JP7459359B2 - Train radio systems, train mobile stations and central equipment - Google Patents

Description

The present invention relates to a train radio system.

Conventional train radio systems have a system in which when an abnormality such as a falling rock occurs on the tracks, the train that detects the abnormality issues a protection signal, and other trains that receive the protection signal sound a protection alarm sound. However, there is a mechanism to stop other trains in question.

Since the subway is an environment where it is difficult for radio waves to reach between trains, protection signals are transmitted between trains via base stations installed on the tracks. In the conventional technology, all base stations transmit protection signals to stop trains over the entire section.

In response to this, Patent Document 1 discloses a mechanism for stopping trains in specific sections, such as the surrounding area of the train that issued the protection signal, using train position information from the train that issued the signal.

JP 2014-46818 A

Conventional train radio systems have problems in that they are not suitable for train operation on the congested train schedules of recent years, as they cannot stop trains in a specific section, resulting in a large service stop range and long service stop times.

According to the technique disclosed in Patent Document 1, it is possible to stop trains in a specific section, but since train position information is used, there is a problem in that it is necessary to introduce an expensive system such as a transponder.

In view of the above problems, the present invention aims to stop trains in a specific section in a train radio system without using train position information.

The train radio system of the present disclosure includes: a train mobile station mounted on a train that issues a protection warning signal; a plurality of base stations arranged along the train running track and assigned unique base station numbers; a central device that communicates with the train mobile station via a base station having a wireless communication area at the location of the train mobile station, and each base station notifies its own base station number to the train mobile station within the wireless communication area. Then, the train mobile station stores the base station number notified from the base station, includes the stored base station number in a protection alarm signal, and transmits it to the central device via the base station, and the central device transmits the protection alarm signal. The base station number included in the notification signal and the base station number following this are included in the protection reception signal and transmitted to the base station.

According to the present disclosure, since the base station number is notified from the base station to the train mobile station, by including the base station number in the protection alarm signal issued by the train mobile station, the protection alarm signal is sent to the central device. It is possible to tell the base station to which the train mobile station that issued the notification belongs. Therefore, by including the base station number selected based on the base station number included in the protection alarm signal in the protection reception signal and transmitting it to the base station, the central device can track trains in a specific section without using train position information. It can be stopped.

1 is a configuration diagram of a train radio system according to a first embodiment; FIG. FIG. 3 is a diagram showing a frame structure of a control signal between a base station and a train mobile station in the train radio system according to the first embodiment. 2 is a flowchart showing the operation of the train radio system after the central unit receives the protection signal. FIG. 11 is a configuration diagram of a train radio system according to a second embodiment. FIG. 7 is a diagram showing a frame structure of a control signal between a base station, a notification base station, and a train mobile station in a train radio system according to a second embodiment. FIG. 3 is a configuration diagram of a train radio system according to a third embodiment. FIG. 7 is a diagram showing a frame structure of a control signal between a base station and a train mobile station in a train radio system according to a third embodiment.

<A. First embodiment>
<A-1. Composition＞
FIG. 1 shows the configuration of a train radio system 1001 according to the first embodiment. As shown in FIG. 1, the train radio system 1001 includes a command console 101, a central device 102, n base stations 103, and a plurality of train mobile stations 104. The command console 101 and the central device 102 are installed in a train operation control center. The n base stations 103 are arranged along the track on which the train 105 runs, and the wireless communication area 103A of each base station 103 includes the track. The n base stations 103 are assigned unique base station numbers c from 1 to n in the order of arrangement. In this specification, for example, a base station 103 with a base station number c of 1 is represented as a base station 103 (c=1). The train mobile station 104 is a mobile station mounted on the train 105.

The base station 103 is connected to the central device 102 and is also wirelessly connected to a train mobile station 104 existing in its own wireless communication area 103A. Therefore, the train mobile station 104 moves on the track as the train 105 travels, but the train mobile station 104 moves through the base station 103 (hereinafter also referred to as "corresponding base station of the train mobile station 104") having the wireless communication area 103A at that position. It is possible to communicate with the central device 102 or the command console 101 connected to the central device 102. In other words, the base station 103 relays communication between the central device 102 and the train mobile station 104 mounted on the train 105 located in the wireless communication area 103A. Thereby, the ground commander at the operation control center can make a phone call or perform data communication with the train crew members on board the train 105.

The base station 103 repeatedly notifies the train mobile station 104 existing in the wireless communication area 103A of the base station number c at regular intervals. Thereby, the train mobile station 104 grasps the base station number c of the corresponding base station.

When a train crew member detects an abnormality such as a falling rock on the track, he or she operates the train mobile station 104 to issue a protection warning signal. That is, the train mobile station 104 issues a protection alarm signal. This protection alarm signal is transmitted from the train mobile station 104 to the central unit 102 via its corresponding base station. When the train mobile station 104 issues a protection alarm signal, it includes the base station number c of the corresponding base station. Therefore, for example, the base station number 3 is included in the protection alert signal issued from the train mobile station 104 of the train 105 located in the wireless communication area 103A of the base station 103 (c=3).

The central device 102 selects a base station number based on the base station number included in the protection alert signal, includes the selected base station number in the protection reception signal, and transmits it to all base stations 103. The protected reception signal is transmitted from each base station 103 to the train mobile station 104 within its respective wireless communication area 103A. The wireless communication area 103A of the base station 103 whose base station number is included in the protected reception signal becomes the section where the train 105 is to be stopped. Therefore, the central device 102 determines the stop target section based on the base station number included in the protection alarm signal.

As an example, the central device 102 includes the base station number included in the protection alert signal and the base station number consecutive thereto in the protection reception signal. That is, when the protection alert signal includes the base station number 3, the central device 102 includes the base station number 3 and base station numbers 2 and 4, which are increased or decreased by 1, in the protection reception signal. In this example, the wireless communication area 103A of the base station 103 (c=3), which is the corresponding base station of the train mobile station 104 that issued the protection signal, and the base stations 103 (c=2, 4) on both sides thereof is stopped. This is the target section.

However, the base station number selected by the central device 102 is not limited to this. The base station number included in the protection alert signal may not be included in the protection reception signal, and the number of base station numbers included in the protection alert signal may be one or more. Further, when a plurality of base station numbers are included in the protection alert signal, these base station numbers may be continuous or discontinuous. In either case, the central device 102 can arbitrarily determine the stop target section by selecting an arbitrary base station number based on the base station number included in the protection alert signal and including it in the protection reception signal.

The train mobile station 104 receives the protection reception signal from the corresponding base station. Then, when the base station number c of the corresponding base station matches one of the base station numbers included in the protection reception signal, the train mobile station 104 sounds a protection alarm sound. Then, the train crew of the train 105 on which the train mobile station 104 is mounted stops the train 105. For example, when the protection signal includes base station numbers 2, 3, and 4, the train 105 in the wireless communication area 103A of the base station 103 (c=2, 3, 4) stops.

FIG. 2 is a block diagram showing the configuration of the base station 103 and the train mobile station 104.

The base station 103 includes a wireless processing section 21a, a signal processing section 21b, a storage section 21c, and a central device interface section 21d. The wireless processing unit 21a performs wireless communication with the train mobile station 104. The signal processing unit 21b performs various controls within the base station 103. The storage unit 21c stores data such as base station numbers. The central device interface section 21d connects with the central device 102.

The train mobile station 104 includes a radio processing section 22a, a signal processing section 22b, a storage section 22c, an audio output section 22d, and an operation section 22e. The wireless processing unit 22a performs wireless communication with the base station 103. The signal processing unit 22b performs various controls within the train mobile station 104. The storage unit 22c stores data such as base station numbers. The audio output unit 22d causes a speaker mounted on the train 105 to emit a protection warning sound. The operation unit 22e is an input interface through which the train crew operates to issue a protection signal.

The control signal communicated between the base station 103 and the train mobile station 104 consists of a superframe 23a having multiple basic frames 23b. In the example of FIG. 2, one superframe 23a has 16 basic frames 23b from frame 0 to frame 15, of which frame 1 is assigned to notifying the base station number, and frames 0 and 2-15 are assigned to call and data control. Each basic frame 23b is transmitted using time-division control. Therefore, the train mobile station 104 can receive the base station number c from the corresponding base station without interfering with the call and data control.

<A-2. Operation＞
Next, the operations of the base station 103 and the train mobile station 104 will be explained using FIG. 2. First, in the base station 103, the signal processing unit 21b reads the base station number stored in the storage unit 21c, and the wireless processing unit 21a transmits the base station number to the train mobile station 104 at regular intervals. In the train mobile station 104, the radio processing section 22a receives the base station number from the base station 103 at regular intervals, and the signal processing section 22b stores it in the storage section 22c. When the train mobile station 104 moves into the wireless communication area 103A of another base station 103, the train mobile station 104 acquires a base station number from the other base station 103 through the above process. Therefore, the base station number of the corresponding base station is always stored in the storage unit 22c of the train mobile station 104.

When a train crew member performs an alarm operation using the operation unit 22e of the train mobile station 104, the signal processing unit 22b reads out the base station number from the storage unit 22c and includes it in the protection alarm signal, and the wireless processing unit 22a generates the protection alarm signal. is transmitted to the base station 103.

In the base station 103, when the wireless processing unit 21a receives the protection alarm signal from the train mobile station 104, the central device interface unit 21d transmits the protection alarm signal to the central device 102.

When the central device 102 receives the protection alert signal from the base station 103, it transmits the protection reception signal to all base stations 103. The operation of the train radio system 1001 after the central device 102 receives the protection alarm signal will be described below using the flowchart of FIG. 3.

First, the central device 102 receives a protection alarm signal from the base station 103 (step S101). This protection alarm signal includes the base station number x of the corresponding base station when the train mobile station 104 that issued the protection alarm signal issued the alarm. Here, x is any natural number.

Next, the central device 102 selects the base station number x included in the protection alarm signal and the base station numbers x-1 and x+1 that are obtained by increasing or decreasing the base station number x by 1, and uses the selected base station numbers as the protection reception signal. The information is transmitted to all base stations 103 (step S102). That is, this protected received signal includes base station numbers x-1, x, x+1.

After that, each base station 103 transmits a protection reception signal to the train mobile station 104 within the wireless communication area 103A (step S103).

The train mobile station 104 that has received the protection reception signal determines whether the base station number of the corresponding base station stored in the storage unit 22c matches one of the base station numbers attached to the protection reception signal (step S104). If the base station numbers match in step S104, the audio output unit 22d sounds a protection warning sound (step S105); however, if they do not match, the audio output unit 22d does not sound a protection warning sound, and the train radio system 1001 The operation ends.

When the audio output unit 22d sounds a protection warning sound in step S105, the train crew stops the train 105 (step S106). Therefore, in this example, it is possible to stop only the trains 105 located in the wireless communication areas 103A of base station numbers x-1, x, and x+1.

<A-3. Effect>
As explained above, the train radio system 1001 of the first embodiment includes the train mobile station 104 mounted on the train 105 and issuing a protection warning signal, and the train mobile station 104 arranged along the running track of the train 105 and having a unique base station. A central device 102 that communicates with a train mobile station 104 via a plurality of base stations 103 to which station numbers are assigned and a corresponding base station, which is a base station 103 having a wireless communication area 103A at the location of the train mobile station 104. Be prepared. Then, each base station 103 notifies its own base station number to the train mobile station 104 within the wireless communication area 103A, and the train mobile station 104 stores the base station number notified from the base station 103. The base station number is included in the protection alert signal and transmitted to the central device 102 via the corresponding base station, and the central device 102 selects the base station number based on the base station number included in the protection alert signal. The base station number is included in the protected reception signal and transmitted to the plurality of base stations 103. In this way, according to the train radio system 1001, the base station number is notified from the base station 103 to the train mobile station 104. Therefore, by including the base station number in the protection alarm signal issued by the train mobile station 104, , can inform the central device 102 of the base station 103 to which the train mobile station 104 that issued the protection alarm signal belongs. Therefore, by including the base station number selected based on the base station number included in the protection alarm signal in the protection reception signal and transmitting it to each base station 103, the central device 102 can detect a specific section without using train position information. train 105 can be stopped. Therefore, the stoppage time of the train 105 is shortened, contributing to operation on a normal timetable.

Specifically, each base station 103 transmits the protected reception signal received from the central device 102 to the train mobile station 104 within the wireless communication area 103A, and the train mobile station 104 recognizes that the stored base station number corresponds to the protected reception signal. When the number matches the base station number included in the base station number, the train crew can stop the train 105 by sounding a protection alarm.

<B. Embodiment 2>
<B-1. Configuration>
FIG. 4 is a configuration diagram of a train radio system 1002 according to the second embodiment. Train radio system 1002 includes a notification base station 106 in addition to the configuration of train radio system 1001 of the first embodiment. The notification base stations 106 are located at the boundary between the wireless communication areas of two adjacent base stations 103, and are provided alternately with the base stations 103 along the running track of the train 105. That is, (n-1) notification base stations 106 are provided for n base stations 103.

The wireless communication area 106A of the notification base station 106 overlaps with the wireless communication area 103A of the base stations 103 on both sides of the notification base station 106. However, the communication antenna of the notification base station 106 uses an antenna that narrows the range of radio waves, such as a leaky coaxial cable (LCX), and the wireless communication area 106A overlaps between adjacent notification base stations 106. It won't happen.

In the train radio system 1001 of the first embodiment, the base station 103 transmits its own base station number to the train mobile station 104. In contrast, in the train radio system 1002 of the second embodiment, the notification base station 106 transmits the base station numbers of the base stations 103 on both sides to the train mobile station 104. For example, the notification base station 106 installed at the boundary of the wireless communication area 103A between the base station 103 (c=1) and the base station 103 (c=2) uses the base station numbers c=1 and 2 as the train mobile station 103. Send to. In addition, the notification base station 106 installed at the boundary of the wireless communication area 103A between the base station 103 (c=2) and the base station 103 (c=3) uses the base station numbers c=2 and 3 as the train mobile station 103. Send to. In the following explanation, the notification base station 106 installed at the boundary of the wireless communication area 103A between the base station 103 (c=1) and the base station 103 (c=2) will be referred to as the notification base station 106 (c=1, 2). ) etc.

The train mobile station 104 is notified of the base station number of the base station 103 from the notification base station 106, and stores this in the storage unit 22c. Therefore, the base station number stored in the storage unit 22c is determined by the relationship between the position of the train mobile station 104 and the wireless communication area 106A of the notification base station 106. For example, when the train 105 travels from the base station 1 to the base station n, the train mobile station 104 is connected to the notification base station 106 (c=2, If the location does not overlap with the wireless communication area 106A of 3), the storage unit 22c of the train mobile station 104 stores the base station numbers 1 and 2 notified from the notification base station 106 (c=1, 2). If the location overlaps with the wireless communication area 106A of the notification base station 106 (c=2, 3), the base station numbers 2, 3 notified from the notification base station 106 (c=2, 3) are stored. be done. In this way, the train mobile station 104 stores the base station number of the corresponding base station and the base station number of the base station 103 adjacent to the corresponding base station.

FIG. 5 shows the configuration of base station 103, train mobile station 104, and notification base station 106 in train radio system 1002. The configurations of base station 103 and train mobile station 104 are the same as in the first embodiment.

The notification base station 106 includes a wireless processing section 41a, a signal processing section 41b, a storage section 41c, and a central device interface section 41d. The wireless processing unit 41a performs wireless communication with the train mobile station 104. The signal processing unit 41b performs various controls on the notification base station 106. The storage unit 41c stores data such as base station numbers. The central device interface section 41d connects with the central device 102.

The control signal communicated between the base station 103 and the train mobile station 104 consists of a superframe 42a having multiple basic frames 42b. In the example of FIG. 5, one superframe 42a has 16 basic frames 42b from frame 0 to frame 15. Of these, frame 1 is not transmitted, and frame 0 and frames 2-15 are assigned to speech and data control. Each basic frame 42b is transmitted using time-division control.

A control signal communicated between the notification base station 106 and the train mobile station 104 consists of a superframe 43a having a plurality of basic frames 43b. In the example of FIG. 5, one superframe 43a has 16 basic frames 43b from frame 0 to frame 15, of which only frame 1 is allocated to notification of the base station number and is transmitted under time division control. Therefore, the notification base station 106 can notify the train mobile station 104 of the base station number without interfering with the control signal from the base station 103.

<B-2. Operation＞
Next, the operations of the notification base station 106 and the train mobile station 104 will be explained using FIG. 5. First, in the notification base station 106, the signal processing unit 41b reads the base station number stored in the storage unit 41c, and the wireless processing unit 41a transmits the base station number to the train mobile station 104 at regular intervals. In the train mobile station 104, the wireless processing unit 22a receives the base station number from the notification base station 106 at regular intervals, and the signal processing unit 22b stores this in the storage unit 22. When the train mobile station 104 moves into the wireless communication area 106A of another notification base station 106, the train mobile station 104 acquires a base station number from the other notification base station 106 through the above process. Therefore, the storage unit 22c of the train mobile station 104 always stores the base station numbers of the corresponding base station and the base station 103 adjacent thereto.

The operation in which the train mobile station 104 issues a protection alarm signal and the protection alarm signal is received by the central device 102 via the base station 103 is the same as in the first embodiment. When the central device 102 receives the protection alert signal from the base station 103, it transmits the protection reception signal to all base stations 103. The operation of the train radio system 1002 after the central device 102 receives the protection alarm signal will be described below using the flowchart of FIG. 3.

First, the central device 102 receives a protection alarm signal from the base station 103 (step S101). This protection alert signal includes the base station numbers x and x+1 of the corresponding base stations at the time of alerting by the train mobile station 104 that issued the protection alert signal. Here, x is any natural number.

Next, the central device 102 selects the base station numbers x and x+1 included in the protection alarm signal and the base station numbers x-1 and x+2 that are obtained by increasing or decreasing the base station numbers x and x+1 by 1, and converts the selected base station numbers into It is included in the protection reception signal and transmitted to all base stations 103 (step S102). That is, this protected reception signal includes base station numbers x-1, x, x+1, x+2.

After that, each base station 103 transmits a protection reception signal to the train mobile station 104 within the wireless communication area 103A (step S103).

The train mobile station 104 that receives the protection reception signal determines whether one of the two base station numbers stored in the memory unit 22c matches the base station number attached to the protection reception signal (step S104). If the base station numbers match in step S104, the train mobile station 104 sounds a protection alarm (step S105), but if they do not match, no alarm is sounded and the process ends.

When the train mobile station 104 sounds a protection alarm sound in step S105, the train crew of the train 105 carrying the train mobile station 104 stops the train 105 (step S106). Through the above processing, the wireless communication area 103A of the base station 103 (c=x-1, x, x+1, x+2), the notification base station number 106 (c=x-2, x-1), or the notification base station 106 (c=x+2, x+3) The train 105 in the wireless communication area 106A stops.

<B-3. Effect>
A train radio system 1002 according to the second embodiment includes a train mobile station 104 mounted on a train 105 that issues a protection warning signal, and a train mobile station 104 arranged along the running track of the train 105 and assigned a unique base station number. A plurality of base stations 103, a plurality of notification base stations 106 located at the boundary of the wireless communication area 103A of two adjacent base stations 103, and arranged alternately with the base stations 103 along the running track, A central unit 102 communicates with a train mobile station 104 via a corresponding base station, which is a base station 103 having a wireless communication area 103A at the location of the station 104. Then, each notification base station 106 notifies the train mobile station 104 located in its wireless communication area 106A of the base station numbers of the base stations 103 on both sides, and the train mobile station 104 receives notification from the notification base station 106. The stored base station number is included in a protection alarm signal and transmitted to the central device 102 via the corresponding base station, and the central device 102 stores the base station number included in the protection alarm signal. A base station number is selected based on the base station number, and the selected base station number is included in a protection reception signal and transmitted to a plurality of base stations 103. Therefore, when the train mobile station 104 receives the protection reception signal from the base station 103, it determines whether or not it is subject to a stop by determining whether the stored base station number and the protection reception signal match. can do. In this way, the central device 102 can specify the stop section of the train 105 by specifying the base station number included in the protection reception signal, as in the first embodiment. Further, according to the train radio system 1001, since train position information is not used, expensive devices such as transponders are not required. Furthermore, since the train mobile station 104 receives the base station number from the notification base station 106 instead of the base station 103, when it is located at the boundary of the wireless communication area 103A of the two base stations 103, This solves the problem of not being able to obtain a base station number due to radio signal interference.

<C. Third embodiment>
<C-1. Composition＞
FIG. 6 shows the configuration of a train radio system 1003 according to the third embodiment. Compared with the train radio system 1001 according to the first embodiment, the train radio system 1003 according to the third embodiment includes a base station 1031 and a base station 1032 instead of the base station 103. The base stations 1031 and 1032 are alternately arranged along the track on which the train 105 runs. The base stations 1031 and 1032 transmit the base station number to the train mobile station 104 in the same manner as the base station 103 according to the first embodiment, but the transmission timing is different between the base station 1031 and the base station 1032. Therefore, even if the train mobile station 104 is located on the boundary between the wireless communication area 1031A of the base station 1031 and the wireless communication area 1032A of the base station 1032, it is possible to avoid a situation in which the wireless signals from the base stations 1031 and 1032 interfere with each other and the base station number cannot be obtained. Moreover, according to the train radio system 1003, unlike the train radio system 1002 according to the second embodiment, it is not necessary to provide the notification base station 106. The configuration of the train radio system 1003 other than the base stations 1031 and 1032 is the same as that of the train radio system 1001 of the first embodiment.

FIG. 7 is a block diagram of base stations 1031 and 1032 and train mobile station 104 in the third embodiment. The configurations of base station 1031 and base station 1032 are similar to base station 103 in the first embodiment.

A control signal communicated between the base station 1031 and the train mobile station 104 consists of a superframe 61a having a plurality of basic frames 61b. In the example of FIG. 7, one superframe 61a has 16 basic frames 61b from frame 0 to frame 15. Among them, frame 1 is assigned to base station number notification, frame 2 is not transmitted, and frames 0 and 2-15 are assigned to call and data control. Each basic frame 61b is transmitted under time division control.

Control signals communicated between base station 1032 and train mobile station 104 consist of a superframe 62a having multiple basic frames 62b. In the example of FIG. 7, one superframe 62a has 16 basic frames 62b from frame 0 to frame 15. Of these, frame 2 is assigned to base station number notification, frame 1 is not transmitted, and frames 0 and 2-15 are assigned to call and data control. Each basic frame 62b is transmitted under time division control. In this way, since the frames to which base station number notifications are assigned differ in the control signals transmitted from the base stations 1031 and 1032, the base station numbers transmitted from the base stations 1031 and 1032 do not interfere with the train mobile station 104. received without any error.

Except for the frame structure of the control signal from the base stations 1031 and 1032 to the train mobile station 104 described above, this is the same as in the first embodiment.

<C-2. Effects>
In the train radio system 1003 of the third embodiment, two adjacent base stations 1031, 1032 transmit base station numbers at different timings to the train mobile station 104. Therefore, even if the train mobile station 104 is located on the boundary between the wireless communication areas 1031A, 1032A of the two adjacent base stations 1031, 1032, it is possible to obtain the base station number without interference between the wireless signals from both base stations 1031, 1032. Furthermore, the train radio system 1003 does not require the notifying base station 106 as in the train radio system 1002 of the second embodiment, and therefore can be realized with a simple configuration.

In each of the embodiments described above, the base station number of each base station is used in place of the position information to specify the section where the train is to be stopped in the protection signal. This technology can be applied not only to train radio systems but also to communication systems that have functions that are realized using position information of specific sections.

In addition, within the scope of the present invention, it is possible to freely combine each embodiment, and to modify or omit each embodiment as appropriate.

21a, 22a, 41a wireless processing section, 21b, 22b, 41b signal processing section, 21c, 22c, 41c storage section, 21d, 41d central device interface section, 22e operation section, 23a, 42a, 43a, 61a, 62a super frame, 23b, 42b, 43b, 61b, 62b Basic frame, 101 Command console, 102 Central device, 103 Base station, 103A, 106A, 1031A, 1032A Wireless communication area, 104 Train mobile station, 105 Train, 106 Notification base station, 1001 , 1002, 1003 Train radio system.

Claims (5)

A train mobile station that is mounted on a train and issues a protection alarm signal;
A plurality of base stations arranged along a track of the train and each of which is assigned a unique base station number;
a central device that communicates with the train mobile station via the base station having a wireless communication area at the position of the train mobile station;
Each of the base stations notifies the train mobile stations within its wireless communication area of its base station number;
the train mobile station stores the base station number notified from the base station, and transmits the stored base station number to the central device via the base station by including the protection alert signal in the protection alert signal;
The central device transmits the base station number included in the protection alert signal and subsequent base station numbers included in the protection reception signal to the base station.
Train radio system. the base station transmits the protected reception signal received from the central unit to the train mobile station within a wireless communication area;
The train mobile station sounds a protection alarm when the stored base station number matches the base station number included in the protection reception signal.
The train radio system according to claim 1. The two adjacent base stations transmit the base station number to the train mobile station at different timings,
The train radio system according to claim 1 or claim 2. A train mobile station mounted on a train and receiving a protective reception signal,
communicating with a central device through the base station having a wireless communication area at the location of the train mobile station, among a plurality of base stations arranged along the train running track and having a unique base station number;
receiving and storing the base station number from the base station;
When the protected reception signal including the base station number is received from the central device via the base station, the stored base station number matches the base station number included in the received protection reception signal. sound a protective alarm if
Train transfer station. A central device that communicates with a train mobile station mounted on a train via a base station,
The base station is a plurality of base stations arranged along the train running track, has a unique base station number, and has a wireless communication area at the position of the train mobile station,
transmitting the base station number included in the protection alarm signal issued by the train mobile station and a base station number consecutive to the base station number in a protection reception signal to the base station;
Central device.

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