Wireless resource management system, method thereof, management apparatus used for the same, base station, and terminal

【0001】

[Technical field to which the invention belongs]

The present invention relates to a wireless resource management system and its method, and management devices, base stations, terminals and programs used therefor, and particularly in a public mobile communication by a cellular system or a wireless network such as a wireless LAN, a wireless network of a plurality of wireless operators. It is related to the management method of wireless resources that spans.

【0002】

[Conventional technology]

In a conventional wireless network, each wireless operator installs a wireless base station independently, and wireless resources such as frequency channels used by wireless base stations and wireless terminals, transmission power and transfer rate of wireless links are provided for each operator. It was managed independently. In the case of public mobile communication by the cellular method, since the exclusive right to use the frequency band is usually given by the license for each operator, wireless interference between the operators does not occur and the wireless resource is independent for each operator. Management is fine. When the wireless resource is monopolized by such a license, the wireless resource management performed by the wireless operator becomes easier because it is not necessary to consider the interference from other wireless operators.

【0003】

However, in this case, the traffic demand in the network of a specific wireless operator is much lower than expected, and even if there is a surplus of wireless resources, it cannot be accommodated by other wireless operators, so that the frequency utilization efficiency There is a problem that is reduced.

【0004】

On the other hand, in the case of a wireless LAN system that uses a frequency band that does not require a license, such as the 2.4 GHz band or 5 GHz band, wireless resources can be shared with networks of multiple wireless operators, private networks, and systems other than wireless LAN that use the same frequency band. share it. In the case of wireless LAN, since the maximum transmission power is restricted to a relatively small level, each wireless system has been isolated in many cases in the past, and physical interference between wireless systems occurs between operators. There were few cases of doing so. In addition, when operating a wireless LAN within a company, it is relatively easy to unify the operation policy, so even if the wireless LAN areas overlap, the wireless resource management method is autonomous for the terminal or wireless base station. Only control was enough.

【0005】

For example, as a method of autonomously selecting a wireless base station of a terminal in a wireless LAN, the terminal selects and connects the wireless base station with the best conditions according to the wireless link quality measured by the terminal and the load of the wireless LAN. There is a method (see Patent Documents 1 and 2).

【0006】

Further, as an autonomous wireless resource management method of a wireless base station in a wireless LAN, there is a method of dynamically switching the operating frequency channel of the wireless LAN according to noise or interference (see Patent Document 3). Furthermore, as a method in which terminals and wireless base stations cooperate to manage wireless resources, the wireless base stations store link quality statistical information for each wireless terminal and give priority to other wireless base stations that are candidates for movement. There is a method of presenting in order of degree (see Patent Document 4).

【0007】

[Patent Document 1]

Japanese Unexamined Patent Publication No. 2001-298467 (Pages 6 and 7, Fig. 6) [Patent Document 2]

Japanese Unexamined Patent Publication No. 2001-274816 (Pages 7 and 8, Fig. 4) [Patent Document 3]

Japanese Unexamined Patent Publication No. 2002-009664 (Page 2, Figures 1 and 2) [Patent Document 4]

Japanese Unexamined Patent Publication No. 2001-103531 (pages 2 to 5, FIGS. 1 to 4) [0008]

[Problems to be Solved by the Invention]

While autonomous wireless resource management of these terminals or wireless base stations is relatively easy to realize, there are restrictions on the information that can be notified to each other between wireless networks of multiple operators with different operational policies, and there are also restrictions. If almost all terminals and wireless base stations do not support autonomous wireless resource management, the effect will be small, so there is a problem that they do not always function as intended.

【0009】

In particular, in recent years, the number of businesses that provide Internet connection services via wireless LAN has increased rapidly in public spaces such as airports, conference halls, and restaurants. A situation like wrapping is possible. In this case, as a result of a plurality of wireless operators sharing wireless resources with each other, wireless interference occurs between the systems. In the conventional autonomous wireless resource management system, the frequency channel of the wireless base station, the transmission power, the position of the wireless base station, etc. are used to avoid interference based on the limited information available to each wireless operator. However, due to the limited information, the optimal wireless resource allocation is not always performed in the entire system that combines multiple operators. In addition, when the load is concentrated on a specific business operator, there is no mechanism to distribute it among the business operators. Moreover, since there was no mechanism for managing the wireless resources of multiple operators in an integrated manner, no service corresponding to this was considered.

【0010】

Therefore, the present invention manages the wireless network quality of a plurality of wireless operators in an integrated manner, and changes the frequency channel, transmission power, accommodating terminal, etc. of the wireless base station as necessary to share wireless resources. It is an object of the present invention to provide a wireless resource management system and a method thereof capable of optimally operating the above, and a server, a base station, a terminal, and a program used for the wireless resource management system.

【0011】

[Means for solving problems]

The radio resource management method according to the present invention changes and controls the frequency used by the radio base station based on the radio link quality information notified from at least one of a plurality of radio base stations and radio terminals belonging to different operators. It is characterized by including a control step.

【0012】

The other radio resource management method according to the present invention controls the transmission power of the radio base station based on the radio link quality information notified from at least one of a plurality of radio base stations and radio terminals belonging to different operators. It is characterized by including a control step.

【0013】

Yet another radio resource management method according to the present invention is a radio housed in the radio base station based on radio link quality information notified from at least one of a plurality of radio base stations and radio terminals belonging to different operators. It is characterized by including a control step that performs distributed control of a load that is a terminal.

【0014】

Another radio resource management method according to the present invention detects an interference state between operators based on wireless link quality information notified from at least one of a plurality of wireless base stations and wireless terminals belonging to different operators. It is characterized by including a control step for performing failure notification control according to a detection result.

【0015】

The radio resource management device according to the present invention controls frequency changes used by the radio base station based on radio link quality information notified from at least one of a plurality of radio base stations and radio terminals belonging to different operators. It is characterized by including a control means for wireless communication.

【0016】

The other wireless resource management device according to the present invention controls the transmission power of the wireless base station based on the wireless link quality information notified from at least one of a plurality of wireless base stations and wireless terminals belonging to different operators. It is characterized by including a control means.

【0017】

Yet another radio resource management device according to the present invention is a radio housed in the radio base station based on radio link quality information notified from at least one of a plurality of radio base stations and radio terminals belonging to different operators. It is characterized by including a control means for distributed control of a load which is a terminal.

【0018】

Another wireless resource management device according to the present invention detects an interference state between operators based on wireless link quality information notified from at least one of a plurality of wireless base stations and wireless terminals belonging to different operators. It is characterized by including a control means for performing failure notification control according to a detection result.

【0019】

The radio base station according to the present invention is a radio base station in a radio network system including a radio resource management device that manages radio resources and radio base stations belonging to a plurality of different radio operators, and the quality of the radio link. In response to the means for notifying the wireless resource management device of the wireless link quality information which is the measurement result and the frequency change control notification based on the measurement result from the wireless resource management device, the frequency used. It is characterized by including means for controlling change.

【0020】

The other radio base station according to the present invention is a radio base station in a radio network system including a radio resource management device that manages radio resources and a radio base station belonging to a plurality of different radio operators, and is a radio link. The transmission power is changed in response to the means for measuring the quality of the wireless resource and notifying the wireless resource management device of the wireless link quality information which is the measurement result and the transmission power control based on the measurement result from the wireless resource management device. It is characterized by including means for controlling.

【0021】

The wireless terminal according to the present invention is a wireless terminal in a wireless network system including a wireless resource management device that manages wireless resources and wireless base stations belonging to a plurality of different wireless operators, and measures the quality of wireless links. Then, in response to the means for notifying the radio resource management device of the radio link quality information which is the measurement result and the frequency change control notification based on the measurement result from the radio resource management device, the change control of the used frequency is performed. It is characterized by including means for forming a wireless device.

【0022】

The other wireless terminal according to the present invention is a wireless terminal in a wireless network system including a wireless resource management device that manages wireless resources and wireless base stations belonging to a plurality of different wireless operators, and the quality of the wireless link. And the means for notifying the wireless resource management device of the wireless link quality information which is the measurement result, and the transmission power change control in response to the transmission power control based on the measurement result from the wireless resource management device. It is characterized by including means of making.

【0023】

Yet another wireless terminal according to the present invention is a wireless terminal in a wireless network system including a wireless resource management device that manages wireless resources and wireless base stations belonging to a plurality of different wireless operators, and is a wireless terminal of a wireless link. A means for measuring the quality and notifying the wireless resource management device of the wireless link quality information which is the measurement result, and a connection base in response to the distributed control of the connected wireless terminal based on the measurement result from the wireless resource management device. It is characterized by including a base station change control means for changing and controlling a station.

【0024】

The program according to the present invention is a program for causing a computer to execute a control operation of a wireless resource management device in a wireless network system, and is a wireless link notified from at least one of a wireless base station and a wireless terminal belonging to different operators. It is characterized by including a frequency control step for controlling the change of the frequency used by the radio base station based on the quality information.

【0025】

The other program according to the present invention is a program for causing a computer to execute a control operation of a wireless resource management device in a wireless network system, and is notified from at least one of a wireless base station and a wireless terminal belonging to different operators. It is characterized by including a transmission power control step for controlling the transmission power of the radio base station based on the radio link quality information.

【0026】

Yet another program according to the present invention is a program for causing a computer to execute a control operation of a wireless resource management device in a wireless network system, and is notified by at least one of a wireless base station and a wireless terminal belonging to different operators. It is characterized by including a load distribution control step for performing load distribution control, which is a wireless terminal connected to the wireless base station, based on the wireless link quality information.

【0027】

Another program according to the present invention is a program for causing a computer to execute a control operation of a wireless resource management device in a wireless network system, and is notified from at least one of a wireless base station and a wireless terminal belonging to different operators. When wireless interference exceeding a predetermined value is detected from another wireless operator in the network of one wireless operator based on the wireless link quality information, the network management server of the wireless operator that is the source of interference is detected. On the other hand, it is characterized by including a step of notifying the occurrence of a failure and the amount of interference, the amount of transmission power that the radio base station should attenuate, and the frequency that the radio base station should change.

【0028】

In yet another program according to the present invention, a computer executes a control operation of a radio base station in a radio network system including a radio resource management device that manages radio resources and radio base stations belonging to a plurality of different radio operators. A program for measuring the quality of the wireless link and notifying the wireless resource management device of the wireless link quality information which is the measurement result, and a frequency based on the measurement result from the wireless resource management device. It is characterized by including a step of controlling the change of the frequency used in response to the change control notification of.

【0029】

In another program according to the present invention, a computer executes a control operation of a radio base station in a radio network system including a radio resource management device that manages radio resources and radio base stations belonging to a plurality of different radio operators. This is a program for measuring the quality of the wireless link and notifying the wireless resource management device of the wireless link quality information which is the measurement result, and the transmission power control based on the measurement result from the wireless resource management device. It is characterized by including a step of controlling the change of the transmission power in response to.

【0030】

Another program according to the present invention is for causing a computer to perform a control operation of a wireless terminal in a wireless network system including a wireless resource management device that manages wireless resources and wireless base stations belonging to a plurality of different wireless operators. The step of measuring the quality of the wireless link and notifying the wireless resource management device of the wireless link quality information which is the measurement result, and changing the frequency based on the measurement result from the wireless resource management device. It is characterized by including a step of controlling the change of the frequency used in response to the control notification.

【0031】

Another program according to the present invention is for causing a computer to perform a control operation of a wireless terminal in a wireless network system including a wireless resource management device that manages wireless resources and wireless base stations belonging to a plurality of different wireless operators. In the program of, the step of measuring the quality of the wireless link and notifying the wireless resource management device of the wireless link quality information which is the measurement result, and the transmission power control based on the measurement result from the wireless resource management device. It is characterized by including a step of responding and controlling a change in transmission power.

【0032】

Another program according to the present invention is for causing a computer to perform a control operation of a wireless terminal in a wireless network system including a wireless resource management device that manages wireless resources and wireless base stations belonging to a plurality of different wireless operators. In the program of, the step of measuring the quality of the wireless link and notifying the wireless resource management device of the wireless link quality information which is the measurement result, and the connection wireless terminal based on the measurement result from the wireless resource management device. It is characterized by including a step of changing and controlling a connected base station in response to distributed control.

【0033】

The wireless resource management system according to the present invention is a means for collecting the link quality, link utilization rate, and link communication speed of a wireless link from at least one of a wireless base station and a wireless terminal belonging to a plurality of different operators, and collecting these. It is characterized by including a price determining means for determining a price for providing a communication service via each network of the plurality of business operators to an external network according to the result and notifying the external network.

【0034】

Another wireless resource management system according to the present invention is a wireless resource management system including a wireless resource management server owned by the wireless resource administrator and wireless equipment of a wireless communication operator who has concluded a management contract with the wireless resource administrator. The wireless resource management server monitors the communication status of the wireless communication operator and performs failure processing on the wireless resource in response to the occurrence of a failure, and a management service charge for the wireless resource. It is characterized by including a fee billing means for making a claim to the wireless communication operator.

【0035】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the configuration of the radio resource management system according to the first embodiment of the present invention. The service area 100 of the wireless operator A, the service area 101 of the wireless operator B, and the service area 102 of the wireless operator C partially overlap, and the wireless resource management server 40 is provided by these three operators. Manage shared wireless resources in a unified manner. Here, it is assumed that each operator has a roaming contract with each other so that each wireless terminal can freely roam between these service areas 100 to 102 and continue communication, and each other's services are provided by this roaming. Areas are interpolated. Further, each wireless operator may have a network management server for the operator in the network (Fig. 1 shows the network management server 60 of the wireless operator A as an example).

【0036】

In the service area 100 of the wireless operator A, the wireless terminals 10 and 11 are connected to the wireless base station 20, and data communication is performed via the wireless links 201 and 202. The wireless base stations 20 and 21 are connected to the wireless network 30 of the wireless operator A via the wired links 300 and 301, respectively, and further connected to the wireless resource management server 40 and the external network 50 via the wired links 310 and 320, respectively. Will be done.

【0037】

In the service area 101 of the wireless operator B, the wireless terminals 12, 13 and 14 are connected to the wireless base station 22 and perform data communication via the wireless links 203, 204 and 205. The wireless terminal 12 can be connected to either the wireless base station 22 of the wireless operator B or the wireless base station 21 of the wireless operator A, but here, it is connected to the wireless base station 22 of the wireless operator B. The wireless base station 22 is connected to the wired network 31 of the wireless operator B via the wired link 302, and is further connected to the wireless resource management server 40 and the external network 50 via the wired links 311, 312, respectively.

【0038】

In the service area 102 of the wireless operator C, the wireless terminal 15 connects to the wireless base station 23 and the wireless terminals 16 and 17 connect to the wireless base station 24, and data communication is performed via the wireless links 206, 207, and 208. The radio terminals 15 and 16 can be connected to either the radio base station 22 of the radio operator B or the radio base stations 23 and 24 of the radio operator C, but here, the radio base station 23 of the radio operator C, respectively. Connected to 24. The wireless base stations 23 and 24 are connected to the wired network 32 of the wireless operator C via the wired links 303 and 304, and further connected to the wireless resource management server 40 and the external network 50 via the wired links 312 and 322, respectively. To.

【0039】

FIG. 2 is a schematic functional block diagram of a wireless base station, in which downlink user data (packet data) is transmitted by a transmission unit 69 and transmitted to a wireless terminal via a transmission / reception duplexer 61 and an antenna. The received radio wave from the antenna is supplied to the receiving unit 62 via the transmission / reception transmitter 61, and various control information including the user data in the upstream direction and the pilot signal and the like are derived. Based on these user data and control information, the link quality measurement unit 64 and the link utilization rate measurement unit 65 measure the quality and utilization rate of the wireless link, respectively. Further, the interference amount measuring unit 66 determines a neighboring radio base station to be notified to the radio resource management server, and measures information about the determined neighboring radio base station. As an example of this determination method, there is a method of determining based on the reception level of radio waves from a nearby radio base station described later.

【0040】

The wireless terminal measurement result detection unit 67 detects various measurement information transmitted from the wireless terminal, and the data synthesis unit 68 detects this detection result, the link quality measurement unit 64, the link utilization rate measurement unit 65, and the amount of interference. The measurement result by the measurement unit 66 is synthesized and notified to the wireless resource management server via the communication unit 73 as the wireless link measurement information 600. Further, various messages from the wireless resource management server obtained via the communication unit 73 are analyzed by the message analysis unit 74, and the analysis result is supplied to the control unit 71, which is the CPU. According to this analysis result, the control unit 71 controls the reception control unit 63 and the transmission control unit 70 to perform processing such as frequency change control and transmission power control, which will be described later. The memory 72 is also a working memory of the CPU and a memory for storing an operation control program.

【0041】

FIG. 3 shows an operation flowchart of the radio base station according to the first embodiment of the present invention. First, the radio base station performs initialization processing after booting, acquires information such as frequency channels, transmission power, own station address, and radio resource management server address, and performs various configurations (step 401).

【0042】

Next, the radio base station activates timer T1 (step 402) and waits for an event (step 403). This timer T1 specifies the interval at which the wireless base station notifies the wireless resource management server of the measurement result of the wireless link, and is a variable amount that can be set for each wireless base station. Every time T1 times out, the radio base station notifies its own radio link quality information (step 404), radio link utilization rate information (step 405), and the radio resource management server from a nearby radio base station. After acquiring the interference information (step 406), the measurement result is sent to the wireless resource management server (step 407), the timer T1 is restarted, and then the system returns to the event waiting state.

【0043】

Next, when the radio base station receives the radio resource control message from the radio resource management server (step 409) and the control content is the frequency channel change request (step 410), the frequency channel change process (step 411) is performed. If it is a transmission power change request (step 412), the transmission power is changed to the specified value (step 413). Normally, the data transfer process is independent of these control messages, and packet transfer processing is performed between the wired link and the wireless link, and between the wireless link and the wired link (steps 414 to 416). Further, when the wireless base station is shut down, it is terminated after the termination process is performed (steps 417 to 418).

【0044】

FIG. 4 shows the contents of the wireless link measurement information 600 transmitted from the wireless base station to the wireless resource management server in the first embodiment of the present invention. The wireless link measurement information 600 includes the wireless link quality information 610 of the own station, the wireless link utilization rate information 620 of the own station, the number of wireless base stations in the vicinity 630, and the wireless base stations 1, 2, 3, .... It consists of wireless interference information 640, 650, 660, ... with .. These wireless link quality information, wireless link utilization rate information, and wireless interference information can be collectively referred to as wireless link quality information. That is, when the wireless link utilization rate becomes high, congestion occurs and the communication quality deteriorates. Therefore, this wireless link utilization rate can be said to be quality information, and the interference information is naturally quality information.

【0045】

The radio link quality information 610 of the own station includes the radio operator identifier 611, the radio base station identifier 612, the frequency channel 613, the installation location latitude information 614, the installation location longitude information 615, the received packet error rate 616, and the transmission power level 617. included. For example, in the case of a wireless LAN, a service set ID (SSID) is used for the wireless operator identifier 611, and a MAC (Media Access Control) address of the wireless base station is used for the wireless base station identifier. The frequency channel 613 indicates the channel number assigned to each wireless system or the frequency itself in kHz.

【0046】

The latitude / longitude information of the installation location is used only when the radio base station has such information. As a means for acquiring such latitude / longitude information, a Global Positioning System (GPS), a PHS method, or the like can be considered. It is also possible for the base station installer to make manual measurements. The received packet error rate 616 indicates the percentage of packets received from the subordinate wireless terminal during the measurement interval that resulted in a CRC (Cyclic Redundancy Check) error, and the transmission power level is being transmitted by the wireless base station toward the wireless terminal. The power level is shown in dBm.

【0047】

The wireless link utilization rate information 620 of the own station includes the physical speed of the wireless link 621, the number of accommodated wireless terminals 622, the average transmission rate 623, the average reception rate 624, the peak transmission rate 625, and the peak reception rate 626. The number of accommodated wireless terminals 621 indicates the number of wireless terminals connected under the control of the wireless base station. The average transmission rate 623 and the average reception rate 624 are average bit rates obtained by dividing the number of bits transmitted / received via the wireless link during the measurement interval by the measurement interval, respectively. On the other hand, the peak transmission rate 625 and the peak reception rate 626 represent the maximum number of bits transmitted / received during any one second between measurement intervals.

【0048】

The number of neighboring radio base stations 630 indicates the number included in the radio link measurement information 600 among other radio base stations that can be detected by the radio base station. That is, in the radio base station, the reception level of radio waves from other radio base stations is equal to or higher than a predetermined threshold value as "another radio base station that can be detected by the radio base station" and "radio link measurement". The "number to be included in the information 600" is the number of radio base stations having a reception level equal to or higher than the second threshold value in which the reception level threshold of the radio base station is set higher. By transmitting only information about other wireless base stations that may interfere with the own station to the wireless link source management server, the traffic volume is reduced and network congestion is prevented.

【0049】

The radio base station does not necessarily have to notify the radio resource management server of the information of all the other radio base stations detected. The radio interference information 640 with the neighboring radio base station 1 includes the radio operator identifier 641, the radio base station identifier 642, the frequency channel 643, the received power level 644, and the received signal to noise ratio 645. These meanings are as explained in the wireless link quality information 610 of the own station. Actually, the amount of interference from other radio base stations is obtained from the total received power level from other stations in the same frequency channel as the own station.

【0050】

Next, the wireless terminal will be described. FIG. 5 is a schematic functional block diagram of the wireless terminal, in which the downward reception signal from the antenna is supplied to the reception unit 76 via the transmission / reception duplexer 75, and the user data and various control signals are derived. These user data and various control signals are input to the link quality measurement unit 78, the link utilization rate measurement unit 79, the interference amount measurement unit 80, and the message analysis unit 81, respectively. The link quality measurement unit 78 measures the quality of the wireless link, the link utilization rate measurement unit 79 measures the utilization rate of the wireless link, and the interference amount measurement unit 80 measures the interference amount. In addition, the message analysis unit 81 analyzes various messages from the wireless resource management server. The message may be transmitted via a radio base station.

【0051】

According to the analysis result of this message, the control unit 83, which is a CPU, performs various controls of the reception control unit 77 and the transmission control unit 86, that is, frequency change control, transmission power control, base station change control, and the like. The various measurement information described above is combined with the user data in the upward direction by the transmission data synthesis unit 82 and supplied to the transmission unit 85. Transmission processing is performed by the transmission unit 85, and upstream transmission is performed via the transmission / reception duplexer 75. The memory 84 is also a working memory of the CPU 83 and a memory for storing the control program of the wireless terminal.

【0052】

FIG. 6 is a flowchart showing the operation of the wireless terminal according to the first embodiment of the present invention. The wireless terminal performs initialization processing after booting, sets the frequency channel and transmission power, connects to a nearby wireless base station, obtains information such as the address of its own station and the address of the wireless resource management server, and various configurations. (Step 421). Next, the wireless terminal activates timer T2 (step 422) and waits for an event (step 423). The value of this timer T2 determines the interval at which the wireless terminal notifies the wireless resource management server of the measurement result of the wireless link.

【0053】

Every time T2 times out, the wireless terminal provides wireless link quality information with the wireless base station in communication (step 424), wireless link utilization information with the wireless base station in communication (step 425), and nearby wireless bases. After acquiring the link quality information (interference information) with the station (step 426), send the measurement result to the wireless resource management server (step 427), restart the timer T2 (step 428), and then wait for the event. Return.

【0054】

Next, when the wireless terminal receives a wireless resource control message from the wireless resource management server (step 429), if the control content is a transmission power change request (step 430), the transmission power is changed to the specified value (step 429). In step 431), if the control content is a radio base station change request (step 432), handover is performed to the designated radio base station (step 435). At this time, if roaming is performed across wireless operators (step 433), the wireless operator change process such as authentication is performed as necessary (step 434). When normal data is input to the wireless terminal, packet transmission / reception processing is performed (steps 436 to 438), and when shutdown processing is started, termination processing is performed and then termination (steps 439 to 440).

【0055】

FIG. 7 is a diagram showing the contents of the wireless link measurement information 700 transmitted from the wireless terminal to the wireless resource management server in the first embodiment of the present invention. The wireless link measurement information 700 includes wireless link quality information 710 with the wireless base station in communication, wireless link utilization information 720 with the wireless base station in communication, the number of nearby wireless base stations 730, and nearby wireless bases. Radio interference with stations 1, 2, 3, ... Consists of quality information 740, 750, 760, ....

【0056】

The radio link quality information 710 with the radio base station during communication includes radio operator identifier 711, radio base station identifier 712, frequency channel 713, received power level 714, received signal-to-noise ratio 715, received packet error rate 716, and transmission. Consists of power level 717. The radio link utilization rate information 720 with the radio base station during communication includes an average transmission rate 721, an average reception rate 722, a peak transmission rate 723, and a peak reception rate 724.

【0057】

Further, the radio interference information 740 with the neighboring radio base station 1 includes a radio operator identifier 741, a radio base station identifier 742, a frequency channel 743, a received power level 744, and a received signal to noise ratio 745. The meaning of these notification information is the same as the explanation in FIG.

【0058】

The wireless link measurement information 700 transmitted from the wireless terminal to the wireless resource management server shown in FIG. 7 and the wireless link measurement information 600 transmitted from the wireless base station to the wireless resource management server shown in FIG. 4 are the neighboring wireless base stations. There are some overlaps such as the number of 630,730 and the frequency channel 613,713.

【0059】

In addition, if the sum of the wireless link usage rate information 720 with the wireless base station under communication collected from each wireless base station is taken for each wireless base station, the value is the wireless link usage rate of the own station measured by the wireless base station. Should be equal to information 620. Further, the radio interference information 640 to 660 with the neighboring radio base station measured by the radio base station can be inferred to some extent from the interference information 740 to 760 with the neighboring radio base station measured by the radio terminal. For example, assuming that the wireless terminals are uniformly distributed in the area around the wireless base station, the wireless base to which the wireless terminal belongs is taken by averaging the reception levels from neighboring wireless base stations measured by a plurality of wireless terminals. It is possible to estimate the amount of interference received by a station from a nearby radio base station.

【0060】

As described above, the reason why the collected wireless link measurement information has redundancy is that the conventional wireless does not have the wireless link measurement function or the notification function to the wireless resource management server as described in the present embodiment. This is to realize operation in a system in which base stations and wireless terminals are mixed.

【0061】

For example, if there is a group of wireless terminals having a wireless link measurement information notification function shown in FIG. 7 under the control of a conventional wireless base station that does not have the wireless link measurement information notification function shown in FIG. 4, the line resource In the management server, the wireless link quality and utilization rate of each wireless base station and the degree of interference with other wireless base stations can be estimated from the wireless link measurement information 700 collected from the wireless terminal group. Conversely, if a conventional wireless terminal that does not have the wireless link measurement information notification function shown in FIG. 7 exists under the control of a wireless base station that has the wireless link measurement information notification function shown in FIG. 4, it is wireless. The resource management server can execute frequency change processing, transmission power control processing, and load distribution control processing mainly based on the radio link measurement information collected from the radio base station.

【0062】

The communication protocol for transmitting the wireless link measurement information 600 and 700 from the wireless base station or the wireless terminal to the wireless resource management server is arbitrary. For example, SNMP (Simple Network Management Protocol, RFC 2570-2576) is a suitable protocol for transferring such network management information. Further, the measurement information 700 may be transmitted from the wireless terminal to the wireless resource management server via or without the wireless base station. When performing via a wireless base station, efficiency can be improved by collectively transmitting the measurement information 700 from the subordinate wireless terminals to the wireless resource management server at the wireless base station.

【0063】

FIG. 8 is a schematic functional block diagram of the wireless resource management server. The control unit 87 is a CPU that controls each unit according to a program stored in the ROM 90 of the memory 88. The memory 88 has a RAM 89, which is a working memory for the CPU 87, and the ROM 90 described above. The frequency change control unit 91 has a function of controlling the change of the frequency channel for the radio base station, and the transmission power control unit 92 has a function of controlling the transmission power for the radio base station. Further, the load distribution control unit 93 between base stations has a function of distributed control of the load between radio base stations, and the radio link failure occurrence notification control unit 94 controls the notification of failure occurrence to the radio base stations. The communication unit 95 has a function of communicating with a wireless base station and a wireless terminal. These parts are commonly connected to the bus 96.

【0064】

FIG. 9 shows an operation flowchart of the wireless resource management server according to the first embodiment of the present invention. After performing the initialization process (step 451), the wireless resource management server starts the four timers T3, T4, T5, and T6 (step 452), and then enters the event waiting state (step 453). T3 specifies the interval at which the frequency channel of the radio base station is changed and the control process (step 454) is performed. T4 specifies the interval at which the transmission power control process (step 456) of the radio base station is performed. T5 specifies the cycle of control (step 458) for the wireless terminal. Further, T6 specifies a cycle for performing failure notification processing (step 460) when excessive interference is detected from the radio base station.

【0065】

These processes are performed independently with the timeout of timers T3 to T6. In addition, when the measurement information is received from the wireless base station or the wireless terminal (step 462), the measurement result is saved, and when the shutdown is started, the termination process (step 464) is performed.

【0066】

FIG. 10 shows an operation flowchart when the radio resource management server controls the frequency change of the radio base station in the first embodiment of the present invention. The radio resource management server reads out the information of the radio base station saved when the radio link measurement information is received for each radio base station from the beginning in the stored order (step 471). Next, from the read information, a list of neighboring radio base stations using the same frequency channel (F_cur) as the own station's frequency channel 613 is listed, and a radio base station list (NB_list) consisting of these neighboring radio base stations. To get (step 472).

【0067】

Next, the total received power level 644 (I_cur) of the radio base station group belonging to this radio base station list (NB_list) is calculated (step 473). The total of the received power levels is equivalent to the amount of interference. Next, from the read information, the total received power level is obtained for each of all frequency channels that can be used by the own station, and this is used as the amount of interference for that channel. Then, the total received power level (I_tar) from the neighboring radio base stations in the frequency channel (F_min) with a small amount of interference is acquired (step 474).

【0068】

Here, if the interference amount difference I_cur -I_tar is larger than the predetermined threshold I_fth (step 475), a radio resource control message is sent to the selected radio base station to instruct the frequency channel change from F_cur to F_min. (Step 476), the information about the radio base station whose frequency channel has been changed is deleted from the memory (step 477). The process ends when there is no more radio base station information to be read (step 478). The following method can also be considered as a modified example of the processing of steps 474 to 476 described above. That is, the total reception power level obtained in step 473 is larger than the total reception level of other radio base stations at frequencies other than the frequency currently used among the frequencies available to the selected radio base station. In some cases, change to a frequency other than the one currently in use.

【0069】

Here, the amount of interference (total received power level) from neighboring wireless base stations includes interference not only by the same wireless operator but also by systems of different wireless operators. When performing this frequency change process, all wireless terminals under the wireless base station are temporarily disabled, so keep the timer T3 value for a long time, or adjust to the time when the system is rarely used. It is desirable to have the timer T3 started. Further, in the above description, the calculation of I_cur and I_tar is performed by the radio base station frequency control process 454 of FIG. 9, but the calculation may be performed by the measurement result saving process 463 when the measurement result is saved. ..

【0070】

11 and 12 show an operation flowchart when the radio resource management server controls the transmission power of the radio base station in the first embodiment of the present invention. In this case as well, the radio base station information is read out in order for each radio base station from the beginning (step 481). Next, obtain a radio base station list (NB_list) that lists neighboring radio base stations that use the same frequency channel (F_cur) as the selected radio base station (own station) (step 483), and this radio base. Among the radio base stations included in the station list (NB_list), a list (NB_list1) showing a group of radio base stations belonging to the same radio operator as the selected radio base station is acquired (step 484), and the selected radio base station is also obtained. Obtain a list (NB_list2) indicating a group of wireless base stations that belong to a different wireless operator and can be controlled from the wireless resource management server (step 485).

【0071】

The reason for limiting to a group of radio base stations that can be controlled by the radio resource management server is that the measurement results of the radio link are transmitted to the server from all radio base stations including the radio base stations that cannot be controlled by the server. This is because all of these measurement results are stored in the server, and it is necessary to use only the measurement results of the radio base station that can be controlled by the server.

【0072】

The relationship between these radio base station lists (NB_list), (NB_list1), and (NB_list2) described above is shown in FIG.

【0073】

Here, among the radio base stations included in this radio base station list (NB_list1), the interference amount is reduced for base stations whose reception level exceeds the threshold value Ic_pc1 and whose current transmission power is equal to or higher than the lower limit value. Turn on the transmit power reduction flag FL_down for directional control (step 486). Also, among the radio base stations included in the list (NB_list2), for the base stations whose reception level exceeds the threshold value Ic_pc2 and the current transmission power is equal to or higher than the lower limit, the transmission power reduction flag FL_down is similarly turned on. (Step 487).

【0074】

The reason why the threshold value of the amount of interference is divided between the same wireless operator and other wireless operators is that the amount of interference with other wireless operators needs to be kept lower than the interference within the same wireless operator. In this way, after listing all the radio base stations whose reception level exceeds the threshold value in the other radio base stations, the process proceeds to the actual transmission power control process (FIG. 12). The stored radio base station information is read out in order for each base station from the beginning (step 488), and if the transmission power reduction flag FL_down of the selected radio base station is on (step 489), the selected radio base station is selected. Is sent a radio resource control message to instruct to reduce the transmit power by Delta_P1 (step 490).

【0075】

On the other hand, if FL_down is off in step 489 and the transmission power of the selected radio base station is less than or equal to the upper limit (step 491), a radio resource control message is transmitted to the selected radio base station to reduce the transmission power. Instruct to increase by Delta_P2 (step 492). In this way, by increasing the transmission power as much as possible as long as interference does not occur, the coverage range of the wireless operator's network can be expanded.

【0076】

FIG. 14 shows a flowchart of an operation in which the wireless resource management server instructs the wireless terminal to perform handover and distributes the load among the wireless base stations in the first embodiment of the present invention. First, the stored radio base station information is read out in order for each base station from the beginning (step 501), and the number of accommodated radio terminals N_m of the selected radio base station BS1 is acquired (step 502). The number of accommodated wireless terminals N_m is the number of accommodated wireless terminals 622 in the wireless link measurement information 600 shown in FIG.

【0077】

When the number of wireless terminals being accommodated exceeds the permissible threshold (N_th) that can be accommodated in the wireless base station BS1 and N_m> N_th (step 503), a nearby wireless base station is referred to while referring to the stored information. Among them, those belonging to the same operator as the selected wireless base station and having the smallest number of accommodated terminals are selected in order (step 504). Here, if there is a wireless base station BS2 in the vicinity that has a small number of accommodated terminals in the wireless base station of the same operator, there is one or more wireless terminals that currently belong to BS1 and can be connected to the selected nearby wireless base station BS2. Find out if there is one (step 505). This survey can be performed by referring to the radio interference information 740, 750, 760, etc. transmitted from the wireless terminal. Then, if there is such a wireless terminal, the wireless terminal is instructed to switch the connection destination wireless base station from BS1 to BS2 (step 506).

【0078】

On the other hand, if there are no wireless base stations of the same operator in the neighborhood, they belong to different operators, and only the wireless base stations with a small number of accommodated terminals are in the vicinity, the same processing is performed (step 507). In this way, when there is a large bias in the load (number of connected wireless terminals) between the same operator and different operators, the load can be distributed from the network side.

【0079】

FIG. 15 shows an operation flowchart when the wireless resource management server notifies the network management server of the occurrence of a failure in the wireless link in the first embodiment of the present invention. First, the radio resource management server reads the stored radio base station information in order from the beginning for each radio base station (step 521), and uses the same frequency channel (F_cur) as the selected radio base station (own station). Obtain a list of nearby radio base stations (NB_list) (step 522).

【0080】

Next, among the radio base stations included in this list (NB_list), a radio base station list (NB_list1) belonging to the same radio operator as the selected radio base station is acquired (step 523), and this list (NB_list) is added. Among the included radio base stations, a base station list (NB_list2) that belongs to a radio operator different from the selected radio base station and can be controlled from the radio resource management server is acquired (step 524). The meanings of NB_list1 and NB_list2 are the same as those described in FIG.

【0081】

Next, among the radio base stations included in the list (NB_list1), the failure notification flag FL_notify is turned on for the base stations whose reception level exceeds the threshold value Ic_fl1 and the failure notification flag FL_notify_done is off (step). 525). Also, among the radio base stations included in the list (NB_list2), the failure notification flag FL_notify is set to on for the base stations whose reception level exceeds the threshold value Ic_fl2 and the failure notification flag FL_notify_done is off (step). 526).

【0082】

Again, the reason why the threshold of the amount of interference (reception level) is divided between the same wireless operator and others is that the amount of interference with other wireless operators must be kept lower than the interference within the same wireless operator. Because there is. After marking the base stations for which failure notification should be performed, the radio base station information is read out in order (step 527), and the failure notification flag FL_notify is set to on (step 528). Sends a radio resource management message to a person's network management server: -Failure occurrence, -Interference amount, -Amount of transmitted power that the radio base station should attenuate, -Value of the frequency channel that the radio base station should change. ,-Or notify the area where the radio base station should be relocated (step 529).

【0083】

Further, for the radio base station that has given the notification, the failure notification flag FL_notify_done is set to off (step 530) to prevent duplicate failure notification. This failure notification flag may be manually set to off when the failure is resolved, or may be automatically set to off after confirming that the failure has been resolved in a stable manner.

【0084】

FIG. 16 shows an operation flowchart of the wireless terminal according to the second embodiment of the present invention. In the second embodiment of the present invention, when the wireless terminal notifies the wireless resource management server of the link quality, the value of the timer is switched in two stages according to the link quality. In the initial state, the value of timer T2 is set to T_fast (step 441), which has a short interval, and the average value Pa of the reception level from the radio base station during communication exceeds the high-speed measurement threshold Pa_th, and is stable with good quality. When this happens, the value of timer T2 is switched to T_slow with a longer interval (step 443).

【0085】

On the other hand, when the average value Pa of the reception level becomes equal to or less than the high-speed measurement threshold Pa_th, the interval of the timer T2 is shortened again by T_fast and restarted (step 444). The same control may be applied to a radio base station. In this way, by increasing the notification interval while the quality is good, the amount of notification traffic for control can be reduced and network congestion can be alleviated.

【0086】

FIG. 17 shows an operation flowchart of the wireless terminal according to the third embodiment of the present invention. In this case as well, the value of the timer when the wireless terminal notifies the wireless resource management server of the link quality is switched in two stages, and the criterion for switching is determined by the distribution value of the reception level. When the reception level variance value Pd from the radio base station during communication is lower than the high-speed measurement threshold value Pd_th (step 445), it is considered that the quality fluctuation is gradual and the measurement interval T2 is lengthened (step 443). If the variance value Pd exceeds Pd_th, set the measurement interval T2 shorter again (step 444). The same control may be applied to a radio base station.

【0087】

In this way, by increasing the notification interval while the quality fluctuation is gradual, it is possible to reduce the amount of notification traffic for control and alleviate network congestion.

【0088】

FIG. 18 shows the contents of the radio link measurement information 601 transmitted from the radio base station to the radio resource management server in the fourth embodiment of the present invention. The difference from the wireless link measurement information 600 in the first embodiment is that the wired link utilization rate information 670 of the own station is included. The wired link utilization rate information 670 of the own station is composed of a wired link physical speed 671, an average transmission rate 672, an average reception rate 673, a peak transmission rate 674, and a peak reception rate 675.

【0089】

The average transmission rate 672 and the average reception rate 673 are average bit rates obtained by dividing the number of bits transmitted / received via the wired link to which the wireless base station is connected during the measurement interval by the measurement interval, respectively. The peak transmit rate 674 and peak receive rate 675 represent the maximum number of bits transmitted and received over the wired link during any one second between measurement intervals.

【0090】

FIG. 19 shows an operation flowchart of load distribution between radio base stations according to the fourth embodiment of the present invention. In the fourth embodiment, the wireless resource management server realizes load distribution by instructing the wireless terminal to perform the handover. The difference from the load distribution (FIG. 14) in the first embodiment is steps 510 and 511. That is, as shown in these steps 510 and 511, the utilization rate of the wired link (ρ1 = average rate / physical speed of the wired link) is considered in addition to the number of wireless terminals accommodated by the wireless base station as a criterion for invoking load distribution. That is what you are doing. In this way, by performing load distribution according to the congestion status of the upstream wired links 300 to 304 in addition to the load of the wireless link, more efficient load distribution becomes possible in the entire network.

【0091】

FIG. 20 shows a configuration diagram of a wireless resource management system according to a fifth embodiment of the present invention. In this fifth embodiment, each of the wireless operators A, B, and C installs wireless resource management servers 41, 42, and 43. In this case, the wireless link measurement information transmitted by the wireless terminal or wireless base station is once collected by the wireless resource management servers 41, 42, and 43 of each wireless operator, and then collectively transferred to the wireless resource management server 40. Will be done.

【0092】

In this way, the amount of control traffic can be reduced by collecting the wireless link measurement information within each business operator and then collectively transferring the wireless link measurement information to the wireless resource management server of the third-party organization.

【0093】

FIG. 21 shows a schematic functional block diagram of the wireless resource management server 40 of this third-party organization, and the same parts as those in FIG. 8 are indicated by the same reference numerals. In FIG. 21, the communication service pricing unit 97 is added to the block of FIG. 8, and the other configurations are the same as those of FIG. The communication service price determination unit 97 has a function of determining and controlling the price of providing a communication service to an external network according to the quality of each wireless link of a plurality of wireless operators, and its operation. Details are shown in FIGS. 22 and 23.

【0094】

FIG. 22 shows an operation flowchart of the wireless resource management server according to the sixth embodiment of the present invention, particularly the communication service pricing unit 97. In FIG. 22, the same parts as those in FIG. 9 are indicated by the same reference numerals. In this sixth embodiment, the wireless resource management server determines the price at which the communication service via the network of each wireless operator is provided to the external network, and notifies the external network of this price (). Steps 802 ~ 805). At this time, the factors that determine this price are the quality of all wireless links belonging to the wireless operator i (Qwi), the speed of the wireless link (Swi), and the utilization rate of the wireless link (ρwi). These quality (Qwi), speed (Swi), and utilization rate (ρwi) are added and aggregated, respectively (step 803).

【0095】

For example, each quality of the wireless link (Qwi) is from the received packet error rate (616 in Figure 4), each speed of the wireless link (Swi) is from the physical speed of the wireless link (621 in Figure 4), and each utilization rate of the wireless link. (ρwi) can be calculated from the average transmission rate (623 in FIG. 4), the average reception rate (624 in FIG. 4), and the physical wireless link speed (621 in FIG. 4), respectively.

【0096】

Then, the market value Vi for the external network of the wireless operator i is calculated by using the predetermined price determination function f (Qwi, Swi, ρwi). The calculated market value Vi is notified from the wireless resource management server to the external network (step 805), and is also notified to each wireless operator and wireless terminal. In this way, by changing the line price according to the speed, quality, and utilization rate of the wireless link group, it is possible to always provide the optimum wireless operator's network to the external network.

【0097】

For example, as f (Qwi, Swi, ρwi), the following functions can be used. f (Qwi, Swi, ρwi) = αQwi + βSwi + γρwi However, α + β + γ = 1.

【0098】

Further, the above-mentioned price determination and notification processing are executed with the timeout of the timer T7 as a trigger after the initialization of the wireless resource management server.

【0099】

FIG. 23 shows an operation flowchart of the wireless resource management server according to the seventh embodiment of the present invention, particularly the communication service pricing unit 97. In FIG. 23, the same parts as those in FIG. 22 are indicated by the same reference numerals. In the seventh embodiment, in addition to the operation of the sixth embodiment shown in FIG. 22, a wireless resource management fee is paid from the external network to the entity operating the wireless resource management server, and as compensation thereof. , An operation has been added for the external network to receive a guarantee that the market value of the line of the wireless operator i does not exceed the predetermined upper limit Vi_max.

【0100】

That is, the third-party organization that operates the wireless resource management server sets the price for providing the communication service via the network of each wireless operator to the external network in advance between the third-party organization and the external network. Determine the operating fee for operation so that it is below the specified upper limit, and collect it from the operator of the external network. Then, when the price of the communication service is less than the upper limit value, the third-party organization provides the communication service to the external network operator at the price (market price) at that time.

【0101】

Therefore, when the calculated market value Vi exceeds the upper limit value Vi_max (step 806), the wireless resource management server performs a process of suppressing the market value Vi to Vi_max (step 807). Other processing is the same as that of the sixth embodiment of FIG.

【0102】

Needless to say, the operation flow of each device described above is realized by storing it as a program in a recording medium such as ROM in advance, reading it by a CPU, which is a computer, and executing it.

【0103】

As the eighth embodiment of the present invention, the method of the business model using the above-mentioned wireless resource management system will be described below with reference to the drawings. As an example, a case where a wireless communication carrier operates a wireless communication system such as a LAN in a three-story tenant building as shown in FIG. 24 will be described. Each floor of this tenant building is used by borrower-1 to borrower-3, and the owner of the tenant building manages the wireless resources of the wireless communication system operated by borrower-1 to borrower-3. Communication quality can be guaranteed and the load value of the building itself can be increased.

【0104】

Figure 25 shows the operation sequence of the embodiment of the business model method in this example. The owner of this building concludes a wireless resource management contract in the building with the owner of the wireless resource management server (step S1), and outsources the wireless resource management work using the wireless resource management server. Then, the borrower who wants to run the wireless communication business (for example, borrower-1) concludes a wireless resource usage contract with the owner of the building (step S2).

【0105】

When the borrower uses radio equipment such as a radio base station, the radio equipment information related to the radio equipment is registered with the radio resource management server through the owner of the building and the owner of the radio resource management server ( Steps S3 and S4), the radio equipment (for example, a wireless base station) is actually installed (step S5).

【0106】

The wireless resource management server acquires wireless link measurement information 600 (see Fig. 4) and 700 (see Fig. 7) from the registered wireless equipment and wireless terminals, and monitors the communication status of the wireless communication operator. That is, the occurrence of failures such as the occurrence of high load conditions and the occurrence of interference are monitored daily (steps S6-1 to S6-4). Then, when the wireless resource management server detects the high-load communication status (step S7), the borrower having the radio equipment in which the high-load communication status is occurring is passed through the owner of the wireless resource management server and the owner of the building. In response to this, for example, obstacle avoidance measures such as strengthening radio equipment and changing the installation position of radio equipment are presented (steps S8 to S10).

【0107】

Here, when another borrower (for example, borrower-2) uses the same radio equipment, a radio resource usage contract is concluded as described in the case of the previous borrower-1 (step S11). ). Then, the radio equipment information regarding the radio equipment of the borrower-2 is registered in the radio resource management server (step S12), and the radio equipment is actually installed (steps S13 and S14).

【0108】

The wireless resource management server acquires wireless link measurement information 600 or 700 from the registered borrower-2's wireless equipment or wireless terminal, and monitors the communication status on a daily basis (steps S15-1 to S15-2). At this time, if interference occurs between the base station, which is the radio equipment of the borrower-1 and the borrower-2 (step S17), the radio resource management server eliminates the interference with the radio equipment causing the interference. Instructed to change the frequency, change the transmission power, etc. (step S18), and present the interference avoidance measures. When the failure is recovered by this (step S19), the wireless resource management server reports to the owner (step S20).

【0109】

In this way, the owner of the wireless resource management server uses the wireless resource management server to monitor the daily wireless communication status, and when a failure is detected, automatic avoidance, failure notification, and failure resolution plan. It has come to provide a service for presenting. The owner of the wireless resource management server charges the owner of the building, who is the beneficiary of this service, for the management fee including the fee for the service (step S21), and the owner of the building wirelessly charges the owner of the building. The wireless resource management service fee is paid to the owner of the resource management server (step S25), but the building owner charges the borrower who has signed the wireless resource contract for the wireless resource usage fee. (Steps S23, S24).

【0110】

At this time, it is possible to make a difference in the level (type) of the service provided to the borrower and make a difference in the service fee according to the level of the service. For example, (1) automatic interference avoidance only service, (2) high-load communication status notification service in addition to (1) above, (3) presentation of failure avoidance countermeasures in addition to (2) above. Services, etc. can be considered. Regarding interference, there is also a business model method in which borrower-1 to borrower-3 are regarded as wireless communication carriers and a management contract is directly concluded with the owner of the wireless resource management server without going through the owner of the building. It is clear that it is possible. In this case, the owner of the wireless resource management server is entrusted with the wireless resource management of the wireless communication operator, and provides the contract user of the wireless communication operator with a service capable of providing a high-quality wireless communication environment. Will be done.

【0111】

FIG. 26 shows an outline of the functional block diagram of the wireless resource management server used in the business model method shown in FIG. 25, and the same parts as those in FIG. 8 are indicated by the same reference numerals. In FIG. 26, the fault handling unit 98 includes a frequency change control unit 91, a transmission power control unit 92, and a base station load distribution control unit 93, and these units 91 to 93 are shown in FIG. Each part 91 to 93 has the same function, receives wireless link measurement information 600 or 700 from wireless equipment, monitors the communication status of the wireless link, and detects the occurrence of a failure (interference or high load). , Take the workaround.

【0112】

In the database 100, information on service recipients who have concluded a wireless resource management contract, information on wireless equipment, information on service levels (types), information on service charges, and the like are registered. Based on the information registered in this database 100, the service charge billing unit 99 charges the building owner (or the building renter directly if not through the building owner) for the service charge. Is. Other configurations and functions are the same as those in FIG. 8, and the description thereof will be omitted.

【0113】

[Effect of the invention]

As described above, according to the present invention, the wireless network quality of a plurality of wireless operators is managed in an integrated manner, and the frequency channel, transmission power, accommodating terminal, etc. of the wireless base station are changed as necessary. This has the effect of enabling optimal operation of the shared wireless resources.

[Simple explanation of drawings]

[1] Contact to the first embodiment of the present invention is a configuration diagram of a radio resource management system Keru.

FIG. 2 is a schematic functional block diagram of a radio base station according to the first embodiment of the present invention.

FIG. 3 is an operation flowchart of a radio base station according to the first embodiment of the present invention.

FIG. 4 is a diagram showing the contents of wireless link measurement information transmitted from a wireless base station to a wireless resource management server in the first embodiment of the present invention.

FIG. 5 is a schematic functional block diagram of a wireless terminal according to the first embodiment of the present invention.

FIG. 6 is an operation flowchart of a wireless terminal according to the first embodiment of the present invention.

FIG. 7 is a diagram showing the contents of wireless link measurement information transmitted from a wireless terminal to a wireless resource management server in the first embodiment of the present invention.

FIG. 8 is a schematic functional block diagram of a wireless resource management server according to the first embodiment of the present invention.

FIG. 9 is an operation flowchart of a wireless resource management server according to the first embodiment of the present invention.

FIG. 10 is an operation flowchart when a radio resource management server performs frequency change control of a radio base station in the first embodiment of the present invention.

FIG. 11 is an operation flowchart (No. 1) when a radio resource management server controls transmission power of a radio base station in the first embodiment of the present invention.

FIG. 12 is an operation flowchart (No. 2) when the radio resource management server controls the transmission power of the radio base station in the first embodiment of the present invention.

13 is a diagram showing the relationships between the radio base station list (NB_list), (NB_list1), and (NB_list2) in FIGS. 10 and 11. FIG.

FIG. 14 is an operation flowchart when controlling a wireless terminal because the wireless resource management server distributes the load among wireless base stations in the first embodiment of the present invention.

FIG. 15 is an operation flowchart when the wireless resource management server notifies the network management server of the occurrence of a failure in the wireless link in the first embodiment of the present invention.

FIG. 16 is an operation flowchart of a wireless terminal according to a second embodiment of the present invention.

FIG. 17 is an operation flowchart of a wireless terminal according to a third embodiment of the present invention.

FIG. 18 is a diagram showing the contents of wireless link measurement information transmitted from a wireless base station to a wireless resource management server in a fourth embodiment of the present invention.

FIG. 19 is an operation flowchart of load distribution between radio base stations according to the fourth embodiment of the present invention.

FIG. 20 is a configuration diagram of a radio resource management system according to a fifth embodiment of the present invention.

FIG. 21 is a schematic block diagram of a radio resource management server 40 according to a fifth embodiment of the present invention.

FIG. 22 is an operation flowchart of a wireless resource management server according to a sixth embodiment of the present invention.

FIG. 23 is an operation flowchart of a wireless resource management server according to a seventh embodiment of the present invention.

FIG. 24 is a diagram showing an example of a tenant building for realizing the business model of the eighth embodiment of the present invention.

FIG. 25 is a diagram showing an operation sequence of a wireless resource management system for realizing a business model according to an eighth embodiment of the present invention.

FIG. 26 is a functional block diagram of a wireless resource management server for realizing a business model according to an eighth embodiment of the present invention.

[Explanation of symbols]

10 ~ 17 Wireless terminal 20 ~ 24 Wireless base station 30 ~ 32 Wired network 40 ~ 42 Wireless resource management server 50 External network 100 Service area of wireless operator A 101 Service area of wireless operator B 102 Service area of wireless operator C 20 1 to 208 Wireless link 61,75 Transmitter / receiver 62,76 Receiver 63,73 Reception control 64,78 Link quality measurement 65,79 Link utilization measurement 66,80 Interference measurement 67 Wireless terminal measurement results Detection unit 68 Data synthesis unit 69,85 Transmission unit 70,86 Transmission control unit 71,83,87 Control unit (CPU) 72,84,88 Memory 73,95 Communication unit 74,81 Message analysis unit 82 Transmission data synthesis unit 91 Frequency change control unit 92 Transmission power control unit 93 Inter-base station load distribution control unit 94 Wireless link failure occurrence notification unit 96 Bus 97 Communication service price determination unit 98 Failure processing unit 99 Service charge billing unit 100 Database