JP2001054159A - Train radio communication system, and method for switching railroad section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a train radio communication system excellent in operability and high in safety by preventing a human errors caused in manual operations for switching railroad sections. SOLUTION: When an on-train element 7 forming a switching point transmission means with on-ground elements receives a signal denoting a railroad section sent by the on-ground elements 12a, 12b to recognize a railroad switching point, a mobile station CPU 5 and a synthesizer 4 forming a frequency changeover means automatically change a radio frequency of a mobile station 1 into a radio frequency of a next railroad section and also railroad data used for data transmission into new information to execute the switching of the railroad section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train radio system for switching a transmission / reception frequency of a mobile station to a frequency corresponding to the line section when the line section is changed, and to a line section switching method. .

[0002]

2. Description of the Related Art FIG. 6 is a system configuration diagram showing a conventional train radio system. In the figure, 1 is a mobile station, 2 is a mobile station terminal, 3 is a mobile station transceiver, 4 is a synthesizer for setting the radio frequency of the mobile station transceiver 3, 5
Is a mobile station CPU for generating a frequency switching signal for the synthesizer 4, and 6 is a switch for giving line section information to the mobile station CPU 5.

Next, the operation will be described. In the train radio system, when a train changes a line section, it is necessary to perform line section switching for updating the radio frequency of the mobile station transceiver 3 to a radio frequency corresponding to the line section. In the conventional train radio system, a driver visually recognizes a line segment switching point which is a branch point of a line segment, and manually operates the switch 6 to select a corresponding line segment. When the switch 6 is operated, the mobile station CPU 5 transmits a line switching signal to the synthesizer 4 to instruct the synthesizer 4 to change the radio frequency to a frequency corresponding to the line selected by the switch 6. Synthesizer 4 receiving this line switching signal
Changed the frequency of the mobile station transceiver 3 to the radio frequency of the line section, and executed the line section switching.

[0004]

Since the conventional train radio system is configured as described above, line switching is performed by manual switching of the switch 6 by the driver, and operability is poor. In addition, when switching line sections, human errors such as erroneous operations may occur, and there is a problem that safety is low.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and improves operability and security by automatically switching line sections, and also changes information for data communication. To obtain a train radio system and a line section switching method.

[0006]

SUMMARY OF THE INVENTION A train radio system according to the present invention includes a switching point transmitting means for recognizing a line switching point (line branching point) and a radio frequency of a mobile station for the next line section. It is provided with frequency setting means for setting a radio frequency.

[0007] In the train radio system according to the present invention, the switching point transmitting means is formed of a ground child and a vehicle child, and wireless communication is performed between them to notify the frequency setting means of the running line section. It is like that.

In the train radio system according to the present invention, the switching point transmitting means is formed by a sign post and a receiver,
The wireless communication is performed between them, and the line switching signal transmitted by the sign post is notified to the frequency setting means.

[0009] The train radio system according to the present invention provides a leaky coaxial cable (hereinafter referred to as LC) from a sign post to a receiver.
X) to supply a line switching signal.

[0010] In the train radio system according to the present invention, a radio wave transmitted from a sign post is received by a monitor receiver and the state thereof is monitored.

[0011] In the train radio system according to the present invention, when the radio frequency of the mobile station is set by the frequency setting means, the line section data indicating the existing line section is also set at the same time. .

A line section switching method according to the present invention determines whether or not line switching is to be performed based on a signal representing a line section obtained by a switching point transmitting means and a radio frequency currently in use, and determines whether a line section is switched. The setting of the radio frequency of the mobile station is changed by the frequency setting means, and the setting of the line section data is also changed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a system configuration diagram showing a train radio system according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a mobile station mounted on a train for switching line sections, and reference numeral 2 denotes a mobile station terminal such as a telephone connected to the mobile station 1. Reference numeral 3 denotes a mobile station transceiver of the mobile station 1, reference numeral 4 denotes a synthesizer for changing the radio frequency setting of the mobile station transceiver 3, and reference numeral 5 denotes a frequency for instructing the synthesizer 4 to change the radio frequency setting. It is a mobile station CPU that generates a switching signal. The synthesizer 4 and the mobile station CPU 5 form a frequency setting means for setting the radio frequency of the mobile station transceiver 3 to the radio frequency of the running line section. Reference numeral 7 denotes an on-board child that performs wireless communication with a ground child to be described later and notifies the mobile station CPU 5 of a running line segment, and recognizes a line segment branch point (line segment switching point) together with the ground child. Switching point transmission means for the transmission.

Reference numeral 8 denotes a fixedly arranged base station. In the base station 8, reference numeral 9a denotes a base station transceiver for performing wireless communication with the mobile station transceiver 3 of the mobile station 1 located on the line section A. , 9
Reference numeral b denotes a base station transceiver that performs wireless communication with the mobile station transceiver 3 of the mobile station 1 located on the line section B. Reference numeral 10 denotes a central device that controls the plurality of base stations 8, and reference numeral 11 denotes a command console connected to the central device 10. 12a and 12b are installed near the line branch point on the track, and
And a radio signal for transmitting a signal indicating a line section to the vehicle child 7. A switching point transmitting means is formed by these ground elements 12a and 12b and the vehicle element 7.

Next, the operation will be described. Here, in this train radio system, a radio frequency to be used is assigned to each line section. In the example shown in FIG. 1, the radio frequency f _a1 and f _a2 are allocated to the line section A, and the radio frequencies f _b1 and f _b2 are allocated to the line section B. In the base station 8 in which a plurality of line sections are included in the wireless communication area, the base station transceivers 9a and 9b in which the radio frequencies assigned to the respective line sections are set are installed, and the plurality of lines located in different line sections are located. It is configured to be able to communicate with the mobile station 1 of the train. That is, the base station 8 sets the transmission frequency to _fa1.
In reception frequency is f _a2 line section A dedicated base station transceivers 9a
And a base station transceiver 9b dedicated to line B having a transmission frequency of f _b1 and a reception frequency of f _b2 .

In order to communicate with the base station transceiver 9a, the mobile station 1 of the train located in the line section A sets the transmission frequency of the mobile station transceiver 3 to f _a2 and the reception frequency to f _a1. ing. On the other hand, in order to communicate with the base station transceiver 9b, the mobile station 1 of the train located in the line section B sets the transmission frequency of the mobile station transceiver 3 to f _b2 and the reception frequency to f _b1. I have. Therefore, when the train moves from one line section to another, it is necessary to change the setting of the radio frequency of the mobile station transceiver 3. Specifically, when the train running in the section A enters the section B, the transmission frequency of the mobile station transceiver 3 is changed from f _a2 to f _b2 ,
The reception frequency is changed from f _a1 to f _b1 . On the other hand, when the train running in the section B enters the section A, the transmission frequency of the mobile station transceiver 3 is changed from f _b2 to f _a2 and the reception frequency is set to f _a2 .
Change the setting from _b1 to _fa1 .

FIG. 2 is a flowchart of the line section switching method according to the first embodiment of the present invention. Next, the line switching of the train radio system will be specifically described with reference to FIG. In this case, the ground child 12a transmits a signal indicating the line section A, and the ground child 12b transmits a signal indicating the line section B.

For a train on line A, the mobile station 1 sets the radio frequency of the mobile station transceiver 3 to a dedicated one for line A having a transmission frequency f _a2 and a reception frequency f _a1. Wireless communication with the base station transceiver 9a. At this time, a signal indicating the line section A transmitted from the ground child 12a is received by the vehicle child 7 provided on the train (step ST1).
a). When receiving the signal from the ground terminal 12a, the mobile station CPU 5 determines whether or not the currently used radio frequency is assigned to the line segment B (step S).
T2a). In this case, the train is on line A, and the radio frequency of the mobile station transceiver 3 is dedicated to line A with the transmission frequency f _a2 and the reception frequency f _a1 . No changes are made. Thereafter, when the train passes through the line branch point and continues to travel in line A, the radio frequency is not changed, and the mobile station transceiver 3 has the transmission frequency f _a2 and the reception frequency f _a1 . Maintain the radio frequency dedicated to section A.

On the other hand, when the train enters the line section B at the line branch point, a signal indicating the line section B transmitted from the ground child 12b is received by the upper child 7 (step ST1b).
When the signal is received from the ground terminal 12b, it is determined whether or not the currently used radio frequency of the mobile station transceiver 3 is dedicated to the line A (step ST2).
b). In this case, since the train has entered from the section A to the section B, the radio frequency of the mobile station transceiver 3 is dedicated to the section A having the transmission frequency f _a2 and the reception frequency f _a1. I have. Therefore, the mobile station CPU 5 transmits a frequency switching signal to the synthesizer 4 and the mobile station transceiver 3
The transmission frequency is f _b2 and the reception frequency is f _b1
(Step ST3). Synthesizer 4 having received the frequency switching signal from mobile station CPU 5 changes the transmission frequency from f _a2 to f _b2.
And the reception frequency is changed from f _a1 to f _b1 (step ST4). In addition, in the case where the train location data is transmitted, for example, at the same time, the setting change from the route section A to the route section B of the data indicating the line section where the train is located is also performed.

The same applies to the case where a train running in the line section B enters the line section A from the line branch point.
That is, when a train is present on the line section B, the vehicle upper arm 7 receives a signal indicating the line area B transmitted from the ground child 12b (step ST1b), and the radio frequency in use is changed to the line area A. It is determined whether or not it is dedicated (step ST2b). In this case, the radio frequency is not changed because it is exclusively used for the line section B. When the train enters the section A and the upper child 7 receives the signal indicating the section A from the ground child 12a (step ST1a), it is determined whether the radio frequency in use is exclusive to the section B or not. A determination is made (step ST2a). In this case, since the radio frequency of the mobile station transceiver 3 is dedicated to the line section B, the mobile station CPU 5 transmits a frequency switching signal to the synthesizer 4 (step ST3), and the radio frequency of the mobile station transceiver 3 is changed. To section A
The setting is changed to a dedicated one (step ST4). Thereby, the mobile station terminal 2 and the command console 11 can continue the communication via the mobile station 1 and the base station 8.

As described above, according to the first embodiment,
It is possible to automatically change the radio frequency of the mobile station transmitter / receiver 3 and execute line segment switching, thereby improving operability and security, and at the same time, data communication information ( (Line section data) can be changed.

Embodiment 2 FIG. FIG. 3 is a system configuration diagram showing a train radio system according to Embodiment 2 of the present invention. The same or corresponding parts are denoted by the same reference numerals as in FIG. 1 and description thereof is omitted. In the figure, reference numerals 13a and 13b denote sign posts which are installed near a line segment branch point on the track and transmit a line segment switching signal, and 14 performs radio communication with the sign posts 13a and 13b to receive the sign posts. This is a receiver for notifying the mobile station CPU 5 of a line section switching signal.
In the second embodiment, the sign posts 13a, 13
Embodiment 2 is different from Embodiment 1 in that a switching point transmitting means for recognizing a line segment branch point (line segment switching point) is formed by b and the receiver 14.

Next, the operation will be described. Here, the basic operation is the same as that of the first embodiment. In this case as well, the mobile station transceiver 3 of the mobile station 1 sets its radio frequency to a dedicated radio frequency for the line section where the train is located. Thus, wireless communication is performed with the base station transceiver 9a (or the base station transceiver 9b). The mobile station CPU 5 recognizes the line branch point from the line switching signal received by the receiver 14 from the sign post 13a (or the sign post 13b), and the traveling line is changed from the line A (or the line B). When it is known that the mobile station has moved to the section B (or the section A), the synthesizer 4 changes the currently used radio frequency from the dedicated radio frequency of the section A (or the section B) to the section B (or the line A). District A) Instruct to switch to the dedicated one.

As shown in FIG. 3, the combination of the sign posts 13a and 13b and the receiver 14 may be used as the switching point transmitting means, and the vehicle upper child 7 and the ground child 12a and 12b are used. An effect similar to that of the first embodiment is obtained.

Embodiment 3 FIG. 4 is a system configuration diagram showing a train radio system according to Embodiment 3 of the present invention. The same or corresponding parts are denoted by the same reference numerals as in FIG. 3 and description thereof is omitted. In the figure, reference numeral 15 denotes the sign posts 13a, 13b in order to stably supply the electric field of the line segment switching signal transmitted from the sign posts 13a and 13b.
b is an LCX of a certain length, each connected to b. The third embodiment differs from the third embodiment in that the switching point transmitting means for recognizing the line segment branch point is formed by the sign posts 13a and 13b to which the LCX 15 is connected and the receiver 14. 2 and different.

Next, the operation will be described. The operation of the train radio system according to the third embodiment is the same as that of the second embodiment.
Is basically the same as However, in this case, the sign posts 13a and 13b do not radiate the line switching signal directly to the air, but supply them to the LCX 15 having a certain length.
Since the line section switching signal is radiated through the LCX 15 connected to the sign posts 13a and 13b, the LCX
In the laying section 15, the electric field becomes almost uniform, and the receiver 14
Can receive a line switching signal with a stable electric field in that section.

As described above, according to the third embodiment,
Since the line switching signal can be supplied by the LCX 15 in a certain section with a stable electric field, the line switching signal is not undetected by the receiver 14, and line switching can be performed more reliably. The effect that it can be obtained is obtained.

Embodiment 4 FIG. 5 is a system configuration diagram showing a train radio system according to Embodiment 4 of the present invention. The same or corresponding parts are denoted by the same reference numerals as in FIG. 3 and description thereof is omitted. In the figure, monitors 16a and 16b are arranged near the sign posts 13a and 13b and connected to the base station 8, and monitor the state (electric field) of the radio wave of the line switching signal transmitted from each sign post 13a and 13b. It is a receiver. In the fourth embodiment, the sign posts 13a, 13b are used by the monitor receivers 16a, 16b.
The third embodiment differs from the second embodiment in that the transmission radio wave from 13b is monitored.

Next, the operation will be described. Again,
The basic operation is the same as that of the second embodiment. In the train radio system according to the fourth embodiment, the line section switching signals transmitted from sign posts 13a and 13b are received by corresponding monitor receivers 16a and 16b, respectively.
The state of the transmission radio wave at each of the sign posts 13a and 13b is monitored. The monitor receivers 16a and 16b transmit an alarm signal to the base station 8 when a certain received electric field cannot be obtained from the corresponding sign posts 13a and 13b. The base station 8 transmits the received alarm signal to the command console 11 via the central device 10. This makes it possible for the command console 11 to predict that the mobile station 1 has not detected the line section switching signal.

As described above, according to the fourth embodiment,
Since the radio wave state of the line switching signal can be monitored on the ground side (command console 11), the reliability of the line switching is improved, and the mobile station 1 is flexible even when the line switching signal is not detected. And the like.

[0031]

As described above, according to the present invention, when a line segment switching point is recognized by the switching point transmitting means,
Since the frequency setting means is configured to set the radio frequency of the mobile station to the radio frequency of the next line segment, line segment switching is automated, and human error such as erroneous operation at the time of line segment switching occurs. There is no room, the operability can be improved, and a train radio system that can enhance safety can be obtained.

According to the present invention, as the switching point transmitting means, a grounding element for transmitting a signal indicating a line section and an on-board element for receiving the signal and notifying the frequency setting means of the running line area are provided. Since it is configured to be used, there is an effect that it is possible to easily realize improvement in operability and safety by automating line switching.

According to the present invention, as the switching point transmitting means, the sign post for transmitting the line switching signal and the receiver for receiving the signal and notifying the frequency setting means are used. There is an effect that operability and safety can be easily improved by automation of switching.

According to the present invention, the sign post is
Since the line switching signal is configured to be transmitted via X, the line switching signal can be supplied with a stable electric field,
There is an effect that line switching can be performed more stably.

According to the present invention, since the radio wave transmitted by the sign post is received by the monitor receiver and its status is monitored, it is possible to predict that the mobile station has not detected the line switching signal. In addition, there is an effect that it is possible to flexibly cope with a case where it is difficult to switch line sections.

According to the present invention, when the radio frequency is set, the line section data is set at the same time, so that when the line point switching point is recognized by the switching point transmitting means, the radio frequency of the mobile station is set. Since the line section data is changed together with the change, there is an effect that data communication of position information can be supported.

According to the present invention, it is determined whether or not line switching is to be performed based on a signal indicating a line and the currently used radio frequency. Since it is configured to change and also to change the setting of line data, it is possible to automate line switching, improve operability, improve safety, and improve location information data. There is an effect that a line section switching method that can support communication can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an execution procedure of line segment switching according to the first embodiment.

FIG. 3 is a system configuration diagram showing a train radio system according to a second embodiment of the present invention.

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

FIG. 5 is a system configuration diagram showing a train radio system according to a fourth embodiment of the present invention.

FIG. 6 is a system configuration diagram showing a conventional train radio system.

[Explanation of symbols]

1 mobile station, 4 synthesizer (frequency setting means), 5
Mobile station CPU (frequency setting means), 7 upper vehicle (switching point transmitting means), 12a, 12b ground carrier (switching point transmitting means), 13a, 13b sign post (switching point transmitting means), 14 receiver (switching point transmitting means) Transmission means), 15 LCX, 16a, 16b Monitor receiver.

Claims (7)

[Claims] 1. A train radio system for performing line section switching for changing a transmission / reception frequency of a mobile station to a radio frequency corresponding to a line section when a line section is changed, wherein a line section switching point which is a branch point of the line section is set. Switching point transmitting means for recognizing, and frequency setting means for setting a radio frequency of the mobile station to a radio frequency of a next traveling line section when it is determined that the line section is a switching point. A train radio system characterized by the following. 2. A switching point transmitting means for transmitting a signal indicating a line section and a signal indicating a line section transmitted from the ground element and receiving the signal indicating the line section as frequency setting means. The train radio system according to claim 1, wherein a car child for notification is used. 3. As a switching point transmitting means, a sign post for transmitting a line switching signal and a receiver for performing wireless communication with the sign post and notifying the frequency setting means of a received line switching signal are used. The train radio system according to claim 1, wherein 4. The train radio system according to claim 3, wherein a leaky coaxial cable is connected to the sign post, and a line switching signal is supplied to the receiver from the leaky coaxial cable. 5. The train radio system according to claim 3, further comprising a monitor receiver for receiving a transmission radio wave from the sign post and monitoring the state. 6. When the radio frequency of the mobile station is set to the radio frequency of the next line segment by the frequency setting unit when the line segment switching point is recognized by the switching point transmitting unit, the existing line segment is set. The train radio system according to claim 1, wherein the setting of the line section data to be represented is performed at the same time. 7. A line switching method for switching a transmission / reception frequency of a mobile station to a radio frequency corresponding to a line when a line is changed, wherein the signal representing the line obtained by the switching point transmitting means is used at present. Judgment as to whether or not to switch the line segment from the radio frequency, and if it is recognized that the line segment has been changed, the frequency setting means automatically changes the radio frequency of the mobile station to the radio frequency of the next line segment And a line segment switching method characterized in that the line segment data representing the line segment where the line is located is changed to the line segment data of the next line segment.