JPH03117228A - Radio message transmission system in train - Google Patents

Abstract

PURPOSE:To satisfy the request by a passenger while utilizing the frequency band effectively by providing a message transmission/reception station and a relay station or the like as ground system installation and providing a radio selective call receiver with display function or the like as train system installation. CONSTITUTION:When an in-train paging system is used, a radio selective call receiver with display function 25 registered by a message transmission/reception station 10 of the ground system and provided with a registration number is received by a person by a rental method or the like and the person gets on the train. In this case, the registration number or the like is informed in advance to an opposite party of a contact on emergency. When a message is sent from an external person to the passenger, a desired message is delivered to the station 10, a call signal is sent in a radio wave from the station 10 via each relay station 12, the receiver 25 possessed by the relevant passenger is brought into the receiving state via a message transmitter 23 in the train, the message is received and displayed. Moreover, when the message is sent from the passenger to a device at the outside of the train, the message is sent in a radio wave via a message transmitter-receiver 21 or the like and delivered to the station 10, and then the message is delivered to the opposite party by using a conventional information transmission network.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an in-train wireless message transmission system capable of transmitting messages to passengers on a train from the outside and from inside the train to people outside.

(Prior Art) As is well known, the method conventionally implemented as a means of communication between train passengers and the outside world is a method in which a radio line is established between a ground telephone line and a train. In other words, when a person on the ground wants to talk to a passenger on a train, it is normal to call a crew member by telephone over a wireless link to the train, and then use the audio broadcast inside the train to call the passenger and have them answer the phone. be.

(Problems to be Solved by the Invention) However, the conventional system described above has the following problems.

In other words, there are various wireless systems that connect trains and the ground, and the number of telephone lines that can be used is also increasing, but due to restrictions on radio frequency bands, it is currently not at a level that can fully meet the demands. do not have.

Therefore, in the current situation where the number of telephone lines between the ground and the train is limited, it is inconvenient that it takes time to transmit a simple message when there are many calls.

A similar problem occurs when a passenger wishes to contact someone outside the train.

The present invention was created in view of these problems, and its purpose is to improve the effectiveness of the frequency band by focusing on the function of a paging system (radio selective calling system) that can transmit messages to many people in a narrow band. The purpose of the present invention is to provide an in-train wireless message transmission system that can meet the needs of passengers while making the most of the traffic.

(Means for Solving the Problems) In order to achieve the above object, the in-train wireless message transmission system of the present invention has the following configuration.

That is, the in-train wireless message transmission system of the present invention:
Comprised of ground system equipment and train system equipment; the ground system equipment includes a wireless or wired transmission line formed along a railway track; and at least one message transmitting/receiving message signal with the transmission line. Transmitting/receiving station;
a relay station arranged at appropriate intervals in the middle of the transmission path and configured to wirelessly transmit message signals taken in from the transmission path and to send message signals received wirelessly to the transmission path; a message transmitter/receiver that distributes and outputs the message signal received by radio to each vehicle of the train and transmits the received message signal wirelessly; The present invention is characterized by comprising: a message transmitter that transmits wirelessly; and a wireless selective calling receiver with a display function that receives message signals wirelessly transmitted in a vehicle.

(Function) Next, the function of the in-train wireless message transmission system of the present invention configured as described above will be explained.

As is well known, various paging systems have been developed and are currently in practical use, such as systems that simply call the other party and systems that can send messages to the other party, but when applied to long-distance trains, etc. Currently, regional independence is strong, making it unsuitable. Furthermore, since radio waves are highly shielded inside trains, this poses a problem when used for passengers on trains whose positions and directions change. If only the call information is transmitted by sound or the like, the information must be sent and received by telephone, which does not solve the problem in a situation where the number of lines between the train and the ground is limited.

Therefore, in the present invention, we focused on the function of a paging system that can transmit messages, and installed ground system equipment along railway tracks.In the train system, message signals are transmitted in the form of radio waves in each vehicle. The messages will be broadcast so that passengers can view the messages from their seats. In other words, we were able to construct an in-train paging system.

Thus, according to the present invention, matters that are urgent and whose key points can be encoded and transmitted, such as notification of a change in meeting time at the destination, instruction to change the destination, and other YES or N
This means that information can be easily and quickly communicated both inside and outside the train so that mutual decisions can be made just by using o.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an in-train wireless message transmission system according to an embodiment of the present invention. In FIG.
Ground system equipment (Fig. 1 (a)) arranged along the
It consists of train-related equipment (Fig. 1(b)) formed on the train.

In FIG. 1(a), reference numeral 10 denotes a terrestrial message transmitting/receiving station, and this message transmitting/receiving station IO serves as a gateway station for messages from or to the outside of the system. 11, 12, and 13 indicate a system for transmitting signals along the railway track. 11 is a transmission line, which can be either wired or wireless. 12 is a system that relays and distributes signals, and transmits and receives wireless signals to and from trains. It is a relay station that performs the following operations, and is equipped with an antenna I3.

In the illustrated example, the message transmitting/receiving station IO is provided at one end of the transmission line 11, but it goes without saying that it may be placed anywhere on the transmission line 11, or a plurality of them may be placed. Furthermore, the message transmitting/receiving station IO can not only transmit and receive messages to and from the transmission line 11, but also transmit and receive message signals wirelessly to and from trains, similar to the relay station 12. In short, it is sufficient to configure the structure according to the horizontally constructed system.

Further, in FIG. 1(b), 21 is a message transmitter/receiver, and this message transmitter/receiver 21 is connected to the antenna 20.
It is comprised of a wireless transmitter/receiver that wirelessly transmits and receives message signals to and from the above-mentioned ground equipment via the ground equipment, and a transmitter that distributes and outputs the wirelessly received message signals to the transmission path 22 to each vehicle. Note that messages are transmitted from the train to ground equipment by passengers operating the message transceiver 21.

Next, 22, 23, and 24 are signal distribution systems within the train.
2 is a transmission line connecting each vehicle, 23.23. . . . are message transmitters placed in each vehicle.

Message transmitter 23, 23. ... relays and distributes signals in each vehicle, and connects antenna 2.
4 emits weak broadcast radio waves 26 into the vehicle. And 25, 25. . . is a wireless selective call receiver with a display function carried by a passenger in each vehicle, and this wireless selective call receiver with a display function W25, 25 . ... receives a broadcast wave 26 from a corresponding antenna 24, and if it is the calling number assigned to the receiver, it becomes a receipt and displays a message.

In the above configuration, a person who wishes to use the in-train paging system according to the present invention registers with the message transmitting/receiving station 10, receives a receiver 25 with a determined number by a method such as rental, and gets on the train. At this time, the passenger notifies the person with whom emergency contact is required of the registration number, etc. in advance.

A person wishing to send a message to a passenger from outside delivers the desired message to the message transmitting/receiving station IO, either in person or manually if the system exists independently. Then, the paging signal is first transmitted from the message transmitting/receiving station 10 to each relay station 12, so that each relay station 1
2 wirelessly transmits a calling signal. Trains that receive this call signal wirelessly broadcast it on weak radio waves inside each car.

As a result, if the five persons are on board the train, the receivers possessed by those persons enter the receiving state, and the message transmitted by the message transmitting/receiving station IO following the call signal is received by the train by radio. The message will be displayed on the receiver of the relevant passenger. That is, the passenger can receive the desired message while remaining in his or her seat.

In addition, messages from passengers to outside the train are transmitted wirelessly from the train by operating the message transmitter/receiver 21 provided in the train, and sent to the message transmitter/receiver station 10 of the ground system equipment.
convey messages to.

If the system exists independently, the message is transmitted from the message transmitting/receiving station IO to the other party using a normal terrestrial information transmission network with manual intervention.

As is clear from the above explanation, the message transmitting/receiving station l
0 is equipped with an automatic conversion device for each person's number in the ground paging system and the number in the train paging system according to the present invention, and if the message transmitting/receiving station IO and the ground paging system are connected, messages can be transmitted and received. Messages can be exchanged between the station IO and the outside of the system without requiring the above-mentioned manual intervention. This scheme is particularly useful when both the passenger and the external message sender/receiver are subscribers to a terrestrial paging system.

In other words, - the caller on the ground makes a call similar to a normal paging system call, the radio wave is received by the message transmitting/receiving station IO, and if there is a corresponding registration number for the in-train paging system, it is converted to that number. The in-train transmitter (21 in Figure 1 (b)) sends signals to the in-train paging system and sends messages from the train to the other party on the ground.
The message is transmitted to the destination on the ground by converting it to the number of the destination on the ground at the message transmitting/receiving station 10 and transmitting it to the transmitting station of the terrestrial paging system, and transmitting the message from the transmitting station of the terrestrial system. It's about communicating.

Although Figure 1 only shows a single system,
It is practical to connect a large number of such systems to form and operate a network. This can be achieved by connecting stations corresponding to the message transmitting/receiving stations 10 of each system with an information transmission network.

(Effects of the Invention) As explained above, according to the in-train wireless message transmission system of the present invention, messages can be transmitted inside and outside the train using a so-called paging system, so that passengers and people outside can easily - The necessary messages can be sent and received quickly, and the effect is that it is possible to respond to passenger requests while making effective use of the frequency band.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an in-train wireless message transmission system according to an embodiment of the present invention. lO...Message transmitting/receiving station, 11...
...Transmission line, 12...Relay station, 13.20.
...Antenna, 21...Message transmitter/receiver, 22...Transmission path, 23...Message transmitter, 24. Old antenna, 25...
...Radio selective calling receiver, 26...Broadcast radio waves.

Claims (1)

[Claims] Comprised of ground system equipment and train system equipment; the ground system equipment includes a wireless or wired transmission line formed along a railway track; and at least one message that sends and receives message signals to and from the transmission line. a transmitting/receiving station; a relay station disposed at appropriate intervals in the middle of the transmission path and wirelessly transmitting a message signal taken in from the transmission path, and transmitting a wirelessly received message signal to the transmission path; The train system equipment distributes and outputs the message signal received wirelessly to each vehicle of the train, and also transmits the received message signal wirelessly; a message transmitter/receiver provided in each vehicle and transmits the distributed message signal. An in-train wireless message transmission system comprising: a message transmitter that transmits wirelessly within the vehicle; and a wireless selective call receiver with a display function that receives message signals wirelessly transmitted within the vehicle.