JP2015139205A - Train radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train radio communication system that achieves the integration of radio base stations for communications of the train as a whole, and prevents on-train units excluding a head vehicle from becoming nonfunctional at a handover point.SOLUTION: The train radio communication system includes: on-train units 61a, 61b having train control units 63a, 63b for generating a piece of position information and controlling the speed of the train, and radio communication units 62a, 62b for transmitting the position information from the train control units 63a, 63b, respectively; radio base stations 5a-5h which are disposed within a radio train control range to communicate with the on-train units 61a, 61b; and ground control units 3A-3D that control the operation of the train based on the position information received via the radio base stations 5a-5h. The head vehicle and the rearmost vehicle of a train 6 have the on-train units 61a, 61b respectively. The radio communication units 62a, 62b of the on-train units 61a, 61b included in them synchronize their changeover timings for performing communication among the radio base stations 5a-5h.

Description

  The present invention relates to a train radio system.

  In a conventional train radio system, an on-board device mounted on a train communicates with a ground device to control the operation of the train. In such a train radio system, a plurality of radio base stations are used as ground devices, and the radio base stations to communicate with must be sequentially switched according to the movement of the train.

  For example, Patent Document 1 discloses on-vehicle control means for controlling a train and on-vehicle information control connected to the on-vehicle control means via an in-vehicle network for the purpose of smooth and reliable handover. Vehicle and a plurality of on-vehicle wireless communication means connected to the on-vehicle information control means and corresponding to wireless communication using a plurality of types of frequencies respectively used by a plurality of wireless base stations installed on the ground A system is disclosed.

JP 2011-166361 A

  However, according to the above conventional technique, when a train is located near a handover point between a plurality of radio base stations, a plurality of on-board radio stations in the train communicate with different radio base stations. Therefore, the radio base stations that communicate with the entire train are not unified, and there is a problem that the communication of the following vehicle is interrupted, and that end replacement and backup cannot be performed quickly.

  This invention is made in view of the above, Comprising: It aims at obtaining the train radio system which can unify the radio base station which communicates as the whole train.

  In order to solve the above-described problems and achieve the object, the present invention is a train radio system that wirelessly controls the operation of a train in a radio train control section on a track, From the train control unit that generates the position information of the train based on the ground element information and the train speed detected by the train, and controls the train speed by checking the train speed with a speed check pattern, and the train control unit An on-vehicle device having a wireless communication unit for transmitting the position information, a plurality of wireless base stations arranged in the wireless train control section and communicating with the wireless communication unit of the on-vehicle device, and the wireless base station A plurality of ground control devices that receive the location information via the location information and control the operation of the train based on the location information, and the first and last vehicles of the train each have the on-board device. And the column When the wireless base station with which the wireless communication unit of the onboard device of the leading vehicle communicates at the handover point is switched, the wireless communication unit of the onboard device of the last vehicle of the train also communicates The radio base station is switched.

  According to this invention, there exists an effect that it is possible to unify the wireless base station which communicates as the whole train.

FIG. 1 is a diagram illustrating a configuration of a train radio system according to an embodiment. FIG. 2 is a diagram illustrating a vehicle equipped with an on-board device connected by a communication line to which the train radio system according to the embodiment is applied. FIG. 3 is a diagram for explaining the operation of the train radio system when the train of the train radio system according to the embodiment operates beyond the handover point (HO point).

  Hereinafter, embodiments of a train radio system according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a configuration of an embodiment of a train radio system according to the present invention. FIG. 1 shows an on-line management device 1, a train radio system network 2, ground control devices 3A to 3D, base networks 4A to 4D, radio base stations 5a to 5h, a train 6, and a track 7.

  The standing line management device 1 is a device that manages the ID of the onboard device 61a or the onboard device 61b of the leading vehicle of the train 6 in the train radio system, and backs up the base devices included in the ground control devices 3A to 3D. Yes, it is used when this base unit fails and restarts. Although not shown, the standing line management apparatus 1 includes a system management apparatus.

  The train radio system network 2 is an entire network in the radio train control section, and connects the on-line management device 1 and the ground control devices 3A to 3D.

  One ground control device 3A to 3D is provided at each base, and in the area of each base, the on-board device 61a provided in the head vehicle of the train 6 or the radio communication unit 62a in the on-board device 61b or the radio communication This device tracks the current position of the train 6 based on the position information received from the unit 62b, and performs interlock control, train interval control, and the like. Ground control devices 3A to 3D include a base terminal and a base device.

  The base networks 4A to 4D are networks provided for each base, and connect the base devices included in the ground control devices 3A to 3D and the radio base stations 5a to 5h. For example, when the train 6 travels from the base A side to the base D side, if the radio communication unit 62b in the vehicle 60b of the train 6 exceeds the handover point (HO point), the radio beyond the point A train control message (A → B message) and a train position information message (B → A message) are transmitted and received via the base station. The ground control devices 3 </ b> A to 3 </ b> D recognize the position information of the wireless communication unit 62 b as “train position information” and perform two-way communication with the train 6 via the wireless base stations 5 a to 5 h corresponding to the existing position of the train 6. Do. When the wireless communication unit 62b in the vehicle 60b of the train 6 exceeds the handover point (HO point), the train control message (A → B message) and the train position information message (B → A message) are transmitted via the wireless base station before the point is exceeded. ) Cannot be sent or received.

  The track 7 is a track on which the train 6 operates. The operation of the train 6 is controlled by the train radio system shown in FIG. Although not shown, a position correction ground element may be installed on the track 7.

  The wireless base stations 5a to 5h communicate with the wireless communication unit 62a or the wireless communication unit 62b of the onboard device 61a or the onboard device 61b provided in the leading vehicle of the train 6. The wireless base stations 5a to 5h are assigned unique IDs (ID1 to ID8), respectively. The frequencies used for communication by the radio base stations 5a to 5h are fixed, and the frequencies of adjacent base stations are different.

  In FIG. 1, four frequencies (f1 to f4) are illustrated as frequencies used by the radio base stations 5a to 5h for communication, and the radio base stations 5a to 5d are assigned f1 to f4 in this order, The base stations 5e to 5h are assigned f1 to f4 in this order. f1, f2, f3, and f4 have different frequencies.

  The train 6 includes a vehicle 60a and a vehicle 60b at both ends. The vehicle 60a includes an on-board device 61a, and the vehicle 60b includes an on-vehicle device 61b. The on-board device 61 a and the on-board device 61 b can communicate with each other via the communication line 68. When the train 6 travels from the base A side to the base D side, the vehicle 60b is the leading vehicle and the vehicle 60a is the tail vehicle. When the train 6 travels from the site D side to the site A side, the vehicle 60a is the first vehicle and the vehicle 60b is the last vehicle.

  FIG. 2 is a diagram showing a configuration of an embodiment of a vehicle equipped with an on-board device connected by a communication line to which the train radio system of the present invention is applied. FIG. 2 shows vehicles 60 a and 60 b equipped with on-board devices 61 a and 61 b connected by communication line 68. Here, the vehicle 60a is the leading vehicle and the vehicle 60b is the last vehicle. The onboard devices 61a and 61b communicate with the radio base stations 5a to 5h, and include radio communication units 62a and 62b including radio frequency control units 620a and 620b, train control units 63a and 63b that control the operation of the train 6, Position detectors 64a and 64b that detect the position of the train 6 and output the train 6 to the train controller 63a.

  Note that FIG. 2 shows only the devices necessary for the description of the train radio system of the present invention, but it is noted that the vehicles 60a and 60b are actually equipped with other on-vehicle equipment.

  Here, an outline of the operation of the train radio system will be described. Here, although the on-board device 61a mounted on the vehicle 60a will be described, the operation of the on-board device 61b mounted on the vehicle 60b is the same. During operation of the train 6, the position detection unit 64 a detects the ID of the ground unit (not shown) installed on the track 7. The train control unit 63a calculates the travel distance from the reference position based on the speed information from the speed generator in the vehicle 60a with the position where this ID is detected as the reference position, and the train 6 on the track 7 Find the position. The position information 80 obtained by the train control unit 63a is output to the wireless communication unit 62a, and the wireless communication unit 62a that has received the position information 80 sets this information in a predetermined transmission frame. In addition to the position information 80, for example, an ID (train ID) for identifying each train is set in the transmission frame. And this transmission frame is transmitted to the wireless base stations 5a-5h according to the present position of the train 6 via the wireless communication part 62a. The radio base stations 5a to 5h that have received the transmission frame extract the position information 80 and the like, and the extracted position information 80 is one of the ground control devices 3A to 3D corresponding to the radio base station (for example, the radio base station If it is the station 5a, it is transmitted to the ground control device 3A).

  The ground control devices 3 </ b> A to 3 </ b> D detect the position of the train 6 that operates in the area managed by the own device, and exchange position information 80 with other ground control devices via the train radio system network 2. Based on the above, stop limit position information 81 is generated, and the stop limit position information 81 is transmitted to the radio base stations 5a to 5h. The radio base stations 5a to 5h set the stop limit position information 81 in the transmission frame and transmit it to the radio communication unit 62a. Information other than the stop limit position information 81 (for example, an ID (base station ID) for identifying each base station) is set in the transmission frame.

  In addition, the ground control devices 3 </ b> A to 3 </ b> D generate on-line management information from the position information 80 of the train 6 existing in its own area, and transmit it to the on-line management device 1 via the train radio system network 2. The standing line management apparatus 1 grasps the positions of all the trains that are in the wireless train control section based on this standing line management information.

  The radio communication unit 62a that has received the transmission frame from the radio base stations 5a to 5h extracts the stop limit position information 81 and transmits it to the train control unit 63a. The train control unit 63a generates a speed check pattern (a pattern signal indicating speed control characteristics) based on the stop limit position information 81, and checks the generated speed check pattern and speed information from the speed generator of the vehicle 60a. . When the speed information from the speed generator exceeds the speed check pattern, the train control unit 63a generates a brake command and transmits it to the brake control device.

  For example, when the train 6 shown in FIG. 1 approaches beyond a train interval to be secured for a preceding train (not shown), the train control unit 63a generates a brake command and transmits it to the brake control device. The brake is applied automatically.

  Thus, in the radio train control section, the train speed can be controlled without using a conventional track circuit. Therefore, not only cost reduction and safety improvement can be achieved, but also appropriate train interval control can be performed, and transportation efficiency can be improved. However, since the train is a moving body, the radio base stations to communicate with must be sequentially switched according to the movement of the train.

  FIG. 3 is a diagram for explaining the operation of the train radio system when the train 6 operates beyond the handover point (HO point). In FIG. 3, the vehicle 60b is the leading vehicle, and the vehicle 60a is the last vehicle. The transmission from the radio base stations 5a and 5b to the train 6 may be performed by adopting a time division multiplexing (TDM) as described later, divided into slots, and continuous waves (solid lines). Transmission from 6 to the radio base stations 5a and 5b may be performed by burst waves (dotted lines).

  In FIG. 3A, in the area where the radio base station 5a and the radio base station 5b are installed, the radio communication unit 62b of the vehicle 60b communicates with the radio base station 5a, and the radio communication unit 62a of the vehicle 60a Only receiving data from the station 5a.

  In FIG. 3B, the vehicle 60b exists on the handover point (HO point) between the radio base station 5a and the radio base station 5b. At this time, the radio communication unit 62b of the vehicle 60b switches the communication partner from the radio base station 5a to the radio base station 5b. The wireless communication unit 62b of the vehicle 60b switches the communication partner from the wireless base station 5a to the wireless base station 5b, and the wireless communication unit 62a of the vehicle 60a changes the wireless base station that receives data from the wireless base station 5a. Switch to the radio base station 5b. That is, in the train radio system of the present invention, the timing at which the radio base station of the leading vehicle is switched at the handover point is synchronized with the timing at which the last vehicle switches the radio base station. As described above, as an example of means for switching the radio base station, a mode in which communication between the radio base station and the radio communication unit of the on-board apparatus is performed by time division multiplexing (Time Division Multiplexing) will be described.

  In the train radio system of the present invention, when communication between the radio base station and the radio communication unit of the on-board apparatus is performed by the time division multiplexing method, for example, 16 time slots (60 milliseconds) are set to one cycle (960 milliseconds). )And it is sufficient. When four broadcast frames are included in 16 time slots, there are 12 free time slots, and it is possible to control up to 12 trains up and down per radio base station. is there. When it is detected that the onboard device 61b of the leading vehicle of the train 6 has passed the handover point (HO point) at the switching timing of the radio base station shown in FIG. 3B, the train position information message (B → A message) ) Switches from the time slot before the handover point (HO point) to the time slot after the handover point (HO point) (may be the same). Regarding the train control message (A → B message), the ground control device 3A transmits the same message from both the radio base station 5a before the handover point (HO point) and the radio base station 5b after the handover. When the ground control device 3A detects that the leading vehicle has passed the handover point (HO point), the train control message (A → B message) via the radio base station 5a becomes “empty”. Information from the control device 3A cannot be received. The on-board device 61a and the on-board device 61b are synchronized with each other via the communication line 68 (or the lead-in line), and the communication destination of the wireless communication unit 62a on the on-board device 61a side is switched to the wireless base station 5b. Continues to receive train control messages (A → B messages) from the ground control device 3A.

  In the train radio system of the present invention, when the first time slot from the radio base station 5a is emptied, all other time slots sent from the radio base station 5a are also emptied at the same time. Data is included in each time slot sent from 5b. If it does in this way, it is also possible to switch the radio base station from which the last vehicle receives data at the timing when the radio base station communicating with the leading vehicle is switched.

  However, if the communication partner is switched simply because the time slot is emptied, it is mistaken for the timing to switch the radio base station even when a failure or malfunction occurs.

  Therefore, in the train radio system of the present invention, when the radio base station is switched, the first vehicle notifies the last vehicle via the communication line 68 that the radio base station should be switched. With this configuration, handover control can be performed without misidentifying the switching timing of the radio base station.

  Thus, according to the train radio system of the present invention, the handover of the last vehicle can be quickly performed after the handover of the leading vehicle without misidentifying the switching timing of the radio base stations. Therefore, the radio base stations that communicate as the entire train are unified, and end exchange and backup can be performed quickly.

  That is, in the prior art, handover of a plurality of on-board devices is not taken into consideration. For example, when the on-board device of the leading vehicle is handed over, the ground control device passes one train via a predetermined base station. Therefore, the ground control device communicates with the on-board device via the wireless base station after the handover. For this reason, on-board devices other than the leading vehicle cannot communicate with the radio base station, cannot receive a message from the ground control device, and do not know the position until they pass the position-determined ground element. In this way, there is a problem that the on-board device other than the head vehicle becomes inoperable and end replacement or backup cannot be performed. Therefore, in the train radio system of the present invention, the radio base stations to be communicated are unified for the entire train, and the ground control is performed when one on-board device that is bi-directionally communicating with the ground control device switches the radio base station. Communication with other on-board devices that receive information from the device is interrupted, and the on-board device is prevented from functioning.

  In the present embodiment, only the leading vehicle and the last vehicle have been described, but the leading vehicle and the following vehicles other than the leading vehicle are also synchronized in the same manner, and after the leading vehicle is handed over, Over can be performed quickly. That is, the present invention is a train radio system that wirelessly controls the operation of a train in a radio train control section on a track, and the train detected from the ground child information on the track and the train A train control unit that generates position information of the train based on speed, checks the train speed with a speed check pattern, and controls the train speed, and a wireless communication unit that transmits the position information from the train control unit An on-board device having a plurality of radio base stations arranged in the radio train control section and communicating with the radio communication unit of the on-board device, and receiving the position information via the radio base station, A plurality of ground control devices that control the operation of the train based on position information, and the leading vehicle and the following vehicle of the train each have the on-board device, and the leading vehicle of the train has the car When the radio base station with which the radio communication unit of the apparatus communicates at a handover point is switched, the radio base station with which the radio communication unit of the on-board apparatus of the subsequent vehicle of the train also communicates is switched. A train radio system is included.

  The train radio system according to the present invention described above is useful when both the first vehicle and the last vehicle of a train including a plurality of vehicles communicate with the radio base station or receive data.

  DESCRIPTION OF SYMBOLS 1 Line management apparatus, 2 train radio system network, 3A-3D ground control apparatus, 4A-4D base network, 5a-5h wireless base station, 6 train, 7 track, 60a, 60b vehicle, 61a, 61b on-board apparatus, 62a , 62b Radio communication unit, 63a, 63b Train control unit, 64a, 64b Position detection unit, 68 Communication line, 80 Position information, 81 Stop limit position information, 620a, 620b Radio frequency control unit.

Claims (2)

A train radio system that wirelessly controls the operation of a train within a radio train control section on a track,
A train that generates position information of the train on the basis of ground element information from the ground element on the track and the train speed detected by the train, and controls the train speed by checking the train speed with a speed check pattern. An on-board device having a control unit and a wireless communication unit for transmitting the position information from the train control unit;
A plurality of radio base stations that are arranged in the radio train control section and communicate with the radio communication unit of the on-board device;
A plurality of ground control devices that receive the position information via the wireless base station and control the operation of the train based on the position information;
The first vehicle and the last vehicle of the train each have the on-board device,
When the radio communication unit of the on-board device of the head vehicle of the train switches the radio base station that communicates at a handover point, the radio communication unit of the on-board device of the last vehicle of the train also A train radio system characterized by switching radio base stations to communicate with. A train radio system that wirelessly controls the operation of a train within a radio train control section on a track,
A train that generates position information of the train on the basis of ground element information from the ground element on the track and the train speed detected by the train, and controls the train speed by checking the train speed with a speed check pattern. An on-board device having a control unit and a wireless communication unit for transmitting the position information from the train control unit;
A plurality of radio base stations that are arranged in the radio train control section and communicate with the radio communication unit of the on-board device;
A plurality of ground control devices that receive the position information via the wireless base station and control the operation of the train based on the position information;
The leading vehicle and the following vehicle of the train each have the on-board device,
When the wireless base station with which the wireless communication unit of the onboard device of the leading vehicle of the train communicates at a handover point is switched, the wireless communication unit of the onboard device of the subsequent vehicle of the train also communicates. Train radio system characterized by switching radio base stations to be operated.

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