JP6253185B2 - Wireless communication system - Google Patents

Description

  The present invention relates to a wireless communication system, and more particularly to a wireless control station.

  For example, a prefectural / municipal digital mobile communication system (for example, see Non-Patent Document 1) is a control station facility, a base station facility, a fixed station facility, and a mobile station facility based on a local government (prefecture or municipality) The communication is performed between the control station and the mobile station (or fixed station) or between the mobile station (or fixed station) and the mobile station (or fixed station) via the base station or directly.

FIG. 1 shows an example of such a digital radio system.
The digital wireless system of this example includes a control station device 101 and a plurality of mobile station devices 121-1 to 121-5 and 122-1 to 122-3. Examples of the mobile station apparatus include in-vehicle mobile station apparatuses 121-1 to 121-5 and portable mobile station apparatuses 122-1 to 122-3.
The control station apparatus 101 includes a control apparatus 112, a radio apparatus 113, a transmission antenna 115, and a reception antenna 114 that constitute the functions of the base station apparatus, and also includes a control table and extension telephones 111-1 to 111-n ( n is an integer of 1 or more.
The wireless device 113 has a communication range of the base zone 116 and performs wireless communication with the mobile station devices 121-1 to 121-5 and 122-1 to 122-3.

In the digital wireless system of this example, the frequency band f1 is used in downlink communication from the base station apparatus to the mobile station apparatuses 121-1 to 121-5 and 122-1 to 122-3, and the mobile station apparatus 121-1. ~ 121-5, 122-1 to 122-3, the uplink communication from the base station apparatus uses the frequency band f2, and the mobile station apparatuses 121-1 to 121-5 and 122-1 to 122-3 In the direct communication between mobile stations, the frequency band f3 is used.
Here, in general, there is one control channel assigned to each base station apparatus, and there is only one control channel for direct communication in the whole country, and communication areas do not overlap. Communication is possible. However, the present invention is not limited to this, and various other configurations may be used.
In the digital wireless system of this example, the basic communication methods are individual communication and group communication.
In the individual communication, in a communication using a base station between a control station and a mobile station or between mobile stations, a duplex call (one-to-one communication) is possible by a selective call method using an individual number.
Group communication enables communication (one-to-n communication) targeting a group composed of a plurality of mobile stations from a control station or a mobile station. The group number is used to specify the target station, and only the standby station is the target. Since group communication is 1-to-n communication, it is a press-talk type communication.

  In addition, as another prior art, the relay station device periodically transmits a switching signal for the mobile station device to switch to the channel for simultaneous communication, and receives the simultaneous communication by performing a follow-up notification. There is a wireless communication system that can reduce the number of mobile station devices that cannot be used (see, for example, Patent Document 1).

  Furthermore, as another prior art, there is a wireless communication system in which when a forced disconnection by control communication is performed, a terminal station that is not subject to control communication can know that it is a forced disconnection by control communication (for example, , See Patent Document 2).

JP2013-55710A JP 2012-151564 A

Prefectural / municipal digital mobile communication systems, ARIB STD-T79, Japan Radio Industry Association

In the prior art, for example, basic communication methods are individual communication and group communication.
In the group communication, communication (call) is disconnected (released) when the setting value of “communication time limit” or “no call time limit” is exceeded in addition to the disconnection operation of the user.
The communication time is the time from the start of communication (call establishment), and the no-call time is the time during which no press talk is performed in group communication.
Since priority calls (broadcast communication, control communication, broadcast communication) are important communications, the communication time limit / no call time limit is often set to be long or unlimited. Also, the authority to disconnect is limited to the “control station” or “wireless control station” that has transmitted or can transmit wired communication.

The simultaneous communication described above enables simultaneous communication (one-to-n communication) for a group composed of a plurality of mobile stations from a control station or a wireless control station. The group number is used to specify the target station, and the target station in communication is automatically forcibly disconnected and drawn into communication. In simultaneous communication, it is only one way of downlink from the base station, and the mobile station cannot transmit. This communication can be confirmed from the control station or the radio control station to the target station.
The control communication described above is individual communication or group communication from the control station or the radio control station, and the target station during a call automatically forcibly disconnects and can be pulled into the communication. Since individual communication is duplex communication and group communication is 1-to-n communication, it is a press-talk type communication.
The above-described broadcast communication enables broadcast communication (one-to-n communication) from a control station or a wireless control station to a plurality of counterpart stations. The group number is used to specify the target station, and only the standby station is the target. In broadcast communication, only one-way transmission from the base station is possible, and transmission from the mobile station becomes impossible.

Since the above-mentioned “wireless control station” is connected to the wireless line, it may be disconnected from the communication (disconnected from the communication channel) due to the deterioration of the wireless line quality. In this case, since there is no “wireless control station” capable of disconnecting the priority communication, the priority communication continues and troubles in system operation occur.
As a problem in system operation, a mobile station that is performing priority communication cannot leave the communication by itself. In the case of simultaneous communication or broadcast communication, a press talk from a mobile station is not possible and the situation cannot be communicated. In the case of simultaneous communication, the control group forcibly causes the target mobile station to participate in the group communication. For example, even if the control group leaves the communication (power activation or the like later), a new transmission is rejected.

  The wireless communication system of the present invention is a wireless communication system having a wireless control station, a base station, a line control device, and a terminal station, wherein the wireless control station communicates during priority communication between the base station and the line control device. When the terminal station leaves, the terminal controller disconnects the priority communication by a disconnection signal transmitted from the base station and enters a standby state.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the line control device compares the priority request and the call request with the call request sender and the priority caller transmitted from the radio control station. In the case where the callers match, the disconnection signal for the priority communication is transmitted to the terminal station.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the line control device compares the priority request and the call request with the call request sender and the priority caller transmitted from the radio control station. In the case where the callers match, the disconnection signal for the priority communication is transmitted to the terminal station.

  The wireless communication system according to the present invention is the above-described wireless communication system, wherein the line control device compares the priority communication and the call response with the caller response sender and the priority communication sender transmitted from the radio control station. In the case where the callers match, the disconnection signal for the priority communication is transmitted to the terminal station.

  The radio communication system of the present invention is a radio communication system having a radio control station, a control station, and a line control device. When the line control device receives a priority communication call, does the caller number be the radio control station? If it is the caller number of the radio control station, the radio control station communication time timer and no-call time timer are started, and if it is the control station caller number, the radio control station A communication time timer and a no-call time timer are started.

  The wireless communication system of the present invention is a wireless communication system having a wireless control station, a base station, a line control device, and a terminal station, wherein the wireless control station communicates during priority communication between the base station and the line control device. When leaving, the base station sends a follow-up information group communication call to the radio control station, and the radio control station compares the local station number with the caller ID of the priority communication. The terminal station transmits a communication disconnection request, and the terminal station disconnects the priority communication by a disconnection signal transmitted from the base station via the base station, and enters a standby state.

  ADVANTAGE OF THE INVENTION According to this invention, when a radio control station leaves | separates from the priority communication transmitted from the radio control station, the recovery time of a radio communication system can be shortened.

It is a figure which shows an example of a digital radio system. It is a figure which shows the structural example of a radio control station. It is a block diagram for demonstrating the structural example of a radio control station. It is a flowchart for demonstrating operation | movement of the line control apparatus which is one Example of this invention. It is a sequence diagram for demonstrating release by the line control apparatus which is one Example of this invention by receiving a location registration request. It is a sequence diagram for demonstrating release by the line control apparatus which is one Example of this invention by call request reception. It is a sequence diagram for demonstrating release by the line control apparatus which is one Example of this invention by receiving an incoming call response. It is a sequence diagram for demonstrating release by the radio | wireless control station which is one Example of this invention by the sender coincidence of follow-up information.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an example of a digital radio system for explaining an embodiment of the present invention.
Since the configuration of FIG. 1 has been described above, a description thereof will be omitted.
In FIG. 1, for example, basic communication methods are individual communication and group communication.
In the individual communication, in a communication using a base station between a control station and a mobile station or between mobile stations, a duplex call (one-to-one communication) is possible by a selective call method using an individual number.
Group communication enables communication (one-to-n communication) targeting a group composed of a plurality of mobile stations from a control station or a mobile station. The group number is used to specify the target station, and only the standby station is the target. Since group communication is 1-to-n communication, it is a press-talk type communication.

Next, a configuration example of the radio control station will be described with reference to FIG.
FIG. 2A shows a configuration example 1 of the radio control station.
In the jurisdiction area 211 where the prefectural control station 210 can communicate, there are prefectural base stations 220 and 230, prefectural mobile stations 222 and 232, and prefectural terminal stations 223 and 233.
The prefectural base station 220 communicates with the prefectural mobile station 222 and the prefectural terminal station 223. The prefectural base station 230 communicates with the prefectural mobile station 232 and the prefectural terminal station 233.

Within the jurisdiction area 221 where the prefectural base station 220 can communicate, there are a prefectural mobile station 222, a prefectural terminal station 223, a city mobile station 224, a municipal radio control station 225, and a city terminal station 226.
Within the jurisdiction area 231 of the prefectural base station 230, there are a prefectural mobile station 232, a prefectural terminal station 233, a city mobile station 234, a municipal radio control station 235, and a city terminal station 236.
The municipal radio system shares the prefecture radio system, and the municipal radio control stations 225 and 235 individually control the radio system.

The radio control station is installed when it is difficult to connect the control station and the base station through the entrance line. The radio control station is a radio station that does not move, for example, and has a function of both the control station and the mobile station.
Moreover, in the integrated system of prefectures, it is installed in a municipality or an institution of a prefecture, and performs main communication and communication control in the relevant jurisdiction area. Communication with the mobile station is performed via a relay station or a base station. However, when the relay station fails, it is possible to communicate with the mobile station using the direct communication function between the mobile stations.

In FIG. 2A, in the jurisdiction area 224 where the municipal radio control station 225 can communicate, there are a prefectural mobile station 222, a prefectural terminal station 223, a city mobile station 224, and a city terminal station 226.
Within the jurisdiction area 234 in which the municipal radio control station 235 can communicate, there are a prefectural mobile station 232, a prefectural terminal station 233, a municipal mobile station 234, and a city terminal station 236.

FIG. 2B is a configuration example 2 of the radio control station.
The prefectural control station 250 includes a line control device 252, a PBX (Private Branch eXchange) 251, a control table 253, and a link wireless device 257.
The control table 253 includes a FAX, a data transmission device, a server, and the like, and controls the line control device 252.

The line control device 252 communicates with the link wireless device 257 and the base stations 275 and 291 and communicates with an external network device via the network 254.
The line control device 252 makes a call with the extension telephones 255 and 256 via the PBX 251 and is connected to a PSTN (Public Switched Telephone Networks).
The link wireless device 257 communicates with the link wireless device 258 in the base zone 284.

  The control zone 260 is, for example, a range that can be controlled by the radio control station.

The base zone 284 is a wireless communication range of the base station (wireless device, control device) 285.
The base station (wireless device, control device) 285 and the link wireless device 258 are connected by wire.
The base station (wireless device, control device) 285 is also connected to the call monitor device 283.

The control table 282, the communication device (wireless device, control device) 281 and the like are wireless control tables.
The base station (wireless device, control device) 285 and the communication device (wireless device, control device) 281 perform wireless communication.

  The wireless control station 280 includes a control table 282, a communication device (wireless device, control device) 281 and a base station (wireless device, control device) 285.

  The base zone 290 is a wireless communication range of the base station (wireless device, control device) 291.

The base zone 274 is a wireless communication range of the base station (wireless device, control device) 275.
The base station (wireless device, control device) 275 is also connected to the call monitor device 273.

The control table 272, the communication device (wireless device, control device) 271 and the like are wireless control tables.
The base station (wireless device, control device) 275 and the communication device (wireless device, control device) 271 perform wireless communication.

  The wireless control station 270 includes a control table 272, a communication device (wireless device, control device) 271 and a base station (wireless device, control device) 275.

Next, the radio control station will be described with reference to FIG.
FIG. 3 is a block diagram for explaining a configuration example of the radio control station.
The radio control station 300 includes a radio unit 310 that performs radio communication, a user interface unit 330, and a control unit 320 that controls the radio unit and the user interface unit.

The wireless unit 310 includes a transmission device 312, a reception device 313, a duplexer 311, and an antenna 314.
The control unit 320 includes a control device 321 and a storage device 322.
The user interface unit 330 includes a display unit 331, an operation unit 332, and a transmission / reception unit 333.

  The control station and the wireless control station can make a priority call for simultaneous communication, control communication, and broadcast communication.

  Next, the operation of the line control apparatus according to an embodiment of the present invention will be described with reference to FIGS.

(Release due to communication time limit / no call time limit for "wireless control station")
As the operation of the line control device, the communication time / no call time limit of the priority communication sent from the “wireless control station” and the communication sent from the “control station” are distinguished in the line control device, and the “wireless control station” The communication from “” shortens the communication time / no call time, and releases the priority communication when the “wireless control station” leaves the communication.

FIG. 4 is a flowchart for explaining the operation of the line control apparatus according to the embodiment of the present invention.
The line control device 252 receives the priority communication transmission from the wireless control station 300 in step S1.
In step S2, it is determined whether the caller number is a radio control station. If it is a radio control station (YES), the process proceeds to step S3. If it is not a radio control station (NO, in the case of a control station), step S2 is performed. The process proceeds to S5.

In step S3, the operation of the communication control timer of the radio control station is started, and the process proceeds to step S4.
In step S4, the operation of the no-call time timer of the radio control station is started, and the process proceeds to the next process.

In step S5, the operation of the communication station timer of the control station is started, and the process proceeds to step S6.
In step S6, the operation of the no-call time timer of the control station is started and the process proceeds to the next process.

(Release by receiving "Location registration request")
As a main operation, the “wireless control station” that has left the communication due to the deterioration of the wireless channel quality searches the control channel of the base station and transmits a “location registration request” when it is determined that the base station is usable. At this time, if the sender of the priority communication and the sender of the “location registration request” are the same, the line control device determines that the “wireless control station” has left the priority communication and releases the priority communication.
The location registration is a function for the line control device to grasp which base station the mobile station belongs to.

FIG. 5 is a sequence diagram for explaining release by reception of a location registration request by the line control apparatus according to the embodiment of the present invention.
The communication channel 5022 of the base station 502 is in priority communication 505 with the line control device 503, and is in priority communication 504 with the radio control station 501.

When the wireless control station 501 leaves the communication due to the deterioration of the wireless channel quality (506), the wireless control station 501 searches the control channel 5021 of the base station 502 and transmits a “location registration request” (507) when it is determined that the base station is usable.
The control channel 5021 of the base station 502 transmits a location registration request (508) to the line control device 503.

  The line control device 503 compares the priority communication with the location registration request originator (509), and if it does not match, continues the priority communication (510), and if it matches, gives priority to the communication channel 5022 of the base station 502. A communication disconnection (511) is transmitted.

The communication channel 5022 of the base station 502 transmits the priority communication disconnection (512) to the mobile station.
The mobile station enters a standby state from the priority communication (513).

(Release by receiving “call request”)
As a main operation, when a “wireless control station” that has left communication due to a deterioration in wireless channel quality sends a “call request” using the control channel of the base station, the line control device When the sender and the caller of the “call request” are the same, it is determined that the “wireless control station” has left the priority communication, and the priority communication is released.

FIG. 6 is a sequence diagram for explaining release by receiving a call request by the line control apparatus according to the embodiment of the present invention.
The communication channel 5022 of the base station 502 is in priority communication 505 with the line control device 503, and is in priority communication 504 with the radio control station 501.

When the wireless control station 501 is disconnected (506) due to the deterioration of the wireless line quality, the wireless control station 501 transmits a call request (607) to the control channel 5021 of the base station 502.
The control channel 5021 of the base station 502 transmits a call request (608) to the line control device 503.

  The line control device 503 compares the priority communication with the call request originator (609), and continues the priority communication if there is a mismatch (610). If there is a match, priority is given to the communication channel 5022 of the base station 502. A communication disconnection (611) is transmitted.

The communication channel 5022 of the base station 502 transmits the priority communication disconnection (612) to the mobile station.
The mobile station enters a standby state from the priority communication (613).

(Release by receiving "call response")
As a main operation, when receiving an “incoming call response” from the “wireless control station” in response to an “incoming call request” to the “wireless control station”, the line control device and When the senders of the “response” are the same, it is determined that the “wireless control station” has left the priority communication, and the priority communication is released.

FIG. 7 is a sequence diagram for explaining the release by the incoming call response reception by the line control apparatus according to the embodiment of the present invention.
The communication channel 5022 of the base station 502 is in priority communication 505 with the line control device 503, and is in priority communication 504 with the radio control station 501.

The wireless control station 501 leaves the communication (506) due to the deterioration of the wireless channel quality.
The line control apparatus 503 transmits an incoming call request (707) to the control channel 5021 of the base station 502.
The control channel 5021 of the base station 502 transmits an incoming call request (708) to the radio control station 501.

The radio control station 501 transmits an incoming call response (709) to the control channel 5021 of the base station 502.
The control channel 5021 of the base station 502 transmits an incoming call response (710) to the line control device 503.

  The line control device 503 compares the priority communication and the call response originator (711), and if it does not match, continues the priority communication (712). If it matches, the line control device 503 gives priority to the communication channel 5022 of the base station 502. A communication disconnection (713) is transmitted.

The communication channel 5022 of the base station 502 transmits a priority communication disconnection (714) to the mobile station.
The mobile station enters a standby state from the priority communication (715).

  Next, the operation of the radio control station according to the embodiment of the present invention will be described with reference to FIGS.

(Release by matching senders of follow-up information)
The main operation of group communication is to periodically send “follow-up information” to allow mobile stations that have been powered on after communication is established or mobile stations that have temporarily disconnected due to radio link quality degradation to participate in group communication. Yes. This “follow-up information” includes a sender number in addition to a group number. When the "wireless control station" receives "follow-up information" after leaving the communication and this caller number matches the local station number, it recognizes that priority communication has been left and sends a disconnection signal to release the priority communication. To do.

FIG. 8 is a sequence diagram for explaining the release of the follow-up information by the sender coincidence by the radio control station according to the embodiment of the present invention.
The communication channel 5022 of the base station 502 is in priority communication 505 with the line control device 503, and is in priority communication 504 with the radio control station 501.

The wireless control station 501 leaves the communication (506) due to the deterioration of the wireless channel quality.
The control channel 5021 of the base station 502 transmits follow-up information (group communication call) 814 to the radio control station 501.

The wireless control station 501 compares the sender number of the priority communication with its own station number (815). If there is no match, nothing is done. If there is a match, the wireless control station 501 requests the communication channel 5022 of the base station 502 to disconnect (816). Send.
The communication channel 5022 of the base station 502 transmits a disconnection request (817) to the line control device 503.

The line control device 503 transmits a priority communication disconnection (818) to the communication channel 5022 of the base station 502.
The communication channel 5022 of the base station 502 transmits priority communication disconnection (819) to the mobile station.
The mobile station enters a standby state during priority communication (820).

  As described above, when the radio control station leaves the priority communication transmitted from the radio control station, the recovery time of the radio communication system can be shortened.

  Although the present invention has been described in detail above, it is needless to say that the present invention is not limited to the radio communication system described here, and can be widely applied to radio communication systems other than those described above.

  101: Control station, 111-1 to 111-n: Control table, extension telephone, etc. 112: Control device, 113: Wireless device, 114: Reception antenna, 115: Transmission antenna, 116: Base zone, 121-1 to 121 -5: mobile station, 122-1 to 122-3: mobile station, 210: prefectural control station, 220, 230: prefectural base station, 222, 232: prefectural mobile station, 223, 233: prefectural terminal station, 224, 234 : City mobile station, 225, 235: Municipal radio control station, 226, 236: City terminal station, 250: Prefectural control station, 251: PBX, 252: Line control device, 253, 272, 282: Control table, 254: Network, 255, 256: Extension telephone, 257, 286: Link wireless device, 275, 291, 285: Base station, 271, 281: Communication device, 273, 283: Call monitor , 310: wireless unit, 311: duplexer, 312: transmission device, 313: reception device, 314: antenna, 320: control unit, 321: control device, 322: storage device, 330: user interface, 331: display unit 332: Operation unit, 333: Transmission / reception unit.

Claims (4)

And the radio control station, a base station, a line control unit in a wireless communication system having a terminal station,
When the wireless control station is disconnected during priority communication between the base station and the line control device,
The terminal station is a wireless communication system that disconnects priority communication and enters a standby state by a disconnection signal transmitted from the line control device via the base station ,
The line control device gives priority to the radio control station when the priority communication and the originator of the location registration request match the sender of the location registration request transmitted from the radio control station and the originator of the priority communication. A wireless communication system, characterized in that it determines that it has left communication and transmits a priority communication disconnection signal to the terminal station via the base station . In a wireless communication system having a wireless control station, a base station, a line control device, and a terminal station,
When the wireless control station is disconnected during priority communication between the base station and the line control device,
The terminal station is a wireless communication system that disconnects priority communication and enters a standby state by a disconnection signal transmitted from the line control device via the base station,
The line control device gives priority to the radio control station when the priority communication and the call request originator match the call originator of the call request transmitted from the radio control station and the caller of the priority communication. A wireless communication system, characterized in that it determines that it has left communication and transmits a priority communication disconnection signal to the terminal station via the base station. In a wireless communication system having a wireless control station, a base station, a line control device, and a terminal station,
When the wireless control station is disconnected during priority communication between the base station and the line control device,
The terminal station is a wireless communication system that disconnects priority communication and enters a standby state by a disconnection signal transmitted from the line control device via the base station,
The line control device gives priority to the wireless control station when the priority communication and the caller of the incoming call response match the sender of the incoming call response sent from the wireless control station and the sender of the priority communication. A wireless communication system, characterized in that it determines that it has left communication and transmits a priority communication disconnection signal to the terminal station via the base station. A wireless communication system having a wireless control station, a base station, a line control device, and a terminal station,
When the wireless control station is disconnected during priority communication between the base station and the line control device,
The base station periodically transmits a group communication call that is information including a group number and a caller number to the radio control station,
The radio control station compares the local station number and the caller number of the priority communication, and if they match, sends a priority communication disconnection request to the line control device,
The wireless communication system according to claim 1, wherein the terminal station disconnects priority communication and enters a standby state by a disconnection signal transmitted from the line control device via the base station.

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