JP6375991B2 - Wireless communication system, wireless communication system control method, and mobile station - Google Patents

Description

  The present invention relates to a radio communication system, a control method for a radio communication system, and a mobile station.

  There is a wireless communication system in which a base station and a plurality of mobile stations communicate via a relay station. In this type of wireless communication system, a base station and a mobile station can communicate within a wireless area where radio waves transmitted from a relay station reach.

  Patent Document 1 describes that when a mobile station moves out of a radio area, direct wireless communication is performed between a plurality of mobile stations located outside the radio area.

JP 2001-95043 A

  A management device is connected to the base station, and the management device may manage any of information related to the mobile station, environment information around the mobile station, and information related to each user using the mobile station. Information related to the mobile station, environment information around the mobile station, and information related to the user are referred to as mobile station related information.

  When the mobile station moves out of the radio area, the mobile station that has moved out of the radio area cannot communicate with the base station via the relay station, and thus cannot transmit related information of the mobile station to the base station. . Therefore, there is a problem that the management apparatus cannot manage the related information of the mobile station that has moved out of the wireless area.

  The conventional technique described in Patent Document 1 cannot solve the above-described problems, and a new method for solving the above-described problems is required.

  In order to meet such a demand, the present invention provides a radio communication system, a radio communication system control method, and a mobile communication system that can manage related information of a mobile station even when the mobile station moves outside the radio area. The purpose is to provide a station.

The present invention includes a group Chikyoku, in a first communication mode via a relay station, and a plurality of mobile stations communicating with the base station, at least positional information of each of the plurality of mobile stations by the base station has received A management device that manages related information, wherein the first mobile station, which is one of the plurality of mobile stations, is located outside a radio area by radio waves transmitted from the relay station, The first mobile station switches from the first communication mode to the second communication mode, which is a communication method not via the relay station, when communication with the base station becomes impossible in the communication mode . 1 communication mode switching means, and the management apparatus can communicate with the base station in the first communication mode among the plurality of mobile stations when the position information of the first mobile station cannot be acquired. Mobile station Selection means for selecting a second mobile station located closest to the position indicated by the position information included in the related information that was last obtained from the first mobile station, the base station, the said second mobile station Supply means for supplying an instruction signal for instructing to acquire related information of the first mobile station, and the base station sends the first mobile station to the first mobile station in response to the instruction signal. The communication mode is switched from the communication mode to the second communication mode, and has a transmission means for transmitting a control signal for controlling to acquire related information of the first mobile station. A second communication mode switching means for switching from the first communication mode to the second communication mode in response to a control signal; and a relationship between the first mobile station in the state of the second communication mode. A request signal for requesting information is sent to the second communication mode. Transmitting means for transmitting to the first mobile station that has been switched to the first mobile station, the first mobile station responding to the request signal with the relevant information of the first mobile station in the second A transmission means for transmitting to the mobile station, wherein the second mobile station receives the related information transmitted from the first mobile station, and receives the related information from the first mobile station. Upon receipt, third communication mode switching means for switching from the second communication mode to the first communication mode, and related information received from the first mobile station in the state of the first communication mode. A wireless communication system, further comprising: a transmission unit configured to transmit to the base station, wherein the base station further includes a supply unit configured to supply related information received from the second mobile station to the management apparatus. I will provide a.

Further, the present invention includes a base Chikyoku, in a first communication mode via a relay station, and a plurality of mobile stations communicating with the base station, at least the position information of the plurality of mobile stations each said base station has received A wireless communication system comprising a management device that manages related information including a wireless area by a radio wave transmitted from the relay station by a first mobile station that is one of the plurality of mobile stations Is a communication method in which the first mobile station is not connected from the first communication mode via the relay station when it is out of service area and cannot communicate with the base station in the first communication mode. Switch to the second communication mode, and when the management device cannot obtain the related information of the first mobile station, it can communicate with the base station in the first communication mode among the plurality of mobile stations Mobile station, front Selects a second mobile station located closest to the position indicated by the position information included in the related information last obtained from the first mobile station, the mobile said management apparatus to said base station, said second An instruction signal for instructing a station to acquire related information of the first mobile station, and the base station responding to the instruction signal to the second mobile station in the first communication mode Switch to the second communication mode, and transmit a control signal for controlling to acquire the relevant information of the first mobile station, the second mobile station in response to the control signal, Switching from the first communication mode to the second communication mode, the second mobile station in the state of the second communication mode, a request signal for requesting related information of the first mobile station, The first mobile station being switched to the second communication mode; And the first mobile station transmits related information of the first mobile station to the second mobile station in response to the request signal, and the second mobile station transmits the first mobile station to the first mobile station. When the related information transmitted from the mobile station is received and the second mobile station receives the related information from the first mobile station, the second communication mode is switched to the first communication mode. The second mobile station transmits related information received from the first mobile station to the base station in the state of the first communication mode, and the base station receives the information from the second mobile station. Provided is a method for controlling a wireless communication system, wherein the received related information is supplied to the management device.

Furthermore, the present invention includes a base Chikyoku, in a first communication mode via a relay station, and a plurality of mobile stations communicating with the base station, at least the position information of the plurality of mobile stations each said base station has received in a wireless communication system comprising a management apparatus for managing the related information including, it mobile station der is any one of the plurality of mobile stations, the mobile station, one of the plurality of mobile stations The other mobile station is located outside the area of the wireless area due to the radio wave transmitted from the relay station and cannot communicate with the base station in the first communication mode. When the mode is switched to the second communication mode, which is a communication method not via a relay station, the management device is positioned closest to the position indicated by the position information included in the related information acquired last from the other mobile station. Ah A mobile station, from said base station, when the first switching from communication mode to the second communication mode, receives a control signal for controlling so as to obtain the relevant information of the other mobile station, the first a first communication mode switching means for switching from one communication mode to the second communication mode, a state of the second communication mode, a request signal for requesting additional information about the other mobile station, the first Transmitting means for transmitting to the other mobile station that has been switched to the communication mode of 2, and receiving means for receiving related information of the other mobile station transmitted by the other mobile station in response to the request signal; Once the receiving means receives the related information of the other mobile station, a second communication mode switching means for switching from said second communication mode to the first communication mode, the first communication mode state in, Serial receiving means for providing a mobile station, characterized in that it comprises a transmitting means for transmitting the related information received from the other mobile stations to the base station.

  According to the wireless communication system, the control method of the wireless communication system, and the mobile station of the present invention, the management apparatus can manage the related information of the mobile station even when the mobile station moves out of the wireless area. Become.

It is a conceptual diagram which shows the radio | wireless communications system of one Embodiment. It is a block diagram which shows the schematic structure of the base station and management apparatus which comprise some radio communication systems of one Embodiment. It is a block diagram which shows the schematic structure of the mobile station of one Embodiment. It is a sequence diagram for demonstrating operation | movement of the radio | wireless communications system of one Embodiment. 3 is a flowchart for explaining an operation of the mobile station according to the embodiment.

  Hereinafter, a wireless communication system, a wireless communication system control method, and a mobile station according to an embodiment will be described with reference to the accompanying drawings.

  In FIG. 1, a repeater 2 is connected to the relay station 1. The base station 3 is configured by a wireless terminal, and a management device 4 is connected to the base station 3. The management device 4 can be configured by a personal computer.

  A radio wave transmitted from the relay station 1 reaches a range surrounded by a wireless area 100 indicated by a one-dot chain line. Within the area of the radio area 100, there are a plurality of mobile stations constituted by the base station 3 and radio terminals.

  In FIG. 1, the mobile stations 5 b and 5 c are located within the radio area 100, and the mobile station 5 a is located outside the radio area 100. A mobile station that does not specify any of the mobile stations 5a to 5c is referred to as a mobile station 5.

  In the example shown in FIG. 1, the base station 3 and the mobile stations 5 b and 5 c located within the radio area 100 can communicate via the relay station 1. On the other hand, the base station 3 and the mobile station 5a located outside the radio area 100 cannot communicate.

  As an example, the base station 3 and the mobile station 5 located within the radio area 100 communicate with each other by a trunking method controlled by the repeater 2. The trunking method is a communication method in which the mobile station 5 is called using a control channel and then shifted to a predetermined call channel. Note that the call channel is dynamically allocated.

  The management device 4 manages related information for each of the plurality of mobile stations 5. The management device 4 may manage the related information of the base station 3 together.

  The related information of the mobile station 5 is, for example, position information of the mobile station 5. The related information of the mobile station 5 may be information such as remaining battery information and usage time information regarding the mobile station 5 (that is, the wireless terminal) itself in addition to the position information of the mobile station 5.

  The related information of the mobile station 5 may be environmental information such as temperature, humidity, atmospheric pressure, and radiation dose around the mobile station 5 in addition to the position information of the mobile station 5. In this case, a sensor for measuring temperature, humidity, atmospheric pressure, radiation dose, etc. may be connected to the mobile station 5.

  The related information of the mobile station 5 may be biological information such as a heart rate, a pulse rate, and a body temperature as information on each user using the mobile station 5 in addition to the position information of the mobile station 5. In this case, a sensor for measuring a heart rate, a pulse rate, a body temperature, or the like may be attached to the user, and biological information measured by the sensor may be supplied to the mobile station 5.

  How the management device 4 acquires and manages the related information of the mobile station 5 will be described later.

  In FIG. 1, the triangular mark indicates the locus of the position of the mobile station 5. Assume that the mobile station 5 a moves from the position Pa <b> 1 to the position Pa <b> 2, from the position Pa <b> 2 to the position Pa <b> 3, and to the position Pa <b> 4 that is outside the area of the wireless area 100 within the wireless area 100.

  It is assumed that the mobile station 5b moves from the position Pb1 to the position Pb2, from the position Pb2 to the position Pb3, and from the position Pb3 to the position Pb4 within the radio area 100. It is assumed that the mobile station 5c moves from the position Pc1 to the position Pc2, from the position Pc2 to the position Pc3, and from the position Pc3 to the position Pc4 within the radio area 100.

  Here, the mobile station 5 is within the range of the radio area 100 and out of the range. However, even if the mobile station 5 is located within the range of the wireless area 100, if the user moves underground or moves to a place where radio waves are difficult to reach due to a building, the mobile station 5 may be out of service area.

  Out of service area of radio area 100 is a state in which mobile station 5 cannot receive radio waves or cannot demodulate even if it can receive radio waves regardless of whether the distance from relay station 1 is within the range of radio area 100 or out of range. .

  A schematic configuration of the base station 3 and the mobile station 5 will be described with reference to FIGS. As illustrated in FIG. 2, the base station 3 includes a control unit 31, a storage unit 32, a transmission unit 33, a reception unit 34, a transmission / reception antenna 35, a position information reception unit 36, and a position information reception antenna 37. Have A management device 4 is connected to the control unit 31.

  The control unit 31 controls the transmission unit 33 to transmit an audio signal or a control signal via the transmission / reception antenna 35. The receiving unit 34 receives an audio signal input via the transmission / reception antenna 35 and supplies it to the control unit 31.

  The receiving unit 34 may receive related information of the mobile station 5 input via the transmission / reception antenna 35. The related information of the mobile station 5 is input to the storage unit 32 and temporarily stored. The control unit 31 supplies the related information of the mobile station 5 temporarily stored in the storage unit 32 to the management device 4. The management device 4 manages related information of the mobile station 5. The storage unit 32 may be provided outside the control unit 31.

  The position information receiving unit 36 receives position information indicating the position of the base station 3 input via the position information receiving antenna 37. The position information of the base station 3 is input to the storage unit 32 and temporarily stored.

  The control unit 31 supplies the position information of the base station 3 temporarily stored in the storage unit 32 to the management device 4. The management device 4 manages the position information of the base station 3.

  As an example, the position information receiving unit 36 is a GPS signal receiving unit that receives GPS signals from a plurality of GPS satellites. The position information receiving unit 36 may calculate the position of the base station 3 based on GPS signals from a plurality of GPS satellites, or the control unit 31 may calculate the position of the base station 3.

  The location information receiving unit 36 receives the location information of the access point of the wireless LAN (Wi-Fi), and the location information receiving unit 36 or the control unit 31 calculates the location of the base station 3 based on the location information of the access point. Also good. The method for acquiring the position information of the base station 3 is not particularly limited.

  The management device 4 does not necessarily have to manage the location information of the base station 3. When the management apparatus 4 does not manage the position information of the base station 3, the position information receiving unit 36 and the position information receiving antenna 37 can be omitted.

  As shown in FIG. 3, the mobile station 5 includes a control unit 51, a storage unit 52, a transmission unit 53, a reception unit 54, a transmission / reception antenna 55, a position information reception unit 56, and a position information reception antenna 57. Have

  The control unit 51 controls the transmission unit 53 to transmit an audio signal via the transmission / reception antenna 55. The control unit 51 may control the transmission unit 53 to transmit a request signal described later. The receiving unit 54 receives an audio signal input via the transmission / reception antenna 55 and supplies it to the control unit 51.

  The position information receiving unit 56 receives position information indicating the position of the mobile station 5 input via the position information receiving antenna 57. The location information of the mobile station 5 is input to the storage unit 52 and temporarily stored. The position information receiving unit 56 is the same as the position information receiving unit 36.

  The control unit 51 controls to transmit the position information of the mobile station 5 temporarily stored in the storage unit 52 to the base station 3 via the transmission / reception antenna 55 and the relay station 1. In addition to the position information of the mobile station 5, the control unit 51 may control to transmit information about the mobile station 5 itself, environment information measured by a sensor (not shown), and biological information to the base station 3.

  In the base station 3 shown in FIG. 2 and the mobile station 5 shown in FIG. 3, description of a microphone, a speaker, a PTT switch, and the like is omitted.

  Next, a method in which the management apparatus 4 acquires related information of the mobile station 5a located at the position Pa4 that is outside the radio area 100 will be described using the sequence diagram shown in FIG. Here, for simplification, the related information is assumed to be position information.

  The base station 3 is configured to acquire its own location information and supply it to the management device 4 at preset time intervals. The mobile station 5 is configured to acquire its own location information and transmit it to the base station 3 every preset time.

  The base station 3 and the plurality of mobile stations 5 communicate in a relay communication mode (first communication mode) via the relay station 1. The relay communication mode is, for example, communication using a trunking method.

  In FIG. 4, the base station 3 acquires position information in step S1, and supplies the position information to the management apparatus 4 in step S2. The mobile station 5a acquires position information in step S3, and transmits the position information to the base station 3 in step S4. The base station 3 supplies the management apparatus 4 with the location information of the mobile station 5a received in step S5.

  The mobile station 5b acquires position information in step S6, and transmits the position information to the base station 3 in step S7. The base station 3 supplies the management apparatus 4 with the position information of the mobile station 5b received in step S8. The mobile station 5c acquires position information in step S9, and transmits the position information to the base station 3 in step S10. The base station 3 supplies the management apparatus 4 with the position information of the mobile station 5c received in step S11.

  The order of steps S1, S3, S6 and S9 is merely an example, and is not limited to this order. When the base station 3 and the mobile station 5 are instructed to acquire the position information by the management device 4 instead of acquiring the position information of the base station 3 and the mobile station 5 every preset time, the position information You may comprise so that it may acquire.

  If the mobile station 5a is located at a position Pa4 that is outside the range of the wireless area 100, the mobile station 5a cannot communicate with the base station 3 via the relay station 1. 2 communication mode).

  The direct communication mode is a mode in which a plurality of mobile stations 5 communicate with each other without passing through the relay station 1. The frequency of the radio wave used in the direct communication mode is different from the frequency of the radio wave used in the relay communication mode. In the direct communication mode, a fixed call channel is used.

  The direct communication mode is an example of a second communication mode that does not pass through the relay station 1. Communication via Bluetooth (registered trademark), wireless LAN (Wi-Fi), or mobile phone line can also be set to the second communication mode.

  Although not shown, after step S11, the base station 3 and the mobile stations 5b and 5c located within the radio area 100 acquire position information and supply the respective position information to the management device 4. Is executed.

  Since the management apparatus 4 cannot acquire the position information of the mobile station 5a even after a preset time has elapsed, a request signal for requesting the position information of the mobile station 5a is sent to the base station 3 in step S13. Supply. Upon receiving the request signal, the base station 3 transmits a control signal for requesting the mobile station 5a to transmit position information in step S14.

  However, since the mobile station 5a is located outside the radio area 100, it cannot receive a control signal. If the mobile station 5a receives the control signal, the position information is transmitted as a response to the request for transmitting the position information in step S15, but there is no response in step S15.

  In step S16, the base station 3 supplies the management device 4 with an identification signal indicating that there is no response from the mobile station 5a.

  In step S17, the management device 4 determines that communication with the mobile station 5a is not possible. Subsequently, in step S18, the management device 4 selects the mobile station 5 that is closest to the mobile station 5a.

  Specifically, the management device refers to the position information (position Pa3) acquired last from the mobile station 5a, and the current position of the mobile station 5a is largely separated from the position Pa3 indicated by the position information acquired last. On the basis of the absence, the mobile station 5 at the position closest to the position Pa3 is selected. In the example of FIG. 1, the mobile station 5b is closest to the mobile station 5a.

  Therefore, in step S19, the management device 4 supplies an instruction signal that instructs the base station 3 to acquire the position information of the mobile station 5a to the mobile station 5b. In response to the instruction signal, the base station 3 transmits a control signal for controlling the mobile station 5b to acquire the positional information of the mobile station 5a by switching from the relay communication mode to the direct communication mode in step S20. .

  In step S21, the mobile station 5b switches to the direct communication mode. When the mobile station 5a has already shifted to the direct communication mode in step S12 and the mobile station 5b shifts to the direct communication mode in step S21, as shown in FIG. 1, the mobile stations 5a and 5b are relayed. Direct communication is possible without going through the station 1.

  The radio wave transmitted from the mobile station 5b reaches the range surrounded by the wireless area 50 indicated by the alternate long and short dash line. The wireless area 50 is smaller than the wireless area 100. Note that the size of each of the wireless areas 50 and 100 does not represent the actual size of the wireless area.

  If the mobile station 5a is located within the wireless area 50 where direct communication is possible, the mobile station 5b can directly communicate with the mobile station 5a.

  In step S22, the mobile station 5b transmits a request signal for requesting the location information of the mobile station 5a to the mobile station 5a. The mobile station 5a receives the request signal and transmits the position information to the mobile station 5b in step S23.

  When receiving the position information from the mobile station 5a, the mobile station 5b switches from the direct communication mode to the relay communication mode in step S24. The mobile station 5b transmits the position information of the mobile station 5a to the base station 3 in step S25. In step S26, the base station 3 supplies the location information of the mobile station 5a to the management device 4.

  As described above, the management apparatus 4 can acquire and manage the position information of the mobile station 5a located outside the radio area 100.

  When the position information of the mobile station 5 and the information related to the mobile station 5 itself are used as related information, the management device 4 can determine whether the mobile station 5 is in an out-of-service state even if a certain mobile station 5 is out-of-service. It is possible to manage battery remaining amount information, usage time information, and the like.

  When the position information and the environment information of the mobile station 5 are used as related information, the management device 4 can determine the temperature around the mobile station 5 that has become out of service, even if a certain mobile station 5 is out of service. It becomes possible to manage humidity, atmospheric pressure, radiation dose, and the like.

  When the positional information and biological information of the mobile station 5 are used as related information, the management device 4 uses the mobile station 5 that is out of service area even if a certain mobile station 5 is out of service area. It is possible to manage the heart rate, pulse rate, body temperature, etc. of the user who is present.

  The operation of the mobile station 5b will be described in more detail using the flowchart shown in FIG. In FIG. 5, in step S501, the mobile station 5b switches the mobile station 5b to the direct communication mode, and receives a request signal for acquiring the position information of the mobile station 5a. In step S502, the mobile station 5b switches to the direct communication mode. Step S502 corresponds to step S21 in FIG.

  In step S503, the mobile station 5b determines whether or not the remaining number of retries is zero. The initial retry number may be set as appropriate, for example, “5”. If the remaining number of retries is not 0 (NO), the mobile station 5b requests the mobile station 5a to transmit position information in step S504. Step S504 corresponds to step S22 in FIG.

  In step S505, the mobile station 5b determines whether position information has been received. If the mobile station 5b receives the position information (YES), the mobile station 5b switches to the relay communication mode in step S506. Step S506 corresponds to step S24 in FIG.

  In step S507, the mobile station 5b transmits position information to the base station 3 and ends the process. Step S507 corresponds to step S25 in FIG.

  On the other hand, if the mobile station 5b does not receive the position information (NO), 1 is subtracted from the remaining retry number in step S508, and the process returns to step S503. Steps S503 to S505 are repeated until the remaining number of retries becomes zero.

  If the remaining number of retries is 0 in step S503, the mobile station 5b ends the process.

  Incidentally, the control unit 51 in FIG. 3 of the mobile station 5a and step S12 in FIG. 4 function as communication mode switching means for switching from the relay communication mode to the direct communication mode.

  Step S18 in FIG. 4 is a mobile station 5 that can communicate with the base station 3 in the relay communication mode among the plurality of mobile stations 5, and is located closest to the mobile station 5a that is out of service. Functions as a selection means for selecting.

  Step S19 in FIG. 4 functions as a supply unit that supplies the base station 3 with an instruction signal that instructs the mobile station 5b to acquire the position information of the mobile station 5a.

  The control unit 31 and the transmission unit 33 in FIG. 2 of the base station 3 and step S20 in FIG. 4 switch the mobile station 5b from the relay communication mode to the direct communication mode in response to the instruction signal. It functions as a transmission means for transmitting a control signal for controlling to acquire the related information.

  3 of the mobile station 5b and step S21 in FIG. 4 or step S502 in FIG. 5 function as communication mode switching means for switching from the relay communication mode to the direct communication mode in response to the control signal.

  The control unit 51 and the transmission unit 53 in FIG. 3 of the mobile station 5b and step S22 in FIG. 4 are switched to the direct communication mode for request signals for requesting relevant information of the mobile station 5a in the direct communication mode. It functions as a transmission means for transmitting to the mobile station 5a.

  The control unit 51 and the transmission unit 53 in FIG. 3 of the mobile station 5a and step S23 in FIG. 4 function as a transmission unit that transmits related information of the mobile station 5a to the mobile station 5b in response to the request signal.

  The receiving unit 54 of the mobile station 5b in FIG. 3 functions as a receiving unit that receives related information transmitted from the mobile station 5a. 3 of the mobile station 5b and step S24 in FIG. 4 or step S506 in FIG. 5 are communication mode switching means for switching from the direct communication mode to the relay communication mode when the related information is received from the mobile station 5a. Function.

  The transmission unit 53 in FIG. 3 of the mobile station 5b and step S25 in FIG. 4 or step S507 in FIG. 5 are transmission means for transmitting the related information received from the mobile station 5a to the base station 3 in the relay communication mode. Function.

  The control unit 31 in FIG. 2 of the base station 3 and step S26 in FIG. 4 function as a supply unit that supplies related information received from the mobile station 5b to the management apparatus 4.

  The wireless communication system of the present embodiment can be used, for example, when a firefighter carries out a fire extinguishing activity while possessing the mobile station 5. If the management device 4 is configured to manage the biometric information of each firefighter, the fire fighting activity can be performed while managing the safety of the firefighter.

  According to the wireless communication system of the present embodiment, even if the mobile station 5 is temporarily out of service, it is possible to acquire related information of the mobile station 5, which greatly contributes to safety management of firefighters. It becomes possible to do.

  The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention. The wireless communication system may be configured by hardware, or may be partially configured by software (computer program). Use of hardware and software is optional.

DESCRIPTION OF SYMBOLS 1 Relay station 2 Repeater 3 Base station 4 Management apparatus 5a, 5b, 5c Mobile station 50, 100 Wireless area

Claims (6)

A base station,
A plurality of mobile stations communicating with the base station in a first communication mode via a relay station;
A management device for managing related information including at least position information of each of the plurality of mobile stations received by the base station;
With
A state in which the first mobile station, which is one of the plurality of mobile stations, is located outside the wireless area by the radio wave transmitted from the relay station and cannot communicate with the base station in the first communication mode Then, the first mobile station has a first communication mode switching means for switching from the first communication mode to a second communication mode that is a communication method not via the relay station,
The management device
When the location information of the first mobile station cannot be acquired, the mobile station is a mobile station that can communicate with the base station in the first communication mode, and finally, from the first mobile station. Selecting means for selecting the second mobile station located closest to the position indicated by the position information included in the acquired related information ;
Supply means for supplying to the base station an instruction signal that instructs the second mobile station to acquire relevant information of the first mobile station;
Have
In response to the instruction signal, the base station switches the second mobile station from the first communication mode to the second communication mode, and acquires related information of the first mobile station Transmission means for transmitting a control signal for controlling
The second mobile station is
Second communication mode switching means for switching from the first communication mode to the second communication mode in response to the control signal;
Transmitting means for transmitting a request signal for requesting related information of the first mobile station to the first mobile station switched to the second communication mode in the state of the second communication mode;
Have
The first mobile station further includes transmission means for transmitting related information of the first mobile station to the second mobile station in response to the request signal,
The second mobile station is
Receiving means for receiving related information transmitted from the first mobile station;
Third communication mode switching means for switching from the second communication mode to the first communication mode upon receipt of related information from the first mobile station;
Transmitting means for transmitting related information received from the first mobile station to the base station in the state of the first communication mode;
Further comprising
The base station further comprises supply means for supplying related information received from the second mobile station to the management apparatus. The selection unit of the management device selects the second mobile station at a position closest to the position indicated by the position information included in the last related information before the first mobile station is out of range. The wireless communication system according to claim 1. The first communication mode is a communication mode using a trunking method,
The wireless communication system according to claim 1 or 2, wherein the second communication mode is a direct communication mode in which the first mobile station and the second mobile station directly communicate with each other. Managing related information including at least position information of each of the plurality of mobile stations communicating with the base station and the plurality of mobile stations received by the base station in the first communication mode via the base station and the relay station A control method of a wireless communication system comprising a management device,
A state in which the first mobile station, which is one of the plurality of mobile stations, is located outside the wireless area by the radio wave transmitted from the relay station and cannot communicate with the base station in the first communication mode Then, the first mobile station is switched from the first communication mode to the second communication mode which is a communication method not via the relay station,
The management apparatus is a mobile station capable of communicating with the base station in the first communication mode among the plurality of mobile stations when the management apparatus cannot obtain the related information of the first mobile station, Select the second mobile station that is closest to the position indicated by the position information included in the related information last acquired from the mobile station,
The management apparatus supplies an instruction signal to instruct the base station to acquire information related to the first mobile station to the second mobile station;
In response to the instruction signal, the base station switches to the second mobile station from the first communication mode to the second communication mode, and acquires related information of the first mobile station Send a control signal to control
In response to the control signal, the second mobile station switches from the first communication mode to the second communication mode,
The first mobile in which the second mobile station is switched to the second communication mode with a request signal for requesting related information of the first mobile station in the state of the second communication mode. To the station,
In response to the request signal, the first mobile station transmits related information of the first mobile station to the second mobile station,
The second mobile station receives related information transmitted from the first mobile station,
When the second mobile station receives related information from the first mobile station, the second mobile station switches from the second communication mode to the first communication mode,
The second mobile station transmits the related information received from the first mobile station to the base station in the state of the first communication mode;
The wireless communication system control method, wherein the base station supplies related information received from the second mobile station to the management device. When the management device selects the second mobile station that is closest to the first mobile station, the management apparatus includes location information included in the last related information before the first mobile station is out of service area. The method of controlling a wireless communication system according to claim 4, wherein the second mobile station at a position closest to the position indicated by is selected. Managing related information including at least position information of each of the plurality of mobile stations communicating with the base station and the plurality of mobile stations received by the base station in the first communication mode via the base station and the relay station in a wireless communication system comprising a management device, it mobile station der is any one of the plurality of mobile stations,
The mobile station is located in the first communication mode when the other mobile station, which is one of the plurality of mobile stations, is located outside the radio area by the radio wave transmitted from the relay station. When the management apparatus is switched from the first communication mode to the second communication mode, which is a communication method that does not pass through the relay station, the management device last obtained from the other mobile station A mobile station that is closest to the position indicated by the position information included in the information;
When a control signal is received from the base station to switch from the first communication mode to the second communication mode and control to acquire related information of the other mobile station, the base station starts from the first communication mode. a first communication mode switching means for switching to the second communication mode,
Transmitting means for transmitting a request signal for requesting related information of the other mobile station to the other mobile station that has been switched to the second communication mode in the state of the second communication mode;
Receiving means for receiving relevant information of the other mobile station transmitted by the other mobile station in response to the request signal;
A second communication mode switching means for switching from the second communication mode to the first communication mode when the receiving means receives the related information of the other mobile station ;
In the state of the first communication mode, and transmitting means for transmitting the related information received by the receiving unit from the other mobile stations to the base station,
A mobile station comprising:

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