JP2022147462A - Radio communication system and radio communication device - Google Patents

Abstract

To provide a radio communication system and a radio communication device capable of surely transmitting information regardless of a mode by making a call request if there is the call request to itself even in the case that the radio communication device monitors telephone conversation of another device.SOLUTION: A radio communication system and a radio communication device include a central control station 5 for achieving telephone communication between a ground facility and a first radio communication device (for example, a mobile station 6) with a specific slot for telephone communication, and achieving telephone communication between the ground facility and a second radio communication device (for example, a maintenance terminal 7) with a free slot for telephone communication, the central control station 5 transmits a specific slot for control including a call request to the first radio communication device or a call request to the second radio communication device, the second radio communication device monitors the specific slot for control, monitors the telephone conversation when the call request to the first radio communication device is received, and interrupts the monitoring to start telephone conversion when a call request to itself is received with the specific slot for control during monitoring.SELECTED DRAWING: Figure 4

Description

The present invention relates to a radio communication system and a radio communication device used in a mobile radio system or the like. The present invention relates to a wireless communication system and a wireless communication device capable of starting a call and improving convenience.

[Description of prior art]
Some radio communication systems are used for train radio systems.
In such a radio communication system, communication between a ground station and an on-board station mounted on a train (train radio) and communication between the ground station and a maintenance terminal (radio communication device) carried by maintenance personnel are performed. (maintenance radio) is realized by using a TDMA (Time Division Multiple Access) system.

In train radio, voice communication and data communication of vehicle information are performed between the train radio communication console, which is the ground station operated by the operation manager, and the on-board station (mobile station) mounted on each train.
In maintenance radio, voice communication is performed between a maintenance communication console, which is a ground station operated by a maintenance manager, and a maintenance terminal carried by a maintenance worker, or between maintenance terminals.

The maintenance terminal also has a train radio monitor mode and a maintenance radio mode as operation modes (receiving modes). In the train radio monitor mode, the maintenance terminal monitors (intercepts) the train radio, and in the maintenance radio mode, performs voice communication with the maintenance communication console or between the maintenance terminals.
The control unit of the maintenance terminal holds the operation mode set by the operation unit of the maintenance terminal, controls each unit according to the operation mode, and performs appropriate operations.

The radio communication system is provided with a central control unit, which performs line control and call control in train radio and maintenance radio to realize various communications.

[Processing of mode switching in maintenance terminal: FIG. 6]
Here, the mode switching process in the maintenance terminal will be described with reference to FIG. FIG. 6 is a flowchart showing mode switching processing in the maintenance terminal.
As shown in FIG. 6, the control unit of the maintenance terminal determines whether or not a mode switching operation has been performed from the operation unit (S31), and if not, returns to S31 and waits for an operation.

Further, when the mode switching operation is performed in step S31, the control unit determines whether the switching destination mode is the train radio monitor mode or the maintenance radio mode (S32). If the switching destination is the train radio monitor mode, the train radio monitor mode is set (S33), and if the maintenance radio mode is selected, the maintenance radio mode is set (S34), and the process ends.
In this manner, mode switching is performed in the maintenance terminal carried by the maintenance personnel.

[Operation in a conventional maintenance terminal: FIG. 7]
Next, the operation of a conventional maintenance terminal will be described with reference to FIG. FIG. 7 is a flow chart showing the operation of a conventional maintenance terminal.
In a conventional radio communication system, T1 and T2 are provided as channels for TDMA voice communication, T1 is used for train radio, and T2 is used for maintenance radio.

Then, as shown in FIG. 7, when the operation is started, the control unit of the maintenance terminal determines whether the currently set reception mode is the train radio monitor mode or the maintenance radio mode (S41). ).
If the set reception mode is the train radio monitor mode, the control section controls the radio section to wait for reception at T1 (S42).

The control unit determines whether or not there is an incoming call at T1 (S43), and returns to step S41 if there is no incoming call.
If there is an incoming call in the process S43, the control unit monitors the train radio (S44), determines whether the call has ended (the call has ended) (S45), and if the call has not ended (No ), the process returns to step S44 to continue monitoring.
In addition, when the call is terminated (Yes) in step S45, the control unit returns to step S41 and repeats the same processing.

In step S41, if the set reception mode is the maintenance radio mode, the control unit waits for reception in T2 (S46), determines whether or not there is an incoming call (S47), and if there is no incoming call, performs processing. Return to S41.
Also, if there is an incoming call in step S47, the control section performs a maintenance radio call (S48), determines whether the call has ended (S49), and if the call has not ended (if No), Returning to processing S48, the call is continued.
If the call ends in step S49 (Yes), the control unit returns to step S41.
In this way, the operation of the conventional maintenance terminal was performed.

In other words, in the conventional maintenance terminal, since the waiting slot is switched according to the reception mode, when the train radio monitor mode is set, the monitoring is performed only in the slot T1, and the original maintenance radio call request is sent in the slot T2. cannot be received even if there is

[Related technology]
Incidentally, as a conventional technique of a wireless communication system, there is Japanese Patent Laying-Open No. 2014-155210 “Wireless Communication System” (Patent Document 1).
Japanese Patent Laid-Open No. 2002-200000 describes monitoring of a voice call conducted via a base station located far from a monitor device.

JP 2014-155210 A

As described above, in the conventional wireless communication system, the receiving slot is determined by the set receiving mode in the wireless communication device (maintenance terminal). There was a problem that even if a call request for a maintenance radio call was generated, it could not be received and was inconvenient.

In addition, in Patent Document 1, when a wireless communication device monitors a mobile call, it monitors a control channel and calls a maintenance call using an empty slot of a voice channel on the control channel. Interrupting the monitor to make another call upon receiving a request is not described.

The present invention has been made in view of the above-mentioned actual situation. When a call request for a call using an empty slot is received in a control channel while monitoring a call, the monitoring can be interrupted and the call can be started. An object of the present invention is to provide a wireless communication system and a wireless communication device that can improve convenience.

The present invention for solving the problems of the above-mentioned prior art is to make a call between a ground facility and a first wireless communication device in a specific slot for a call in a communication system of time division multiple access, and A radio communication system having a central control station for making a call between a ground facility and a second radio communication device in an empty slot, wherein the central control station uses a specific slot for control in the communication system to perform the first radio communication A call request to the device or a call request to the second wireless communication device is transmitted, and the second wireless communication device monitors a specific slot for control and sends a call request to the first wireless communication device. Upon reception, the call between the first wireless communication device and the ground equipment is monitored, and when a call request to the second wireless communication device is received during the monitoring, the monitoring is interrupted and the call for the call request is started. It is characterized by

In the radio communication system of the present invention, the central control station transmits a call request for a priority call having a high priority in a specific slot for control, and the second radio When a slot is monitored and a call request for a priority call is received, the monitor is interrupted if monitoring is in progress, and the call is interrupted if a call is in progress with ground equipment to start the priority call. .

Further, in the above wireless communication system, the second wireless communication device is configured to continue a call between the ground equipment and the first wireless communication device in a specific slot for control when the call with the ground equipment is terminated. It is characterized by restarting the monitoring of the call when information indicating that the call is continuing is received.

Further, the present invention is a radio communication apparatus for making a call with a ground facility in an empty slot for a call in a communication system of time division multiple access, monitoring a specific slot for control in the communication system, and When a call request for a call made between the equipment and another wireless communication device is received, the call is monitored, and when a call request is received from the ground equipment at a specific slot during the monitoring, monitoring is interrupted and the call is received. It is characterized by initiating a request call.

Further, in the radio communication apparatus of the present invention, a specific slot for control is monitored, and when a call request for a priority call with a high priority is received in the specific slot, the monitoring is interrupted if monitoring is being performed, It is characterized by interrupting the call and starting a priority call if the call is in progress with the equipment.

Further, the present invention is characterized in that, when a call with a ground facility ends, if the call continues between the ground facility and another wireless communication device, monitoring of the call is resumed.

According to the present invention, a call is made between a ground facility and a first wireless communication device in a specific slot for a call in a time division multiple access communication method, and an empty slot for a call in the communication method is used to make a call with the second wireless communication device. wherein the central control station issues a call request to the first wireless communication device or a second A second wireless communication device monitors a specific slot for control, and receives a call request to the first wireless communication device. and ground equipment, and if a call request to the second radio communication device is received during the monitoring, the monitoring is interrupted and the call for the call request is started. For example, when the second radio communication device receives a call request addressed to itself in a specific slot for control while monitoring the radio call of the first radio communication device, the call request can be made, and mode There is an effect that information can be flexibly acquired without being fixed by , and convenience can be improved.

Further, according to the present invention, in the radio communication system, the central control station transmits a call request for a priority call with a high priority in a specific slot for control, and the second radio communication device transmits A wireless communication system that monitors a specific slot of a mobile station, and when receiving a call request for a priority call, interrupts the monitoring if monitoring is in progress, interrupts the call if a call is in progress with ground equipment, and initiates a priority call. Therefore, there is an effect that a priority call with a high priority can be reliably received even during monitoring or during a call.

Further, according to the present invention, there is provided a wireless communication apparatus that performs a call with a ground facility in an empty slot for a call in a time division multiple access communication system, wherein a specific slot for control in the communication system is monitored, and a specific slot for control is monitored. When a call request for a call made between the ground equipment and another radio communication device is received, the call is monitored, and if a call request is received from the ground equipment at a specific slot during the monitoring, the monitoring is interrupted. Since the wireless communication device is configured to initiate a call requesting the call request, for example, when a call request addressed to itself is received in a specific slot for control while monitoring the wireless call of the first wireless communication device, the call request is issued. A call can be made, and information can be obtained flexibly without being fixed by the mode, which has the effect of improving convenience.

1 is a schematic configuration diagram of the present wireless communication system; FIG. 3 is a block diagram showing a schematic configuration of a maintenance terminal 7; FIG. FIG. 2 is an explanatory diagram showing the structure of a TDMA slot; FIG. 4 is a flow chart showing processing of the maintenance terminal 7 in a train radio monitor mode; It is a flowchart which shows the process by the telephone call with a high priority. 10 is a flowchart showing mode switching processing in the maintenance terminal; 3 is a flow chart showing the operation of a conventional maintenance terminal;

An embodiment of the present invention will be described with reference to the drawings.
[Outline of Embodiment]
A radio communication system according to an embodiment of the present invention (this radio communication system) is a communication system using TDMA, in which movement between a ground facility and an on-board station as a first radio communication device is performed in a specific slot for communication. Equipped with a central control station that realizes a call and implements a maintenance call between ground equipment and a maintenance terminal as a second wireless communication device in an empty slot for call, and the central control station moves to a specific slot for control. When the maintenance terminal monitors a specific slot for control and receives the mobile call call request, it monitors the mobile call and is in the process of monitoring. However, if a call request for a maintenance call is received in a specific slot for control, the monitoring is interrupted and a maintenance call is started. In addition, the maintenance call can be made, and convenience can be improved, and the safety of the equipment to be maintained can be improved.

[Schematic configuration of this wireless communication system: Fig. 1]
A schematic configuration of this radio communication system will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of this wireless communication system. In this embodiment, a case where the present invention is applied to a train radio system will be described as an example, but the present invention is not limited to the train radio system.

As shown in FIG. 1, this radio communication system includes a train radio communication console 1, a maintenance radio communication console 2, a central control station 3, a base station 4, and an on-board station 6 mounted on a train 5. and a maintenance terminal 7 carried by a maintenance worker.
Among them, the central control station 3 and the maintenance terminal 7 are characteristic parts of this wireless communication system, and the other parts have the same configuration and operation as the conventional ones.
The ground equipment described in the claims includes the train radio communication console 1 and the maintenance radio communication console 2 . The on-board station 6 corresponds to the first wireless communication device described in the claims, and the maintenance terminal 7 corresponds to the second wireless communication device described in the claims.

Each part of this wireless communication system will be described.
The train radio communication console 1 is the same as the conventional one, and is operated by the operation manager to perform voice communication with the on-board station 6 mounted on the train 5 and data communication of vehicle information.
The maintenance wireless communication console 2 is operated by the maintenance manager and performs voice communication with the maintenance terminal 7 carried by the maintenance worker, as in the conventional case.

The central control station 3 performs line control and call control in the train radio and maintenance radio as in the conventional system. It is transmitted in a control slot so that it can be received at all times.
Also, as will be described later, each voice call is assigned a unique call number for management.

The base station 4 is connected to the central control station 3 through a wired line, and is also connected to the mobile station 6 and the maintenance terminal 7 within the communication range through a radio line to perform radio communication.
The on-board station 6 is mounted on the train 5, performs voice communication with the train radio communication console 1, and transmits and receives data such as vehicle information.

The maintenance terminal 7 is a wireless communication device carried by a maintenance worker, and performs train radio monitoring and voice communication in the same manner as in the past.
In particular, the maintenance terminal 7 of this radio communication system constantly monitors a control slot, as will be described later. , interrupts monitoring and initiates a maintenance radio call.

Furthermore, the maintenance terminal 7 uses a control slot during a maintenance radio call to make a priority call with a higher priority than general train radio voice calls and maintenance radio voice calls, for example, to notify emergency situations such as earthquake early warnings. When the all-out call is detected, the maintenance radio call is terminated and the priority call with the higher priority is performed.
The operation of the maintenance terminal 7 will be described later.

[Configuration of maintenance terminal 7: FIG. 2]
A configuration of the maintenance terminal 7 will be described with reference to FIG. FIG. 2 is a block diagram showing a schematic configuration of the maintenance terminal 7. As shown in FIG.
As shown in FIG. 2 , the maintenance terminal 7 includes a control section 71 , a wireless section 72 , a storage section 73 , a microphone 75 and a speaker 76 .
An antenna 72 a for wireless communication is connected to the wireless unit 72 .
The control unit 71 activates a program stored in the storage unit 73 , controls each unit that configures the maintenance terminal 7 , and controls the overall operation of the maintenance terminal 7 .

[TDMA slot structure: Fig. 3]
Next, the configuration of the TDMA slots used in this radio communication system will be explained using FIG. FIG. 3 is an explanatory diagram showing the structure of a TDMA slot.
As shown in FIG. 3, the TDMA slots of this system are composed of four slots, slot 0 to slot 3. Slot 0 and slot 1 are assigned voice communication channels T1 and T2, respectively. Slot 3 is used as channels D1 and D2 for data communication.

The data channels of slots 2 and 3 are also used as control channels in MCA (Multi-Channel Access). is sent.
In this radio communication system, a train radio voice call is performed using T1 and T2 in that order, and a maintenance call is performed using T2 if T2 is available.
A train radio voice call corresponds to a mobile call described in the claims, and a maintenance radio voice call corresponds to a maintenance call.

[Operation on maintenance terminal]
The operation of the maintenance terminal 7 of this wireless communication system will be described.
The maintenance terminal 7 operates according to the mode set by the mode switching process shown in FIG. 6, as in the conventional art.
In other words, when the train radio monitor mode is set, the train radio is monitored, and when the maintenance radio mode is set, a voice call is made by the maintenance radio, but the operation in each mode is different from the conventional one. .

For example, in the maintenance terminal 7 of this radio communication system, even in the train radio monitor mode, when there is a call for a maintenance call, the maintenance call is made.
Also, if a higher priority call is received during train radio monitoring or a maintenance call, the current monitoring or call is interrupted and a call based on the higher priority call is started. High-priority calls include, for example, emergency calls such as simultaneous earthquake calls.

In order to realize these operations, in this radio communication system, slot 3 (channel D1) shown in FIG. When the call request is received, the channel to be used is added to the call request and transmitted using D1.
The maintenance terminal 7 constantly monitors the channel D1 to check whether or not a call request is received, and detects the presence or absence of a voice call.

Then, even in the train radio monitor mode, the control unit 71 of the maintenance terminal 7 controls to shift to the maintenance radio call when receiving the maintenance radio call request on the channel D1.
Also, the control unit 71 of the maintenance terminal 7 monitors the channel D1 during train radio monitoring or maintenance radio communication, and when there is a call request for a call with a high priority, Control transitions to higher calls.
These processes will be specifically described below.

[Processing in Train Radio Monitor Mode: Fig. 4]
Processing of the control unit 71 when the train radio monitor mode is set in the maintenance terminal 7 will be described with reference to FIG. FIG. 4 is a flow chart showing the processing of the maintenance terminal 7 in the train radio monitor mode.
As shown in FIG. 4, when the train radio monitor mode is set, the controller 71 of the maintenance terminal 7 constantly monitors the channel D1 to see if there is an incoming maintenance radio. It is determined whether or not a call request is included (S11).

If no maintenance radio call request is included and there is no incoming call (No), the control unit 71 monitors D1 to see if there is an incoming train radio call (a train radio call request is included). (S12), and if there is no train radio call (No), the process returns to step S11 to continue monitoring channel D1.

If there is an incoming train radio signal in step S12 (Yes), the controller 71 monitors the train radio signal (S13). A channel to be used is also specified for the channel D1, and for example, a train radio is monitored on the channel T1.

The control unit 71 monitors the channel D1 to check whether or not there is an incoming maintenance radio even while monitoring the train radio. It is determined whether or not the train radio has ended (S15), and if it has not ended (if No), the process shifts to step S13 to continue monitoring the train radio. In step S15, when the train radio is terminated (if Yes), the process shifts to step S11 to monitor channel D1.

Further, when an incoming maintenance radio call is detected in processing S11 and processing S14 (if Yes), the control unit 71 suspends train radio monitoring, calls a maintenance radio call, and selects channel T2. Then, a maintenance radio call is made (S16).

Then, the control unit 71 determines whether or not the maintenance radio call has ended (S17), and if the maintenance radio call has not ended (in the case of No), the process proceeds to step S16 to continue the maintenance radio call.
If the maintenance radio call has ended in step S17 (Yes), the control unit 71 checks the channel D1, and if the train radio is continuing (Yes), the process proceeds to step S13. , again monitors the train radio at T1.

For example, in the central control station 5, information (call number, etc.) related to the train radio call being monitored by the maintenance terminal 7 is stored. It is determined whether or not the train radio communication is continuing, and if so, the maintenance terminal 7 can return to train radio monitoring by transmitting D1 including the call number and the used channel. It is possible. The call number is transmitted by, for example, RICH (Radio Information Channel) in the slot.

Further, if the train radio communication is not ongoing and has ended in the process S18 (No), the process returns to the process S11 to monitor the channel D1.
In this manner, processing in the train radio monitor mode of the maintenance terminal of this radio communication system is performed.

As a result, in this radio communication system, even if the maintenance terminal 7 is set to the train radio monitor mode, and even if the train radio is being monitored, when there is an incoming maintenance radio, the maintenance radio can be quickly monitored. A telephone call can be realized, and information about maintenance work can be reliably transmitted to the maintenance worker.

[Processing by high priority call: Fig. 5]
Next, with reference to FIG. 5, a description will be given of the processing in the maintenance terminal 7 when there is a high-priority call while a maintenance call or train radio monitor is in progress. FIG. 5 is a flow chart showing processing for a high priority call.
As shown in FIG. 5, the control unit 71 of the maintenance terminal 7 monitors channel D1 during a maintenance call or during train radio monitoring, and determines whether or not there is a high-priority call call (S21). .

Here, in this wireless communication system, a priority is set for each type of call, and the central control station 5 attaches a type to the call request and transmits it on the channel D1.
The control unit 71 of the maintenance terminal 7 stores in advance the priority corresponding to the type, checks the type attached to the call request, and determines the priority.

In the process S21, if there is no incoming call with a high priority (No), the control unit 71 continues monitoring the channel D1 in the process S21.
If there is an incoming call with a high priority in step S21 (Yes), the control unit 71 interrupts the current maintenance radio call or monitor (train radio monitor) (S22). , make a call with a higher priority (S23).

Then, the control unit 71 determines whether or not the call with high priority has ended (S24), and if not (No), returns to the process S23 to continue the call.
Further, when the call with a high priority is terminated in the process S24 (if Yes), the control unit 71 checks D1, and the train radio (original train radio) monitored before interruption is turned off. It is determined whether it continues (S25), and if it continues (Yes), the train radio is monitored (S26), and the process ends.
If the original train radio communication is not continued in step S25 (No), the process ends.
In this manner, processing is performed when there is a call with a high priority.

Here, the case where a high priority call is also made by a maintenance radio voice call has been described as an example, but when there is a high priority call only on the train radio, the control unit 71 causes D1 to Recognizing this fact, the current train radio monitoring or maintenance call is interrupted, train radio monitoring is started on channel T1, and the high priority call is monitored.

[Effects of Embodiment]
This wireless communication system) realizes mobile communication between ground equipment and on-board station 6 in a specific slot for communication in communication using TDMA, and ground equipment and maintenance terminal 7 in an empty slot for communication. The central control station 5 transmits a mobile call call request or a maintenance call call request to a specific slot for control, and the control unit 71 of the maintenance terminal 7 , monitoring a specific slot for control, and when receiving a call request for a mobile call, monitors the mobile call; The monitoring of the mobile call is interrupted to start the maintenance call, and when a call for the maintenance call occurs during the monitoring of the mobile call, the maintenance call is highly important for the maintenance worker. It is possible to obtain information flexibly without being fixed in the mode, and there is an effect that convenience can be improved and the safety of the equipment to be maintained can be improved.

Further, according to this radio communication system, the central control station 5 transmits a call request for a call having a higher priority than the maintenance call in a specific slot for control, and the control unit 71 of the maintenance terminal 7 sends a call request for control When a call request for a call with a high priority is received, the monitoring is interrupted if a mobile call is being monitored, and if a maintenance call is being made, the maintenance call is interrupted and the priority is Since a high-priority call such as an emergency earthquake all-in-one report is given priority, information transmission can be ensured.

In the above-described embodiment, the case where the radio communication system is the train radio communication system, the on-board station is the first radio communication device, and the maintenance terminal is the second radio communication device has been described as an example. . However, the present invention is not limited to this, as long as the first wireless communication device and the second wireless communication device are different, and the second wireless communication device It is sufficient that it operates in a monitor mode (for example, the train radio monitor mode described in the embodiment) to monitor the call of the other and a call mode (for example, the maintenance radio mode described in the embodiment) to make a call.

According to the present invention, when a call request for another call using an empty slot is received on a control channel while monitoring a mobile call, the monitoring can be interrupted and the other call can be started, thereby improving convenience. It is suitable for wireless communication systems and wireless communication devices that can

DESCRIPTION OF SYMBOLS 1... Train radio communication console 2... Maintenance radio communication console 3... Central control station 4... Base station 5... Train 6... On-board station 7... Maintenance terminal 71... Control part 72... Radio Part 72a... Antenna 73... Storage part 74... Operation display part

Claims (6)

A call is made between a ground facility and a first wireless communication device in a specific slot for a call in a time-division multiple access communication system, and a free slot for a call in the communication system is used between the ground facility and a second wireless communication device. A wireless communication system having a central control station for making calls,
The central control station transmits a call request to the first wireless communication device or a call request to the second wireless communication device in a specific slot for control in the communication method,
The second radio communication device monitors the specific slot for control, and when receiving a call request to the first radio communication device, monitors the call between the first radio communication device and the ground equipment. and, during the monitoring, when a call request to the second wireless communication device is received, the monitoring is interrupted and a call for the call request is started. The central control station transmits a call request for a priority call with a high priority in a specific slot for control,
The second wireless communication device monitors the specific slot for control, and when receiving the call request for the priority call, suspends the monitoring if the monitoring is in progress, and cancels the monitoring if the ground equipment is in the call. 2. The wireless communication system according to claim 1, wherein the priority call is started after interrupting the call. When the second radio communication device receives information indicating that the communication between the ground equipment and the first radio communication device is continuing in the specific slot for control when the communication with the ground equipment is terminated. 3. The radio communication system according to claim 1, wherein the monitoring of the call is restarted. A wireless communication device that performs a call with a ground facility in an empty call slot in a time division multiple access communication method,
A specific slot for control in the communication system is monitored, and when a call request for a call between ground equipment and another radio communication device is received in the specific slot, the call is monitored, and during the monitoring, the A radio communication apparatus characterized in that, when a call request is received from the ground equipment at a specific slot, the monitor is interrupted and a call for the call request is started. A specific slot for control is monitored, and when a call request for a priority call having a high priority is received in the specific slot, the monitoring is interrupted if the monitoring is being performed, and the call is terminated if the communication is being performed with the ground equipment. 5. The wireless communication device according to claim 4, wherein the priority call is started after interruption. 6. The radio according to claim 4 or 5, characterized in that, when a call with said ground equipment is terminated, if a call continues between said ground equipment and said other radio communication device, monitoring of said call is resumed. Communication device.

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