JP2001313600A - Communication system for emergency notice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a start system for a transmitter adopted when a duplex system emergency notice unit and a simplex system wireless unit are connected and to avoid the effect of malfunction due to surrounding noise or the like. SOLUTION: Adopting a voice start system can eliminate the need for a modification cost for the start system of the transmitter. Furthermore, as to malfunction due to noise or the like for voice start, the one simplex wireless unit is used exclusively for transmission and the other simplex wireless unit is used exclusively for reception only on the emergency notice so as to change the half-duplex system into the duplex system to solve the malfunction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system for emergency notification in a mobile communication system.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional technique. In the figure, the radio equipment 4 or 5 of the on-board station 1 is of a duplex system, and a plurality of emergency notification devices 2 are connected to a driver's seat interphone 3. Normally, when a call is made from the emergency caller in the cabin, the buzzer (B
Z) sounds and the crew can answer and talk. At this time,
If the crew cannot respond to the call from the passenger due to sudden illness or absence, the timer circuit 6 operates, the relay R7 operates after a fixed time, the transmitter 10 is activated, and the calling voice is transmitted to the base station 13. The data is transmitted to the central device 14 via the communication device.

[0003] In the central unit 14, since the speaker rings, the commander responds with the handset. Further, the base station 13 is activated by the hook-off, and the response voice is transmitted to the radio 4
And output from the speaker of the intercom 3.

At the end of the call, a call end signal is transmitted by the commander on-hook, received by the receiver of the train 1 via the base station 13, and the relay R7 is restored.

[0005]

In the above-described conventional system, the following problem occurs when the radio of the train is a simplex system. First of all, there is no function to activate the radio only at the time of interphone transmission, which is inconvenient. If this was repaired, there was a problem that the cost would be high, including the addition of service lines in the vehicle. Secondly, when the transmitter is activated by voice detection, if noise comes from the interphone, the transmitter is continuously transmitted, and there is a problem that the voice of the commander cannot be received.

[0006]

According to the present invention, in order to solve the first problem, a transmitter is activated by voice detection. Further, in order to solve the second problem, one of the simplex radios is dedicated to transmission and the other is dedicated to reception, so that the voice of the commander can be received even during transmission.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 1 is a train, 2 is an emergency call device, 3 is an intercom for crew members, 4 is a radio device that is dedicated to transmission only for emergency reports, 5 is a radio device that is dedicated to reception only for emergency reports, and 6 is a timer. The circuit has a function to connect to the radio when there is no response for a certain time when the intercom is called from the emergency call device. A relay 7 controls the connection between the emergency report device and the radio. A relay 8 switches a receiving circuit of the wireless device 5. Reference numeral 9 denotes a voice detection circuit which activates the transmitter 10 when voice is detected. Reference numeral 10 is a transmitter, 11 is a transmission / reception switching relay, 12 is a receiver, 13 is a base station apparatus and has the same transmission system, and 14 is a command center facility.

Next, the operation of this embodiment will be described.
When the call button is pressed from the emergency call device 2, the BZ (buzzer) of the intercom 3 sounds. At this time, if the crew answers with the interphone 3, the call can be made as it is.
Here, when the crew cannot respond with intercom 3,
The timer circuit 6 operates, and after a predetermined time, the relay 7 is operated. When the voice from the emergency reporter is detected by the voice detection circuit 9, the transmitter 10 is activated and the transmission / reception switching relay 11 is switched to the transmitter side.

The voice is sent from the train by radio to the command station 14 via the base station 13 and sounds the speaker, so that the commander responds with the handset. Handset off-hook 12
Then, the base station 13 is transmitted, and the voice of the commander is received by the receiver 12 of the reception-only wireless device 5 and the speaker of the emergency call device 2 is sounded. In this way, a stable call can be made between the passenger and the dispatcher in an emergency.

[0010]

As described above, according to the present invention, even if a simplex type radio is used, the radio can be set for transmission only and reception only. , Without the need for a new line in the vehicle,
It is economical because there is no need to add a press button to the emergency call device. Furthermore, even if a continuous transmission state occurs due to a voice malfunction due to noise in the vicinity of the emergency call device, the voice from the commander can be received by the receiving-only radio, so that the call can be stably continued.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a conventional system.

[Explanation of symbols] 1: train, 2: emergency caller, 3: interphone, 4:
A wireless device that is dedicated to transmission only during an emergency call, 5: A wireless device that is dedicated to receiving only during an emergency call, 6: a timer circuit, 7,
8: Emergency call connection relay, 9: Voice detection circuit, 10: Transmitter, 11: Transmission / reception switching relay, 12: Receiver, 13: Base station, 14: Command station.

Claims (1)

[Claims] A wireless line is formed between a plurality of mobile stations, each of which has a simplex wireless device mounted in front and back of a plurality of connected moving bodies, and a base station arranged along a railway, and a base station and a wired network. In a mobile communication system that communicates wirelessly with a command console connected by 2 and a half-wave duplex, when a driver calls by an emergency reporter in a passenger room and an intercom in a driver's seat and calls by an emergency report that performs a duplex call, A communication method for connecting the interphone to the radio and communicating with the command desk when a state in which the interphone cannot be answered occurs. One radio is dedicated to transmission and the other is dedicated to reception. Emergency call, characterized in that the radio was activated by detecting the sound of the emergency call device without the radio start function, and the other radio was able to receive continuous transmission due to malfunction due to ambient noise etc. Communication method.