JP2823059B2 - Train wireless communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train radio communication system for transmitting and receiving calls, transmitting and receiving control signals, and polling between a central train such as a command center.

[0002]

2. Description of the Related Art FIG. 5 is a system configuration diagram of a conventional polling train radio communication system described in, for example, Railway Communication (June, 1989, pp. 7-12). In order to communicate with the central device 1, the central devices 2a and 2b of the train radio communication systems installed in the places and the like are train radio devices mounted on each of a plurality of trains on the line, 3, 3a, 3b and Reference numerals 4, 4a and 4b denote communication transmitters and transmitting antennas in the central device 1 and the train radio devices 2a and 2b, and reference numerals 5, 5a and 5b and 6, 6a and 6b denote communication systems in the central device 1 and the train radio devices 2a and 2b. Receivers and receiving antennas, 7, 7a, 7b are control units for controlling the communication transmitters 3, 3a, 3b and the communication receivers 5, 5a, 5b, and 8 is a central unit 1 to each train radio 2
A communication radio signal transmitted to a and 2b, and 9 is a communication radio signal transmitted from each of the train radio devices 2a and 2b.

FIGS. 6 and 7 are sequence diagrams showing transmission and reception of a call signal (voice signal), a polling signal, train emergency information, and the like in a radio section in the train radio communication system of FIG. 10 is the central unit side control, 11 is the train radio unit 2
a, 2b side control (train side control), 12 is a wireless transmission section between the central unit side control 10 and the train side control 11, 13a, 1
3b to 13e and 13f and 13g are polling signals from the central unit 1 to each train, 14a, 14b to 14e and 1
4f indicates a polling answer signal from each train to the central device 1. Reference numeral 15 denotes a speech signal between the central device 1 and the train k. Note that the vertical axis indicates time t, and indicates the passage of time from top to bottom.

Next, the operation will be described. In FIG. 5, a voice, a control signal, and the like input from the control unit 7 of the central device 1 to the communication transmitter 3 are modulated into a radio frequency by the communication transmitter 3 and are converted into a communication radio signal 8 via the transmission antenna 4. It is transmitted to the train radio devices 2a and 2b of the trains on the line. On the other hand, the communication radio signal 9 from each of the train radio devices 2a and 2b causes interference if the train radio devices 2a and 2b of a plurality of trains output simultaneously, so that the central device 1 cannot determine it. Each of the train radio devices 2a, 2b, etc. determines the control signal (polling signal, etc.) transmitted from the central device 1 in the control units 7a, 7b to determine whether or not the own device can transmit.

FIGS. 6 and 7 show examples of signal transmission sequences in the above configuration.

In FIG. 6, when a call is not made between the central unit 1 and each train, the central unit 1 transmits a period T
In step 1, the polling signals 13a, 13b to 13e are sequentially transmitted as the communication radio signal 8, and polling is performed. Each polled train has an answer signal 1 for polling
4a and 14b to 14e are returned as the communication radio signal 9. The information included in the answer signal differs depending on the system, and includes train line information, train failure information, train call information, emergency information, and the like.

[0007] Now, when the train 1, is doing the exchange of train 2 ... and in turn polling signal and the answer signal, if the call request has occurred in the train k, train k is waiting for the polling signal 13c to its own train The call information is included in the answer signal 14c of k and transmitted to the central unit 1. As a result, a call is started between the central device 1 and one train k by the call voice signal 15. At the same time, polling for all trains is suspended. Even if emergency emergency information occurs on another train (train k + 2 in the figure) during this call, the call on train k ends, polling resumes, and
When the polling signal 13e is received for this train k
+2 can transmit the emergency information to the central unit 1 for the first time by including the emergency information in the answer signal 14e of the train k + 2.

FIG. 7 shows one train in FIG.
To also allow transmission of very information generated in other trains in the central unit 1 during're, all trains polling signal 13f for all trains with a constant period T2 by interrupting the call during the call, 13g Is used to perform polling. If no trains have emergency information,
There is no answer signal against the whole train polling signal 13f. On the other hand, when emergency information is generated for a certain train (train 1 in the figure), the train 1 transmits emergency information to the central device 1 with an answer signal 14f for the next all-train polling signal 13g included.

[0009]

Since the conventional train radio communication system based on the polling system is configured as described above, call information and emergency information from each train are transmitted to the central unit 1.
When transmitting to has to wait until his polling signal is sent, the maximum wait time "T1 x
The transmission delay of " the number of trains on the line" occurred. In particular, emergency information having urgency cannot be sent during a call in the case of FIG.
Even in the case of FIG. 7 in which this is improved, although the means for transmitting the emergency information is secured, it is inevitable that the delay will be the period T2, and the call is interrupted during polling of all trains, and the call voice is reduced. There were issues such as interruption .

The present invention has been made in order to solve the above-mentioned problems, and always performs polling at the time of non-communication between a central train and a train so that the state of the train can be grasped at the center and the call information of the train and emergency information can be obtained. It is an object of the present invention to obtain a train radio communication system capable of transmitting such information to a central device promptly when information or the like occurs.

[0011]

A train radio according to the present invention
Communication systems allow a central unit to port at a given frequency.
Call each train on the line in order using the ring method, if necessary
For example, by making a call between the train and the central unit,
Make a wireless call between the central unit and multiple trains
In addition, each train on the train
Has a radio frequency different from that of the
Transmission means for transmitting emergency radio signals containing
The central unit receives the emergency radio signal.
Communication means, the wireless communication destination of the central
Switch to the train on which the emergency radio signal was transmitted
It is. The train radio communication system according to the present invention provides
Means for transmitting emergency radio signals even in response to call information.
It can be.

[0012]

The train radio communication system according to the present invention uses a two-wave radio signal of a communication system to sequentially perform polling and communication from the central unit to each train during non-communications, and to implement urgency from each train. If there is some information (very information, etc.)
Call the center using an emergency radio signal and transmit. Further, since these three radio signals of the communication system and the emergency system are controlled by one control unit in each device, the three radio signals can operate organically as a system. For example, a central response signal to an emergency signal can be transmitted in a communication system.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, portions corresponding to those in FIG. 5 are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 1, 18 and 19 are central units 1
Emergency receiver and receiving antenna provided in the
Reference numerals 20b and 21a and 21b denote emergency transmitters and transmitting antennas provided in the train radio devices 2a and 2b, and reference numeral 22 denotes an emergency radio signal transmitted from the train radio devices 2a and 2b to the central device 1. The speech radio signals 8, 9 and the emergency radio signal 22 are three radio signals having different frequencies. In the figure, 7a, 7b, 20a, 20b,
21a and 21b constitute transmission means, and 7, 18, and 19 constitute reception means.

FIGS. 2 and 3 are sequence diagrams showing transmission and reception of a call signal (voice signal), a polling signal, and emergency information of a train in the wireless section of the train radio system shown in FIG.
6 and 7 are denoted by the same reference numerals.

Reference numeral 23 denotes a case where the train l is the emergency transmitters 20a, 20
b, etc .; 24, call information of the train k output by the train k from the emergency transmitters 20a, 20b, etc .;
Reference numeral 6 denotes a speech signal between the central device 1 and the train l. Each signal in the wireless transmission section 12 is shown by a solid line (including a broken line).
Indicates a communication signal, and a dotted line indicates an emergency signal.

Next, the operation will be described. In FIG. 1, a voice signal, a control signal, and the like input from a control unit 7 of the central device 1 to a communication transmitter 3 are modulated into a radio frequency by the communication transmitter 3, and the communication radio signal 8 is transmitted by a transmission antenna. 4 is transmitted to the train radio devices 2a, 2b, etc. of the trains on the line. On the other hand, the communication radio signal 9 of each of the train radio devices 2a and 2b causes interference if the plurality of train radio devices 2a and 2b and the like output at the same time.
Therefore, the train radio devices 2a, 2b, etc. determine the control signals (polling signals, etc.) sent from the central device 1 in the control units 7a, 7b, and determine whether or not their own devices can transmit.

In the train radio equipment 2a, 2b, when an emergency occurs, emergency information is transmitted from the control units 7a, 7b to the emergency transmitters 20a, 20b and the emergency transmission antennas 21a, 2b.
The signal is transmitted to the central unit 1 as an emergency radio signal 22 via 1b. The emergency radio signal 22 enters the control unit 7 via the emergency receiving antenna 19 and the emergency receiver 18.
In the above, the emergency radio signal 22 from the train is usually extremely infrequent compared to the speech radio signal 9, and there is almost no possibility of interference with other trains. Can be.

FIGS. 2 and 3 show an example of a signal transmission sequence in the above configuration.

[0020] At a time of non-call between the central unit 1 one each train 2, the central unit 1 a train 1, the train 2, ... to sequentially polling signal 13a with a period T _1, and transmits the 13b like poll . Each polled train returns answer signals 14a, 14b, etc. for the polling. The information included in the answer signals 14a and 14b differs depending on the system, and includes train location information, train failure information, and the like.

Now, when a polling signal and an answer signal are sequentially transmitted and received in the order of train 1, train 2,. Is transmitted to the central unit 1 with the call information included in the answer signal 14c. As a result, a call between the central apparatus 1 and one train k is started by the call voice signal 15. At the same time, polling is suspended. If emergency emergency information occurs on another certain train (train 1 in the figure) during this call, the train 1 transmits the emergency information 23 to the central device 1 as an emergency signal using the emergency transmitter 20a or the like. I do. At this time, if necessary, the central device 1 can perform an operation such as interrupting the call voice signal 15 and switching to the call voice signal 16 with the train l.

FIG. 3 is an example in which an emergency signal in FIG. 2 is used for train call information. In FIG. 3, when a polling signal 13c and its answer signal 14c are transmitted and received between one train m of the central device 1 and a call request is generated in the train k, the train k immediately uses the emergency system transmitter 20a and the like. And transmits the train k call information 24. As a result, a call between the central apparatus 1 and one train k is started by the call voice signal 15, and at the same time, the polling is interrupted.

In the above embodiment, each train radio device 2
The emergency transmitters 20a and 20b and the antennas 21a and 21b are provided separately from the communication system in FIGS.
And the transmitters 25a and 25b and the antennas 26a and 26 for both communication and emergency systems having a transmission frequency switching function.
b, and the control units 7a and 7b output the transmission frequency switching control signals 27a and 27b to the communication / emergency transmission transmitters 25a and 25b, respectively.
It is also possible to transmit the communication radio signal 9 and the emergency radio signal 22 while switching the transmission frequencies a and 25b.

[0024]

As in the above, according to the present invention, Poli According to the present invention
In a train radio communication system that performs polling in the polling system, in addition to two signals of a duplex system for speech communication, one signal of an emergency system from a train is added as a radio signal, and these three signals are controlled by one control. The emergency information from each train can be transmitted without delay during a call or polling, and the train call information is transmitted in an emergency system so that the train and the central unit can be transmitted immediately. It is possible to make an operation in which the emergency system and the communication system are linked to each other. According to the present invention,
For example, while performing call communication by polling method,
To call with the train on the line that sent the emergency without delay.
The response can be changed, for example, the conventional polling
A system that can communicate only with the system, a communication system and an emergency system
Compared to a completely separate system
Also make emergency calls equally with the minimum necessary emergency communication equipment
Can respond. In addition, emergency wireless
Emergency information to make an emergency call,
Configure the system to use call-based radio for emergency calls.
Polling method as usual
Calls can be made using the polling method.
Without deteriorating the rolling cycle, etc.
Also minimizes the number of components required for the system.
Be able to respond immediately in emergency situations
The system can be configured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a train radio communication system according to an embodiment of the present invention.

FIG. 2 is a sequence diagram of signal transmission of the system.

FIG. 3 is a sequence diagram of another signal transmission of the system.

FIG. 4 is a configuration diagram of a train radio communication system according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional train radio communication system.

FIG. 6 is a sequence diagram of signal transmission of the system.

FIG. 7 is a sequence diagram of another signal transmission of the system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central apparatus 2a, 2b Train radio apparatus 3, 3a, 3b Communication system transmitter 4, 4a, 4b Communication system transmission antenna 5, 5a, 5b Communication system receiver 6, 6a, 6b Communication system reception antenna 7, 7a, 7b Control unit 8, 9 Communication radio signal 10 Central unit control 11 Train control 12 Radio transmission section 13a, 13b, 13c Polling signal 14a, 14b, 14c Answer signal 15, 16 Communication voice signal 18 Emergency receiver 19 Emergency system Receiving antenna 20 Emergency transmitter 21 Emergency transmitting antenna 22 Emergency radio signal of train 23 Train l emergency information 24 Train k calling information In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

(57) [Claims] 1. A central unit for a portable telephone at a predetermined frequency.
Call each train on the train in sequence, and if necessary
By making a call between the train and the central unit,
When a radio call is made between the central unit and a plurality of trains on the train
In each case, each train on the train has a call system used for the wireless call.
Emergency call with radio frequency different from radio signal
Providing a transmission means for transmitting an emergency radio signal including information,
The central unit has a receiver for receiving the emergency radio signal.
By providing a step, the wireless communication destination of the central device can
Switching to a train on the line that transmitted the normal radio signal
Train radio communication system. 2. The transmission means according to the outgoing call information has no emergency system.
Claims: It is possible to transmit a line signal.
1. The train wireless communication system according to 1.