in substep <b>2482,</b> the display may be oriented toward the fingertips. In substep <b>2484,</b> the display may be oriented toward the back of the hand or wrist. In substep <b>2486,</b> the display may be oriented at an angle between those two options. In step <b>2490,</b> the orientation of the display may be configurable by a user, allowing the user to select from one or more orientation options.

0163<figref idref="f0034">FIG. <b>25</b></figref> shows illustrative flow chart <b>2500</b> of an illustrative process for providing a reusable wearable mount that may be used with various INCs, such as a display INC. This method may allow the user to use different mounts or displays to match clothing, to use displays with different functions, and to quickly and easily change the position and orientation of the display.

0164All steps are optional and may be performed in any suitable order. In step <b>2510,</b> a reusable mount may be provided that may be worn on the user's body. In step <b>2515,</b> the mount may be provided as part of an article of clothing, such as a glove, partial glove, wristband, waistband, shirt, or any other suitable article of clothing. In step <b>2520,</b> the mount may use a hook and loop type of fastener. If desired, any other suitable type of fastener may be used on the article of clothing. In step <b>2525,</b> the mount may be made directly to the user's skin. For example, a non-toxic adhesive may be used on the back of the INC to be mounted.

0165In step <b>2530,</b> a plurality of mounts may be provided. For example, in substep <b>2532,</b> mounts may be manufactured in different styles or colors. In substep <b>2534,</b> mounts may be manufactured to be worn on different parts of the body. A user may choose one of the mounts based on style, whim, convenience, function, or for any other reason.

0166In step <b>2540,</b> the mount may be used with an INC. The user may temporarily attach the INC to the mount. If desired, the mount may also be configured to allow devices that are not INCs to be attached. In step <b>2545,</b> the INC attached to the mount may be a display INC. The display INC may be used to display current time and other information that may be provided by the MPN. In step <b>2550,</b> the user may be allowed to reposition the INC on the mount. For example, the user may be allowed to change the placement and orientation of a display INC to make it more convenient to read the displayed information. In step <b>2560,</b> the user may be allowed to mount various INCs onto a single mount. The INCs may be manufactured with different shapes, materials, colors, styles, functions, or otherwise may be of different value to a user at different times.

0167<figref idref="f0035 f0036">FIGs. <b>26A</b> through <b>26C</b></figref> show various examples of reconfigurable wearable mounts that may be provided. <figref idref="f0035">FIG. <b>26A</b></figref> shows a wristband with a buckle. <figref idref="f0035">FIG. <b>26B</b></figref> shows a partial glove. <figref idref="f0036">FIG. <b>26C</b></figref> shows a stretchable band that may be looped around the hand and over the thumb. Each of these mounts may be manufactured with an area of hook and loop fasteners, where the mount includes, for example, the hook portion, and the loop portion is on the back of the INC to be mounted.

0168<figref idref="f0037">FIGs. <b>27A</b> through <b>27D</b></figref> show various display INCs that may be used with the mounts of <figref idref="f0035 f0036">FIGs. <b>26A</b> through <b>26C</b></figref><b>.</b> These displays may have different shapes, different materials, different functions (for example showing either time or heart rate), or may otherwise differ. Each of the INCs may provide the means to fasten to the mount, for example the loop portion of a hook and loop fastener.

0169An INC may function as an audio output INC. An audio output INC may be worn or carried by the user or mounted on a piece of personal equipment. The audio output INC may be combined with other functions, such as user controls, display, or a control unit, or the INC may function solely as an audio output INC. A single audio output INC may be used to output different types of information at different times, depending on the other INCs in the MPN. The audio output INC may not need to be changed to provide new types of information output. Rather this may be accomplished by adding a new INC with a new function, downloading new software into the audio output INC or a control unit, or otherwise modifying other parts of the MPN. In addition, the user may switch to a different style of audio output INC without changing any other part of the MPN, and maintain all preexisting MPN functions.

0170The audio output INC may include a wireless communications device for communicating with other INCs in the MPN. For example, the audio output INC may receive digital audio data from one of the other INCs, such as a control unit. The audio output INC may include a digital-to-analog converter (DAC) for converting the digital audio data to an analog audio signal. Alternatively, the audio output INC may receive an analog audio signal from another INC. It may include one or more amplifiers and one or more speakers. It may also include means for mounting the INC to the user's body. If desired, the audio output INC may also include more advanced audio processing capabilities, including speech synthesis, recognition of various audio file formats, decryption of secure data formats, the ability to generate any of a predefined set of tones or audio segments, or other suitable circuits and algorithms.

0171<figref idref="f0038 f0039">FIGs. <b>28A</b> through <b>28D</b></figref> show various types of audio output INC that may be used with an MPN. <figref idref="f0038">FIG. <b>28A</b></figref> shows an audio output INC configured as a pair of headphones <b>2810.</b> It may include two speakers <b>2812</b> and <b>2814.</b> A wireless communications device, DAC, and amplifiers may also be included. The headphones may also be configured as two separate INCs, which may each communicate wirelessly with control unit and other INCs. Each INC may have its own DAC, amplifier, and speaker. Headphones may be provided with connecting bar, or they may be configured as small modules to be inserted inside the ear and worn independently.

0172<figref idref="f0038">FIG. <b>28B</b></figref> shows audio output INC <b>2822</b> that may be configured to be worn with a headband <b>2820.</b> The audio output INC may be worn near the ear so that minimal power is needed to drive its speaker. Sound from the speaker may be provided via conduction through the skull. <figref idref="f0039">FIG. <b>28C</b></figref> shows two independent audio output INCs <b>2832</b> and <b>2834,</b> which may be worn with a headband <b>2830,</b> to provide stereo sound. In <figref idref="f0039">FIG. <b>28D</b></figref><b>,</b> audio output INC <b>2844</b> may be configured to be worn with hat <b>2840.</b> If desired, hat <b>2840</b> may be configured to function with two audio output INCs (not shown). The audio output INC of <figref idref="f0038 f0039">FIGs. <b>28B</b> through <b>28D</b></figref> may be configured to fit into the ear, or to lie flat across the skin near the ear. The headband or hat may be designed to hold the audio output INC or INCs in place in the ear, or to hold the audio output INC in place against the skin where sound may be conducted through the skull. If desired, the headband or hat and the audio output INC may be jointly designed so that the audio output INC may be repositioned to best meet the user's needs, and so that alternate designs of audio output INCs may be used with the same mount.

0173<figref idref="f0040">FIG. <b>29</b></figref> shows flow chart <b>2900</b> of an illustrative process for providing an audio output INC in an MPN. All steps are optional and may be performed in any suitable order. In step <b>2910</b> an audio output INC may be provided. Audio output INC may include a wireless communications device for receiving audio data and other audio commands from one or more other INCs in the MPN. It may include DAC, one or more amplifiers, and one or more speakers. It may also include speech synthesis circuitry, tone generation circuitry, digital audio file processing capability, decryption circuitry, a library of audio segments, or other suitable subsystems.

0174In step <b>2920,</b> the audio output INC may be configured to be worn. For example, in substep <b>2922,</b> it may be configured as a headset. In substep <b>2924,</b> it may be configured as one or more independent earphones, for example to be inserted inside an ear. In substep <b>2926,</b> it may be configured to be worn with a hat. In substep <b>2928,</b> it may be configured to be worn with a headband. In step <b>2930,</b> the audio output INC may include one or more speakers. For example, it may be configured to provide stereo sound. Alternatively, multiple audio output INCs may be included as separate INCs in a single MPN, and may be controlled independently.

0175In step <b>2932,</b> audio output INC may provide music. Music may be provided in stereo. In step <b>2934,</b> synthesized voice may be provided. The synthesized voice may be provided to the audio output INC as digital or analog audio. Alternatively, the voice may be provided to the INC in another form, such as text or phonemes, and the audio output INC may create the synthesized voice. In step <b>2936,</b> tones may be output. The tones may be provided to the audio output INC as digital or analog audio. Alternatively, the tones may be provided to the INC in another form, such as waveform descriptions or indexes into a table of predefined audio segments, and the audio output INC may create the tones.

0176In step <b>2940,</b> the audio output INC may be used by the MPN to provide audio cues to the user. The audio cues may be for any purpose appropriate to the functions provided by the MPN and its other INCs. For example, cues may be provided to an athlete with performance information <b>2941,</b> workout zone information <b>2942,</b> workout prompt <b>2943,</b> or change intensity prompt <b>2944.</b> Route prompt <b>2945</b> or direction alert <b>2947</b> may be provided by an MPN that provides route guidance. Medical alert <b>2946</b> may be provided by an MPN that monitors medical conditions. Communication alert (e.g., notification of an incoming telephone call or message) <b>2948</b> and voice communication <b>2949</b> may be provided by an MPN that provides communication services.

0177In step <b>2950,</b> sound may be used to indicate different conditions or different audio cues. For example, in substep <b>2952,</b> different sounds (e.g., different tones) may be used to indicate different conditions. In substep <b>2954,</b> different sound sequences may be used to indicate different conditions. In substep <b>2956,</b> sound may be sent to different speakers or audio output INCs to indicate different conditions.

0178In step <b>2960,</b> the audio output INC may be used for multiple purposes simultaneously. For example, in a system that provides both music and audible athletic workout feedback, both may be sent to the same audio output INC or INCs. When an audio cue, such as workout feedback, is output, the music may be muted in substep <b>2962</b> or the volume of the music may be lowered in substep <b>2964.</b> Alternatively, the music may be paused in substep <b>2966</b> while the audio cue is presented. The volume changing or pausing of the music may be controlled, for example, by a control unit. For example, the control unit may send both music and audio cues to the audio output INC, and may send commands to the audio output INC to control the volume of both. To pause the music, which may be stored in digital form in memory in the control unit, the control unit may temporarily stop reading music data from its memory while the audio cue is presented, and then resume reading the music data from where it was left off. If desired, the pausing, muting, or volume reduction of the music itself may constitute the audio cue, with no additional sound generated. For example, the system may pause the music once for two seconds as one type of cue, and pause the music three times for one half second each time as a second type of cue.

0179In step <b>2970,</b> an audio output INC may be provided separately from a display INC. This may be an advantage over many existing systems in which these two functions are combined into a single unit worn on the wrist. In these prior art devices, either the sound volume is so loud that it disturbs other nearby people, or it is too soft to be heard by the user at all times. In this invention, the audio output INC can be provided close to the ear, and the volume can be kept low while still allowing the user to hear the audio even in poor environmental conditions. If desired, the MPN may include the ability for a user to control the volume of audio output. The system may also allow a user to independently control the volume of different types of audio output. For example, the volume of the music may be controlled separately from the volume of the audio cues, and both of those may be controlled separately from the volume of voice communications.

0180In substep <b>2975,</b> cues may be sent to either the audio output INC as audio cues, or to the display INC as visual cues, or both. The user may be allowed to configure where different types of cues are sent.

0181An INC may function as a user input INC. A user input INC may be worn or carried by the user or mounted on a piece of personal equipment. The user input INC may be combined with other functions, such as a display or control unit, or the INC may function solely as a user input INC. A single user input INC may be used to input different types of information at different times, depending on the other INCs in the MPN. The user input INC may not need to be changed to provide new types of information input. Rather this may be accomplished by adding a new INC with a new function, downloading new software into the user input INC or a control unit, or otherwise modifying other parts of the MPN. In addition, the user may switch to a different style of user input INC without changing any other part of the MPN, and maintain all preexisting MPN functions. An MPN may include multiple user input INCs, which may be of similar types or of different types.

0182The user input INC may include a wireless communications device for communicating with other INCs in the MPN. For example, the user input INC may send digital commands or data to one of the other INCs, such as a control unit. The user input INC may include an analog-to-digital converter (ADC) for converting analog inputs to digital data. It may also include means for mounting the INC to the user's body. If desired, the user input INC may also include more advanced input processing capabilities, including voice recognition, tensile, audible, or visual feedback of input commands, anticipation of likely commands, grouping and combining of similar inputs, or other suitable circuits and algorithms.

0183<figref idref="f0041">FIG. <b>30</b></figref> shows flow chart <b>3000</b> of an illustrative process for providing a user input INC in an MPN. All steps are optional and may be performed in any suitable order. In step <b>3010,</b> a user input INC may be provided. In step <b>3020,</b> the user input INC may be separate from other INCs, such as a display INC or a control unit. This may be an advantage to some users. For example, in many prior art systems the user controls are mounted on a display device worn on the wrist. Controls may be small and close together, and may require the user to look at the display device to operate it. This requires to user to twist the arm, to look and find the controls, and to reach one hand over to the other. These actions may not be convenient for all users at all times. For example, an athlete may need to operate a system using the minimum possible motions, and without having to change the direction he or she is looking. If desired, user controls may be combined with any other INC.

0184In step <b>3020,</b> any suitable type of user input INC may be used. Preferably, the INC is one that may be used in a mobile environment. For example, a computer keyboard and mouse may not be appropriate except as attached to a personal computer or base station that may be used at times with the MPN. Appropriate types of input INC may include a pressure sensor or button <b>3021,</b> multiple pressure sensors or buttons <b>3022,</b> a touch pad <b>3023,</b> a stylus <b>3024</b> used for example with a touch pad, a portable keyboard <b>3025,</b> and a microphone <b>3026.</b> Microphone <b>3026</b> may be used to capture audio data, or it may include speech recognition circuitry. If desired, an MPN may include multiple user input INCs. For example, one system may include several buttons, a microphone with speech recognition, and a touch pad with a stylus.

0185In step <b>3030,</b> the user input INC may be configured to be worn or carried. For example, a pressure sensor may be attached to a fingertip <b>3032,</b> hand <b>3031,</b> foot <b>3035,</b> or waist <b>3034.</b> A touch pad or microphone may be worn at the waist <b>3034.</b> A microphone may be worn on the wrist <b>3033</b> or other part of the arm, or may be configured as part of a headset. If desired, the user input INC may be designed to be mounted on an item of clothing in step <b>3040,</b> such as glove <b>3041,</b> partial glove <b>3042,</b> wristband <b>3043,</b> waistband <b>3044,</b> or footband <b>3045,</b> shoe, or sock. The user input INC may also be mounted on an item of personal equipment in step <b>3050,</b> such as on a car <b>3051,</b> bicycle <b>3052,</b> or exercise equipment <b>3053.</b>

0186In step <b>3060,</b> if user input INC includes one or more pressure sensors or buttons, it may be operated by tapping. For example, the user may mount a pressure sensor on one or more fingertips, and they may be operated by tapping the fingertip against the palm of the hand, the thumb, other part of the body, or another surface. The user may mount a pressure sensor on the palm of the hand and operate it by tapping it with a fingertip, with the other hand, hitting another part of the body, or striking another surface. The user may mount a pressure sensor on a waistband and operate it by tapping it. The user may mount a pressure sensor on the foot and operate it by tapping an object with the toe or by pushing off the wall while swimming laps in a swimming pool. In substep <b>3062,</b> the user may tap different sensors for different commands. For example, an athlete may tap with the sensor on one finger to start and stop a stopwatch function, and tap with the sensor on a different finger to capture a single lap split time. In substep <b>3064,</b> the user may tap different sequences to indicate different commands. For example, the user may tap once, twice in quick succession, or other suitable sequences. In substep <b>3066,</b> the user may tap a specific combination of sensors simultaneously to input a specific command.

0187<figref idref="f0042 f0043">FIGs. <b>31A</b> through <b>31C</b></figref> show several illustrative methods for mounting a user input INC. In <figref idref="f0042">FIG. <b>31A</b></figref><b>,</b> pressure sensors <b>3110, 3111, 3112, 3113, 3114,</b> and <b>3120</b> are mounted on a user's hand <b>3100.</b> If desired, they may also be mounted on a glove or partial glove worn by the user. In this configuration, any single sensor may be operated independently. In addition, combinations of sensors may be operated simultaneously. For example, a user may tap the thumb with the forefinger and simultaneously operate both sensor <b>3110</b> and sensor <b>3111.</b> The user may also simultaneously strike a surface with one, two, or more sensors to provide various input commands.

0188<figref idref="f0042">FIG. <b>31B</b></figref> shows pressure sensor <b>3134</b> mounted to a user's foot <b>3130</b> using footband <b>3132.</b> This configuration may be useful to a swimmer, who may tap the wall of a swimming pool to count laps, and may tap the bottom of the pool to indicate other commands.

0189<figref idref="f0043">FIG. <b>31C</b></figref> shows user <b>3140</b> who has mounted two input INCs <b>3144</b> and <b>3146</b> on waistband <b>3142.</b> These input INCs may be pressure sensors and may be operated by tapping. Alternatively, these INCs may include a microphone, portable keyboard, touchpad and stylus, or other input INC carried on the waist and retrieved for use. Any suitable combination of input INCs and mounts may be used.

0190An MPN may be used for many purposes. A single MPN may be used for a single purpose, or it may be used for multiple purposes. The uses of the MPN may change over time, as the user adds and removes INCs, downloads or removes software, changes configuration parameters, or just changes how he or she interacts with the system. A single INC may have a single purpose, or it may be used for multiple purposes. Some types of INCs, such as control units INCs, display INCs, audio output INCs, and user input INCs, may be general purpose.

0191<figref idref="f0044">FIG. <b>32</b></figref> shows a flow chart of an illustrative process for using an MPN for multiple purposes. All steps are optional and may be performed in any suitable order. In step <b>3205,</b> the MPN may be used to provide a time-related function. In step <b>3208,</b> the MPN may be used to provide a guidance function. In step <b>3210,</b> the MPN may be used to provide an athletic function. In step <b>3215,</b> the MPN may be used to provide a medical function. In step <b>3220,</b> the MPN may be used to provide an entertainment function. In step <b>3225,</b> the MPN may be used to provide an outdoor-related function. In step <b>3230,</b> the MPN may be used to provide a communications function. In step <b>3235,</b> the MPN may be used to provide a personal organization function. In step <b>3240,</b> the MPN may be used to provide an identification function. In step <b>3245,</b> the MPN may be used to provide a personal security function. In step <b>3250,</b> the MPN may be used to provide a military function. In step <b>3255,</b> the MPN may be used to provide a physical therapy function. In step <b>3260,</b> the MPN may be used to provide a disability-related function. In step <b>3265,</b> the MPN may be used to provide a travel-related function. In step <b>3270,</b> the MPN may be used to provide multiple functions. This may include substep <b>3272</b> of providing multiple functions with a single MPN configuration. It may also include substep <b>3274</b> of providing multiple functions with multiple MPN configurations. The functions shown in <figref idref="f0044">FIG. <b>32</b></figref> are merely illustrative. Other functions may be provided if desired.

0192Step <b>3205,</b> providing time-related functions, is shown in more detail in <figref idref="f0045">FIG. 33</figref>. All steps are optional and may be performed in any suitable order. In step <b>3310,</b> a clock may be provided as part of an MPN. This may include substep <b>3312</b> in which the clock is provided as part of another INC, such as a control unit or display INC. In step <b>3320,</b> the current date and time may be downloaded into the INC. This may include substep <b>3322</b> in which the current time is downloaded over the wireless network, for example from a personal computer. Alternatively, it may include substep <b>3324</b> in which the INC include a radio receiver to acquire the current time from station WWV time of day radio broadcast.

0193In step <b>3330,</b> the INC may provide a clock function. This may include displaying the current day and time on a display INC. The INC may include a time zone function in step <b>3331.</b> This may include displaying the current time in multiple time zones, or converting a time from one time zone to another. In step <b>3332,</b> the INC may provide a stopwatch function. This may include allowing the user to time individual events. It may include step <b>3334</b> of providing a split timer function, in which the user is allowed to time individual portions of an event. It may also include step <b>3335</b> in which the user is allowed to time multiple events. In step <b>3333,</b> the system may provide an interval timer function, allowing the user to mark one or more recurring intervals of specific durations.

0194In step <b>3340,</b> the system may store collected time information. This may include collected stopwatch, split, and event times. This collected data may be tagged with the date and time on which it was stored. The user may also be allowed to input descriptive data related to the collected time data. The stored data may also include time zone settings, intervals settings, or other settings. In step <b>3342,</b> the collected time information may be uploaded, for example to a base station or personal computer.

0195In step <b>3350,</b> the clock functions may be used to synchronize other MPN functions. For example, a control unit may collect data from a particular INC on a regular interval, or update a display once per second. The control unit may be allowed to read the current time from the clock. The clock may also be configured to provide an unsolicited interrupt to the control unit or other INC at a regular interval. In step 3352, data collected from other INCs may be tagged with the current time retrieved from the clock.

0196<figref idref="f0046">FIG. <b>34</b></figref> shows a block diagram of an illustrative MPN <b>3400</b> with a clock function. In this system, the clock <b>3420</b> is embedded in the control unit <b>3410.</b> Clock information is sent to a separate display INC <b>3430,</b> which may output the information on display <b>3440.</b> User commands, such as changing clock mode and starting and stopping the stopwatch, are provided by buttons <b>3460</b> on a separate input INC <b>3450.</b> The input INC <b>3450</b> may be worn on the hand, the control unit/clock <b>3410</b> may be worn on the waist, and the display INC <b>3440</b> may be worn on the wrist.

0197<figref idref="f0047">FIG. <b>35</b></figref> shows an illustrative screen <b>3500</b> that may be shown on display <b>3440</b> (<figref idref="f0046">FIG. <b>34</b></figref><b>).</b> Mode list <b>3520</b> may list the available clock modes. In this case, the system may support a time mode, a zone mode (e.g., time zone), a stopwatch mode, an interval timer mode, and an event timer mode. Indicator <b>3530</b> may show the currently active mode, in this case the time mode. The user may change to a different mode by pressing one of buttons <b>3460</b> (<figref idref="f0046">FIG. <b>34</b></figref><b>).</b> The current time <b>3510</b> may be displayed while in time mode.

0198More details of step <b>3230</b> (<figref idref="f0044">FIG. <b>32</b></figref><b>),</b> providing a communication function in an MPN, are shown in <figref idref="f0048">FIG. <b>36</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>3610,</b> communication may be provided with another MPN. This may be accomplished if one of the INCs in the MPN includes a communications device capable of communicating with an INC of another MPN. The wireless communications device used for communicating among the INCs within an MPN may also be used for communicating with another MPN, if the user of that MPN is in close proximity. The system may be configured to accept messages with the specific network identifier associated with the other MPN, while the communications are in progress.

0199In step <b>3620,</b> wireless telephone communications may be provided, if one of the INCs includes a wireless telephone. The audio output INC for the MPN may output the incoming audio from a telephone call, and a microphone used as a user input INC for the MPN may be used to provide the outgoing audio for the telephone call. This allows the telephone INC itself to be smaller and less costly, since it does not require a built-in speaker or microphone.

0200In step <b>3625,</b> paging services may be provided. For example, one of the INCs may include a paging receiver. Text pages may be shown on the display INC. Audio alerts and voice pages may be sent to the audio output INC. Two-way paging may be provided if desired. An instant messaging function may be provided in step <b>3630,</b> with one INC receiving text messages for display on the display INC, and another INC allowing text messages to be composed and sent to another person elsewhere. Electronic mail messages may also be composed and received in a similar manner in step <b>3635.</b>

0201Different types of communication may be provided as appropriate. For example, voice communications may be provided in step <b>3640.</b> Text communication may be provided in step <b>3642.</b> Video communication may be provided in step <b>3644.</b> Other formats of communication may also be supported if desired.

0202In step <b>3650,</b> data may be transmitted by a communications device in one of the INCs in the MPN. This may include substep <b>3652</b> transmitting image data, substep <b>3654</b> transmitting audio data, substep <b>3656</b> transmitting video data, and substep <b>3658</b> transmitting text data. The data to be transmitted may be provided by the user with a user input INC, may be stored in memory within the MPN, and may be transmitted among INCs in the MPN prior to sending.

0203In step <b>3660,</b> data may be received by a communications device in one of the INCs in the MPN. This may include substep <b>3662</b> receiving image data, substep <b>3664</b> receiving audio data, substep <b>3666</b> receiving video data, and substep <b>3668</b> receiving text data. The data received may be transmitted among INCs in the MPN and stored in memory within the MPN, prior to its being provided to the user on one or more of the INCs, such as a display INC or audio output INC. If desired, a communications alert may be provided to the user on the display or audio output INC to let the user know that a message has been received.

0204If desired, input and output INCs in the MPN may be shared between a communications function and another function of the MPN. For example, music may be paused or muted while voice communications or communications alerts are being provided to the audio output INC.

0205<figref idref="f0049">FIG. <b>37</b></figref> shows more detail of step <b>3610</b> (<figref idref="f0048">FIG. <b>36</b></figref><b>),</b> communicating between MPNs. All steps are optional and may be performed in any suitable order. As described above, one of the INCs of the MPN may include a communications device for exchanging data with an INC of another MPN. Alternatively, the communications device used for exchanging data among INCs of a single MPN may also be used to exchange data with another MPN that may be in proximity. For example, the user may have downloaded software into the control unit or other INC that allows such communication. The user may use the user input INC to notify the MPN that these communications are to begin. The MPN may then begin to send messages to an INC of the other MPN, and may listen for incoming messages from the other MPN. In this manner, each MPN may determine the network identifier of the other user's MPN. In step <b>3710</b> of <figref idref="f0049">FIG. 37</figref>, data may be sent from one MPN to another. For example, the control unit or other INC may tag an outgoing message with the network identifier of the other MPN.

0206The data may include personal data in step <b>3720.</b> For example, if the two MPNs are configured to provide personal organization features, the data sent from one to the other may include contact information, such as a name, phone number, electronic mail address, or other suitable information.

0207In step <b>3730,</b> the data sent between MPNs may include game data. This may allow the users to play a game that requires two or more players, if both users have the same game software installed.

0208In step <b>3740,</b> the data may allow two users to compete athletically. For example, the two users may each be on a stationary bicycle, and performance data may be exchanged between them. The two MPNs may determine who wins the competition based on data gathered from the two stationary bicycles or other sensors.

0209In step <b>3750,</b> one user may send software to another user. This may include, for example, software that enables an MPN to perform a specific feature or provide a specific function. In step <b>3760,</b> one user may be allowed to send a digital music file, or other recorded media, to another.

0210Any other suitable type of data may be exchanged between MPNs. If desired, data may be exchanged between more than two MPNs simultaneously, for example allowing a game with more than two players.

0211<figref idref="f0050">FIG. <b>38</b></figref> shows two users with MPNs that are communicating. First user <b>3820</b> is wearing first MPN <b>3810.</b> First MPN <b>3810</b> includes control unit <b>3830</b> and display INC <b>3840.</b> User controls may be incorporated into either INC. Second user <b>3870</b> is wearing second MPN <b>3860,</b> consisting of control unit <b>3880</b> and display INC <b>3890.</b> Either of these two INCs may have user controls as well. Data may be exchanged between control unit <b>3830</b> and control unit <b>3880.</b> Exchanged data may be displayed on display INC <b>3840</b> and display INC <b>3890.</b> User <b>3820</b> and user <b>3870</b> may, for example, exchange personal contact information or may play a game. The INCs shown are merely illustrative.

0212Another example of two users with communicating MPNs is shown in <figref idref="f0051">FIG. <b>39</b></figref><b>.</b> First user <b>3920</b> is on first bicycle <b>3915,</b> mounted on a stationary training stand. Second user <b>3970</b> is on second bicycle <b>3965,</b> also mounted on a stationary training stand. First MPN <b>3910</b> may include INC <b>3925</b> which may combine display functions and user controls with a control unit and which may be mounted on bicycle <b>3915.</b> First MPN <b>3910</b> may include audio output INC <b>3930</b> worn by first user <b>3920</b> inside a helmet or headband. It may include INC <b>3935</b> that controls the difficulty setting of the training stand. It may also include INC <b>3940</b> that measures the speed of the rear wheel of bicycle <b>3915.</b> Second MPN <b>3960</b> may similarly include user input/display/control unit <b>3975,</b> audio output INC <b>3980,</b> difficulty setting INC <b>3985,</b> and speed sensor <b>3990.</b> The two control units may control the difficulty for the two riders to simulate a specific race course, and may compare the speeds of the two riders. The display INCs may be used to provide feedback on the comparative progress on the simulated course of the two riders, for example notifying each rider of the comparative position of the other. The INCs shown are merely illustrative.

0213<figref idref="f0052">FIG. <b>40</b></figref> shows more detail of step <b>3220</b> (<figref idref="f0044">FIG. <b>32</b></figref><b>),</b> providing entertainment functions. All steps are optional and may be performed in any suitable order. In step <b>4010,</b> recorded music may be played. For example, songs may be stored in digital format (e.g., MP3 format) in memory in the control unit or other INC with storage capabilities. The storage INC may read the digital audio data and send it to the audio output INC, which may play the audio for the user. If desired, the system may provide audio control functions, such as volume control, playing and stopping, skipping songs, repeating a song, random play, etc. In step <b>4015,</b> broadcast music (e.g., radio) may be played by the MPN. A radio receiver may be included in one of the INCs. The radio signal may be received and sent to the audio output INC to allow the user to listen. If desired, the audio signal may be digitized for processing within the system. If desired, the system may include volume changing and station selection functions, and other desired radio-related features.

0214In step <b>4020,</b> the system may allow audio to be recorded. For example, one of the INCs may include a microphone. The audio may be digitized and stored into memory in one of the INCs, such as a control unit. The recorded audio may be replayed by the user, using the audio output INC. Similarly, video segments may be captured in step <b>4022</b> and still video images may be captured in step <b>4024</b> by an INC with a video input. The video segments may be digitized and stored in memory in one of the INCs. If desired, the captured video segments and images may be viewed by the user on the display INC.

0215If desired, any stored music or any recorded media may be shared with a user of another MPN, as described above in conjunction with <figref idref="f0049">FIG. <b>37</b></figref><b>.</b> Any recorded audio, video, or image data may be uploaded to a personal computer, if desired.

0216In step <b>4030,</b> the user may be allowed to play a game. The game may involve only the user of the MPN. Alternatively it may involve a user of another MPN, if one of the INCs in each MPN includes a communication device capable of communicating with the other MPN. For example, the wireless communications device within each of the INCs may be used to transfer game-related information between MPNs if the two users are in close proximity. An INC of the MPN may also be configured to communicate with an external game device.

0217Music and audio cues may both be provided by a single MPN, as described previously in conjunction with <figref idref="f0040">FIG. <b>29</b></figref><b>.</b>

0218<figref idref="f0052">FIG. <b>41</b></figref> shows more details of step <b>3235</b> (<figref idref="f0044">FIG. <b>32</b></figref><b>),</b> providing personal organization features with an MPN. All steps are optional and may be performed in any suitable order. In step <b>4110,</b> the MPN may support scheduling of appointments. The user input INC and display INC may be used for entering new appointments, modifying appointments, and viewing upcoming schedules. The display INC and audio output INC may be used to inform the user of imminent appointments. In step <b>4120,</b> the MPN may manage contact information. This may include names, phone numbers, addresses, electronic mail addresses, and other information about contacts. In step <b>4130,</b> the MPN may be used to manage a task list. For example, the user may be allowed to enter and prioritize tasks, and to track their completion. In step <b>4140,</b> the MPN may allow the user to keep a journal. The user may be able to create text, audio, video, and other types of entries.

0219In step <b>4150,</b> the personal organizer data stored by the MPN may be synchronized with another system, such as a software application running on a personal computer. Appointments, contacts, tasks, and journal entries created on either system may be copied to the other system. This may allow the user to keep a permanent or backup copy of data created in the mobile system, and may also allow the user to take advantage of the keyboard, mouse, and full-sized monitor on the personal computer to enter significant amounts of information. In step <b>4160,</b> information may be shared with another MPN, as described above in conjunction with <figref idref="f0049">FIG. <b>37</b></figref><b>.</b>

0220<figref idref="f0053">FIG. <b>42</b></figref> shows more detail of step <b>4140</b> (<figref idref="f0052">FIG. <b>41</b></figref><b>),</b> allowing the user to maintain a mobile electronic journal. All steps are optional and may be performed in any suitable order. In step <b>4210,</b> a user may be allowed to enter journal entries. Entries may include voice in substep <b>4212,</b> text in substep <b>4214,</b> input from an electronic sketchpad in substep <b>4216,</b> or any other suitable type of entry or combination of entries. In step <b>4220,</b> the user may be allowed to capture a video image, for example using an INC that has digital camera hardware. If desired, the user may capture a video clip. In substep <b>4225,</b> the captured video image may be stored with a journal entry. For example, it may be stored in the same memory, and there may be a link from one to the other. In step <b>4230,</b> the journal entry may be automatically tagged with the current date and time if one of the INCs in the MPN includes a clock. In step <b>4235,</b> the journal entry may be automatically tagged with the current location, if one of the INCs in the MPN includes a position monitor such as a global positioning system (GPS) monitor. In step <b>4240,</b> the user may be allowed to control functions of the journal using the audio input, if the MPN includes a speech recognition function. In step <b>4250,</b> a database may be downloaded into memory in the MPN. The database may include data of interest to the user, and may relate to topics to which the user may refer in the journal. For example, the database may include travel-related information, music-related information, school-related information, work-related information, or any other suitable data. In step <b>4255,</b> the user may be allowed to link a journal entry to a database element.

0221In step <b>4260,</b> any journal entries stored in the MPN may be uploaded to a personal computer. This may include the voice, text, and drawing parts of the entries, as well as any linked images and time and location tags. It may also include links to any database elements that may be linked to the journal entries, or it may include the data from the database elements themselves. In step <b>4265,</b> the uploaded journal may be converted into a standard file format, so that it may be easily viewed or printed with the personal computer. The file format may include HTML, PDF, or any other suitable format. Images and audio segments may also be stored in a common file format. The data may be loaded into a database on the personal computer if desired.

0222<figref idref="f0054">FIG. <b>43A</b></figref> shows more detail of step <b>3208</b> (<figref idref="f0044">FIG. <b>32</b></figref><b>),</b> providing a guidance function using an MPN. In step <b>4310,</b> the MPN may include a position monitor INC. This may be a GPS monitor in substep <b>4312.</b> The system may also include an elevation monitor in substep <b>4314,</b> which may, for example, use barometric pressure readings. In step <b>4320,</b> the position monitor may be used to provide current user information. This may include current position in substep <b>4322,</b> current speed in substep <b>4324,</b> current elevation in substep <b>4326,</b> and current elevation gain in substep <b>4328.</b> If desired, the system may also collect direction information, for example from a compass, and provide direction information.

0223In step <b>4330,</b> route guidance may be provided to a user. Turning to <figref idref="f0055">FIG. <b>43B</b></figref> for greater detail of step <b>4330,</b> route guidance may include step <b>4331,</b> in which map information may be downloaded into memory in the MPN. The map information may be downloaded using the wireless communications device in one of the INCs. Alternatively, it may be loaded from a memory device, such as a CD-ROM. In step <b>4332,</b> the user may be allowed to enter a desired location. For example, the user may enter an address or the name of a destination, the user may choose a destination from a list, the user may point to a destination on a map displayed on a touch screen, or the user may speak the desired location. In step <b>4333,</b> an INC in the MPN may calculate a route from the current location to the desired location. This may be done using any suitable algorithm or combination of algorithms that may compare various routes based on distance, estimated time, traffic, road conditions, or any other suitable criteria. If desired, the user may be allowed to enter criteria for choosing a route, or may be allowed to choose from multiple routes. In step <b>4334,</b> map information may be displayed. The map information may include the current location, the desired location, and/or all or part of the route between them. In step <b>4335,</b> the user's current location may be displayed on the map. This may also include other information, such as the user's direction and speed. In step 4336, route guidance may be displayed. In addition to displaying the chosen route on the map, the system may provide, either visually or audibly, prompts informing the user of turns and other actions. The system may also make corrections to the route if the user misses a turn or otherwise does not follow the guidance.

0224Returning to <figref idref="f0054">FIG. <b>43A</b></figref><b>,</b> in step <b>4340,</b> the system may collect and store position information as the user moves. This may include, for example, location, speed, and elevation, along with the time at which each measurement was taken. This step may also include substep <b>4341,</b> uploading the collected data to a base station or personal computer. The collected data may be saved in a database, displayed, or analyzed, by an INC of the MPN, by a base station, by a personal computer, by a computer accessed over a wide area network such as the Internet, or in any other suitable location. In step <b>4342,</b> the user may be allowed to annotate the collected position data, or otherwise modify it. For example, the user may enter text, create a voice annotation, or capture a video image or segment. Annotations may include information about a location, about the route, personal notes, images or video clips of sights seen, or any other information. If desired, the system may have a number of predefined annotations that may be quickly and easily entered by the user at any point. The system may store the annotation with the position information, and may create a link between the data items. The user may also be allowed to modify the collected data itself. The annotation or modification may be created as the position information is collected in substep <b>4343,</b> for example using an input device that may be an INC in the MPN. The annotation or modification may also be created after the position information has been collected in substep <b>4344,</b> for example using an input device connected to a personal computer. In step <b>4345,</b> the collected information may be correlated with map data. This may be done in the MPN, using map data stored in memory in an INC of the MPN, or on a personal computer after the position information has been uploaded. The position information, along with any annotations, may be displayed on a map, for example showing the route taken by the user.

0225In step <b>4350,</b> position information may be correlated with simultaneously collected performance information. This may be useful in an MPN that is also used to support athletic workouts. For example, the route may be an athletic training route or an athletic competition route. The performance information may, for example, be speed in substep <b>4351,</b> heart rate in substep <b>4352,</b> cadence, or any other suitable performance data. The personal data may be stored with the position data, and the system may also store links between the two data items. This collected performance data may be displayed during the session. It may also be displayed or printed on a personal computer at a later time. It may be displayed in a table, in a graph, on a map, on an elevation profile, or any other suitable format. In step <b>4353,</b> performance data may be collected during multiple sessions. In step <b>4354,</b> the performance data may be compared between sessions. The comparison may be for the entire sessions, or for portions of the sessions following the same route. For example, a table or graph may be used to show the performance differences between two sessions. Summary information, such as averages, may also be provided. Information may be displayed on an INC of the MPN, on a personal computer after being uploaded, to a computer accessed via a wide area network such as the Internet, or at any other suitable location.

0226The collected position information may be used to recommend a route for a later session in step <b>4360.</b> For example, the MPN may store position information from one or more sessions, and may construct map data of routes that are available to the user. Prior to or during a later session, the constructed map data may be used to plan a route for the user. The system may also use the collected performance data to plan the route. If desired, the route may be that of an upcoming athletic competition, and the system may be used to collect information about the route, such as elevation profile, distance of individual segments, landmarks, or other information of interest. In substep <b>4361,</b> a route may be recommended based on a desired workout intensity. For example, the system may use collected heart rate data or an elevation profile to choose a route with the desired difficulty. In substep <b>4362,</b> a user may specify a desired elevation profile, and the system may choose a route that most closely matches the user's preference. In substep <b>4363,</b> the system may recommend a route based on a desired distance chosen by the user. If desired, the system may allow the user to specify any other suitable criteria, or combination of criteria, for route selection. In step <b>4365,</b> the MPN may provide directions or other guidance to the user during a session, based on the selected route. If desired, the guidance may be based on a route chosen ahead of time and downloaded. Alternatively, the directions may be made dynamically, as specific decision points are reached. For example, a prompt to take a specific turn may be shown on the display INC or played through the audio output INC. The system may also make modifications to the recommended route if the user does not follow the prompts. If desired, the chosen route may be based on map and elevation information loaded from a CD-ROM or other memory device or loaded from the Internet or other network, rather than using position information collected by the user.

0227Position data collected in one session may also be used to simulate the same route in a later session. For example, a user may travel the route of an upcoming competition in one or more sessions and collect position and elevation information. This collected position and elevation information may be used to control exercise equipment in later sessions to simulate the racecourse.

0228<figref idref="f0056">FIG. <b>44</b></figref> shows an illustrative MPN <b>4400</b> that may be used to provide guidance to an athlete. INC <b>4410</b> may be worn on a waistband, and may include a control unit, a GPS monitor, an elevation sensor, user input controls, and a clock. INC <b>4420</b> may be worn on a wristband and may include a display device and an accelerometer. INC <b>4430</b> may be worn on a headband, and may include an audio output device. INC <b>4440</b> may be worn on a chest strap and may include a heart rate sensor. INC <b>4450</b> may be worn on an ankle band and may include an accelerometer. Use of accelerometers mounted on the arm and leg to perform functions such as measuring cadence and providing form feedback is described in more detail below. INCs shown are merely illustrative, and all INCs are optional.

0229<figref idref="f0057">FIGs. <b>45A</b> through <b>45L</b></figref> show examples of screens that may be provided by display INC <b>4420</b> in an MPN <b>4400</b> (<figref idref="f0056">FIG. <b>44</b></figref><b>)</b> that may be used for guidance and athletic functions. <figref idref="f0057">FIG. <b>45A</b></figref> provides a display of the user's current altitude. <figref idref="f0057">FIG. <b>45B</b></figref> provides a display of the user's current geographical location. <figref idref="f0057">FIG. <b>45C</b></figref> provides a display of the user's current speed. <figref idref="f0057">FIG. <b>45D</b></figref> provides a display of the user's current rate of elevation change. <figref idref="f0057">FIG. <b>45E</b></figref> provides a display of the user's heart rate. <figref idref="f0057">FIG. <b>45F</b></figref> provides a display of a route prompt. <figref idref="f0057">FIG. <b>45G</b></figref> provides a display of the user's current cadence. <figref idref="f0057">FIG. <b>45H</b></figref> provides a display of the user's current stride length. <figref idref="f0057">FIG. <b>45I</b></figref> provides a display of the current date and time. <figref idref="f0057">FIG. <b>45</b></figref><b>J</b> provides a display of a session total time and partial time from a stopwatch function. <figref idref="f0057">FIG. <b>45K</b></figref> provides a display of an interval timer. <figref idref="f0057">FIG. <b>45L</b></figref> provides a display of a speed prompt. These screens are merely illustrative. Any suitable information may be displayed, in any suitable format. If desired, any of this information may be sent to an audio output INC in addition to or instead of the display INC.

0230<figref idref="f0058 f0059">FIGs. <b>46</b> through <b>49</b></figref> show illustrative screens that may be displayed on a personal computer configured to interface with an MPN that provides guidance features and athletic features. <figref idref="f0058">FIG. <b>46</b></figref> shows session overview screen <b>4600</b> that may display collected position, performance, and annotation data for a session. Graphs <b>4610, 4620, 4630, 4640,</b> and <b>4650,</b> along with note line <b>4660,</b> may all be displayed relative to a common time line. Graph <b>4610</b> may display elevation vs. time for the session or portion of session. Graph <b>4620</b> may display speed vs. time for the session or portion of session. Graph <b>4630</b> may display heart rate vs. time for the session or portion of session. Graph <b>4640</b> may display stride length vs. time for the session or portion of session. Graph <b>4650</b> may display cadence vs. time for the session or portion of session. The user may be allowed to click on any graph to view more details of the graphed data (such as a chart of the data). These graphs are merely illustrative. Any suitable data may be graphed or charted. Note line <b>4660</b> may display indicator to show the link between time and each annotation. For example, indicator <b>4662</b> may indicate that an audio annotation has been linked to that first specific time during the session. Indicator <b>4664</b> may indicate that a video annotation may be linked to that second specific time during the session. Indicator <b>4666</b> may indicate that a text annotation has been linked to that third specific time during the session. The user may be allowed to point the mouse at an indicator or click on it to view the actual annotation. Menu bar <b>4670</b> may provide user access to various functions. For example, file menu <b>4672</b> may allow the user to save the session data, open a file with other session data, or perform other file related functions. Notes menu <b>4674</b> may allow the user to perform functions related to annotations, such as adding a new annotation, modifying an annotation, deleting an annotation, or viewing an existing annotation. Time menu <b>4676</b> may allow the user to perform time-related functions, such as modifying which time span from the session is graphed. View menu <b>4678</b> may allow the user to change the display to another view of the same data (such as a chart), or to any other display supported by the system. This may include, for example, allowing the user to select session comparison display <b>4700</b> of <figref idref="f0058">FIG. <b>47</b></figref> or map view <b>4800</b> of <figref idref="f0059">FIG. <b>48</b></figref><b>.</b> The menu options described here are merely illustrative. Any suitable menu options may be offered. For example, an option may be offered to allow the user to select which types of data to graph.

0231<figref idref="f0058">FIG. <b>47</b></figref> shows session comparison screen <b>4700</b> that may display collected position, performance, and annotation data for multiple sessions or partial session in which the user followed the same route. Graphs <b>4720, 4730,</b> and <b>4740</b> may all be displayed relative to a common distance line. Graph <b>4720</b> may display elevation vs. distance for the common route or portion of route. Graph <b>4730</b> may display speed vs. distance for the first session or portion of session on date <b>4735.</b> Graph <b>4740</b> may display speed vs. distance for the second session or portion of session on date <b>4745.</b> The user may be allowed to click on any graph to view more details of the graphed data (such as a chart of the data). These graphs are merely illustrative. Any suitable data may be graphed or charted. Summary region <b>4750</b> may display and compare summary data from the multiple sessions. For example, if speed data is graphed on the screen, the summary region <b>4750</b> may display average and maximum speed for the graphed segment of each session. Menu bar <b>4710</b> may provide user access to various functions. For example, file menu <b>4712</b> may allow the user to save the session data, open a file with other session data, or perform other file related functions. Time menu <b>4714</b> may allow the user to perform time-related functions, such as modifying which time span from the session is graphed. Data menu <b>4716</b> may allow the user to perform data-related functions, such as modifying which data from the session is graphed. View menu <b>4718</b> may allow the user to change the display to another view of the same data (such as a chart), or to any other display supported by the system. This may include, for example, allowing the user to select session overview display <b>4600</b> of <figref idref="f0058">FIG. <b>46</b></figref> or map view <b>4800</b> of <figref idref="f0059">FIG. <b>48</b></figref><b>.</b> The menu options described here are merely illustrative. Any suitable menu options may be offered. For example, an option may be offered to view or modify annotations.

0232<figref idref="f0059">FIG. <b>48</b></figref> shows map view screen <b>4800</b> that may display collected position, performance, and annotation data for a session or partial session in relation to a map. Date field <b>4820</b> may display the date and/or time of the session being viewed. Road indicator <b>4830</b> may show the roads, trails, and other fixed items from the region in which the session occurred. Route indicator <b>4840</b> may be used to indicate the actual route followed by the user during the session. Route indicator <b>4840</b> may have different characteristics to indicate different performance data. For example, there may be three different line styles used to indicate heart rate above a desired zone, within a desired zone, and below a desired zone. The number of line styles and the performance parameter shown are merely illustrative. Any suitable data divided into any suitable number of zones may be drawn on the map. If desired, multiple performance parameters may be shown on the same map. The user may be allowed to click on the map to view more details of the data (such as a chart or graph of the data). Note indicators may be displayed on the map to show the link between the route and each annotation. For example, indicator <b>4852</b> may indicate that an audio annotation has been linked to that first specific time during the session. Indicator <b>4854</b> may indicate that a video annotation may be linked to that second specific time during the session. Indicator <b>4856</b> may indicate that a text annotation has been linked to that third specific time during the session. The user may be allowed to point the mouse at an indicator or click on it to view the actual annotation. Legend <b>4860</b> may display a legend of the line styles used for the road indicator and route indicator, along with any other information that may be displayed on the map. For example, a legend may be provided for the different styles of annotation indicator. Menu bar <b>4810</b> may provide user access to various functions. For example, file menu <b>4812</b> may allow the user to save the session data, open a file with other session data, or perform other file related functions. Notes menu <b>4814</b> may allow the user to perform functions related to annotations, such as adding a new annotation, modifying an annotation, deleting an annotation, or viewing an existing annotation. Data menu <b>4816</b> may allow the user to perform data-related functions, such as modifying which data from the session is shown on the map. View menu <b>4818</b> may allow the user to change the display to another view of the same data (such as a chart), or to any other display supported by the system. This may include, for example, allowing the user to select session overview display <b>4600</b> of <figref idref="f0058">FIG. <b>46</b></figref> or session comparison display <b>4700</b> of <figref idref="f0058">FIG. <b>47</b></figref><b>.</b> The menu options described here are merely illustrative. Any suitable menu options may be offered. For example, an option may be offered to zoom into a portion of the route.

0233<figref idref="f0059">FIG. <b>49</b></figref> shows session planning screen <b>4900</b> that may allow the user to enter desired attributes of an upcoming session, to allow the system to plan an appropriate route. For example, the user may be allowed to enter a desired total distance in screen region <b>4910.</b> Screen region <b>4920</b> may allow the user to enter a desired total time for the session. Screen region <b>4930</b> may allow the user to enter a desired elevation gain for the route. Screen region <b>4940</b> may allow the user to enter a desired pace or speed for the session. Screen region <b>4950</b> may allow the user to enter a desired heart rate or heart rate range for the session. These parameters are merely illustrative. Any suitable parameters may be offered. The user may be allowed to enter a subset of desired parameters, and the system may create a route that best matches the entered parameters. Menu bar <b>4960</b> may provide user access to various functions. For example, file menu <b>4962</b> may allow the user to save the session data, open a file with other session data, or perform other file related functions. Maps menu <b>4964</b> may allow the user to perform functions related to maps, such as viewing maps of available routes, and selecting one or more preferred routes. The menu options described here are merely illustrative. Any suitable menu options may be offered. For example, an option may be offered to view data from previous sessions.

0234<figref idref="f0060">FIG. <b>50</b></figref> shows more detail of step <b>3210</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> providing an athletic function with an MPN. All steps are optional and may be performed in any suitable order. In step <b>5005,</b> the MPN may be used to control a workout. In step <b>5010,</b> the MPN may be used to control one or more sections of a workout. In step <b>5015,</b> the MPN may be used to collect data from a workout. In step <b>5020,</b> the MPN may be used to provide both music and audio workout cues, as described previously with respect to <figref idref="f0040">FIG. <b>29</b></figref><b>.</b> In step <b>5025,</b> the MPN may be used to provide route guidance during a workout, as described previously with respect to <figref idref="f0054">FIG. <b>43A</b></figref><b>.</b> In step <b>5030,</b> the MPN may measure an athlete's cadence. In step <b>5035,</b> the MPN may measure an athlete's stride length. In step <b>5040,</b> the MPN may be used to control a piece of exercise equipment, as described previously with respect to <figref idref="f0027">FIG. <b>21</b></figref><b>.</b> In step <b>5045,</b> the MPN may be used to collect data from a piece of exercise equipment, as described previously with respect to <figref idref="f0027">FIG. <b>21</b></figref><b>.</b> In step <b>5050,</b> the MPN may correct errors in collected athletic data. In step <b>5055,</b> the MPN may remind an athlete to consume a consumable. In step <b>5060,</b> the MPN may use previously stored data to estimate a performance parameter. In step <b>5065,</b> the MPN may provide for an athletic competition between two or more athletes, as described previously with respect to <figref idref="f0051">FIG. <b>39</b></figref><b>.</b> In step <b>5070,</b> the MPN may provide for a coaching interface. In step <b>5075,</b> the MPN may count swimming laps. In step <b>5080,</b> the MPN may provide form feedback to an athlete. In step <b>5085,</b> the MPN may provide a training journal. More details of these embodiments are described below. These athletic uses of the MPN are merely illustrative. Other athletic uses are possible if desired.

0235<figref idref="f0061">FIG. <b>51</b></figref> shows flow chart <b>5100</b> of an illustrative process for providing workout control and feedback. All steps are optional and may be performed in any suitable order. In step <b>5110,</b> workout parameters may be defined. The parameters may be defined, for example, on a coach's computer or on an athlete's computer. The parameters may be entered by a user such as the coach or athlete, or they may be generated automatically by a coaching software application. The parameters may define aspects of a planned workout, such as its type, duration, intensity, etc. In step <b>5120,</b> if the workout parameters were defined on a coach's computer, they may be downloaded to the athlete's computer. In step <b>5125,</b> the parameters may be downloaded from the athlete's computer to an INC in the MPN, such as a control unit. In step <b>5130,</b> the INC may control aspects of the workout session, using an output INC in the MPN. In step <b>5140,</b> the INC may collect workout results from an input INC in the MPN. In step <b>5150,</b> the workout results may be uploaded to the athlete's computer. In step <b>5155,</b> the workout results may be uploaded to the coach's computer. In step <b>5160</b>, the workout results may be stored, for example on the athlete's computer or the coach's computer. In step <b>5170,</b> the workout results may be analyzed, for example on the athlete's computer or the coach's computer. For example, the workout results may be displayed, or may be compared with workout results from other workout sessions. In step <b>5180,</b> the workout results may be used to determine parameters for one or more upcoming workout sessions, for example on the athlete's computer or the coach's computer.

0236<figref idref="f0062">FIG. <b>52</b></figref> shows a block diagram of an illustrative system <b>5200</b> for communicating between a personal computer <b>5210</b> and a control unit <b>5240</b> that is an INC in an MPN. Personal computer <b>5210</b> may have communications device <b>5220,</b> control unit <b>5240</b> may have communications device <b>5250,</b> and they may communicate using communication path <b>5230.</b> Communication path <b>5230</b> may be a wireless radio frequency link, an infrared link, a docking station link, a USB link, a serial port link, or any other suitable type of communications path. Control unit <b>5240</b> may include processor <b>5260</b> for executing software related to controlling a workout, collecting workout results, communicating with personal computer <b>5210,</b> and communicating with other INCs in the MPN. Control unit <b>5240</b> may also include memory <b>5270</b> for holding software, downloaded workout parameters, and collected workout results.

0237<figref idref="f0063">FIG. <b>53</b></figref> shows a block diagram of an illustrative MPN <b>5300</b> for controlling aspects of an athletic workout and collecting results from a workout. Control unit <b>5240</b> may be the same control unit shown in <figref idref="f0062">FIG. <b>52</b></figref><b>,</b> and may be configured to communicate with a personal computer as shown in that FIG. It may also have wireless communications device <b>5310</b> for communicating with other INCs in MPN <b>5300</b> over wireless communication path <b>5350,</b> such as data collection INC <b>5320</b> and output INC <b>5330.</b> If desired, wireless communications device <b>5310</b> may be the same as communications device <b>5250.</b> If desired, control unit <b>5240</b> may be omitted, and its functions may be assumed by other INCs in the MPN.

0238Data collection INC <b>5320</b> may have wireless communication device <b>5322</b> for sending collected data to control unit <b>5240</b> or other INC having storage capabilities. It may also have data collection circuit <b>5324.</b> Data collection circuit <b>5324</b> may collect any athletic data, such as speed, heart rate, power, resistance, location, cadence, or any other suitable type of athletic data. Data collection INC <b>5320</b> may be worn by the athlete. If desired, data collection INC <b>5320</b> may be mounted on a piece of athletic equipment or a bicycle and may collect data from that equipment.

0239Output INC <b>5330</b> may have wireless communication device <b>5332</b> for receiving control commands from control unit <b>5240</b> or other suitable INC. It may also have output circuit <b>5334.</b> Output circuit <b>5334</b> may output athletic control data using any appropriate method, such as displaying a prompt to the user, outputting a prompt to the user, controlling resistance, controlling speed, or any other suitable type of athletic control. Output INC <b>5330</b> may be worn by the athlete. If desired, output INC <b>5330</b> may be mounted on a piece of athletic equipment or a bicycle and may send control commands to that equipment.

0240<figref idref="f0064">FIG. <b>54</b></figref> shows how MPN <b>5300</b> (<figref idref="f0063">FIG. <b>53</b></figref><b>)</b> may communicate with an athlete's personal computer <b>5210</b> and a coach's personal computer <b>5410.</b> Athlete's personal computer <b>5210</b> may communicate with coach's personal computer <b>5410</b> using any suitable network <b>5415,</b> such as the Internet. Either computer may connect with network <b>5415</b> using connection <b>5412</b> and <b>5418,</b> such as a telephone modem, a cable modem, a digital subscriber line modem, or any other suitable type of connection. As shown previously, athlete's personal computer <b>5210</b> may connect to control unit <b>5240,</b> and control unit <b>5240</b> may send commands to athletic output INC <b>5330</b> and collect data from athletic data collection INC <b>5320.</b> If desired, connections may not all be in place simultaneously. For example, at a first time, coach's computer <b>5410</b> may be connected to network <b>5415,</b> and workout parameters may be uploaded to a web server. At a second time, athlete's computer <b>5210</b> may be connected to network <b>5415,</b> and workout parameters may be downloaded from the web server. At a third time, athlete's personal computer <b>5210</b> may be connected to control unit <b>5240,</b> and workout parameters may be downloaded into control unit <b>5240.</b> At a fourth time, which may be during a workout session, the control unit <b>5240</b> may send control commands to athletic output INC 5330 and may receive data from athletic data collection INC <b>5320.</b> At a fifth time, workout results may be uploaded from control unit <b>5240</b> to athlete's personal computer <b>5210.</b> At a sixth time, workout results may be uploaded from athlete's personal computer <b>5210</b> to a web server in network <b>5415.</b> At a seventh time, workout results may be downloaded from the web server in network <b>5415</b> into coach's computer <b>5410.</b> If desired, data may be sent directly between coach's computer <b>5410</b> and athlete's computer <b>5210,</b> rather than using a web server to store data sent from one to the other. If desired, control unit <b>5240</b> may be omitted, and athlete's personal computer <b>5210</b> may connect directly to athletic output INC <b>5330</b> and athletic data collection INC <b>5320</b> or storage INC (not shown).

0241<figref idref="f0065">FIG. <b>55</b></figref> shows illustrative MPN <b>5500</b> that may be used to provide control of an athletic workout and collect workout results. INC <b>5510</b> may be a control unit, and may be worn by the athlete. INC <b>5515</b> may be an athletic data collection INC worn by the athlete, and may include a heart rate sensor. INC <b>5520</b> may be an athletic output INC worn by the athlete, and may include an audio output INC. INC <b>5525</b> may be an athletic output INC mounted on a bicycle, and may include a display INC. INC <b>5530</b> may be an athletic data collection INC mounted on a bicycle, and may include a pedal cadence sensor. INC <b>5535</b> may be an athletic data collection INC mounted on a bicycle, and may include a wheel speed sensor. INC <b>5540</b> may be an athletic output INC mounted on a bicycle training stand, and may include resistance control device. During a workout, the control unit may control aspects of the workout by changing the cycling difficulty using INC <b>5540,</b> and by providing prompts to the athlete using INC <b>5520</b> and INC <b>5525.</b> Prompts may include, for example, prompts to pedal faster, slower, harder, or easier, to stand or sit, to pedal with one leg or both legs, or any other suitable prompts. INCs shown are merely illustrative, and each INC is optional.

0242<figref idref="f0066">FIG. 56</figref> shows a flow chart of an illustrative process <b>5600</b> for managing a workout plan. All steps are optional and may be performed in any suitable order. The workout plan may be managed using software on athlete's computer <b>5210</b> or coach's computer <b>5410</b> (<figref idref="f0064">FIG. <b>54</b></figref><b>).</b> In step <b>5610,</b> a workout goal may be defined. This may include a specific date in substep <b>5612,</b> a specific upcoming competition in substep <b>5614,</b> a specific performance goal in substep <b>5616,</b> a specific health goal in substep <b>5618,</b> or any other suitable type of goal. If desired, multiple goals may be defined. In step <b>5620,</b> a workout plan may be defined based on the workout goal. This may include different types of workouts, different periods of time with specific sub-goals, or other suitable plan. In step <b>5625,</b> a workout session may be defined. That may include a type of workout, duration, intensity, repetitions, or any other suitable parameters. As many parameters as desired may be created for each workout. The workout plan may include tracking of multiple planned workout sessions. In step <b>5630,</b> the workout parameters may be downloaded from the coach's computer or athlete's computer into an INC of the MPN, such as a control unit or storage INC. In step <b>5635</b> and step <b>5640,</b> during a workout session, aspects of the workout may be controlled and data may be collected. In step <b>5645,</b> workout results may be uploaded. This may include storing results on the athlete's computer or the coach's computer. Results may be stored for multiple workout sessions. This may include storing the parameters that were used to define the workout sessions, as well as data collected during the sessions. In step <b>5650,</b> workout results may be displayed for the athlete or coach. In step <b>5655,</b> workout results may be analyzed. This may include comparing results between multiple workout sessions. In step <b>5660,</b> the workout results may be used to modify one or more parameters for an upcoming workout session. Workout results may include data collected during a workout, as well as the workout parameters used during the workout session. Workout results may include information on missed workout sessions. Workout results may also include related information such as athlete health information, athlete eating and drinking records, athlete's resting heart rate, and other auxiliary information. For example, a future workout may be made easier or harder depending on the results of the workout. In another example, if the time of a workout session was changed, an upcoming session may also be moved or canceled. If desired, in substep <b>5665,</b> rules may be applied to restrict how future workout modifications may be made. For example, a rule may restrict the system from scheduling two workouts of the same type on the same or consecutive days. As another example, the intensity, difficulty, or duration may not be allowed to increase more than a fixed percentage, such as ten percent. And in step <b>5670,</b> the results of all workouts in a plan may be tracked as they occur. The coach or athlete may be allowed to view historical data, to view trends and improvements, or compare the results of two or more workout sessions. This may also include comparing the collected workout results to the workout plan goal or goals. If desired, other data, such as data entered by the coach or athlete, may be compared with the workout plan goal.

0243In <figref idref="f0067">FIG. <b>57</b></figref><b>,</b> more details are shown of step <b>5625</b> (<figref idref="f0066">FIG. <b>56</b></figref><b>),</b> defining the workout parameters. All steps are optional and may be performed in any suitable order. In step <b>5710,</b> the day and time of a workout may be defined. The workout time may be defined with any suitable degree of specificity, such as any time within a week, any time within a three day period, any time on a specific day, before or after a different workout, or at a specific hour. In step <b>5720,</b> the type of workout may be defined. This may include a general workout type, such as running, cycling, swimming, weightlifting, rowing, or the like. It may also include a style of workout, such as endurance, speed work, interval training, fartlek ("speed play" - bursts of speed during a training run) training, hill work, strength training, or any other suitable style. In step 5730, the duration of the workout may be defined. The duration may be measured in time, distance, or any other suitable units. The duration may be expressed as a range, if desired.

0244In step <b>5740,</b> the workout may be divided into sections. Each section may have its own goal, such as warm up, increasing anaerobic threshold, recovery, increasing endurance, cool down, or any other suitable goal. Each section may be provided its own set of workout parameters. For example, in step <b>5750,</b> target intensity may be defined for a section. In step <b>5760,</b> target heart rate, speed, power, cadence, or any other parameter to be controlled may be defined for the section. If desired, multiple parameters to be controlled may be defined. If desired, the desired profile of the parameter or parameters during the section may be specified. If desired, a section may be defined with no parameter to be controlled. For example, the desired heart rate for a section may be 100 beats per minute at the start of the section, and may increase linearly to a value of 130 beats per minute at the end of the section. In step <b>5770,</b> the duration of each section may be defined. The duration may be measured in units of time, units of distance, or any other suitable units. In step <b>5780,</b> the controlling parameter for the section may be defined. For example, to control the heart rate, the athlete's speed may be controlled by sending audible prompts, the speed may be controlled by sending commands to a piece of exercise equipment, or the resistance may be controlled by sending commands to a piece of exercise equipment. If desired, multiple controlling parameters may be specified. If desired, limits on the values or rate of change of the controlling parameter may be specified. In step <b>5790,</b> repetitions of sections may be defined. For example, two sections may be alternated, and the combination may be repeated four times. Any other suitable attributes of a section may also be defined. If desired, the definition of one section may be copied from the definition of another section.

0245<figref idref="f0068">FIG. <b>58</b></figref> shows illustrative screen <b>5800</b> that may be shown on athlete's computer or coach's computer for defining a workout. Region <b>5810</b> may be used to enter the total number of sections. Region <b>5820</b> may be used to enter the duration of a section, in this example in minutes. Selection <b>5830</b> may be used to choose the parameter to be controlled. In this example, heart rate has been chosen, and other choices are cadence, power, and speed. The user may also choose to control no parameter during the section. Selection <b>5840</b> may allow the user to specify the type of control, such as constant, between two values, linear, or on a defined curve. In this example, the user has chosen linear control. In region <b>5850,</b> the user may enter the value or values at which to control the parameter. In this example, the user has entered a desired starting and ending heart rate for the section. Selection <b>5860</b> may allow the user to specify the controlling parameter, such as controlling heart rate by controlling speed or difficulty. In this example, the user has chosen difficulty as the controlling parameter. Scroll bar <b>5880</b> may allow the user to view and modify more fields, such as parameters for other sections in the workout. Menu bar <b>5870</b> may allow the user to access other features, such as file features (e.g., save and loading workout session definition files), edit features, download features (e.g., downloading workout definitions from a coach's computer or to an INC of the MPN), and help features.

0246<figref idref="f0069">FIG. <b>59</b></figref> shows illustrative data structure <b>5900</b> that may be used to store information about a workout session. This data structure or a similar structure may be stored in a personal computer, in memory in an INC of the MPN, or in any other suitable location. If desired, similar information may be stored in multiple data structures. A workout session may consist of multiple "super sections," wherein each super section consists of one or more sections, and wherein each super section may be repeated multiple times. Data structure <b>5900</b> may include a definition of the number of super sections <b>5910.</b> It may also include the definition of each super section, such as super section definition <b>5920,</b> super section definition <b>5940,</b> and super section definition <b>5960.</b> Each super section definition may include a definition of number of sections in the super section, such as definition <b>5921,</b> definition <b>5941,</b> and definition <b>5961.</b> Each super section definition may include a definition of number of times the super section is to be repeated during the workout session, such as definition <b>5922,</b> definition <b>5942,</b> and definition <b>5962.</b>

0247Section A definition <b>5925</b> may specify that the section is to have a duration of 15 minutes in duration definition <b>5926.</b> It may specify that the heart rate is to be controlled in primary parameter definition <b>5927,</b> and that the heart rate is to follow a linear curve from 100 beats per minute to 125 beats per minute in curve definition <b>5928.</b> It may specify a secondary parameter of cadence, which is to be kept at a rate of 90 revolutions per minute in secondary parameter specification <b>5929.</b> It may specify in controlling parameter definition <b>5930</b> that the heart rate is to be controlled by user audio prompt. In this definition, section A is to occur once during the workout session.

0248Section B definition <b>5945</b> may specify that the section is to have a duration of 5 minutes in duration definition <b>5946.</b> It may specify that the heart rate is to be controlled in primary parameter definition <b>5947,</b> and that the heart rate is to be maintained in a range between 150 beats per minute and 160 beats per minute in curve definition <b>5948.</b> It may specify a secondary parameter of cadence, which is to be kept at a rate of 90 revolutions per minute in secondary parameter specification <b>5949.</b> It may specify in controlling parameter definition <b>5950</b> that the heart rate is to be controlled using a resistance setting output.

0249Section C definition <b>5955</b> may specify that the section is to have a duration of 1 minute and 30 seconds in duration definition <b>5956.</b> It may specify that speed is to be controlled in primary parameter definition <b>5957,</b> and that the speed is to be maintained below 15 miles per hour in curve definition <b>5958.</b> It may specify a secondary parameter of resistance, which is to be kept at the easy setting in secondary parameter specification <b>5959.</b> It may specify in controlling parameter definition <b>5960</b> that the speed is to be controlled by user audio prompt. In this definition, section B and section C are combined into a single super section, which is to occur twice during the workout session.

0250Section D definition <b>5975</b> may specify that the section is to have a duration of 15 minutes in duration definition <b>5976.</b> It may specify that the heart rate is to be controlled in primary parameter definition <b>5977,</b> and that the heart rate is to be maintained at a constant rate of 110 beats per minute in curve definition <b>5978.</b> It may specify a secondary parameter of cadence, which is to be kept at a rate of 90 revolutions per minute in secondary parameter specification <b>5979.</b> It may specify in controlling parameter definition <b>5980</b> that the heart rate is to be controlled by user audio prompt. In this definition, section D is to occur once during the workout session.

0251<figref idref="f0070">FIG. <b>60</b></figref> shows flow chart <b>6000</b> of an illustrative process for controlling multiple sections of a workout. All steps are optional and may be performed in any suitable order. In step <b>6010,</b> an athletic workout session may be defined as multiple sections. This workout definition may occur, for example, on an athlete's computer or on a coach's computer. In substep <b>6012,</b> the definition may specify that a section is to be repeated multiple times during a workout session. The repetitions do not have to be consecutive. In substep <b>6014,</b> groups of sections, such as super sections, may be repeated multiple times. In substep <b>6016,</b> one section may be a copy of another section, in the same workout or in another workout. In substep <b>6018,</b> one section may be a variation of another section, in the same workout or another workout. In substep <b>6020,</b> the starting value of a parameter in one sections may be specified as the ending value of the same parameter in the previous section.

0252In step <b>6030,</b> the workout parameters for each section may be defined. This may include substep <b>6032</b> in which a performance parameter to be controlled may be specified. This may include, for example, heart rate, cadence, power, or speed. In substep <b>6034,</b> the desired value, values, or profile of the performance parameter to be controlled may be specified. This may include specifying a constant level, a defined curve, the end points of a linear variation, or two values to maintain the parameter between. If desired, a range above and below the desired curve may be defined. In substep <b>6036,</b> an output parameter to be used to control the performance parameter may be specified. In substep <b>6038,</b> one or more secondary performance parameters with corresponding desired values may be specified. In substep <b>6040,</b> the duration of the section may be specified, for example, in time or distance. After all workout parameters have been defined, they may be downloaded from the coach's computer or athlete's computer into memory in an INC of the MPN, such as a control unit, for use during the workout. If desired, the workout parameters may be transmitted directly from the coach's computer into an INC of the MPN, or they may be transmitted over a wide area network such as the Internet to the athlete's computer, and downloaded from the athlete's computer into an INC of the MPN.

0253In step <b>6050,</b> data may be collected during the section of the workout session. That may include heart rate data in substep <b>6052,</b> speed data in substep <b>6054,</b> position data in substep <b>6056,</b> cadence data in substep <b>6058,</b> power data in substep <b>6060,</b> data from a sensor mounted on a piece of exercise equipment in substep <b>6062,</b> data from a sensor mounted on a bicycle in substep <b>6064,</b> or any other suitable type of input data. Data collected during a workout may be presented to the athlete during the workout, for example on a display INC. If desired, collected data may be uploaded to a base station, the athlete's personal computer or the coach's personal computer, where they may be stored, displayed as a chart or graph, compared with results from previous workouts, or otherwise analyzed. If desired, collected workout results may be used to modify workout parameters of future workout sessions.

0254In step <b>6070,</b> a performance parameter may be controlled during the section of the workout session. This may be done by prompting the user in substep <b>6072.</b> The prompt may be a visual prompt in substep <b>6074</b> or an audible prompt in substep <b>6076.</b> In substep <b>6078,</b> the prompt may be to change speed, change intensity or level of effort, change route, or any other suitable prompt. In substep <b>6080,</b> the control may be performed by changing a setting, such as a difficulty, speed, or resistance setting, on an output INC. In substep <b>6082,</b> the control may be performed by changing a setting on a piece of exercise equipment.

0255In substep <b>6084,</b> the control may be performed using a position-integral-derivative (PID) servo algorithm, in which the value of an input parameter, the rate of change of the input parameter, and previous values of the input parameter are used to calculate a new value for the controlling parameter. The system may also include a set of limits on the output value to prevent it from exceeding a minimum value, a maximum value, and/or a maximum rate of change. In substep <b>6086,</b> the input data used in the algorithm may be data that was collected in step <b>6050,</b> and the definition of the input parameter and the controlling parameter may be part of the workout parameters that were defined in step <b>6030.</b> The constants in the servo equation may be standard values, may be entered or downloaded by a user, or may be derived and modified with use.

0256In substep <b>6088,</b> one or more additional parameters may be controlled during the workout section, as specified in the workout parameters. For example, a secondary parameter may be maintained between two values in substep <b>6090,</b> maintained at a constant level, controlled linearly, or controlled in any other suitable fashion.

0257In addition to directly collecting data to measure a performance parameter, an MPN may use stored information along with collected information to estimate a derived performance parameter. A process for doing so is illustrated in flow chart <b>6100</b> of <figref idref="f0071">FIG. <b>61</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>6110,</b> previously collected personal data may be stored in an INC of the MPN. The personal data may be age in substep <b>6112,</b> gender in substep <b>6114,</b> weight in substep <b>6116,</b> resting heart rate in substep <b>6118,</b> maximum heart rate in substep <b>6120,</b> VO₂ max in substep <b>6122,</b> results (e.g., time and distance or speed and distance) from a previous athletic effort in substep <b>6124,</b> or any other suitable personal data. The personal data may have been collected using an INC of the MPN, in step <b>6130.</b> Alternatively, the personal data may have been downloaded in step <b>6135,</b> for example from an athlete's computer or from a coach's computer, where it may have been entered.

0258In step <b>6140,</b> primary performance data may be collected, for example by an INC of the MPN during an athletic effort. The data may be a single sample, or it may be many samples collected over a period of time. In step <b>6150,</b> a secondary performance parameter may be estimated using the stored personal data and the collected primary performance data. In substep <b>6162,</b> maximum heart rate (MHR) may be calculated. MHR is the maximum rate at which the athlete's heart can beat during a maximal effort, and is commonly measured in beats per minute. The MHR value may be entered by the user as personal data. The MHR may be estimated by the system based on the age and gender entered by the user. For example, MHR is commonly estimated as 220 - age in years. Alternatively it may be estimated as 214 - (age * 0.8) for males and 209 - (age * 0.7) for females. Another method of estimating MHR is 210 - (0.5 * age) - (0.05 * weight in pounds) + (4 if male or 0 if female). The estimate may be modified based on the specific type of activity or other factors. Alternatively, MHR may be estimated based on actual heart rate measurements in a defined athletic effort.

0259Resting heart rate (RHR) may be entered by the athlete as personal data or it may be measured. RHR is a measure of the rate at which the athlete's heart beats when at complete rest, and is also measured in beats per minute. RHR may be estimated based on actual heart rate measurements taken over a period of time, for example while the athlete is asleep. Regardless of how MHR was entered, measured or estimated, the percent of maximum heart rate may be estimated by dividing actual heart rate (HR) by MHR, in substep <b>6154.</b> Percent of heart rate reserve may be estimated as (HR - RHR) / (MHR - RHR), in substep <b>6156.</b>

0260Another performance parameter of interest to athletes is oxygen uptake (VO₂) and maximum oxygen uptake (VO₂ max). VO₂ is a measure of the amount of oxygen removed from the blood and used by the muscles during an athletic effort. VO₂ max is a measure of the maximum amount of oxygen that can be used by the athlete during an effort. Both are commonly measured in units of ml/kg/min. Although the actual measurement of VO₂ requires sophisticated equipment, there are several known methods to estimate it. For example, in "<nplcit id="ncit0001" npl-type="b"><text>Jack Daniels, Conditioning for Distance Running - The Scientific Aspects," Wiley &amp; Sons, 1978</text></nplcit>, the following formulas are used: <maths id="math0001"><math display="block"><mi>Percent max</mi><mo mathvariant="normal">=</mo><mn mathvariant="normal">0.8</mn><mo mathvariant="normal">+</mo><mn mathvariant="normal">0.1894393</mn><mo mathvariant="normal">*</mo><msup><mi mathvariant="normal">e</mi><mo mathvariant="normal">∧</mo></msup><mo>⁢</mo><mfenced><mo mathvariant="normal">-</mo><mn mathvariant="normal">0.012778</mn><mo mathvariant="normal">*</mo><mi mathvariant="normal">t</mi></mfenced><mo mathvariant="normal">+</mo><mn mathvariant="normal">0.2989558</mn><mo mathvariant="normal">*</mo><msup><mi mathvariant="normal">e</mi><mo mathvariant="normal">∧</mo></msup><mfenced><mo mathvariant="normal">-</mo><mn mathvariant="normal">0.1932605</mn></mfenced></math><img file="EP1362430B1_D0001.tif" /></maths><maths id="math0002"><math display="block"><msub><mi>VO</mi><mn mathvariant="normal">2</mn></msub><mo mathvariant="normal">=</mo><mo mathvariant="normal">-</mo><mn mathvariant="normal">4.60</mn><mo mathvariant="normal">+</mo><mn mathvariant="normal">0.182258</mn><mo mathvariant="normal">*</mo><mi mathvariant="normal">v</mi><mo mathvariant="normal">+</mo><mn mathvariant="normal">0.000104</mn><mo mathvariant="normal">*</mo><msup><mi mathvariant="normal">v</mi><mo mathvariant="normal">∧</mo></msup><mo>⁢</mo><mn mathvariant="normal">2</mn></math><img file="EP1362430B1_D0002.tif" /></maths><maths id="math0003"><math display="block"><msub><mi>VO</mi><mn mathvariant="normal">2</mn></msub><mspace width="1em" /><mi>max</mi><mo mathvariant="normal">=</mo><msub><mi>VO</mi><mn mathvariant="normal">2</mn></msub><mo>/</mo><mi>percent max</mi></math><img file="EP1362430B1_D0003.tif" /></maths>

0261In the above formulas, t is the time to complete a race-level effort in minutes, and v is the speed during the race in meters per minute. Oxygen uptake may be estimated during an athletic effort in substep <b>6152,</b> using the above formula or any other suitable method. VO₂ max may similarly be estimated in substep <b>6166.</b> The system may also estimate the speed, heart rate, or other parameter corresponding to the level of effort at which VO₂ max is reached. If desired, time and speed data may have been entered by the athlete as personal data, or may be measured by the MPN.

0262In substep <b>6158,</b> the system may estimate energy consumed during an athletic effort. Energy consumption may be expressed in calories, and may be estimated based on age, gender, height, and weight, which may be entered as personal data. It may also be estimated based on type of activity, HR, speed, elevation gain, and other factors that may be measured during an athletic effort. Similarly, the power exerted while exercising may be estimated in substep <b>6160.</b>

0263Lactate threshold (LT) may be estimated in substep <b>6164.</b> LT represents the highest level at which exercise may be maintained for an extended period without a buildup of lactate in the blood. It may be measured, for example as a percent of VO₂ max or a percent of MHR above which lactic acid begins to accumulate in the blood. It may be estimated, for example, by using the average heart rate for a maximal athletic effort over a half hour. Alternatively, it may be estimated by measuring heart rate during a series of progressively more difficult efforts, and based on the rate of increase of heart rate between the efforts.

0264In step <b>6170,</b> the estimated secondary parameter may be used to modify an athletic workout. For example, the intensity of a workout may be expressed as percent of LT, and during the workout the system may measure heart rate, estimate LT, and increase or decrease the speed setting of a piece of exercise equipment to maintain the proper level of effort. In step <b>6175,</b> the user may be prompted to modify the level of effort based on an estimate of a secondary performance parameter. For example, the intensity of a workout may be expressed as percent of VO₂ max, and during the workout the system may measure heart rate, estimate VO₂, and prompt the user to speed up or slow down to maintain the proper level of effort. The estimated secondary parameter may also be displayed for the user by the MPN, or it may be uploaded to a base station or personal computer to be stored, displayed, or analyzed.

0265<figref idref="f0072">FIG. <b>62</b></figref> shows illustrative MPN <b>6200</b> that may be used to measure a primary performance parameter and estimate a secondary performance parameter. INC <b>6210</b> may be a control unit or other INC with memory and processing capabilities, and may include software to control the other INCs, as well as to perform the estimation. It may also include memory to hold software, as well as downloaded personal data such as age, gender, and weight. It may also include a communications device to download the personal data. INC <b>6220</b> may be a display INC, on which the primary and secondary performance parameters may be displayed. INC <b>6230</b> may be a heart rate sensor, used for monitoring the athlete's heart rate, which may be a primary performance parameter. INC <b>6240</b> may be an accelerometer for measuring cadence, which may also be a primary performance parameter. INC <b>6250</b> may be an audio output INC, which may be used to prompt the user to modify the level of effort based on the estimated secondary performance parameter. These INCs are merely illustrative, and all INCs are optional.

0266<figref idref="f0073">FIG. <b>63</b></figref> shows illustrative display screen <b>6300</b> that may be displayed by the athlete's personal computer to allow the entry of personal data. It may include entry region <b>6310</b> for entering the athlete's name. It may include entry region <b>6320</b> for entering the athlete's age. It may include entry region <b>6330</b> for entering the athlete's weight. It may include selection <b>6340</b> for entering the athlete's gender. It may include entry region <b>6350</b> for entering the athlete's height. It may include entry region <b>6360</b> for entering the athlete's RHR. It may include entry region <b>6370</b> for entering the athlete's MHR. These fields are merely illustrative. Any suitable personal data may be entered on a screen such as display screen <b>6300.</b> Display screen <b>6300</b> may also include menu bar <b>6380,</b> which may allow the user to perform other functions. Other functions supported may include file-related functions (e.g., loading and storing personal data), device-related functions (e.g., downloading personal data to a device), system-related functions, user-related functions, security-related functions, and help-related functions. These functions are merely illustrative.

0267<figref idref="f0074">FIGs. <b>64A</b> through <b>64F</b></figref> show illustrative display screens that may be displayed by a display INC in an MPN during an athletic effort. <figref idref="f0074">FIG. <b>64A</b></figref> shows screen <b>6410,</b> which may be a prompt for the athlete to go faster, and may be based on an estimated secondary performance parameter. <figref idref="f0074">FIG. <b>64B</b></figref> shows screen <b>6420,</b> which may display the athlete's currently measured heart rate <b>6422,</b> percent of MHR <b>6424,</b> and percent of HRR <b>6426.</b><figref idref="f0074">FIG. <b>64C</b></figref> shows screen <b>6430,</b> which may display the estimated VO₂ max <b>6432,</b> LT <b>6434,</b> and MHR <b>6436</b> at the end of a testing effort. <figref idref="f0074">FIG. <b>64D</b></figref> shows screen <b>6440,</b> which may display the athlete's estimated VO₂ during or after an effort. <figref idref="f0074">FIG. <b>64E</b></figref> shows screen <b>6450,</b> which may display the athlete's cumulative energy consumption for a workout <b>6452</b> and current power exertion <b>6454.</b><figref idref="f0074">FIG. <b>64F</b></figref> shows screen <b>6460,</b> which may show the athlete's current actual percent of HRR <b>6462,</b> the target HRR range for the workout <b>6464,</b> and a prompt to the athlete <b>6466</b> to modify the level of effort based on those values.

0268As described herein, the MPN may be used to collect data, such as heart rate and other athletic data. However, at times the data collection may be unreliable, for example because of interference with the wireless communications between INCs in the MPN. Temporary interference may be common because of nearby electro-mechanical devices, other radio frequency transmitters, poor contact between a metabolic sensor and the skin, and even static electricity between the athlete's body and clothing. One way of handling this is by including memory in the data collection INC, and retransmitting any lost data once the interference is gone. However, this may not be practical, as it may significantly increase the cost of the data collection INC. Also, at times data samples may not be collected successfully by the data collection INC, due to such factors as intermittent connections between the INC and the athlete's body. Therefore, the MPN may include algorithms to recognize invalid data samples and to estimate new values for the invalid samples.

0269<figref idref="f0075">FIG. <b>65</b></figref> shows illustrative MPN <b>6500</b> that may be used to collect data and that may include detection of invalid data and estimation of replacement data for the invalid data. Control unit <b>6520</b> may collect data samples from heart rate monitor <b>6530</b> using wireless communication path <b>6550</b> and store the collected heart rate data in memory in control unit <b>6520.</b> Control unit may display heart rate data on display <b>6540.</b> Control unit <b>6520</b> may detect invalid data received from heart rate monitor <b>6530,</b> perhaps due to a failure in communication path <b>6550,</b> and may estimate replacement data to store and to send to display <b>6540.</b> Collected heart rate data may also be uploaded to personal computer <b>6510</b> and stored there. Personal computer <b>6510</b> may recognize invalid samples, and may estimate replacement data for the invalid data samples. The collected heart rate data, including any estimated replacement data may be displayed on a monitor attached to personal computer <b>6510.</b> INCs shown are merely illustrative. All INCs are optional.

0270<figref idref="f0076">FIG. <b>66</b></figref> shows flow chart <b>6600</b> of an illustrative process for estimating replacement data for invalid collected data. All steps are optional and may be performed in any suitable order. In step <b>6610,</b> data samples, such as athletic performance data samples, may be collected by an MPN. This may be, for example, heart beat data in substep <b>6612,</b> or heart rate data in substep <b>6614.</b> Any suitable type of data may be collected.

0271In step <b>6620,</b> one or more invalid samples may be recognized. The invalid samples may be recognized, for example, by a control unit while data is being collected or by a personal computer after collected data has been uploaded. In substep <b>6621,</b> invalid samples may be recognized on the basis of missing values. In substep <b>6622,</b> invalid samples may be recognized on the basis of zero values, i.e., samples with the value of zero. In substep <b>6623,</b> invalid samples may be recognized on the basis of values outside a defined range, for example, heart rate data lower than the resting heart rate or greater than the maximum heart rate. In substep <b>6624,</b> invalid samples may be recognized on the basis of a rapid change in values, for examples values that indicate a very significant change in heart rate in a very short period of time. In substep <b>6625,</b> invalid samples may be recognized on the basis of values inconsistent with other data, for example significantly different from samples collected before and after, or for example heart rate data inconsistent with collected speed and elevation data.

0272In step <b>6630,</b> replacement values may be estimated for the invalid samples. Replacement values may be interpolated based on valid samples collected before, after, or both before and after the invalid samples in substep <b>6631.</b> Replacement values may be interpolated linearly in substep <b>6632.</b> Replacement values may be interpolated based on the first derivative of valid samples in substep <b>6633.</b> Replacement values may be interpolated linearly based on the first derivative in substep <b>6634.</b> Replacement data may be interpolated using a quadratic equation in substep <b>6636.</b> Replacement data may be interpolated using a polynomial equation in substep <b>6638,</b> and may match the values and/or derivatives of valid samples at the end points of the interpolation range. The data may also be estimated based on data collected in previous sessions under similar conditions, for example, the rate of change of the data may be made to match the rate of change of data collected in the similar session.

0273In step <b>6640,</b> the data samples may be listed, for example on personal computer <b>6510</b> (<figref idref="f0075">FIG. <b>65</b></figref><b>).</b> In substep <b>6642,</b> estimated samples may be indicated in the listing. In step <b>6645,</b> the data samples may be graphed, for example on personal computer <b>6510.</b> In substep <b>6647,</b> estimated samples ranges may be indicated in the graph. In step <b>6650,</b> secondary data may be derived from the collected data. In step <b>6652,</b> the secondary data may be listed, for example on personal computer <b>6510.</b> In substep <b>6654,</b> secondary data values derived from estimated samples may be indicated in the listing. In step <b>6656,</b> the secondary data may be graphed, for example on personal computer <b>6510.</b> In substep <b>6658,</b> secondary data values derived from estimated samples ranges may be indicated in the graph.

0274<figref idref="f0077">FIG. <b>67</b></figref> shows an example <b>6700</b> of heart beat data that may have been collected by an MPN. The data may include samples <b>6705</b> through <b>6740.</b> It may be seen that each sample is approximately 0.5 seconds after the previous, with the exception of sample <b>6725.</b> This sample was collected almost three seconds after the previous sample, indicating that samples were likely lost. By interpolation, it may be estimated that five samples were missed, and the user's heart rate may be estimated at about 122 beats per minute during this time by dividing the number of samples by the time.

0275<figref idref="f0078">FIGs. <b>68A</b> and <b>68B</b></figref> illustrate how samples may be estimated to replace invalid samples. <figref idref="f0078">FIG. <b>68A</b></figref> shows illustrative heart rate sample data <b>6800</b> that may have been collected at a regular interval, such as every 15 seconds. In this example, heart rate data is increasing at a rate of eight beats per minute per minute in first sample range <b>6805.</b> Heart rate data samples are all zero and are assumed to be invalid in second sample range <b>6810.</b> Heart rate data is increasing at a reduced rate of four beats per minute per minute in third sample range <b>6815.</b> Heart rate data samples are all out of range and are assumed to be invalid in fourth sample range <b>6820.</b> And heart rate data is decreasing at a rate of one beat per minute per minute in fifth sample range <b>6825.</b>

0276<figref idref="f0078">FIG. <b>68B</b></figref> shows how replacement values may be created for the invalid samples, creating revised heart rate sample data <b>6830.</b> Range <b>6835,</b> which corresponds to range <b>6810</b> in the original data, has been filled using a linear interpolation between samples collected just prior to and just after the invalid data in range <b>6810.</b> Similarly, range <b>6840,</b> which corresponds to range <b>6820</b> in the original data, has been filled using a linear interpolation between samples collected just prior to and just after the invalid data in range <b>6820.</b>

0277<figref idref="f0079">FIG. <b>69A</b></figref> shows illustrative display screen <b>6900,</b> which lists and graphs collected sample heart rate data. Sample data list <b>6905</b> may include estimated samples <b>6910.</b> Estimated samples may be marked as estimated, for example with an asterisk. The sample data may also be shown in graph <b>6915.</b> Range <b>6920</b> of the graph, corresponding to the estimated data, may be drawn with a different line style to indicate that the samples were estimated.

0278<figref idref="f0079">FIG. <b>69B</b></figref> shows illustrative display screen <b>6950,</b> which lists and displays average heart rate data derived from the collected heart rate data samples. Data list <b>6955</b> may include data point <b>6960</b> and <b>6970</b> derived from estimated samples. Estimated data may be marked as estimated, for example with an asterisk. The derived data may also be shown in graph <b>6965.</b> Values <b>6960</b> and <b>6970</b> on the graph, corresponding to the data derived from estimated samples, may be marked, for example with an asterisk, to indicate that data is estimated.

0279An MPN may also be used to provide an athlete, such as a runner or walker, with cadence information and stride length information. <figref idref="f0080">FIG. <b>70</b></figref> shows flow chart <b>7000</b> of an illustrative process for providing this information. All steps are optional and may be performed in any suitable order. In step <b>7010,</b> an accelerometer may be provided as an INC in the MPN. The accelerometer may send acceleration data to a control unit or other INC with storage capabilities at regular intervals. If desired, multiple accelerometers may be used to measure motion by different parts of the body, or components of motion in different directions. In step <b>7020,</b> the accelerometer may be worn by the user. For example, it may be worn on the leg in substep <b>7022,</b> the foot in substep <b>7024,</b> the arm in substep <b>7026,</b> or the hand in substep <b>7028.</b> In step <b>7030,</b> the accelerometer may be used to measure cadence. For example, a control unit may collect the data from the accelerometer, and measure the frequency at which the data reaches its relative maximums and minimums. This may correspond to the rate at which the user is swinging his or her arms or moving his or her legs, which translates directly to cadence.

0280In step <b>7040,</b> a position monitor may be provided as an INC in the MPN. The position monitor may be a GPS monitor in substep <b>7042.</b> The position monitor may send position data to a control unit or other component with storage capabilities at regular intervals. The position monitor may also be worn by the user. In step <b>7050,</b> the position monitor may be used to measure the user's speed, which can be calculated as distance traveled divided by time. In step <b>7060,</b> stride length may be calculated based on the speed and cadence of the user. In substep <b>7062,</b> the stride length may be calculated as speed divided by cadence. If desired, the units of stride length displayed to the user may be converted to feet, meters, or other appropriate units. If desired, any of speed, cadence, and stride length may be displayed for the user. <figref idref="f0057">FIG. <b>45G</b></figref> shows an example of how cadence may be displayed on a display INC in the MPN. <figref idref="f0057">FIG. <b>45H</b></figref> shows an example of how stride length may be displayed on a display INC in the MPN. If desired, any of speed, cadence and stride length may be recorded for the duration of a session, and uploaded to a personal computer or base station for storage, display, or analysis. <figref idref="f0056">FIG. <b>44</b></figref> shows illustrative MPN <b>4400</b> that may be used to calculate and display cadence and stride length.

0281A significant impact on athletic performance is the loss of certain valuable consumables by the athlete during a training or competition event. For example, as the user continues at a high level of exertion, levels of water, sodium, carbohydrates, and other nutrients will decrease, and performance will correspondingly decrease. As levels decrease further, performance levels will decrease at an even higher rate, until the athlete is no longer able to continue. However, if the athlete consumes too much of any of these consumables, performance will also suffer, with conditions such as stomach distress and cramping, hyponatremia, and hypernatremia. The MPN can be used to measure the usage or loss of such consumables, and provide the athlete with reminders to take in specific amounts of one or more of them. <figref idref="f0081">FIG. <b>71</b></figref> shows flow chart <b>7100</b> of an illustrative process for providing consumption reminders to an athlete. All steps are optional and may be performed in any suitable order.

0282In step <b>7110,</b> metabolic data may be collected from a user such as an athlete. For example, an INC in an MPN may include a sensor to measure a specific metabolic value. In substep <b>7112,</b> heart rate data may be collected. In substep <b>7114,</b> skin resistance data may be collected. In substep <b>7116,</b> body temperature data may be collected. In substep <b>7118,</b> blood pressure data may be collected. In step <b>7120,</b> the loss of a consumable may be estimated based on the metabolic data. For example, water may be estimated in substep <b>7122,</b> carbohydrates in substep <b>7124,</b> and sodium in substep <b>7126.</b> A rate of loss of each consumable based on level of effort indicated by heart rate may be used. Skin resistance may be used to measure the amount of sweat, which translates to water and sodium loss. An increasing body temperature or blood pressure may indicate a significant loss of water. Need may also be estimated based on information stored about the athlete, such as weight or gender. In step <b>7130,</b> time may be measured since the most recent reminder, and the time may be used to refine the estimate of lost consumables. In step <b>7140,</b> the MPN may include an INC to measure the amount of consumable, such as energy drink or water, carried by the user. The measured amount may be reported to the user. Additionally, the measured amount may be used to calculate the amount previously consumed by the user, and may be used to refine the estimate of needed consumables. In step <b>7150,</b> the user may be reminded to consume a consumable based on the estimated loss. In substep <b>7152,</b> the reminder may be presented when the loss or usage reaches a defined amount. In substep <b>7154,</b> the user may be told a specific amount of the consumable to consume. In substep <b>7156,</b> the user may be given an audible reminder. In substep <b>7158,</b> the user may be given a visual reminder.

0283<figref idref="f0082">FIG. <b>72</b></figref> shows illustrative MPN <b>7200</b> that may be used to provide consumable reminders to an athlete. INC <b>7210</b> may be a control unit, which may include memory for storing input data samples, a processor for estimating consumable loss, and a wireless communications device for receiving metabolic data and sending reminders to the user. INC <b>7220</b> may be a metabolic data monitor, such as a skin resistance monitor, body temperature monitor, or blood pressure monitor. INC <b>7230</b> may be an audio output INC for providing audible reminders. INC <b>7240</b> may be a display INC for providing visual reminders. INC <b>7250</b> may be a device capable of measure the volume of consumable in, for example, a bladder worn by the user. INC <b>7260</b> may be a heart rate monitor. INCs shown are merely illustrative and are optional in practice.

0284<figref idref="f0083">FIG. <b>73</b></figref> shows illustrative display screen <b>7300</b> that may be provided on display INC <b>7240</b> (<figref idref="f0082">FIG. <b>72</b></figref><b>).</b> Prompt <b>7310</b> may tell the user to consume a specific amount of consumable, in this case four ounces of sports drink. Information display <b>7320</b> may tell the user how much sports drink is remaining. Display <b>7330</b> may inform the user that a salt pill should be taken in 15 minutes.

0285An MPN may be used by a swimmer to provide swimming-related information, such as lap counts. This is illustrated in flow chart <b>7400</b> of <figref idref="f0084">FIG. <b>74</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>7410,</b> the MPN may include a monitor, such as a flow meter, which may be worn by the swimmer in a swimming pool. Other examples of monitors that may be used include a turbulence meter, or an accelerometer to measure arm or leg movements. Preferably, the monitor should provide data with one characteristic while swimming and another characteristic while turning. If desired, multiple monitors may be worn, of the same or different types. In step <b>7415,</b> the monitor may be used to measure a parameter, such as rate of flow of water past the user's body, amount of water turbulence near the user's body, arm movements, or leg movements. In step <b>7420,</b> a characteristic of the parameter may be evaluated. For example, one characteristic of the flow may be the irregular readings during the turbulence of the turn at the end of the pool, as opposed to the more cyclical readings seen while swimming. Water flow may maintain a fairly constant positive value while swimming, and may vary in rate and direction while turning. Arm or leg movements may have different characteristics while swimming various strokes, while kicking, while turning, or while resting. Arm or leg movements may be regular and cyclical while swimming, and irregular while turning or resting. If desired, multiple characteristics of the measurement may be evaluated to determine which of several strokes is being used. In step <b>7425,</b> transitions between the two values or characteristics may be counted. In step <b>7430,</b> the count of transitions may be used, to provide a lap count. If desired, more than two characteristics of the parameter may be measured. For example, a third characteristic may be seen while the swimmer rests at the end of the pool. Also, different characteristics may be seen when the swimmer performs different strokes. For example, a system in which an athlete wears a water flow meter and a single accelerometer on one wrist can be used to detect the difference between swimming the crawl, breaststroke, backstroke, butterfly, and kicking.

0286In step <b>7440,</b> the duration of the two or more characteristics may be measured, and this measurement may be used to provide a lap time in step <b>7445.</b> If desired, the measured lap time may be compared with a typical lap time in step <b>7450,</b> and validated that it falls within a normal range. For example, if two consecutive measured lap times are much less than the typical lap time, the user may have paused in the middle of a lap. Similarly, the turn time may be measured in step <b>7460,</b> and may be validated in step <b>7465.</b> Typical lap times and typical turn times may be standard values, they may be entered by the swimmer, they may be measured during a calibration swim, or they may be entered in any other suitable way. In a calibration swim, for example, the swimmer may swim a small number of laps of each stroke, while the system measures the characteristics of the data collected by the monitor and measures the typical lap times. Based on the data collected during a swim workout, the system may construct a model of the entire workout, including each swim, with type of stroke, speed, and distance for each swim, duration of rest periods, and other data. The data from the model may be stored, displayed, graphed, analyzed, or processed in any other suitable manner.

0287<figref idref="f0085">FIG. <b>75</b></figref> shows illustrative MPN <b>7500</b> that may be used to provide lap swimming information. INC <b>7510</b> may combine the functions of a control unit and a flow meter, and may be configured to be worn attached to the swimsuit. INC <b>7520</b> may combine the functions of a display and an accelerometer and may be configured to be worn on the wrist. INC <b>7530</b> may be an audio output INC, and may be configured to be worn attached to a goggle strap or swim cap. INC <b>7540</b> may be an input INC worn on the foot, and it may be operated by tapping the end or bottom of the pool. INCs shown are merely illustrative and are optional in practice.

0288<figref idref="f0086">FIG. <b>76A</b></figref> shows an example of a screen <b>7600</b> that may be displayed on display INC <b>7520</b> (<figref idref="f0085">FIG. 75</figref>) to provide distance information to the swimmer. For example, the swimmer may have configured the system with the length of the pool, and the MPN may convert a lap count into a total distance <b>7605</b> for display. Screen <b>7610</b> of <figref idref="f0086">FIG. <b>76B</b></figref> may be provided on display INC <b>7520</b> at the conclusion of a swim. It shows the distance of the swim <b>7612</b> which may have been derived from the measured lap count. It shows the swim stroke <b>7615,</b> which may be determined automatically based on the characteristic of data measured by input INC <b>7510</b> and <b>7520</b> (<figref idref="f0085">FIG. <b>75</b></figref><b>).</b> Screen <b>7610</b> also includes total swim time <b>7620,</b> which may be measured by the system.

0289<figref idref="f0087">FIG. <b>77</b></figref> shows illustrative display screen <b>7700</b> which may be shown on a monitor attached to a personal computer, after data has been uploaded from INC <b>7510</b> (<figref idref="f0085">FIG. <b>75</b></figref><b>)</b> of the MPN. Date and time of workout <b>7710</b> may be displayed, and may have been determined automatically by a clock embedded in INC <b>7510.</b> Distance <b>7720</b> may be listed for each swim, along with stroke <b>7722</b> and time <b>7724.</b> Rest times <b>7726</b> may also be listed. The user may be allowed to scroll through more data, using scroll bar <b>7730.</b> Other functions may be available using menu bar <b>7740.</b> Other functions may include file-related functions (e.g., loading and saving data sets), data-related functions (e.g., viewing different subsets of data, or viewing the data in different formats or units), profile-related data (e.g., defining the length of the pool, typical swim times, etc.), history-related functions (e.g., comparing performance between swim sessions), and help-related functions.

0290An MPN may be used to provide form or gait feedback to an athlete or other user. Through the use of one or more accelerometers mounted on a part of the body that is moved during a particular activity, the system may compare the measured movements with ideal movements, and provide feedback to the user. An example of such a process is shown in flow chart <b>7800</b> of <figref idref="f0088">FIG. <b>78</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>7810,</b> a user may be allowed to wear an accelerometer, which may be included in an INC of an MPN. It may be worn on a part of the body that is moved, intentionally or unintentionally, during an activity for which the user desired form feedback. For example, it may be worn on a foot, leg, hand, arm, or wrist. Any other suitable part of the body may also be monitored. In step <b>7815,</b> multiple accelerometers may be worn by the user. Multiple accelerometers may be worn on a single part of the body, for example to provide validation of readings, or to provide readings of different components of motion in different directions. Accelerometers may be worn on corresponding parts of the body, on opposite sides, such as opposite arms or legs, for example to monitor symmetry of motion. Accelerometers may be worn on different parts of the body, such as an arm and a leg, for example to monitor different motion aspects of an activity.

0291In step <b>7820,</b> the user may be allowed to wear the accelerometer or accelerometers during a training activity. For example, one or more accelerometers may be worn while running in substep <b>7821,</b> walking in substep <b>7822,</b> swimming in substep <b>7823,</b> bicycling in substep <b>7824,</b> rowing, during a physical therapy activity in substep <b>7825,</b> or during any other suitable activity. In step <b>7830,</b> characteristics of desired movements of the monitored part or parts of the body may be stored. For example, the characteristics may have been captured by an expert in the activity wearing one or more accelerometers in the same location or locations. Alternatively, the characteristics may have been generated by monitoring multiple users and averaging the results, or by calculating optimum characteristics theoretically. If desired, the characteristics of desired motions may be stored in a personal computer, or they may be downloaded into memory in an INC of the MPN. If desired, a coach or physical therapist may wear the accelerometer or accelerometers and demonstrate the motion, while the MPN captures the characteristics of the coach's motions or therapist's motions.

0292In step <b>7835,</b> data from the accelerometer or accelerometers may be collected during the training activity. If desired, the collected accelerometer data may be uploaded from the MPN into a personal computer. In step <b>7840,</b> the system may compare the collected accelerometer data with the stored characteristics of desired motion. This comparison may be performed in the MPN, for example using a control unit, or it may be performed using a personal computer to which the data was uploaded. In step <b>7845,</b> the comparison may be used to evaluate the user's form during the training activity, for example to determine incorrect aspects of the user's form. For example, while running, incorrect form may include over-striding, under-striding, lifting the feet too high, crossing the arms excessively in front of the body, or any other suitable type of incorrect form. Feedback on incorrect form may be provided to the user during the activity in step <b>7850.</b> This may be audible feedback, for example using an audio output INC, and may be synthesized voice. The feedback may be visual feedback, for example using a display INC. In step <b>7855,</b> feedback may be provided to the user after the training activity has been completed, for example using a personal computer. The raw data may be collected and uploaded to the personal computer, which may provide the comparison to create the feedback. Alternatively, the comparison may be performed in an INC of the MPN, and the results of the comparison may be collected and uploaded to the personal computer. The feedback may be in the form of a chart, table, or graph, it may be displayed or printed, or it may be presented in any other suitable form. Form feedback data may be combined with other suitable data when displayed, such as time, speed, or percent grade uphill or downhill. In step <b>7860,</b> the collected data or the form feedback may be transmitted to a coach or physical therapist, for example over a network such as the Internet, and the coach or physical therapist may view the data or feedback.

0293<figref idref="f0089">FIG. <b>79</b></figref> shows an example of an MPN <b>7900</b> that may be used to provide form feedback based on accelerometer data collected during a training activity. INC <b>7930</b> may be a control unit. The control unit may include a processor to control the data collection and to perform the form comparison. It may also include memory to store desired form characteristics and collected data. It may also include a wireless communications device for collecting accelerometer data and for providing form feedback. INC <b>7920</b> may be an accelerometer mounted on the left wrist, for measuring movements of the left arm. INC <b>7910</b> may be a display INC for providing visual feedback to the user. If desired, a display INC and an accelerometer may be combined into a single INC. INC <b>7940</b> may be an audio output INC, for providing audible form feedback. INCs <b>7950</b> may be accelerometers worn on the feet for measuring movements of the legs and feet. If desired, accelerometers may be worn on any part of the body, and may be combined with any other INC. If desired, an accelerometer may be worn on a part of the body that is not expected to move, and the system may use it to detect incorrect motions by that part of the body. INCs shown are merely illustrative and are optional in practice.

0294<figref idref="f0090">FIGs. <b>80A</b> through <b>80C</b></figref> show examples of screens that may be shown on display INC <b>7910</b> (<figref idref="f0089">FIG. <b>79</b></figref><b>)</b> during a training activity such as running or walking, to provide form feedback to a user. Screen <b>8010</b> of <figref idref="f0090">FIG. <b>80A</b></figref> may suggest that the user shorten his or her stride, if the collected data indicates a stride length longer than the desired stride length. Screen <b>8020</b> of <figref idref="f0090">FIG. <b>80B</b></figref> may suggest that the user relax his or her shoulders. Tightly held shoulders may be inferred, for example, based on the range of motion measured from the arms. Screen <b>8030</b> of <figref idref="f0090">FIG. <b>80C</b></figref> may suggest that the user run with less bounce, for example if the collected data indicates too much vertical motion. Any suitable type of feedback may be provided for any suitable characteristic of the training activity. Any suitable training activity may be monitored. Feedback may be provided audibly during the training activity if desired, for example using audio output INC <b>7940</b> (<figref idref="f0089">FIG. <b>79</b></figref><b>).</b>

0295Screen <b>8100</b> of <figref idref="f0091">FIG. <b>81</b></figref> is an illustrative example of a display screen that may be displayed after a training activity on a personal computer, to provide form feedback on the training activity. The screen may be displayed for the user (e.g., athlete or physical therapy patient) or may be displayed for a coach, physical therapist or other interested party. Graph <b>8110</b> may include curve <b>8120</b> of ideal motions, and curve 8130 of actual motions. This type of graph may illustrate the parts of the user's motions that vary from the ideal motions. If desired, multiple types of curves may be shown on the same graph. For example, the forward component of the motion may be represented using one curve, and the side-to-side component of the motion may be represented using a second curve. As another example, motions of both legs or of both arms may be shown on a single graph, or motions of an arm and a leg may be shown on the same graph. Legend <b>8140</b> may illustrate the line styles of the various curves. Menu bar <b>8150</b> may provide access to various functions, such as file-related functions (e.g., saving or loading collected data files or loading a file with a different set of ideal characteristics), session-related functions (e.g., looking at data from different training sessions), data-related functions (e.g., looking at data collected using different accelerometers during a single session), or help-related functions.

0296An MPN may be used to provide an athletic training journal. <figref idref="f0092">FIG. <b>82</b></figref> shows flow chart <b>8200</b> of an illustrative process for providing an athletic training journal. All steps are optional and may be performed in any suitable order. In step <b>8210,</b> a mobile electronic journal may be provided, for example as described earlier in connection with <figref idref="f0053">FIG. <b>42</b></figref><b>.</b> In step <b>8220,</b> the journal may include an exercise database. For example, the exercise database may include a list of different types of exercises, and may include characteristics of each, such as calories burned per hour at different intensities or muscle groups trained. The exercise database may also include data on recommended levels, types, and amounts of exercise. In step <b>8230,</b> the journal may include a nutrition database. For example, the nutrition database may include a list of different types of foods, and characteristics of each, such as calories, amount of fat, carbohydrates, protein, and other nutrients. The nutrition database may also include data on recommended amounts of various types of nutrients. In step <b>8240,</b> the journal may include a competition database. The competition database may include lists of competitions of various types of activities, results, times, and other information. In step <b>8250,</b> the journal may include a personal database. The personal database may include data on the user's own exercise needs or plans, the user's own nutrition needs, the user's own competition history or goals, or other suitable user data. It may include data on the user's weight, body fat percentage, waist measurement, and other suitable health measurements. In step <b>8260,</b> the journal may include an athletic data collection INC. For example, it may include a heart rate monitor, a blood pressure monitor, a stopwatch, or other INC that may be used to measure athletic performance. In practice, the user may enter journal entries related to exercise, nutrition, competition, health, and other related items. For example, the user may log foods eaten, exercises performed, competitions entered, and other items of interest. If desired, journal entries may be linked to suitable database entries. The journal may make automatic calculations related to the journal entry and the database, such as calories consumed or burned, nutrition taken in or needed, etc. Journal entries may also be linked to audio or video media files, clock data, position data, or other suitable information.

0297As described in step <b>3255</b> of flow chart <b>3200</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> an MPN may be used to provide physical therapy functions. This is illustrated in more detail in <figref idref="f0092">FIG. <b>83</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>8310,</b> the MPN may be used to measure range of motion. For example, a range of motion monitor may be one of the INCs in the MPN. In step <b>8320,</b> the MPN may be used to measure gait or do gait analysis. For example, the form feedback functions described previously in conjunction with <figref idref="f0088">FIG. <b>78</b></figref> may be used. In step <b>8330,</b> the MPN may be used to test muscle strength. For example, a muscle-strength tester may be incorporated into an INC of the MPN. In step <b>8340,</b> the MPN may be used to measure changes in a user's physical capabilities. This may be done, for example, using the functions of the mobile electronic journal described in conjunction with <figref idref="f0053">FIG. <b>42</b></figref><b>.</b> If desired, the mobile electronic journal used for physical therapy purposes may include a patient database, a treatment database, an insurance database, a diagnostic database, a range of motion sensor, accelerometers to be used for form feedback, a muscle strength tester, or other appropriate INCs.

0298As described in step <b>3215</b> of flow chart <b>3200</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> an MPN may be used to provide medical functions. This is illustrated in more detail in <figref idref="f0093">FIG. <b>84</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>8410,</b> an INC may be worn or carried by a doctor, patient or nurse, mounted on equipment such as a wheelchair, or implanted, ingested, or injected into a patient. Any suitable method of providing a portable medical INC may be used. In step <b>8420,</b> an INC of the MPN may be used to measure a metabolic value of a patient. This may include heart rate in substep <b>8421,</b> blood oxygen level in substep <b>8422,</b> body temperature in substep <b>8423,</b> skin resistance in substep <b>8424,</b> breath rate in substep <b>8425,</b> blood pressure in substep <b>8426,</b> blood sugar level in substep <b>8427,</b> or any other suitable metabolic parameter. In step <b>8430,</b> the MPN may be used to automatically detect a medical problem. In step <b>8440,</b> the MPN may control a medical device, such as a treatment device. The medical device may be an INC in the MPN, or an INC in the MPN may send commands to the device. In substep <b>8445,</b> the MPN may control a syringe pump. In step <b>8450,</b> the MPN may provide emergency communications, such as an alert to emergency medical personnel. In step <b>8460,</b> the MPN may provide storage of medical records. In step <b>8465,</b> the MPN may provide storage of insurance information. In step <b>8470,</b> the MPN may store a medical database, such as a treatment database, diagnostic database, pharmaceutical database, medical instrument database, or health alert database. In step <b>8480,</b> the MPN may provide a medical journal.

0299<figref idref="f0094">FIG. <b>85</b></figref> shows flow chart <b>8500</b> of an illustrative process for using a measured metabolic parameter to detect a medical problem. All steps are optional and may be performed in any suitable order. In step <b>8510,</b> a metabolic parameter of the user may be measured, for example by an INC of the MPN. This may include measuring heart rate in substep <b>8511,</b> blood oxygen level in substep <b>8512,</b> body temperature in substep <b>8513,</b> skin resistance in substep <b>8514,</b> breath rate in substep <b>8515,</b> blood pressure in substep <b>8516,</b> blood sugar level in substep <b>8517,</b> or any other suitable metabolic parameter that may be measured using a portable system. In step <b>8520,</b> the system may use the measured metabolic parameter to estimate a medical problem. Other factors may also be used to estimate the medical problem, such as information stored about the user, level and time of exertion, water and other substances consumed, or other suitable data. Estimating a medical problem may include detecting a medical problem, predicting a medical problem, or estimating the likelihood that the medical problem exists or will occur. For example, the system may estimate the likelihood that the user is affected with dehydration in substep <b>8521,</b> hyponatremia in substep <b>8522,</b> a heat injury in substep <b>8523,</b> heat cramps in substep <b>8524,</b> heat exhaustion in substep <b>8525,</b> heatstroke in substep <b>8526,</b> heart attack in substep <b>8527,</b> hypoglycemia in substep <b>8528,</b> hyperglycemia in substep <b>8529,</b> insulin shock, diabetic coma, or any other medical problem.

0300The system may take an action to address the estimated medical problem in step <b>8530.</b> For example, a prompt may be provided to the user, visually or audibly, in step <b>8540.</b> That may include a prompt to drink in substep <b>8541,</b> a prompt to consume sodium in substep <b>8542,</b> a prompt to slow down in substep <b>8543,</b> a prompt to cease activity in substep <b>8544,</b> a prompt to eat in substep <b>8545,</b> a prompt to take insulin in substep <b>8546,</b> a prompt to take medication in substep <b>8547,</b> a prompt to seek emergency medical attention in substep <b>8548,</b> or any other suitable prompt. If desired, the system may send an alert message in step <b>8550.</b> For example, a radio frequency message may be sent to emergency medical personnel. In step <b>8560,</b> an audible alert may be sounded. If desired, the action may include control of a medical treatment device, such as a portable syringe pump, an implanted defibrillator, or other suitable device.

0301<figref idref="f0095">FIG. <b>86</b></figref> shows more detail of step <b>8480</b> (<figref idref="f0093">FIG. <b>84</b></figref><b>),</b> providing a mobile electronic medical journal. All steps are optional and may be performed in any suitable order. In step <b>8610,</b> a mobile electronic journal may be provided as described earlier with reference to <figref idref="f0053">FIG. <b>42</b></figref><b>.</b> In step <b>8620,</b> a treatment database may be provided, which may provide information about different types of medical treatments. A diagnostic database may be provided in step <b>8625,</b> and may contain information about different medical diagnoses. A patient database may be provided in step <b>8630,</b> and may include information about patients of a medical provider, such as medical history, previous diagnoses, previous treatments, family medical history, risk factors, insurance and payment information or other suitable types of information. In step <b>8635,</b> a pharmaceutical database may be provided, and may include information about various drugs, including indications for use, recommended dosage, side effects, availability, and other suitable drug information. In step <b>8640,</b> an insurance database may be provided, and may include information about different insurance providers, such as types of policies, payment histories, covered expenses, and other suitable information. A medical instrument database may be provided in step <b>8645,</b> and may include information about various medical instruments, their uses, risks, and other related data. A health alert database may be provided in step <b>8650,</b> and may include information about current and recent health alerts, such as may be issued by public agencies like the Centers for Disease Control. Any journal entry may be linked to one or more elements from one or more of the included databases. Each journal entry may have one or more linked images or video clips. Medical images such as x-rays, CAT scans, MRIs, bone scans and the like, may also be input and linked to journal entries. Each journal entry may also have one or more audio clips, such as a doctor's dictation. The dictation may be translated into text using voice recognition software if desired. The journal may include a medical diagnostic instrument in step <b>8660,</b> and a journal entry may be linked to one or more readings from the instrument. The journal may include a medical treatment device in step <b>8670.</b> Any journal entry may be linked to a usage report of the treatment device.

0302<figref idref="f0096">FIG. <b>87</b></figref> shows an illustrative block diagram of a mobile electronic medical journal <b>8700.</b> Journal <b>8700</b> may include processor <b>8710,</b> which may, for example, be in a control unit. Image memory <b>8712</b> for holding images and other user data and library memory <b>8714</b> for holding one or more databases may also be included in the control unit if desired, and if desired may be the same memory. Digital camera <b>8720</b> may be provided. It may be capable of capturing video still images to link to journal entries. If desired it may also be capable of capturing video clips for the journal entries. Communications device <b>8730</b> may be used for downloading database information and uploading journal entries. Text input INC <b>8740,</b> drawing pad/touch screen input <b>8742,</b> and voice input INC <b>8744</b> may be provided to allow text, drawing, and voice portions of a journal entry respectively. If desired, voice input INC <b>8744</b> may also include a voice recognition capability. A device such as a scanner may also be included to input medical images. Clock <b>8750</b> may be provided to tag journal entries with the current time. Medical device <b>8752</b> may be included to perform a medical function, and may be either a medical diagnostic/input device or a medical treatment device. If desired, multiple medical devices may be included. Display <b>8760</b> may also be provided to view journal entries, database information, and other data. If desired, an audio output INC, not shown, may be provided. INCs may be separate devices, or may be combined in any suitable fashion. All INCs shown are merely illustrative and are optional.

0303<figref idref="f0097">FIG. <b>88</b></figref> shows more detail of step <b>3260</b> of <figref idref="f0044">FIG. 32</figref>, providing features for a disabled user. All steps are optional and may be performed in any suitable order. In step <b>8810,</b> Braille may be output for a visually impaired user. For example, an INC may include an output device capable of generating Braille characters. In step <b>8820,</b> audio may be output for a visually impaired user, in addition to or instead of a visual output. This may include speech generation. In step <b>8830,</b> information may be output visually for a hearing impaired user, in addition to or instead of an audible output. In step <b>8835,</b> voice input may be translated into a visual input for a hearing impaired user. For example, the MPN may include an audio input INC to accept a voice input that the user wishes to have translated. The system may use voice recognition to provide a visual display, which may be, for example, text or sign language. In step <b>8840,</b> voice input may be accepted from a physically impaired user. In step <b>8850,</b> breath input may be accepted from a physically impaired user. This may include allowing a user to input commands to the MPN by blowing into a tube. In step <b>8860,</b> one or more INCs may be configured to be mounted on a wheelchair or other device used by a disabled user.

0304As described in step <b>3265</b> of <figref idref="f0044">FIG. 32</figref>, an MPN may be used by a traveler to provide travel-related functions. This is illustrated in more detail in <figref idref="f0098">FIG. <b>89</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>8902,</b> the system may provide language translation. It may translate from the user's language to a second language, or from a second language to the user's language. Input may be text or it may be spoken with voice recognition. Output may be text, spoken with speech generation, or both. Translation may be based on a local dialect or local slang. In step <b>8904,</b> the system may provide currency conversion. It may convert home currency to travel currency, or travel currency to home currency. In step <b>8906,</b> the system may provide time zone conversion. It may allow the display of time in the local time zone, in the home time zone, or any other time zone. In step <b>8910,</b> the MPN may monitor the user's position, for example using a GPS monitor. Information on the user's position may be provided to the user in step <b>8912.</b> In step <b>8914,</b> the system may provide guidance to the user based on the user's location. In step <b>8916,</b> the system may provide the user with information about a geographical region. This may include geographical information, local customs, laws, tipping guidelines, and other suitable local information. In step <b>8920,</b> the system may provide directions to a local business or attraction, which may be based on the user's location. In step <b>8922,</b> a discount with a local business may be provided. In step <b>8924,</b> an advertisement for a local business may be provided to the user. In step <b>8930,</b> information may be provided about local flora and/or fauna. In step <b>8932,</b> the system may assist the user in identifying local wildlife. In step <b>8940,</b> the system may allow the user to maintain a travel journal. In step <b>8950,</b> the system may provide weather information, such as a local weather forecast. In step <b>8952,</b> the system may provide a transit schedule, such as an airline schedule to or from a travel location, local train and bus schedules, and the like. In step <b>8954,</b> the system may provide a local entertainment schedule. In step <b>8956,</b> the system may allow the user to track expenses, for example in either local or home currency. The system may accept text input in step <b>8960,</b> voice input in step <b>8962,</b> video input in step <b>8964,</b> still image input in step <b>8966,</b> sketch pad input in step <b>8968,</b> or any other suitable form of user input. In step <b>8970,</b> the system may be customized to a specific geographical region. For example, prior to a trip, a user may enter the destination or destinations into a software application running on a personal computer. Suitable information for the specific region or regions may be downloaded over a network such as the Internet, and may be downloaded into an INC of the electronic travel journal, such as a control unit. Suitable information may include local language and dialect translation dictionaries, currency exchange rates, time zone information, information about a location, businesses, customs, laws, geography, wildlife, flora, climate information and weather forecasts, local transit schedules, local entertainment schedules, and any other suitable local information. If desired, local information may be updated while traveling, for example by connecting one of the INCs to a connection such as an Internet connection.

0305<figref idref="f0099">FIG. <b>90</b></figref> shows a block diagram of illustrative MPN <b>9000</b> that may be used while traveling. MPN may include processor <b>9010,</b> which may, for example, be part of a control unit. Image memory <b>9012</b> may be used for storing video images and other user inputs. Database memory <b>9014</b> may be used to store downloaded data. Image memory <b>9012</b> and database memory <b>9014</b> may be the same memory, and may be part of a control unit. Digital camera <b>9020</b> may be provided. It may be capable of capturing video still images. If desired it may also be capable of capturing video clips. Communications device <b>9030</b> may be used for downloading data into database memory <b>9014,</b> and for uploading user data form image memory <b>9012.</b> Text input INC <b>9040,</b> drawing pad/touch screen input <b>9042,</b> and voice input INC <b>9044</b> may be provided to allow text, drawing, and voice input for travel features, respectively. If desired, voice input INC <b>9044</b> may also include a voice recognition capability. Clock <b>9050</b> may be provided to tag user entries with the current time, and to provide a user time display. GPS monitor <b>9052</b> may be included to provide location information in support of travel features. Display <b>9060</b> may also be provided to view information. If desired, an audio output INC, not shown, may be provided. INCs may be separate devices, or may be combined in any suitable fashion.

0306Step <b>8940</b> (<figref idref="f0098">FIG. <b>89</b></figref><b>),</b> providing a travel journal, is described in more detail in <figref idref="f0100">FIG. <b>91</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. In step <b>9110,</b> a mobile electronic journal may be provided, for example as described in conjunction with <figref idref="f0053">FIG. <b>42</b></figref><b>.</b> The travel journal may be configured, for example, as the MPN shown in <figref idref="f0099">FIG. <b>90</b></figref><b>.</b> Any suitable travel database or databases may be included and stored in database memory <b>9014.</b> For example, a database of local businesses may be provided in step <b>9120.</b> A database of local attractions may be provided in step <b>9121.</b> A database of local parks may be provided in step <b>9122.</b> A database of local plants may be provided in step <b>9123.</b> A database of local animals may be provided in step <b>9124.</b> A database of local geology may be provided in step <b>9125.</b> A database of local customs may be provided in step <b>9126.</b> Any other suitable travel data may also be included. The database or databases may be downloaded into the database memory prior to a trip, based on the planned destination or destinations. If desired, any database may be updated during a trip, for example using communications device <b>9030</b> to connect to a network such as the Internet. Any journal entry may be allowed to link to one or more database elements from any of the supported databases. The travel journal may also provide any other suitable travel function or functions, such as language translation in step <b>9130,</b> currency conversion in step <b>9132,</b> time zone conversion in step <b>9134,</b> route guidance in step <b>9136,</b> electronic guidebook features (e.g., information about local customs, businesses, attractions, etc.) in step <b>9138,</b> advertisements in step <b>9140,</b> a discount at a local business in step <b>9142,</b> a local weather forecast in step <b>9144,</b> transit schedules in step <b>9146,</b> entertainment schedules in step <b>9148,</b> or expense management in step <b>9150.</b> If desired, any journal entry may be linked to an element from another travel feature.

0307Step <b>8932</b> (<figref idref="f0098">FIG. <b>89</b></figref><b>),</b> assisting a user in identifying local wildlife, is described in more detail in <figref idref="f0101">FIG. <b>92</b></figref><b>.</b> All steps are optional and may be performed in any suitable order. The MPN may be configured, for example, as shown in <figref idref="f0099">FIG. <b>90</b></figref><b>.</b> In step <b>9210,</b> the user may be allowed to capture an image of wildlife, for example using digital camera <b>9020,</b> and it may be stored in image memory <b>9012.</b> In step <b>9220,</b> a library of images of wildlife may be stored, for example in database memory <b>9014.</b> The library of images may be downloaded into database memory <b>9014</b> in step <b>9222</b> for example using communications device <b>9030.</b> The images downloaded may be specific to a geographical region in step <b>9224.</b> In step <b>9230,</b> the captured image may be compared with the images from the library, using, for example, processor <b>9010.</b> In step <b>9232,</b> the system may allow the user to assist the search, for example by using a user input INC to narrow a list of potential matches. In step <b>9234,</b> one or more potential matches may be presented to the user, for example using display <b>9060.</b> In step <b>9240,</b> additional information may be provided for the wildlife in the library. For example, there may be text descriptions, descriptions of habitat and habits, sound samples characteristic of the wildlife, etc. In step <b>9250,</b> the user may be allowed to annotate the captured image. For example, the user may be allowed to add text in substep <b>9252,</b> voice or other captured audio in substep <b>9254,</b> a drawing in substep <b>9256,</b> or any other suitable type of user annotation. In step <b>9260,</b> the captured image may be automatically annotated. That may include an annotation with a link to any match or matches from the wildlife library in substep <b>9262,</b> the time the image was captured determined for example using clock <b>9050</b> in substep <b>9264,</b> the location at which the image was captured in substep <b>9266</b> determined for example using GPS monitor <b>9052,</b> or any other suitable automatic annotation.

0308<figref idref="f0102">FIG. <b>93</b></figref> shows more detail of step <b>3225</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> supporting outdoor enthusiast features with an MPN. All steps are optional and may be performed in any suitable order. In step <b>9310,</b> the MPN may provide directional information. For example, one of the INCs may include a compass. In step <b>9320,</b> the MPN may provide position information, if for example one of the INCs contains a position monitor. In step <b>9330,</b> the MPN may provide elevation information, using an INC that may include an elevation monitor. In step <b>9340,</b> the MPN may provide route guidance. Guidance may be based on, for example, topographical information, trail maps, visual landmarks, and other items useful to a hiker, skier, snowshoer, or other outdoor enthusiast. The MPN may also provide weather related information, such as environmental temperature readings in step <b>9350,</b> humidity readings in step <b>9360,</b> or barometric readings in step <b>9370.</b> Other suitable outdoor features may also be included if desired.

0309<figref idref="f0103">FIG. <b>94</b></figref> shows more detail of step <b>3240</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> providing an identification function with an MPN. All steps are optional and may be performed in any suitable order. In step <b>9410,</b> the MPN may confirm an identity using a smart card, with an INC that may include a smart card reader. In step <b>9415,</b> the MPN may confirm an identity using a personal code or password, for example if one of the INCs allows numeric or text entry. In step <b>9420,</b> an identity may be confirmed using biometrics. The biometric may be any suitable technique adapted to a portable INC in the MPN, and may include fingerprint analysis in substep <b>9421,</b> voice identification in substep <b>9422,</b> hand or finger scanning in substep <b>9423,</b> analysis of typing characteristics in substep <b>9424,</b> signature analysis in substep <b>9425,</b> iris scanning in substep <b>9426,</b> retina scanning in substep <b>9427,</b> or facial scanning in substep <b>9428.</b> If desired, other physical characteristics may be used for identification, such as athletic performance data or metabolic data.

0310In step <b>9430,</b> exchange of money may be provided based on the confirmed identity. In step <b>9440,</b> the identity may be proven to another person. In step <b>9445,</b> the identity may be proven to another system, such as another MPN. In step <b>9450,</b> a product discount may be provided based on the confirmed identity. In step <b>9455,</b> product purchasing may be provided based on the confirmed identity. If desired, the system may store purchasing information, such as a credit card number, a bank account number, a bank balance, or any other suitable information. If desired, the personal identification may also be used to prevent unauthorized use of the MPN or any of its INCs. The personal identification may also be used to provide secure access to restricted areas, features, and the like.

0311<figref idref="f0104">FIG. <b>95</b></figref> shows more detail of step 3245 of <figref idref="f0044">FIG. 32</figref>, providing a personal security function with an MPN. All steps are optional and may be performed in any suitable order. In step <b>9505,</b> the MPN may be capable of providing an audible alert, such as a whistle or other alarm. In step <b>9510,</b> the MPN may be configured to provide an alert to public safety personnel. For example, an INC may be provided that includes a communication INC configured to transmit a message to an emergency dispatch facility, a police department, a fire department, or an emergency medical facility. The audible alert or emergency message may be triggered by a specific user input, or by any other suitable input or lack of input that may arise in the event of a personal or public emergency. In step <b>9520,</b> the MPN may store emergency contact information for the user, and may be configured to display or otherwise provide that information with suitable authorization. In step <b>9530,</b> the MPN may be configured to store emergency medical information, such as preexisting conditions, allergies, current prescriptions, etc., and may be configured to display or otherwise provide that information with suitable authorization.

0312<figref idref="f0105">FIG. <b>96</b></figref> shows more detail of step <b>3250</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> providing a military function in an MPN. All steps are optional and may be performed in any suitable order. For example, individual military members involved in ground support may each be equipped with an MPN having suitable INCs and functions. The MPN may provide a communications function in step <b>9610,</b> such as instant message, and voice, data, text, or video communications. The MPN may provide location functions in step <b>9620,</b> such as providing the current location using a GPS monitor. The MPN may include guidance functions in step <b>9630.</b> That may include guidance to specific position in substep <b>9632,</b> and directional information in substep <b>9634.</b> The MPN may provide weather functions in step <b>9640.</b> This may include barometric readings in substep <b>9642,</b> environmental temperature readings in substep <b>9644,</b> humidity readings in substep <b>9646,</b> or any other suitable weather function.

0313As described in step <b>3270</b> of <figref idref="f0044">FIG. <b>32</b></figref><b>,</b> an MPN may support multiple functions. Some combinations have been described above. For example, providing both athletic and guidance functions was described in conjunction with <figref idref="f0054">FIG. <b>43A</b></figref><b>.</b> Providing both music and other audio cues was described in conjunction with step <b>2960</b> of <figref idref="f0040">FIG. <b>29</b></figref><b>.</b>

0314Another example of an MPN <b>9700</b> that may be used for multiple purposes is shown in <figref idref="f0106">FIG. <b>97</b></figref><b>.</b> MPN <b>9700</b> may include INC <b>9710,</b> configured to be worn on the wrist. INC <b>9710</b> may include a display INC, user controls, and a microphone. MPN <b>9700</b> may include INC <b>9720,</b> configured to be worn on a waistband. INC <b>9720</b> may include control unit functions, clock functions, storage of audio and video media, and a GPS monitor. MPN <b>9700</b> may include INC <b>9730,</b> which may be a video/still camera configured to be worn on a waistband. MPN <b>9700</b> may include INC <b>9740,</b> which may be an audio output INC. MPN <b>9700</b> may include INC <b>9750,</b> which may be a heart rate sensor configured to be worn on the chest. These INCs are merely illustrative. Any suitable INCs and method of carrying may be used.

0315<figref idref="f0107">FIG. <b>98</b></figref> shows flow chart <b>9800</b> of an illustrative process for allowing multiple uses of MPN <b>9700</b> (<figref idref="f0106">FIG. <b>97</b></figref><b>).</b> All steps are optional and may be performed in any suitable order. In step <b>9805,</b> the user may be allowed to listen to music. Music may be stored digitally in INC <b>9720</b> and sent to INC <b>9740</b> to be heard. In step <b>9810,</b> the user may be allowed to collect media data. For example, using the microphone in INC <b>9710</b> and using INC <b>9730,</b> the user may collect audio data in substep <b>9812,</b> video data in substep <b>9814,</b> and still images in substep <b>9816.</b> In step <b>9820,</b> the MPN may collect personal data. That may include, for example, heart rate data <b>9822</b> collected from INC <b>9750</b> or other suitable athletic data <b>9826,</b> and speed, location <b>9824,</b> and elevation data collected from the GPS monitor in INC <b>9720.</b> In step <b>9830,</b> the media data may be stored, for example in memory in INC <b>9720.</b> In step <b>9832,</b> the personal data may be stored, for example in memory in INC <b>9720.</b> In step <b>9834,</b> a relationship may be stored between the media data and the personal data. For example, the personal data may be stored at a regular interval with a time stamp, and the collected media data may use the same time stamp. In step <b>9840,</b> the MPN may interpret collected media. That may include speech recognition in substep <b>9842.</b> The interpreted media may be used to control the functions of the MPN in step <b>9845,</b> for example controlling the collection of personal data. Alternatively, the interpreted media may be stored as text or in another suitable format. In step <b>9850,</b> data may be uploaded, for example to a base station or personal computer. That may include uploading the personal data in substep <b>9852,</b> the media data in substep <b>9854,</b> and the relationship between them in step <b>9856.</b> In step <b>9860,</b> the uploaded data may be stored. This may include storing the personal data in substep <b>9862,</b> the media data in substep <b>9864,</b> and the relationship data in substep <b>9866.</b> In step <b>9870,</b> the personal data may be displayed. In step <b>9872,</b> the media data may be displayed or output based on its relationship to the personal data. See the description of <figref idref="f0058">FIGs. <b>46</b></figref> and <figref idref="f0059"><b>48</b></figref> for examples of the display of personal data and the related media data.

0316<figref idref="f0108">FIG. <b>99</b></figref> shows illustrative data structure <b>9900</b> that may be used to store personal data and their relationships to media data. In this example, personal data samples are stored every second. First sample <b>9920</b> has time stamp <b>9910</b> and has no linked media. Second sample <b>9940</b> has time stamp <b>9930,</b> and has related media link <b>9950.</b> In this case, the media link is the name of a file containing a still image captured by the user. The MPN has automatically named the file based on the type of content and date and time of capture. Third sample <b>9970</b> with stamp <b>9960</b> in this example has no linked media.

0317The ability to easily turn off all INCs in an MPN may be useful to conserve power. It may also be useful to terminate radio frequency transmission in an environment in which they may cause unwanted interference, such as on a commercial airliner. One of the commands received by the user input INC may be a turn on command, or a turn off command. These may be global commands applying to all INCs in the MPN. A process for handling a global turn on command and a global turn off command is shown in <figref idref="f0110">FIG. <b>101A</b></figref> and <figref idref="f0111">FIG. <b>101B</b></figref>. All steps are optional and may be performed in any suitable order. Flow chart <b>10100</b> of <figref idref="f0110">FIG. <b>101A</b></figref> shows an illustrative process that may be performed by a user input INC, or by an INC such as a control unit that receives commands from a user input INC. In step <b>10102,</b> the INC may be in its normal "on" state, in which it processes commands and data normally. The INC may check for user input in step <b>10104.</b> If no user input is received, the INC may remain in its normal "on" state and continue with normal functions. If user input is received, the INC may check to see if it is a turn off command in step <b>10106.</b> Any appropriate type of user input may be used, such as a voice input, a key press, etc. If the user input is not a turn off command, the INC may process the user input normally in step <b>10108</b> and continue with normal functions. If the user input is a turn off command, the INC may check to see if the command is validated in step <b>10110.</b> Validation may consist of a second input, holding the key down for an extended period, the entry of a personal code, or any other suitable user validation. If desired, the INC may not require validation. If the turn off command is not validated within a defined period of time, the INC may return to its normal "on" state. If the turn off command is validated, the INC may proceed with the turn off sequence.

0318In step <b>10112,</b> the INC may send a turn off command to all of the INCs in the MPN. This may be a single message that is broadcast to all INCs with the same network identifier in substep <b>10114.</b> Alternatively, individual messages may be sent addressed to each INC in substep <b>10116.</b> In step <b>10118,</b> the INC may wait for confirmation from each other INC. If confirmation is not received, the INC may resend the turn off command, display an error message, or perform another suitable action. If desired, the wait for confirmation step may be optional. Once all confirmations have been received, the INC may enter a low power mode, in step <b>10120.</b> For example, if a processor with a sleep mode is used in the INC, it may enter the sleep mode, and it may configure an interrupt to be generated when a user input is received.

0319While in the low power turned off state, the INC may check for user input, in step <b>10122.</b> For example, an interrupt may be generated when a user input is received. If no user input is received, the INC may remain in the turned off state. If user input is received, the INC may check to see if it is a turn on command, in step <b>10124.</b> If not, the user input may be ignored and the INC may remain in the turned off state. If the turn on command is confirmed, the INC may resume its high power mode, in step <b>10126.</b> Turn on messages may be sent to all components in step <b>10128,</b> either as a single broadcast message or as individually addressed messages. The INC may resynchronize with the other components in step <b>10130.</b> This may include waiting for acknowledgement from the turn on message, resending the turn on message if required, or synchronizing functions that may have been in progress prior to the turn off command. In step <b>10132,</b> normal functioning may resume.

0320Flow chart <b>10150</b> of <figref idref="f0111">FIG. <b>101B</b></figref> shows an illustrative process that may be performed by an INC that does not receive user input. The INC may start in its normal "on" state, in step <b>10152.</b> It may be performing its normal functions, such as data collection, output, control, storage, or other functions or combination of functions. In step <b>10154,</b> the INC may check for a message, such as a wireless message from another INC in the MPN. This may include checking to see if the message has the correct network identifier, component identifier, or other address. If no message is received, the INC may continue its normal functions. When a message is received, the INC may check to see if it is a turn off message, in step <b>10156.</b> If not, the message may be handled normally, in step <b>10158,</b> and the INC may remain in its normal "on" state. When a turn off message is received, the INC may acknowledge the message in step <b>10160.</b> The acknowledgement may be optional. In step <b>10162,</b> the INC may stop its normal functions. This may include stopping any data collection, output, or control functions. The INC may stop sending any information using its wireless transmitter. Preferably, the INC will retain any stored information in memory, including information about any processes that may have been underway, and any other information required to later resume normal functions. In step <b>10164,</b> the INC may enter a low power mode. For example, if a processor with a sleep mode is used in the INC, it may enter the sleep mode, and it may configure an interrupt to be generated when a wireless message is received.

0321While in low power mode, the INC may check for incoming messages, in step <b>10166.</b> If no message is received, it may remain in low power mode. When a message is received, the INC may check to see if it is a turn on message, in step <b>10168.</b> If the message is not a turn on message, the INC may ignore it and remain in the low power off state. When the turn on message is received, the INC may resume its high power mode in step <b>10170.</b> An optional acknowledgement message may be sent in step <b>10172.</b> Optionally, the INC may resynchronize with other INCs in the MPN, in step <b>10174.</b> This may include synchronizing any functions that were in progress when the power off message was received. In step <b>10176,</b> the INC may resume normal functions, and return to its normal "on" state.

0322Although various embodiments have been described herein in terms of an MPN, many of them are possible without all of the features and aspects of an MPN. For example, components may be designed specifically for a single purpose, and may not support dynamic configuration of a wireless network.

0323Although our present invention has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. This includes uses, functions, components, and combinations thereof that may not be fully described. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiments contained herein.