JP2665195B2 - Method of displaying individual number of mobile station in MCA system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an MCA (Multi C
The present invention relates to a method for displaying an individual number of a mobile station in a channel access, and particularly to a method for identifying a mobile station during a call.

[0002]

2. Description of the Related Art In an MCA system, one relay station and a plurality of mobile stations form a group, and each mobile station communicates via the relay station. FIG. 2 is a block diagram showing an example of the MCA system, in which one relay station 14 and a plurality of mobile stations 12, 13, 14 form a group.

[0003] When no call is made, as shown in FIG.
4 constantly sends a user access permission signal to each of the mobile stations 11, 12, and 13. For example, when the mobile station 11 performs group communication with other mobile stations 12 and 13, the mobile station 11 transmits an individual access transmission right acquisition request. The relay station 14 transmits a signal to the relay station 14 and receives the transmission right acquisition request signal.
An individual access permission signal is transmitted to the mobile stations 12 and 13, and transmission of a voice signal to the other mobile stations 12 and 13 is prohibited.

[0004] The mobile station 11 transmits a user transmission right control message signal to the relay station 14 using the RCCH3 of the functional channel specified in the RCR / STD-32 digital MCA system standard (mobile radio center).
Send to This user transmission right control message signal is configured as shown in FIG. 4, and the upper 6bi of the first octet.
At the same time as writing the individual access transmission right acquisition request signal at t, the mobile station identification number including the individual number previously assigned to the mobile station 11 shown in FIG. 7A is written into all the bits of the fourth to seventh octets.

[0005] The relay station 14 is an RCR / STD-32
The common access control message signal is returned to the mobile stations 11, 12, and 13 using the function channel RCCH1 defined in the digital MCA system standard. The common access control message signal is configured as shown in FIG. 5 and writes a user access permission signal in the first to third octets 3 to 5 bits, and also writes all the second to fifth octets of all bits.
Then, the mobile station identification number including the individual number assigned to the mobile station 11 shown in FIG.

When the mobile station 11 terminates the call, it uses the RCCH3 in the same manner as the individual access transmission right acquisition request signal, and sends an individual access transmission right release request to the upper 6 bits of the first octet of the user transmission right control message signal. The signal is written, and all the bits of the fourth to seventh octets are written in FIG.
The mobile station identification number including the individual number previously assigned to the mobile station 11 shown in FIG.

[0007] Upon receiving the user transmission right control message signal in which the individual access transmission right release request signal is written, the relay station 14 transmits the user transmission control message signal to all the mobile stations 11, 12, and 13 using the RCCH1. Send. The user transmission control message signal is configured as shown in FIG. 6 and writes a user access permission signal in the fourth to fifth bits of the first octet, and also transmits predetermined information, for example, all 0s, to all bits of the second to fifth octets. Is written and transmitted to all the mobile stations 11, 12, and 13.

[0008] The mobile station 11 that has received the user transmission control message signal recognizes that its own transmission right release request has been accepted by identifying the user access permission signal.

Next, the operation of the mobile station in the conventional MCA system will be described. FIG. 9 is a main block diagram of a conventional mobile station. As shown in FIG. 9, the mobile station includes a transmitting / receiving unit 10 having an antenna 80 for transmitting / receiving a user transmission right control message signal, a user transmission control message signal, and a common access message signal to / from a relay station. A signal generator 20 for generating a message signal, a signal analyzer 300 for analyzing a received user transmission control message signal and a common access control message signal, and an individual for storing a unique individual number assigned to a mobile station in advance. A number storage unit 50, a comparison unit 400 for comparing the individual number extracted by the signal analysis unit with the individual number of the own station stored in the individual number storage unit, and outputting the result as a logical signal; LED 600 for lighting / extinguishment display corresponding to a logic signal to be performed, and a microphone 70 having a press key
It is composed of

[0010] When requesting group communication, the user of the mobile station 11 first confirms that the LED 600 is off. In a non-communication state in which all the mobile stations 11, 12, and 13 in the group have not acquired the transmission right, the relay station 14 constantly transmits the common access control message shown in FIG. LE by identifying the embedded user access permission signal
D600 is extinguished.

After confirming that the LED has been turned off, the user presses a press key (not shown) provided in the microphone 70 (ON state). The press key ON information is sent to the signal creation unit 20.
And the transmission right acquisition / release signal generation unit 21 receives it. The transmission right acquisition / release signal generation unit 21 controls the individual number reading unit 22 to read the individual number of the own station stored in the individual number storage unit 50 in advance, and the mobile station identification number shown in FIG. Is written in the fourth to seventh octets of the user transmission right control message signal shown in FIG. 4, and an individual access transmission right acquisition request signal is written in the upper 6 bits of the first octet. 14 to be transmitted.

The relay station 14 identifies the mobile station 11 that has transmitted the individual access transmission right acquisition request signal from the mobile station identification number written in the received user transmission right control message signal, and performs the common access control shown in FIG. The identified mobile station identification number is written in the second to fifth octets of the message signal, and an individual access permission signal is written in three to five bits of the first octet, so that all mobile stations 11, 12, and 1 in the group are written.
Send to 3

[0013] The common access control message signal is received by the transmission / reception section 10 and transmitted to the signal analysis section 300. The individual number extracting unit 310 of the signal analyzing unit 300 is configured to output 3 to 5 bits of the first octet of the common access control message signal.
, An individual access permission signal is identified from
An individual number is extracted from the mobile station identification number written in the octet, and sent to the individual number matching unit 410 of the comparing unit 400.

The individual number collating section 410 controls the individual number reading section 420 to read out the individual number of the own station stored in the individual number storage section 50, and receives it from the individual number extracting section 310 of the signal analyzing section 300. The matching is performed with the individual number, and the matching result is sent to the LED driving unit 430 as a logical signal.

The logical signal output from the individual number collating unit 310 is read from the individual number storing unit 50 with the individual number constituting the mobile station identification number written in the common access control message signal received from the relay station 14. If the individual number of the own station matches, for example, a logical 0 is output, and if not, a logical 1 is output.

The LED driving section 430 drives the LED according to the logic signal output from the individual number collating section. When the logic is 0, the LED is extinguished so that the user recognizes that the own station has acquired the individual access transmission right. When the logic is 1, the LED is turned on to allow other mobile stations to individually access. The transmission right is being acquired, and the user is made aware of the prohibition of sending the individual transmission right acquisition request signal.

When the call ends and the user releases the microphone press key (OFF state), the press key
The FF information is sent to the signal creation unit 20 and the signal creation unit 2
The transmission right acquisition / release signal generation unit 21 of 0 writes the individual access transmission right release request signal in the upper 6 bits of the first octet of the user transmission right control message signal shown in FIG. The mobile station identification number including the individual number of the station is transmitted to the relay station 14 via the write / transmit / receive unit 10.

The relay station 14 having received the user transmission right control message signal identifies the individual number included in the mobile station identification number and the individual access transmission right release request signal, and outputs the user transmission control message signal shown in FIG. A user access permission signal is written in 4 to 5 bits of the first octet, and a mobile station identification number including an individual number of the mobile station 11 is written in 2 to 5 octets, and mobile stations 11 and 1 in the group are written.
Transmit to 2 and 13.

Each of the mobile stations 11, 12, and 13 receiving this user transmission control message signal transmits the first octet 4 to
The LED 600 is turned off by identifying the user access permission signal written in 5 bits.

[0020]

The above-mentioned conventional MCA
A mobile station in the system has a user transmission right control message signal in which an individual access transmission right acquisition request signal transmitted from a mobile station desiring transmission during group communication and a mobile station identification signal including an individual number of the own station are written. A common access control message signal in which an individual access transmission right acquisition request signal transmitted from the relay station and a mobile station identification signal including its own number are written in response to the Receives, extracts the individual number from the mobile station identification number, compares it with its own individual number, and when matched, LED
Is turned off to recognize that the own station has acquired the transmission right, and when there is a mismatch, the LED is lit to recognize that the other station is acquiring the transmission right. The station could not recognize that it was acquiring transmission rights.

Therefore, in order to identify the caller, for example, the name of the caller is transmitted at the start of the voice call to notify the other mobile stations in the group which mobile station is transmitting. However, in the method of notifying the caller name or the like at the start of a call by a voice signal, in a MCA system in which the call time is limited to a maximum of 5 minutes, a limited call time is wasted, and the number of callers is limited. This makes it difficult to effectively use the required call time, which makes it difficult to sufficiently transmit necessary information.

[0022] Further, if the call sound quality is not always sufficient, there is a problem that it is difficult to specify the caller accurately.

An object of the present invention is to display an individual number of an originating mobile station on a mobile station other than the originating mobile station at the time of group communication, thereby making it possible to easily specify a caller.
An object of the present invention is to provide a method for displaying an individual number of a mobile station in a system.

[0024]

According to the present invention, there is provided a method of displaying an individual number of a mobile station in an MCA system, wherein the relay station and the plurality of mobile stations form a group and perform a group communication when the plurality of mobile stations perform group communication. The relay station transmits a common access control message signal including a user access permission signal indicating a non-communication state to all the mobile stations constituting the group in the non-communication state in which none of the mobile stations has acquired the transmission right. Wherein the mobile station transmits to the relay station a user transmission right control message signal including a transmission right acquisition request signal or a transmission right release request signal and a pre-assigned individual number of the own station to the relay station; The relay station that has received the message transmits an individual access permission signal for granting a transmission right and the transmission right acquisition request signal when the relay station identifies the transmission right acquisition request signal. The mobile station transmits the common access control message signal including the individual number of the mobile station, the user access permission signal that permits release of the transmission right when the transmission right release request signal is identified, and the transmission right release request signal. The mobile station of the MCA system for transmitting a user transmission control message signal including an individual number of a station to all the mobile stations constituting a group, receiving the common access control message signal and transmitting the user access permission signal to the mobile station. When identified, specific information indicating that there is no call is displayed on all the mobile stations constituting the group.

Further, when the relay station and a plurality of mobile stations form a group and perform group communication, when the plurality of mobile stations have not acquired the transmission right, the relay station is in a non-communication state. A common access control message signal including a user access permission signal indicating that the mobile terminal is in a call state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. When transmitting a user transmission right control message signal including the pre-assigned own station's individual number to the relay station, and receiving the user transmission right control message, the relay station identifies the transmission right acquisition request signal. The common access control message signal including the individual access permission signal for granting the transmission right and the individual number of the mobile station that transmitted the transmission right acquisition request signal. A group includes a user transmission control message signal including a user access permission signal for permitting release of a transmission right when the transmission right release request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal. In the mobile station of the MCA system transmitting to all of the mobile stations, the mobile station that has received the common access control message signal and transmitted the transmission right acquisition request signal when identifying the individual access permission signal is a display unit. All the mobile stations other than the mobile station that has transmitted the transmission right acquisition request signal have the individual number of the mobile station that has transmitted the transmission right acquisition request signal indicating that the mobile station is the group communication. Together with the display on the display unit.

Further, when the relay station and a plurality of mobile stations form a group and perform group communication, when the plurality of mobile stations have not acquired the transmission right, the relay station is in a non-communication state. A common access control message signal including a user access permission signal indicating that the mobile terminal is in a call state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. When transmitting a user transmission right control message signal including the pre-assigned own station's individual number to the relay station, and receiving the user transmission right control message, the relay station identifies the transmission right acquisition request signal. The common access control message signal including the individual access permission signal for granting the transmission right and the individual number of the mobile station that transmitted the transmission right acquisition request signal. A group includes a user transmission control message signal including a user access permission signal for permitting release of a transmission right when the transmission right release request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal. In the mobile station of the MCA system transmitting to all the mobile stations, the mobile station that has received the user transmission control message signal and identified the transmission right release request signal and transmitted the transmission right release request signal, The display information of the section is deleted, and specific information indicating that there is no communication is displayed on all the mobile stations including the mobile station that transmitted the transmission right release request signal.

Furthermore, when the relay station and a plurality of mobile stations form a group and perform group communication, when the plurality of mobile stations have not acquired a transmission right, the relay station is in a non-communication state. A common access control message signal including a user access permission signal indicating a no-communication state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. And transmitting a user transmission right control message signal including the individual number of the own station pre-assigned to the relay station, the relay station receiving the user transmission right control message,
Transmitting the common access control message signal including an individual access permission signal for granting a transmission right when the transmission right acquisition request signal is identified and an individual number of a mobile station that has transmitted the transmission right acquisition request signal; A user transmission control message signal including a user access permission signal that permits release of a transmission right when a request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal is transmitted to all the mobile stations constituting a group. In the mobile station of the MCA system for transmitting to a station, the mobile station includes an individual number storage unit for storing the self-assigned individual number which has been allocated in advance, identification information indicating that the mobile station is in a no-communication state, and a transmission right. A display unit that displays the individual number of the mobile station that has acquired the common access control message signal transmitted by the relay station; Receiving the transmission control message signal, transmitting the transmission right acquisition request signal or the transmission right release request signal from the common access control message signal or the mobile station identification number included in the user transmission control message signal. An individual number extractor for extracting the individual number of the mobile station, a buffer memory for temporarily storing the individual number extracted by the individual number extractor, and an individual number temporarily stored in the buffer memory in a predetermined data format. A display data generating unit to be converted; and the table data generating unit generates, when the common access control message signal received or the user transmission control message signal identifies the user access permission signal, specific information indicating the non-communication state when identifying the table data. Displayed on the display unit via the unit, and when the individual access permission signal is identified, the The individual number extracted by the individual number extracting unit is read from the memory unit, and is displayed on the display unit via the display data generating unit together with the specific information indicating that the communication is a group communication, and the transmission right release permission signal is identified. When identifying the individual access permission signal, the display data generating unit erases the individual number displayed on the display unit and the specific information indicating that the communication is a group communication and indicates the specific information indicating the non-communication state. A signal analysis unit comprising a signal type identification unit to be displayed on the display unit, an individual number reading unit for reading the individual number of the own station from the individual number storage unit, and an individual number extracted by the individual number extraction unit. A comparison unit comprising a comparison unit for comparing a number with an individual number of the own station read from the individual number storage unit and outputting a comparison result to the signal type identification unit. It is characterized by the following.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a main part relating to the setting of a communication path of a mobile station in the MCA system of the present invention. FIG. 2 is a system configuration diagram showing an example of the MCA system. FIG. 3 is a sequence diagram between a mobile station and a relay station during group communication. FIG. 4 is a configuration diagram of a user transmission right control message signal. FIG. 5 is a configuration diagram of the common access control message signal. FIG. 6 is a configuration diagram of a user transmission control message signal. FIG. 7 is a configuration diagram of a mobile station identification number, (A) shows a signal format, and (B)
FIG. 4 is a diagram showing assignment of identifiers and individual numbers. FIG.
5 is a flowchart for explaining a reception operation of a mobile station in a CA system.

Here, the relay station 1 shown in FIG.
4 will be described with an example of group communication based on the configuration of the mobile stations 11, 12, and 13.

As shown in FIG. 1, mobile stations 11, 12, 1
Reference numeral 3 denotes a transmission / reception unit 10 having an antenna 80 for transmitting / receiving a user transmission right control message signal, a user transmission control message signal, and a common access control message signal to / from the relay station 14, and generates a user transmission right control message signal. A signal creating unit 20, a signal analyzing unit 30 for analyzing the received user transmission control message signal and the common access control message signal, and an individual number storing unit 50 for storing a unique individual number assigned to the mobile station in advance. The comparison unit 40 compares and compares the individual number extracted by the signal analysis unit with the individual number of the own station stored in the individual number storage unit and sends out the result. The signal analysis unit extracts based on the result of the comparison and comparison. And a microphone 70 provided with a press key.

The signal creating section 20 receives the ON / OFF information of the press key of the microphone and reads the individual number from the individual number storage section when receiving the ON / OFF information of the microphone, and the ON / OFF information of the press key. And a transmission right acquisition / release signal generation unit 21 for generating a user transmission right control message.

The signal analyzing section 30 includes an individual number extracting section 31 for extracting an individual number included in the mobile station identification number of the user transmission control message signal and the common access control message signal received from the relay station via the transmitting / receiving section. A signal type identification unit 32 for identifying whether an individual access permission signal or a user access permission signal from a user transmission control message signal and a common access control message signal received from a relay station via a transmission / reception unit, and an individual number extraction unit. A buffer memory unit 33 for temporarily storing an individual number, and a display data generating unit 34 for reading the individual number from the buffer memory unit and converting it into display data in response to the comparison result of the individual number from the comparing unit. I have.

The comparing section 40 includes an individual number reading section 42 for reading the individual number of the own station from the individual number storing section 50, and an individual number and an individual number reading section extracted by the individual number extracting section of the signal generating section. It comprises an individual number collating unit 41 for comparing and collating the individual number of the own station read from the storage unit and outputting the collation result to the signal type identifying unit of the signal analyzing unit.

First, the operation in the no-call state will be described. In a non-communication state in which none of the mobile stations 11, 12, and 13 has acquired the transmission right, as in the conventional case, the relay station 1
4, the signal analyzer 30 receives the common access control message transmitted constantly from the transmitter 4 via the transceiver 10.

This common access control message is shown in FIG.
The user access permission signal is written in the 3rd to 5th bits of the first octet, and all bits “0” are written in the 2nd to 5th octets. Signal analyzer 30
The signal type identification unit 32 identifies that there is no call from the user access permission signal, and the display data generation unit 34
To display on the display unit 60 information indicating that there is no call, for example, “GR”, and the display unit 60 displays “GR”.

Therefore, the user of each of the mobile stations 11, 12, and 13 can recognize that there is no communication by recognizing the "GR" display on the display unit 60.

When the mobile station 11 desires to make a call, the user of the mobile station 11 checks the "GR" displayed on the display unit to recognize that there is no call, and uses the same method as in the prior art. Transmitting a user transmission right control message signal shown in FIG. 4 in which the individual access transmission right acquisition request signal and the mobile station identification number including the individual number of the own station are written to the relay station 14,
The relay station 14 sends the common access control message signal shown in FIG. 5 in which the individual access permission signal and the mobile station identification number including the individual number of the mobile station 11 are written, to the mobile stations 11, 12, and 13.
Send to

When the mobile station 11 terminates the call, it relays the user transmission right control message signal shown in FIG. 4 in which the individual access transmission right release request signal and the mobile station identification number including the individual number of the own station are written. The relay station 14 transmits a user transmission control message signal in which an individual access transmission right release permission signal and a mobile station identification number including an individual number of the mobile station 11 are written to the mobile stations 11, 12, and 13. Send to

Next, referring also to the flowchart shown in FIG. 1 and FIG. 8, a user transmission control message signal and a common access signal transmitted by the relay station in response to the user transmission right control message signal transmitted from the mobile station 11 will be described. The control message signal receiving process will be described.

The common access control message signal transmitted by the relay station 14 in response to the transmission right acquisition request of the mobile station 11 is such that an individual access permission signal is transmitted in 3 to 5 bits of the first octet shown in FIG. Has a mobile station identification number including an individual number of the mobile station 11 written therein. In the case of the user transmission control message signal for the transmission right release request, the user access permission signal is written in 4 to 5 bits of the first octet shown in FIG.

The common access control message signal or the user transmission control message signal transmitted by the relay station 14 is:
The signal is received by the transmission / reception unit 10 (S1) and transmitted to the individual number extraction unit 31 and the signal type identification unit 32 of the signal analysis unit 30.
The individual number extracting unit 31 is configured to write the common access control message signal or the second to fifth octets of the user transmission control message signal as shown in FIG.
Is extracted (S2), and the identifier of the mobile station identification number is determined (S3).

The identifier is 2 bits as shown in FIG.
And extracts an individual number corresponding to the identifier (S4). As shown in FIG. 7B, the identifier is “0”.
When the bit is "0", "0-10" bits are extracted as individual numbers, and when the identifier is "11", "0-1"
7 ”bit is extracted as an individual number. The individual number extracting unit 31 temporarily stores the individual number extracted in this way in the buffer memory unit 33 and sends it to the individual number matching unit 41 of the comparing unit 40.

The individual number collating unit 41 includes an individual number reading unit 42
To read the individual number of the own station from the individual number storage unit 50 (S5), and compare and collate with the individual number extracted by the individual number extraction unit 31 of the signal analysis unit 30 (S6). The signal is sent to the signal type identification unit 32 of the analysis unit 30.

If the collation results match, the signal type identification unit 32 recognizes that the own station (mobile station 11) has acquired or released the transmission right (S7), and the signal received from the transmission / reception unit 10 , It is determined whether the signal is a common access control message signal or a user transmission control message signal (S8).

In the case of the common access control message signal, the individual access permission signal is written in 3 to 5 bits of the first octet shown in FIG. In the case of a user transmission control message signal, a user access permission signal is written in 4 to 5 bits of the first octet.

When identifying the user access permission signal, the signal type identification unit 32 instructs the display data generation unit 34 to delete the display information displayed on the display unit 60 (S
9) When the request to release the individual access transmission right is received and the state of no call is indicated, and the individual access permission signal is identified, the data conversion of the individual number is performed on the display data generation unit 3.
4 (S10), the display data generation unit 34 reads the individual number from the buffer memory unit 33, sends the individual number together with the information "GR" indicating that the communication is a group communication, and displays it on the display unit 60 (S11). I do. The individual number displayed at this time is the own number of the own station, and the user of the mobile station 11 can recognize that the own station has acquired the transmission right.

When the individual numbers are collated by the individual number collating unit 41 of the comparing unit 40 (S6), if they do not match, it is recognized that another station (mobile station 12 or 13) has acquired or released the transmission right (S12). ), And identifies whether the signal received from the transmission / reception unit 10 is a common access control message signal or a user transmission control message signal (S13). In the case of the common access control message signal, the individual access permission signal is written in 3 to 5 bits of the first octet shown in FIG. In the case of a user transmission control message signal, a user access permission signal is written in 4 to 5 bits of the first octet.

When identifying the user access permission signal, the signal type identification unit 32 instructs the display data generation unit 34 to delete the display information displayed on the display unit 60 (S1).
4) Then, when the individual access transmission right release request is accepted and the state of no call is indicated, and the individual access permission signal is identified, the data conversion of the individual number is performed on the display data generation unit 3.
4 (S15), the display data generation unit 34 reads the individual number from the buffer memory unit 33, sends the individual number together with the information "GR" indicating that the communication is a group communication, and displays it on the display unit 60 (S16). I do. The individual number displayed at this time is the individual number of the other station, and the user of the mobile station 11 can recognize that the other station (mobile station 12, 13) has acquired the transmission right.

As described above, the mobile station 11 having acquired the transmission right
Display unit 60 displays information “GR” indicating that the communication is a group communication and the individual number of the own station.
The display units 60 of the mobile stations 1 and 2 display the mobile station 1 that has acquired the transmission right.
Since the individual number 1 is displayed, the mobile stations 12 and 13 can specify the caller. Therefore, the caller does not need to notify the information specifying the caller, such as his / her name, by voice prior to the start of the call, and the limited call time can be used as effectively as possible.

Further, the mobile stations 12 and 13 transmit the information indicating the group call displayed on the display unit and the mobile station 1.
Since it is possible to recognize that the other mobile station (mobile station 11) is currently acquiring the transmission right from the individual number of “1”, an error of the individual access transmission right acquisition request signal while the other mobile station is acquiring the transmission right is obtained. Transmission can be avoided.

Further, since the caller can be specified by the individual number displayed on the display unit, the caller can be specified without fail even when the call quality is low.

[0052]

As described above, the mobile station in the MCA system of the present invention displays information indicating that it is a group communication and an individual number of its own station on the display section of the mobile station that has acquired the transmission right. The information indicating the group communication and the individual number of the mobile station that has acquired the transmission right are displayed on the display section of the other plurality of mobile stations. Mobile station is easy to identify the caller, so the caller does not have to notify the information that can identify the caller such as his / her name by voice at the beginning of the call, which is limited. Talk time can be used as effectively as possible.

Further, a plurality of mobile stations other than the mobile station that has acquired the transmission right can determine which one is the current one from the information indicating the group call displayed on the display unit and the individual number of the mobile station that has acquired the transmission right. Since it is possible to recognize whether the mobile station is acquiring the transmission right, it is possible to avoid erroneous transmission of the individual access transmission right acquisition request signal.

Further, since the caller can be specified by the individual number displayed on the display unit, the caller can be specified reliably even when the call quality is low.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a system configuration diagram showing an example of an MCA system.

FIG. 3 is a sequence diagram of various control information in the MCA system.

FIG. 4 is a diagram showing a configuration of a user transmission right control message signal.

FIG. 5 is a diagram showing a configuration of a common access control message signal.

FIG. 6 is a diagram showing a configuration of a user transmission control message signal.

FIGS. 7A and 7B are configuration diagrams of a mobile station identification signal, in which FIG. 7A shows a signal format, and FIG. 7B shows assignment of an identifier and an individual number.

FIG. 8 is a flowchart for explaining a receiving operation.

FIG. 9 is a main block diagram of a mobile station in a conventional MCA system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 transmission / reception unit 20 signal creation unit 21 transmission right acquisition / release request signal generation unit 22 individual number reading unit 30 signal analysis unit 31 individual number extraction unit 32 signal type identification unit 33 buffer memory unit 34 display data generation unit 40 comparison unit 41 individual Number collating unit 42 Individual number reading unit 50 Individual number storing unit 60 Display unit 70 Microphone 300 Signal analyzing unit 310 Individual number extracting unit 400 Comparing unit 410 Individual number collating unit 420 Individual number reading unit 430 LED driving unit 600 LED

Claims (4)

(57) [Claims] 1. When a relay station and a plurality of mobile stations form a group and perform group communication, when the plurality of mobile stations have not acquired a transmission right, the relay station is in a non-communication state. A common access control message signal including a user access permission signal indicating that the mobile terminal is in a call state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. When transmitting a user transmission right control message signal including the pre-assigned own station's individual number to the relay station, and receiving the user transmission right control message, the relay station identifies the transmission right acquisition request signal. The common access control message signal including an individual access permission signal for granting a transmission right and an individual number of the mobile station that transmitted the transmission right acquisition request signal; A user transmission control message signal including a user access permission signal for permitting release of a transmission right when a transmission right release request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal is included in a group. In the mobile station of the MCA system transmitting to the mobile station, when the common access control message signal is received and the user access permission signal is identified, all the mobile stations constituting the group are in a no-communication state. A method for displaying an individual number of a mobile station in an MCA system, wherein the method displays specific information indicating that the mobile station has a specific number. 2. When a relay station and a plurality of mobile stations form a group and perform group communication, when the plurality of mobile stations have not acquired a transmission right, the relay station is in a non-communication state. A common access control message signal including a user access permission signal indicating that the mobile terminal is in a call state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. When transmitting a user transmission right control message signal including the pre-assigned own station's individual number to the relay station, and receiving the user transmission right control message, the relay station identifies the transmission right acquisition request signal. The common access control message signal including an individual access permission signal for granting a transmission right and an individual number of the mobile station that transmitted the transmission right acquisition request signal; A user transmission control message signal including a user access permission signal for permitting release of a transmission right when a transmission right release request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal is included in a group. In the mobile station of the MCA system transmitting to the mobile station, the mobile station that has received the common access control message signal and transmitted the transmission right acquisition request signal when the individual access permission signal is identified, Clear display information,
All the mobile stations other than the mobile station that has transmitted the transmission right acquisition request signal display the individual number of the mobile station that has transmitted the transmission right acquisition request signal on the display unit together with specific information indicating that the communication is a group communication. A method for displaying an individual number of a mobile station in an MCA system. 3. When a relay station and a plurality of mobile stations form a group and perform group communication, the relay station is in a non-communication state where none of the plurality of mobile stations has acquired a transmission right. A common access control message signal including a user access permission signal indicating that the mobile terminal is in a call state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. When transmitting a user transmission right control message signal including the pre-assigned own station's individual number to the relay station, and receiving the user transmission right control message, the relay station identifies the transmission right acquisition request signal. The common access control message signal including an individual access permission signal for granting a transmission right and an individual number of the mobile station that transmitted the transmission right acquisition request signal; A user transmission control message signal including a user access permission signal for permitting release of a transmission right when a transmission right release request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal is included in a group. In the mobile station of the MCA system transmitting to the mobile station, the mobile station that has received the user transmission control message signal and transmitted the transmission right release request signal when identifying the transmission right release request signal is a display unit. The mobile station in the MCA system, wherein the mobile station in the MCA system displays the specific information indicating that there is no call to all the mobile stations including the mobile station that has transmitted the transmission right release request signal. How to display individual numbers. 4. When a relay station and a plurality of mobile stations form a group and perform group communication, when the plurality of mobile stations do not acquire a transmission right, the relay station is in a non-communication state. A common access control message signal including a user access permission signal indicating that the mobile terminal is in a call state is transmitted to all the mobile stations constituting the group, and any of the mobile stations transmits a transmission right acquisition request signal or a transmission right release request signal. When transmitting a user transmission right control message signal including the pre-assigned own station's individual number to the relay station, and receiving the user transmission right control message, the relay station identifies the transmission right acquisition request signal. The common access control message signal including an individual access permission signal for granting a transmission right and an individual number of the mobile station that transmitted the transmission right acquisition request signal; A user transmission control message signal including a user access permission signal for permitting release of a transmission right when a transmission right release request signal is identified and an individual number of a mobile station that has transmitted the transmission right release request signal is included in a group. The mobile station of the MCA system for transmitting to the mobile station, wherein the mobile station stores an individual number assigned to the mobile station in advance, and identification information indicating that the mobile phone is in a no-communication state. And a display unit that displays the individual number of the mobile station that has acquired the transmission right; and the common access control message signal or the user transmission control message signal transmitted by the relay station, and the common access control message signal or The transmission right acquisition request signal from the mobile station identification number included in the user transmission control message signal or An individual number extractor for extracting the individual number of the mobile station that has transmitted the transmission right release request signal; a buffer memory for temporarily storing the individual number extracted by the individual number extractor; and a buffer temporarily stored in the buffer memory. A display data generating unit that converts an individual number into a predetermined data format, and that the received common access control message signal or the user transmission permission message is identified from the user access permission signal to indicate that the user is in the no-communication state. The identification information is displayed on the display unit via the table data generation unit, and when the individual access permission signal is identified, the individual number extracted by the individual number extraction unit is read from the buffer memory unit, and the group communication is performed. Is displayed on the display unit via the display data generation unit together with specific information indicating that the transmission right release permission signal is transmitted. When the separate access permission signal is identified, the individual number displayed on the display unit and the specific information indicating the group communication are erased when the individual access permission signal is identified, and the specific information indicating the idle state is generated in the display data generation. A signal analysis unit comprising a signal type identification unit displayed on the display unit via a unit; an individual number reading unit for reading out the individual number of the own station from the individual number storage unit; A comparison unit comprising: a comparison unit that compares and compares the individual number with the individual number read from the individual number storage unit and outputs a comparison result to the signal type identification unit. Characteristic display method of mobile station in MCA system.