Mobile communication system, base station and mobile station

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to mobile communication systems and base stations and mobile stations.

【0002】

[Conventional technology]

Conventionally, in a mobile communication system including a base station, a mobile station, and a center, the center manages the position information corresponding to the identification number of the base station and the identification number of the mobile station. The center or mobile station identifies another mobile station based on this location information, and transmits a voice message, a text message, or the like.

【0003】

[Problems to be Solved by the Invention]

By the way, in the conventional mobile communication system, there is no means for a plurality of mobile stations to simultaneously receive the same information and display it on the display of each station. In order to achieve this, it is not unthinkable to provide a new channel for mobile stations to receive the same information at the same time. However, in recent years, channel shortages have become a problem with the increase in traffic volume, and it is not realistic to establish new channels.

【0004】

Therefore, an object of the present invention is to provide a mobile communication system that broadcasts information to a large number of mobile stations using a conventional channel.

【0005】

[Means for solving problems]

In order to achieve the above object, the base station of the present invention provides display information and transmission conditions for displaying the control channel signal to the mobile station in the wireless range in the base station intermittently transmitting the control channel signal to the mobile station. It includes a storage means for storing, a determination means for determining whether or not the transmission condition is satisfied, and a transmission means for simultaneously transmitting display information from the control channel to the mobile station when it is determined that the determination means is satisfied.

【0006】

Further, the display information may be composed of the first display information or the first display information and the second display information, and whether or not the first display information includes the second display information. The transmission means transmits the first display information by the simultaneous call channel which is a kind of control channel, and when there is the second display information, the second display is made by the broadcast channel which is another kind of the control channel. Send information.

【0007】

The first display information is information representing a heading, and the second display information is detailed information corresponding to the information representing the heading. Further, the storage means stores display information classified into a plurality of fields, and the first display information includes a field identifier for the mobile station to identify a field of display information. Further, the displayed information is one of weather information, disaster information, and traffic information.

【0008】

In the mobile station of the present invention, the receiving means for receiving the signal of the control channel transmitted intermittently, the extracting means for extracting the display information from the signal received by the receiving means, and the extracting means for extracting the display information. It is provided with a display means for displaying the display information when the display information is displayed. Further, the display information is composed of a first display information that can be received by a simultaneous call channel, which is a type of control channel, and a second display information that can be received by a broadcast channel, which is another type of control channel. In some cases, it is composed of one display information, the first display information indicates whether or not there is a second display information, and the extraction means extracts the first display information from the signals of the simultaneous call channel. The first extraction means, the determination means for determining whether or not there is the second display information from the extracted first display information, and the signal of the notification channel when the determination means determines that there is the second display information. It is provided with a second extraction means for extracting the second display information from the inside.

【0009】

Further, the first display information is information representing a heading, and the second display information is detailed information corresponding to the information representing the heading. Further, the display information is classified into a plurality of fields, the first display information includes a field identifier that identifies the display information, and the mobile station further controls with a storage means that stores one or more field identifiers in advance. An identifier determining means for determining whether or not the field identifier of the display information transmitted by the channel matches the field identifier stored in the storage means, and the extraction when the identifier determining means determines that the field identifier does not match. The means is provided with a prohibition means for prohibiting the extraction of display information.

【0010】

The mobile communication system of the present invention is a mobile communication system including a base station and a mobile station that intermittently receives a signal of a control channel transmitted intermittently from the base station, and the base station is displayed on the mobile station. A storage means for storing the display information of the above and its transmission condition, a determination means for determining whether or not the transmission condition is satisfied, and a control channel for displaying information to the mobile station when it is determined that the determination means is satisfied. The mobile station includes a transmitting means for simultaneous transmission, and the mobile station uses a receiving means for receiving the signal of the control channel to be intermittently transmitted, an extracting means for extracting display information from the signal received by the means, and the extracting means. It is provided with a display means for displaying the display information when the display information is extracted.

【0011】

The mobile communication system of the present invention is a mobile communication system composed of a center, a plurality of base stations, and a plurality of mobile stations, and the center transmits display information and display information for display on the mobile station. A storage means for storing the conditions, a determination means for determining whether or not the transmission condition is satisfied, and a control channel for transferring display information from the base station to the base station when it is determined that the determination means are satisfied. The mobile station includes a control means for transmitting, a receiving means for receiving the signal of the control channel to be intermittently transmitted, an extraction means for extracting display information from the signal received by the means, and a display by the extracting means. It is provided with a display means for displaying the display information when the information is extracted.

【0012】

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a schematic configuration of a PHS (Personal Handyphone System) mobile communication system according to the present invention. In the figure, the mobile communication system is connected to the public network 10 and mainly manages the location information of mobile stations. Center 11, exchange stations 12 to 14, and base stations 1 to 6 connected to exchange stations 12 to 14 (hereinafter referred to as From CS1 to 6 (also simply referred to as CS when collectively referred to), mobile stations 7 to 9 (hereinafter PS7 to 9, or simply PS when collectively referred to) existing in areas A to C indicating the service area of CS1 to 6 It is composed. The schematic configuration in the figure is the same as that of the conventional mobile communication system, but the internal configurations of CS and PS are different. Hereinafter, the same parts as those in the prior art will be omitted, and different parts will be described. <CS configuration> FIG. 2 is a block diagram showing a CS configuration.

【0013】

In the figure, the CS is roughly composed of an antenna 21, a communication unit 22, and a control unit 23. The communication unit 22 is a radio unit 221 that converts an intermediate frequency signal to a high frequency signal or a high frequency signal to an intermediate frequency signal, a modem unit 222 that performs QPSK modulation / demodulation between the radio unit 221 and the TDMA / TDD processing unit 223, and the time. It is composed of TDMA / TDD (Time Division Multiple Access / Time Division Duplex) processing unit 223 that controls transmission and reception by the split multiplex communication method. With this configuration, the communication unit 22 transmits and receives signals of various control channels (simultaneous call channel, broadcast channel, etc.) and communication channel signals in PHS.

【0014】

The control unit 23 stores a plurality of display information to be displayed on the mobile station in correspondence with a transmission condition indicating the transmission time and the like, and when the transmission condition is satisfied, the display information is stored as a message on the control channel. It controls the simultaneous transmission to PS on the top. Here, the control channels are the simultaneous call channel (hereinafter referred to as PCH) that has been conventionally used for simultaneous calls in PHS, and the broadcast information channel (hereinafter referred to as BCCH) that is used to notify control information from CS to PS. Call).

【0015】

More specifically, the control unit 23 includes an information storage unit 231, an interface unit 232, a transmission condition determination unit 233, and a transmission control unit 234. The information storage unit 231 stores a plurality of information records including display information for simultaneous transmission to the PS. Figures 3 (a) and 3 (b) show the data structure of two types of information records. Each information record shown in FIGS. (A) and (b) is composed of transmission conditions including a time zone and time when the display information should be transmitted and display information including display data to be displayed on the PS. Further, the display information includes one composed of the first display information and the second display information (Fig. (A)) and one composed of only the first display information (Fig. (B)). The first display information is transmitted through PCH and the second display information is transmitted through BCCH.

【0016】

FIG. 4 shows the data structure of the first display information. As shown in the figure, the first display information is composed of an information type, a group ID, and first display data. The information type is 4-bit data indicating whether the configuration of the display information is FIG. 3 (a) or FIG. 3 (b). Figure 5 shows the information type and the corresponding meaning. In FIG. 5, the x part of the information type indicates that the value is either 0 or 1. For example, if the information type is "1101", the display information is composed of the first display information and the second display information as shown in Fig. 3 (a), and if it is "1100", the display information is as shown in Fig. 3 (b). 1 Indicates that it consists of only display information.

【0017】

The information type is for the PS to determine whether or not the display information is included in the signal transmitted from the CS, and if the display information is included, to identify the configuration of the display information. is there. When the PCH message is used as a normal PHS control signal transmission function (for example, simultaneous call), the information type is "0xxx", which allows the PS to determine whether or not the signal contains display information. To do.

【0018】

The group ID indicates an identifier of the group (field) to which the display information belongs. Figure 6 shows the group ID and the group indicated by the group ID. The display information belongs to any of the groups shown in the figure. For example, if the group ID is "0010", the display information belongs to the traffic information. The group ID is used by PS to identify the group of the display information transmitted from CS. More specifically, by this identification, PS is used to determine the necessity / non-necessity of display display of the display information belonging to the group.

【0019】

FIG. 7 shows the correspondence between the configuration of the display information and the group to which the display information belongs. As shown in the figure, weather information, traffic information, the number of free wireless resources and time notification are configured as shown in Fig. 3 (b), and disaster information and shopping information are configured as shown in Fig. 3 (a). In this way, the configuration of the display information is predetermined according to the group to which the display information belongs.

【0020】

The first display data is data of 5 bytes or less representing a character string, a symbol, etc. to be displayed on the PS. The reason why it is set to 5 bytes or less here is that the area that can be allocated to the first display data in one PCH message (62 bits) is limited to 5 bytes. In this way, the first display data is limited to 5 bytes or less, but it is transmitted by PCH, which has been used conventionally in PHS and PS is constantly missing, so there is no need to provide a new channel. There is an advantage.

【0021】

More specifically, the first display data is a character code such as an ASCII code or a predetermined group-specific code. A group-specific code is a code pre-assigned to a specific term used in the group. For example, when the group is weather information, assign 3-bit values such as "001", "010", and "011" to terms indicating the area such as "Naganoken", "Shizuokaken", and "Aichiken", and "Hare", If you assign 5-bit values such as "00001" and "00010" to terms that represent weather such as "kumori" and "yuki" and store the correspondence table between codes and terms in PS, various weather conditions can be obtained depending on the combination of codes. Data showing information can be sent to PS.

【0022】

The second display information is composed of second display data representing a character string to be displayed on the PS. The second display data is a character code such as an ASCII code. The second display information has no limitation on the amount of data like the first display information. However, the area that can be allocated to the second display data in one BCCH message (62 bits) is 5 bytes. Therefore, when the second display data exceeds 5 bytes, the second display data is divided into 5 bytes and transmitted across a plurality of BCCH messages.

【0023】

The content of the second display data corresponds to the content of the first display data. For example, when the group is disaster information, if the first display data is data indicating a heading such as "Keihou", the second display data corresponds to the first display data such as "Aichiken Tobu Niboufufu Keihou Hatsurei". It is data which shows the detailed information to be done.

【0024】

The interface unit 232 is connected to the public network and exchanges data with the center 11 and other telephones (general telephones and PS outside the wireless range of CS) via the public network. Further, the interface unit 232 stores the information record in the information storage unit 231 when the information record is input from the center 11 via the public network. The transmission condition determination unit 233 repeatedly monitors the transmission conditions of each information stored in the information storage unit 231 and determines whether or not the transmission conditions are satisfied. When the transmission condition determination unit 233 determines that the transmission condition is satisfied, the transmission condition determination unit 233 reads out the display information of the information record and inputs it to the transmission control unit 234.

【0025】

When the display information of the information storage unit 231 is input by the transmission condition determination unit 233, the transmission control unit 234 creates a PCH message using the first display information, and if there is a second display information, the second display information is used. 2 Create a BCCH message using the displayed information. Then, the transmission condition determination unit 233 detects the transmission timing of the PCH and BCCH and transmits the PCH and BCCH messages via the TDMA / TDD processing unit 223, the modem unit 222, and the radio unit 221.

【0026】

FIG. 8 shows a PCH message format created by the transmission control unit 23 using the first display information. In the figure, the fields of reservation, call service type, and notification / reception instruction are PHS standards (2nd generation cordless telephone system standard 1st edition, radio system development center), so explanations will be omitted.

【0027】

The information type and group ID shown in the first display information are stored in the notification type field and the group ID field. The information No. field is a number assigned by the transmission control unit 23, which identifies individual display information. The information area field shown in octets 3 to 7 contains the first display data. FIG. 9 shows the BCCH message format created by the transmission condition determination unit 233 using the second display information.

【0028】

In the figure, the reservation, message type, and notification / reception instruction field are PHS standards, so description thereof will be omitted. The message number field is a serial number added to a plurality of messages representing one second display data. For example, the 15-byte second display data is divided into three BCCH messages, 5 bytes from the beginning. The transmission control unit 23 adds a serial number to each of these three BCCH messages from the BCCH message including the beginning of the second display data.

【0029】

The end bit field is a flag added to a message having a tail part of the second display data when one second display data is divided into a plurality of messages. That is, if the end bit field is "1", it means that the message has the end part of the second display data, and if it is "0", the message has a part other than the end part of the second display data. Show that.

【0030】

The information area fields of octets 3 to 7 contain the divided second display data. FIG. 16 is a flowchart showing the operation procedure of the CS control unit 23. In the figure, the transmission condition determination unit 233 monitors each transmission condition in a plurality of information records stored in the information storage unit 231. More specifically, the transmission condition determination unit 233 compares the clock (not shown) provided in the control unit 23 with the transmission time, transmission time zone, etc. indicated by the transmission condition (step 1).

【0031】

As a result of monitoring, if there is an information record that satisfies the transmission condition, the display information of that record is read out and input to the transmission control unit 234 (step 2). The transmission control unit 23 creates a PCH message using the first display information of the input display information (step 3). At this time, the transmission control unit 23 adds an information number unique to the display information. After that, the transmission control unit 23 detects the transmission timing of the PCH, and transmits the PCH message via the communication unit 22 at the detected transmission timing (steps 4 and 5).

【0032】

The transmission control unit 23 determines whether or not the second display information is present in the display information based on the information type in the first display information (step 7), and if it is determined to be present, the second display information is used. Create a BCCH message (step 8). At this time, the transmission control unit 23 adds the same information number as the information number added at the time of creating the previous PCH message to the BCCH message, and when the second display data is divided into a plurality of BCCH messages, the first 2 Add the message number, which is a serial number, in order from the BCCH message including the first part of the display data.

【0033】

The transmission control unit 23 detects the BCCH transmission timing, and transmits the BCCH message via the communication unit 22 at the detected transmission timing (steps 9 and 10). <PS configuration> FIG. 10 is a block diagram showing a PS configuration.

【0034】

In the figure, the PS is composed of an antenna 31, a communication unit 32, a control unit 33, a display 34, a voice processing unit 35, an input unit 36, a speaker 38, and a microphone 37. The communication unit 32 is a radio unit 321 that converts an intermediate frequency signal to a high frequency signal or an intermediate frequency signal to a high frequency signal, and a modem unit 322 that performs QPSK modulation / demodulation between the radio unit 321 and the TDMA / TDD processing unit 323. It is composed of a TDMA / TDD processing unit 323 that performs transmission / reception control by a time division multiplexing communication method, and a code code unit 324 that performs audio coding / decoding processing and amplification of audio input / output via a microphone 37 and a speaker 38.

【0035】

The control unit 33 receives the intermittently transmitted PCH and BCCH messages via the communication unit 32, extracts display information from the messages, and displays the information on the display 34. More specifically, the control unit 33 includes an extraction unit 331, a field determination unit 332, a group ID memory 333, a reception information memory 334, a display control unit 335, and a code table memory 336.

【0036】

The extraction unit 331 is composed of a determination unit 3311, a first extraction unit 3312, and a second extraction unit 3313. When the PCH message intermittently transmitted from the CS is input via the communication unit 32, the determination unit 3311 determines whether or not the first display information is included by checking the information type in the message, and if it is included. Further determines whether or not there is second display information (that is, whether the display information is composed of the first and second display information or only the first information).

【0037】

When the determination unit 3311 determines that the first display information is included, the first extraction unit 3312 extracts the first display information from the PCH message and outputs it to the display control unit 335. When the determination unit 3311 determines that the second display information is included, the second extraction unit 3313 controls the radio unit 321 to receive the BCCH message, whereby the BCCH message is transmitted to the communication unit 32. When the information is input to the extraction unit 331 via the above, the second display information is extracted from the BCCH message and output to the display control unit 335.

【0038】

The group ID memory 333 stores the required / unnecessary flag value, the group ID, and the additional characters in association with each other. FIG. 11 shows an example of the group ID memory 333. The required / unnecessary flag value has a one-to-one correspondence with each group ID, and indicates a group that needs to be displayed on the display 34 and a group that does not need to be displayed. The required / unnecessary flag value when required is "1", and when not required, it is "0". For example, in FIG. 11, since the required / unnecessary flag value of the group ID 0011 (number of free wireless resources) is 1, the display information belonging to the group of the number of free wireless resources needs to be displayed on the display 34. Indicates that there is. Further, since the required / unnecessary flag value of the group ID 0110 (shopping information) is 0, it indicates that the display information belonging to the shopping information group does not need to be displayed on the display 34. The required / unnecessary flag value is registered in the group ID memory 333 by the user of the PS via the input unit 36, and the user can arbitrarily change the value.

【0039】

The additional character indicates a character string to be added when the display information is displayed on the display 34. In the figure, "*" indicates that the display information is included in that part. "-" Indicates that no additional characters are added to the display information of the group. For example, in the case of the additional character "* ha * death" corresponding to the group ID "0001" (weather information), the two "*" have character strings represented by display information such as "Aichiken" and "Kumori", respectively. Enter, and as a whole, the character string "Aichiken Hakumori Death" is displayed on the display 34.

【0040】

When the determination unit 3311 determines that the first display information is included, the field determination unit 332 first reads the group ID in the PCH message, and then sets the required / unnecessary flag value corresponding to the group ID. It is read from the group ID memory 333, and it is determined whether or not it is necessary to display the display information on the display 34 according to the required / unnecessary flag value. If it is determined that the information is unnecessary as a result of the determination, the first extraction unit 3311 and the second extraction unit 3313 are stopped (prohibited) from extracting the display information.

【0041】

The reception information memory 334 contains the information No. in the first display information extracted by the first extraction unit 3312, and the information No. and the message No. in the second display information extracted by the second extraction unit 3313. Remember. This prevents the first display information and the second display information that were once extracted in the past from being duplicately extracted. That is, the first extraction unit 3312 reads the information No. in the first display information prior to the extraction of the first display information, and if the same information No. is stored in the reception information memory 334, the first display information Stop the extraction. Further, the second extraction unit 3313 reads the information No. and the message No. in the second display information prior to the extraction of the second display information, and the same information No. and the same message No. are stored in the reception information memory 334. If it is stored, the extraction of the second display information is stopped.

【0042】

The display control unit 335 creates a display image from the display data of the display information extracted by the extraction unit 331 and displays it on the display 34. The display control unit 335 uses the code table memory 336 and the additional characters of the group ID memory 333 to create the display image. The code table memory 336 is composed of an ASCII code table 3361, a weather information code table 3362, and a traffic information code table 3363.

【0043】

In the ASCII code table 3361, an ASCII code (character code) and a character image are stored in association with each other. As shown in FIGS. 12 (a) and 12 (b), the weather information code table 3362 stores the area code and the weather code in association with the character string image of the area and the weather.

【0044】

In the traffic information code table 3363, as shown in FIG. 13 (a), the traffic information code described in the octet 3 of the PCH message and the character string image of the traffic information are stored in association with each other, and in (b). As shown, the code described in octet 4 of the PCH message indicates that it is an ASCII code. The display control unit 335 uses the code table memory 336 to convert the code in the display information into a character image or a character string image, and if there is an additional character, the additional character is added and displayed on the display 34. ..

【0045】

For example, when the group ID of the first display information of the PCH is "0001" (weather information) and the first display data is "10000100", the display control unit 335 sets the upper 3 bits "100" of the first display data. Is converted to the character string image "Gifken", the lower 5 bits "00100" is converted to the character string image "Yuki", and the additional character "* had * death" is added to these character string images in Fig. 12 ( The image "Gifken Hayuki Death" is displayed on the display 34 as shown in c).

【0046】

In addition, the group ID of the first display information of PCH is "0010" (traffic information), the upper 4 bits of octet 3 of the first display data is "0010", and octet 4 is "00110010" (ASCII code). In the case of '2'), the display control unit 335 converts the upper 4 bits "0010" of the octet 3 into the character string image "Kojichu", converts the ASCII code of the octet 4 into the character image "2", and converts the octet 4 into the character image "2". The additional character "* Notame * Kilo Jutai" is added to these images, and the image "Kojichu Notame 2 Kilo Jutai" is displayed on the display 34 as shown in Fig. 13 (c).

【0047】

The display 34 is a liquid crystal display capable of displaying, for example, 1 character 8 * 8 dots and 3 * 10 alphanumeric kana characters. The voice processing unit 35 outputs a ringtone, a warning sound, and the like under the control of the control unit. By storing the voice control code that controls the output of the voice processing unit 35 in the code table memory 336 and including the voice control code in the first and second display information of the PCH message and the BCCH message, a character string is displayed on the display 34. The sound may be output instead of displaying.

【0048】

The input unit 36 is composed of a numeric keypad, a calling key, etc. (not shown), and is used for inputting a calling telephone number and also for registering a required / unnecessary flag value. FIG. 17 is a flowchart showing an operation procedure of each component of the PS control unit 33. The operation procedure of the control unit 33 will be described below by taking as an example a case where a PCH message and a BCCH message including display information of disaster information are transmitted from CS. Here, it is assumed that the first display data of the disaster information is "Keihou" and the second display data is "Aichiken Tobu Niboufu Keihou Hatsurei".

【0049】

In the figure, when the PCH message shown in FIG. 14 is input via the communication unit 32 (step 11), the extraction unit 331 determines whether or not the PCH message includes display information in the determination unit 3311. (Step 12). Since the information type is "1101", the determination unit 3311 determines that the display information is included. On the other hand, the field determination unit 332 refers to the group ID memory 333 and needs to display the display information on the display 34 from the required / unnecessary flag value corresponding to the group ID "0101" (disaster information) of the PCH message. Determine if it is unnecessary (step 13). Here, it is assumed that it is necessary.

【0050】

The first extraction unit 3312 extracts the first display data of the ASCII code (step 14), and the display control unit 335 converts the first display data from the ASCII code to a character image (step 15), and the display 34 Display in (step 16). The determination unit 3311 determines that there is the second display information from the previous information type "1101" (step 17), and causes the communication unit 32 to receive the BCCH message (step 18). The second extraction unit 3313 extracts the second display data from the BCCH message shown in FIG. 15 (step 19). The BCCH message shown in FIG. 15 contains the first 5 bytes of the second display data. The second extraction unit 3313 stores the BCCH message information No. and the message No. in the reception information memory 334, and then confirms the information No. and the message No. stored in the reception information memory 334, and makes a second. 2 Avoid extracting duplicate display data.

【0051】

After confirming that the second display data divided into a plurality of pieces has been extracted from the end bit of the BCCH message and the information No. and the message No. stored in the received information memory 334, the second extraction unit 3313 has extracted the data. The second display data is converted from the ASCII code into a character image, arranged in the order of the serial numbers of the message numbers, and displayed on the display 34 (step 20).

【0052】

The display control unit 335 may be configured to display the display data on the display 34 only when the display request for the display data is received from the input unit 36. For example, when the first display data is heading information that simply indicates the contents of the display information and the second display data is detailed information corresponding to the first display data, the display control unit 335 first sets the first. 1 The display data is displayed on the display 34, and when the display request for the second display data is received from the input unit 36, the second display data is displayed on the display 34. With this configuration, the user can check the first display data on the display 34 and then request the display of the second display data from the input unit 36 only when he / she wants to know more detailed information.

【0053】

Further, in the present embodiment, the CS stores the information record in advance or is input and stored from the outside, but the center 11 stores the information record in advance or is input and stored from the outside. You may.

【0054】

[Effect of the invention]

The base station of the present invention is a base station that intermittently transmits a control channel signal to a mobile station in a wireless range, and is a storage means for storing display information for displaying on the mobile station and its transmission conditions. And a determination means for determining whether or not the transmission condition is satisfied, and a transmission means for simultaneously transmitting display information from the control channel to the mobile station when it is determined that the determination means is satisfied.

【0055】

According to this configuration, the base station can simultaneously transmit the display information satisfying the transmission conditions to the mobile stations existing in the radio range by the conventional control channel. As a result, the mobile communication system can effectively utilize the conventional wireless resources without the need to provide a new channel. Further, the display information may be composed of the first display information or the first display information and the second display information, and does the first display information include the second display information? Whether or not is indicated, the transmission means transmits the first display information by the simultaneous call channel which is a kind of control channel, and when there is the second display information, the second display information is transmitted by the broadcast channel which is another kind of control channel. Send display information.

【0056】

Further, the first display information is information representing a heading, and the second display information is detailed information corresponding to the information representing the heading. Further, the storage means stores display information classified into a plurality of fields, and the first display information includes a field identifier for the mobile station to identify a field of display information.

【0057】

The displayed information is one of weather information, disaster information, and traffic information. In the mobile station of the present invention, the receiving means for receiving the signal of the control channel transmitted intermittently, the extracting means for extracting the display information from the signal received by the receiving means, and the extracting means for extracting the display information. It is provided with a display means for displaying the display information when the display information is displayed.

【0058】

As a result, the mobile station extracts and displays the display information when the signal of the control channel that is normally absent is received. Since the conventional control channel is used without the need to provide a new channel, the mobile station does not need to monitor the new channel. Further, the display information is composed of a first display information that can be received by a simultaneous call channel, which is a kind of control channel, and a second display information that can be received by a broadcast channel, which is another kind of control channel. In some cases, it is composed of the first display information, and the first display information indicates whether or not there is the second display information, and the extraction means extracts the first display information from the signals of the simultaneous call channel. The first extraction means to be used, the determination means for determining whether or not there is the second display information from the extracted first display information, and the notification channel when the determination means determines that the second display information is present. It is provided with a second extraction means for extracting the second display information from the signal.

【0059】

Further, the first display information is information representing a heading, and the second display information is detailed information corresponding to the information representing the heading. Further, the display information is classified into a plurality of fields, the first display information includes a field identifier that identifies the display information, and the mobile station further controls with a storage means that stores one or more field identifiers in advance. An identifier determining means for determining whether or not the field identifier of the display information transmitted by the channel matches the field identifier stored in the storage means, and the extraction when the identifier determining means determines that the field identifier does not match. The means is provided with a prohibition means for prohibiting the extraction of display information.

【0060】

With this configuration, the mobile station extracts and displays only the display information of the field of the field identifier stored in the storage means in advance from the signal of the control channel. As a result, the mobile station can display only the display information of the field that the user needs to display.

[Simple explanation of drawings]

[Figure 1]

A schematic configuration of a PHS mobile communication system according to the present invention is shown.

[Figure 2]

It is a block diagram which shows the structure of CS.

[Fig. 3]

(a) (b) The data structure of two types of information records is shown.

[Fig. 4]

The data structure of the first display information is shown.

[Fig. 5]

Indicate the meaning corresponding to the information type.

[Fig. 6]

The group ID and the group indicated by the group ID are indicated.

[Fig. 7]

The correspondence between the structure of the display information and the group to which the display information belongs is shown.

[Fig. 8]

The PCH message format created by the transmission control unit 23 using the first display information is shown.

[Fig. 9]

The BCCH message format created by the transmission condition determination unit 233 using the second display information is shown.

[Fig. 10]

It is a block diagram which shows the structure of PS.

[Fig. 11]

An example of group ID memory 333 is shown.

[Fig. 12]

(a) (b) Shows the contents of the weather information code table 3362. (c) An example of displaying weather information on the display 34 is shown.

[Fig. 13]

(a) (b) Shows the contents of the traffic information code table 3363. (c) An example of displaying traffic information on the display 34 is shown.

[Fig. 14]

An example of a PCH message is shown.

[Fig. 15]

An example of a BCCH message is shown.

[Fig. 16]

It is a flowchart which shows the operation procedure of the control part 23 of CS.

[Fig. 17]

It is a flowchart which shows the operation procedure of the control part 33 of PS.

[Explanation of symbols]

21 antenna 22 Communication Department 23 Control unit 221 Radio section 222 Modem section 223 TDMA / TDD processing unit 231 Information storage 232 Interface section 233 Transmission condition judgment unit 234 Transmission control unit 31 antenna 32 Communication Department 33 Control unit 34 display 35 Speech processing unit 36 Input section 38 speaker 37 Mike 321 Radio section 322 Modem section 323 TDMA / TDD processor 324 Codec section 331 Extractor 332 Field Judgment Department 333 Group ID memory 334 Received information memory 335 Display control unit 336 code table memory