JP2012106571A - Train control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a train control system by which an on-board control device and a hub device can receive information efficiently through a wireless communication.SOLUTION: The train control system has an on-board control device 21 installed in a train and a hub device 12A installed on ground. A first transmitting means of the on-board control device broadcasts train-side information in which train discriminating information is added to train state information, and a first receiving means of the on-board control device receives control information. A train controlling means controls the train on the basis of the control information loaded with the train discriminating information. The hub device includes a second receiving means, a storing means, a generating means, and a second transmitting means. The second receiving means receives the information broadcasted from the train by a plurality of wireless communication stations 13A1 to BX. The storing means stores the received train-side information. The generating means generates the control information for the train on the basis of the train state information contained in the received train-side information. The second transmitting means adds the train discriminating information to the generated control information, and broadcasts them.

Description

  Embodiments described herein relate generally to a train control system that performs train control of a railway using wireless communication.

  Conventionally, in a train control system that controls a train using wireless communication, a communication method that specifies a transmission destination without using broadcast is adopted as a wireless communication method between the on-board control device and the base device. There are many examples. In such a communication method, a procedure (zone transition) when a base device that is a wireless connection partner of the on-board control device is changed from the currently connected base device to an adjacent base device may be complicated.

JP 2006-306159 A

  An object of the present invention is to provide a train control system in which information can be efficiently exchanged between a vehicle-side device and a ground-side device using wireless communication.

  According to the embodiment, the train control system includes an on-board control device mounted on a train and a base device installed on the ground. The on-board control device includes first transmission means, first reception means, and train control means. A 1st transmission means broadcasts the train side information which added train identification information to train state information. The first receiving means receives control information. The train control means controls the train based on the control information to which the train identification information is assigned. The base device includes second receiving means, storage means, generating means, and second transmitting means. The second receiving means receives information broadcast from the train at a plurality of wireless communication stations. The storage means stores the received train side information. A production | generation means produces | generates the control information with respect to a train based on the train state information contained in the received train side information. The second transmission means broadcasts the train control information added to the generated control information.

FIG. 1 is a diagram schematically illustrating a configuration example of a ground-side system in a train control system. FIG. 2 shows a flow of information when a handover occurs between adjacent radio base stations in a railway network. FIG. 3 shows a flow of information transmitted from the vehicle upper system when a zone transition occurs between adjacent base devices. FIG. 4 shows a flow of information transmitted from the ground side system when a zone transition occurs between adjacent base apparatuses. FIG. 5 shows a process in which a base device that is a wireless communication connection partner changes as the train on which the vehicle upper side system is mounted moves. FIG. 6 shows a detention sequence showing a communication procedure of information immediately before detaining a train. FIG. 7 shows an activation sequence showing a communication procedure of information when the train is restarted after detention.

Hereinafter, embodiments will be described with reference to the drawings.
The train control system according to the present embodiment is a system that controls the traveling of a train by transmitting and receiving information between a ground-side system (ground system) installed on the ground and a vehicle-side system (vehicle system) mounted on the train. It is. In the train control system according to the present embodiment, data is transmitted and received between the ground-side system and the vehicle-side system through broadcast wireless communication.

  The ground side system is composed of various devices installed on the ground. The ground side system is a system capable of communicating with a train traveling on a route to be controlled. The ground system manages the operation of each train based on the operation schedule and the operation status of each train. The vehicle upper system is composed of various devices mounted on the train. The vehicle upper system controls the train based on information given from the ground system. The vehicle upper system also has a function of providing information on the speed information or position information of the train to the ground system while traveling.

FIG. 1 is a diagram schematically illustrating a configuration example of a ground-side system in a train control system.
The ground side system shown in FIG. 1 has a configuration in which a plurality of railway networks 2 (2A, 2B,...) Are connected by a network 1 between bases. The inter-base network 1 connects the command center apparatus 11 and a plurality of base apparatuses 12 (12A, 12B,...). Each railway network 2A (2B,...) Connects each base device 12A (12B,...) And a plurality of radio base stations 13A1, 13A2,... (13B1, 13B2,...). The ground side system is constructed so that the entire area in which the train to be controlled travels becomes the communication range of wireless communication.

  A jurisdiction area is assigned to each site apparatus 12 connected to each railway network 2. In other words, the entire area that enables wireless communication with the train to be controlled is divided into the jurisdiction areas of the respective base devices 12. Each track network 2 is a network that performs wireless communication with the upper system of each train in the jurisdiction area assigned to each base device 12. Each radio base station 13 connected to each railway network 2 is installed so as to enable wireless communication with an on-board system mounted on a train traveling in the jurisdiction area. Each wireless base station 13 performs wireless communication with an on-board system mounted on a train traveling in a jurisdiction area in the railway network 2.

  Each base device 12 includes a base control unit 15 and a shared memory 16. The site control unit 15 performs wireless communication control with the vehicle upper system in the railway network 2, communication control with the command center apparatus 11, data processing, and the like. For example, the site control unit 15 is configured by a computer having a processor, a memory, various interfaces, and the like. In the site control unit 15, various processing functions are realized by the processor executing programs stored in the memory. The shared memory 16 is a storage device that can be accessed from each base device connected in the inter-base network 1. The site control unit 15 can share information with other site devices connected via the shared memory 16 via the network between sites. The shared memory 16 stores information on each train received from the upper system of each train, information indicating the state of the route such as a branching unit, and the like.

  The vehicle upper system is installed in each train. As shown in FIG. 1, the vehicle upper system is a system in which an onboard control device 21 and an onboard radio device 22 are connected by a network 20 in each train. The on-board controller 21 (21A, 21B) performs train operation control, wireless communication control, and the like. For example, the on-board control device 21 controls the speed of the train or the safety brake based on the information received from the ground side system. The on-board control device 21 includes a processor, a memory, various interfaces, and the like. In the on-vehicle control device 21, various processing functions are realized by the processor executing programs stored in the memory. The on-vehicle wireless device 22 transmits and receives radio waves for wireless communication with each wireless base station of the ground side system. In addition, in the vehicle upper system of each train, the on-board wireless device 22 may be one or plural.

Next, train control by the train control system will be schematically described.
First, the command center apparatus 11 performs schedule management that is the basis of the operation schedule of each train on the route. In addition, the command center apparatus 11 collects on-line information (information on where each train exists) of each train transmitted from each base apparatus 12 via the inter-base network 1. The command center apparatus 11 transmits a route setting request to each base apparatus 12 as necessary based on the operation schedule of each train, the on-line information of each train, and the like. The route setting request is a request for preparation for allowing the train to travel safely on the planned travel route.

  The base station device 12 that has received the route setting request sets the route that is the basis of the route setting request while grasping the position of each train existing in the jurisdiction area. For example, the base unit 12 confirms whether there is another train on the planned travel route of the train, or whether there is a branch device that has not been changed to the planned travel direction of the train. Based on the confirmation result, the base device 12 can transmit a branch switch conversion command to the switch device 14.

  When it is confirmed that the switch device 14 has completed the switching of the branching device, the base device 12 locks the target switch device 14. Information indicating the state of the branching unit is stored in the shared memory 16. The base device 12 continuously calculates a stop limit position indicating how far the train can travel. The stop limit position information is assigned version information and stored in the shared memory 16, and is transmitted from the base unit 12 to the train upper system via each radio base station 13. The base unit 12 also transmits information indicating various speed limits together with the stop limit position information to the train upper system via the radio base station 13.

The on-board control device 21 performs train control while monitoring the train speed based on information such as stop limit position information and various speed limit information received from the ground side system. The on-board control device 21 performs safety brake control (for example, deceleration and stop control for rear-end collision avoidance control on a preceding train or derailment avoidance control on a branching device) as necessary. Further, the on-board controller 21 detects the speed and position of the train, and transmits the position information on the front and rear ends of the train to the base unit 12 via the on-board radio unit 22 and the radio base station. .
As described above, in the train control system, the ground-side system and the vehicle-side system perform data communication to control safe and smooth travel of the train.

Next, processing for transmitting information from the vehicle upper system to the ground system will be described.
2 and 3 are diagrams for explaining processing for transmitting information from the vehicle upper system to the ground system by wireless communication. 2 and 3 show a situation in which a train on which the vehicle upper system is mounted is traveling in the traveling direction indicated by an arrow a in the drawings.

  When the train travels, the radio base station capable of radio communication sequentially changes in the on-board radio device of the vehicle upper system mounted on the train. That is, in the on-board wireless device, the wireless base station that is the communication partner sequentially shifts according to the traveling of the train. Within each line network (the jurisdiction area of each base device), handover occurs between adjacent radio base stations 13, and zone transition occurs between different line networks.

  Moreover, since the vehicle upper system mounted in each train broadcasts information, it may be received by a plurality of different radio base stations. For example, one base device 12 may receive one piece of information transmitted from the vehicle upper system of one train a plurality of times via a plurality of different radio base stations in one railway network. In addition, one piece of information transmitted from the upper system of one train may be received by a plurality of base devices via a plurality of different radio base stations in different railway networks.

  In the train control system, the base unit 12 of the ground side system and the on-board controller 21 of the vehicle upper system establish a communication connection by recognizing each other's communication partner in order to reliably control each train. For example, the onboard control device 21 recognizes which base device 12 the information transmitted by itself arrives, and each base device 12 determines which onboard control device 21 the information transmitted by itself arrives. recognize. Thereby, the ground side system (base device) and the vehicle upper system (vehicle control device) can recognize each other's communication partner.

  The onboard control device 21 identifies the freshness (freshness) of information received from the ground side system (base device), and each base device 12 receives information received from the onboard system (onboard control device). Identify newness (freshness). The on-board control device 21 controls the train with new information among the information received from the ground side system (base device). Each base apparatus 12 produces | generates the information for controlling each train based on new information among the information received from the vehicle upper side system (vehicle control apparatus).

  Further, each base device 12 stores new information of each train in the shared memory 16 among the information received from the vehicle upper system (vehicle control device) of each train. Each base device can refer to information stored in a shared memory of another base device. That is, the information stored in the shared memory of each base device is shared among a plurality of base devices connected by the inter-base network 1.

  The upper side system of each train includes train position information, train ID (train identification information), and serial number as train state information in order to notify the ground side system of the current position as the current state of the train. Broadcast information as train side information. That is, in the vehicle upper system, the on-board controller 21 continuously (at a predetermined time interval) serial numbers assigned to the train ID indicating the train, the train position information indicating the position of the train, and the train position information. Train side information including numbers is generated. The on-board control device 21 sequentially broadcasts the generated train side information by the on-board wireless device 22.

  Since such train-side information is broadcast from the on-board wireless device 22, there is a possibility that the train-side information may be received by a plurality of wireless base stations 13 in a range in which radio waves can be transmitted and received with the on-board wireless device 22. In addition, since the train side information broadcast from the on-board wireless device 22 may be received by the plurality of base side devices 12, the base unit information is obtained from the train ID and serial number included in the received train side information. Identify the novelty of

  In the upper side system of each train, the onboard control device 21 gives a serial number to the train side information including the train position information. The serial number is information for serially sequencing the train side information transmitted from the vehicle upper system. Therefore, the freshness (freshness) of the train side information transmitted from the vehicle upper system can be determined by the serial number. The train ID is information for identifying a train on which the vehicle upper system is mounted. The train position information is information indicating the position of the train on which the vehicle upper system is mounted. For example, in the vehicle upper side system, the on-board control device detects the ground element installed on the travel path by the vehicle element installed on the train, determines the train position, and integrates the train speed. To determine the train position.

Here, the operation when the base device 12 receives train-side information from the radio base station 13 in the railway network 2 will be described.
FIG. 2 shows a situation in which handover occurs between adjacent radio base stations in the railway network 2. That is, FIG. 2 shows a situation in which the base device 12 receives train side information from a plurality of radio base stations 13 in the railway network 2.

  The base device 12 sequentially receives train side information from the plurality of radio base stations 13 in the railway network 2. In the base device 12, the base control unit 15 identifies and manages information received from each radio base station 13 in the railway network 2. For example, in the base device 12, the base control unit 15 stores the latest train-side information associated with each train ID in the shared memory 16. For this reason, the base control unit 15 determines whether or not the train side information received from the vehicle upper system is newer than the information stored in the shared memory 16, and stores the new train side information in the shared memory 16.

  For example, the base device 12 compares the “serial number received via a different radio base station” with the “serial number for the train ID registered in the shared memory”. That is, the site control unit 15 determines whether the information received from the comparison result is newer than the information stored in the shared memory 16. The upper system of each train shall assign serial numbers to the information to be transmitted in order. In this case, the base device 12 can determine new information based on the serial number. The site control unit 15 determines which information is new by comparing the serial number of the received information with the serial number of the information corresponding to the train ID of the received information stored in the shared memory 16. . If the received information is new, the site control unit 15 updates the information stored in the shared memory 16 (train position information, serial number, etc.) to the received information.

  As a result, the newest information can be stored in the shared memory 16 for one train ID. In other words, when the base control unit 15 of a certain base station device 12 updates the train position information corresponding to the same train ID (update of the shared memory), the train position information on the shared memory 16 becomes information that is older in time. It can be prevented from returning.

Next, an operation when a zone transition occurs between a plurality of base devices will be described.
FIG. 3 shows a situation where a zone transition has occurred between adjacent base devices. FIG. 3 shows a situation in which train side information from the vehicle upper system is successively received by the base device 12A and the base device 12B.

  The base device 12A and the base device 12B receive the train-side information from the on-board system via the plurality of radio base stations in the railway networks 2A and 2B, respectively. In the base device 12A, the base control unit 15A identifies and manages the train-side information received from the radio base station in the railway network 2A.

  For example, in the base devices 12A and 12B, the base control units 15A and 15B respectively obtain “a serial number received via different radio base stations” and “a serial number for the train ID registered in the shared memory”. To determine whether the received information is newer than the information stored in the shared memories 16A and 16B. If the received information is new, the base control units 15A and 15B update the information stored in the shared memories 16A and 16B (such as train position information and serial number) to the received information.

  Further, the base control unit 15A or 15B may determine new information based on the serial number when the train side information of the same train ID is stored in the shared memory of the adjacent base device. That is, the base control units 15A and 15B determine whether or not the train side information corresponding to the train ID of the train side information received is stored in the shared memory of the adjacent base device, and the train corresponding to the train ID. When it is determined that the side information is stored, new information is determined based on the serial number. In addition, the base control units 15A and 15B may update the train side information corresponding to the train ID stored in the shared memory in its base device to the train side information having a new serial number. Thereby, each base apparatus can memorize | store the newest information with respect to train ID of the train which can communicate in a shared memory, and train side information, such as the train position information memorize | stored in the shared memory of each base apparatus, is temporal. It is possible to prevent returning to old information.

Next, processing for transmitting information from the vehicle upper system to the ground system will be described.
FIG. 4 shows a situation where a zone transition has occurred between adjacent base devices. FIG. 4 shows a situation in which train control information is transmitted from the ground system to the vehicle upper system mounted on the train.

  In each site apparatus 12, the site control unit 15 takes in information (such as train position information and branching unit status information) related to a train to be controlled (a train equipped with a vehicle upper system in a communication state) from the shared memory 16. (Step S21). As described with reference to FIG. 2 or FIG. 3, the shared memory 16 stores the latest train-side information among the train-side information acquired from the vehicle-side system of each train for each train. Thereby, the base control part 15 can grasp | ascertain the in-line state of each train. The shared memory 16 also stores information indicating the current state of the branching device (the switching of the branching device by the switch device and the locked state).

  The base control unit 15 determines the stop limit as control information for the train to be controlled based on the train position information of each train fetched from the shared memory 16 (the status of each train) and the information indicating the state of the turnout. The position is calculated (step S22). The stop limit position is continuously calculated for the train to be controlled. For example, the base control unit 15 calculates the stop limit position for the control target train at 100 ms intervals while the communication state continues.

  When the stop limit position is calculated, the site control unit 15 stores the version number in association with the stop limit position information indicating the calculated stop limit position in the shared memory 16 (step S23). For example, the base control unit 15 checks the version number of the stop limit position information for the train stored in the shared memory of the adjacent base device, and gives the latest version number to the calculated stop limit position information. When the stop limit position information is stored, the base control unit 15 broadcasts the stop limit position information to which the train ID and the base ID are assigned by each radio base station 13 in the railway network 2 (step S24).

  In the example shown in FIG. 4, a zone transition occurs between the base device 12A and the base device 12B. In this case, the site control unit 15A of the site device 12A acquires the train position information of the train to be controlled and the status information of the turnout from the shared memory 16A (step S21), and calculates the stop limit position (step S22). ). The site control unit 15A checks the shared memory 16A and the shared memory 16B, assigns the latest version number to the calculated stop limit position and stores it in the shared memory 16A (step S23), and also shows a train to be controlled Each radio base station 13A broadcasts the stop limit position information to which the ID and the base ID indicating the base device are assigned (step S24).

  On the other hand, also in the base unit 12B adjacent to the base unit 12A that is the target of the zone transition, the base control unit 15B captures the train position information, the branching unit state information, and the like from the shared memory 16B (step S31). The stop limit position of the train is calculated (step S32). The site control unit 15B checks the shared memory 16B and the shared memory 16A, assigns the latest version number to the calculated stop limit position information, and stores it in the shared memory 16B (step S33). When the stop limit position information is stored in the shared memory 16B, the base control unit 15B broadcasts the stop limit position information to which the train ID and the base ID are assigned by each radio base station 13B (step S34).

  The upper system mounted on the train to be controlled receives stop limit position information successively from the base device 12A and the base device 12B via the radio base station 13A and the radio base station 13B. The on-board control device 21 of the vehicle upper side system determines the newness of the stop limit position information received by the on-vehicle wireless device 22. That is, every time the on-board control device 21 receives the stop limit position information by the on-board wireless device 22, the received stop limit position information is the latest by the version number given to the received stop limit position information. Determine whether or not. The on-board controller 21 controls the train based on the latest stop limit position information as train control means. For example, the on-board controller 21 may hold the latest stop limit position information. In this case, when the on-board controller 21 determines that the received stop limit position information is the latest, the on-board control device 21 updates the held stop limit position information to the latest information.

  Here, the version number given to the stop limit position information from the base device 12B (stop limit position information received from the radio base station 13B) is received from the stop limit position information (the radio base station 13A) from the base device 12A. It is assumed that it is newer than the version number assigned to the stop limit position information. In this case, even if the on-board controller 21 receives the stop limit position information from the base device 12A after the stop limit position information from the base device 12B, the version number of the stop limit position information received from the base device 12B. It is possible to ignore the stop limit position information received from the base device 12A having an older version number.

  By performing the above-described process, the on-board controller of the vehicle upper system can identify the latest stop limit position information from the stop limit position information broadcast from each base device via a plurality of radio base stations, The train can be controlled based on the latest stop limit position information. Further, each base device can easily broadcast stop limit position information by assigning a version number to stop limit position information of a train to be controlled that is continuously calculated.

Next, connection processing by wireless communication between the on-board control device 21 and each site device 12 will be described.
In the train control system, the vehicle upper system and the ground system are connected by wireless communication. Furthermore, in this train control system, the communication method between the vehicle upper system and the ground system passes through the on-board wireless device of the vehicle upper system and a plurality of wireless base stations connected to each network along the ground system. Adopted broadcast. By adopting broadcast as a wireless communication method, the train control system can simplify zone transitions and reduce the time required for communication.

  Since the vehicle upper system and the ground system broadcast information, it is necessary to recognize each other's communication partner. For example, the data transmitted and received between the vehicle upper system and the ground system may include information related to control for safely running each train, so it is necessary to reliably recognize the communication partner. In this train control system, the on-board control device of the vehicle upper system recognizes the base device that is the communication partner by the base ID, and each base device of the ground side system is the on-board control device that is the communication partner. Is recognized by the train ID.

FIG. 5 shows a process in which a base device that is a wireless communication connection partner changes as a train equipped with the vehicle upper system travels.
First, when the on-board controller 21 has not yet established a wireless connection with any base device (for example, immediately after the on-board controller 21 is turned on), the on-board controller 21 of the on-board system mounted on the train. Generates train-side information including the train ID of its own train (for example, train ID = “A1000”) and information indicating that the base device of the communication partner is undecided, and is broadcast by the on-board wireless device 22 Transmit (step S41).

  For example, the on-board control device 21 adds a train ID of the train to which the serial number has been assigned according to the above-described procedure and information indicating the base device already recognized as a communication partner (in this case, to be determined). Generate side information. For example, a base device ID indicating a base device recognized by the on-board control device 21 is used as information indicating the base device that has been recognized as a communication partner. At a stage where no wireless connection has been established with any base device (when there is no recognized base device), the on-board controller 21 determines that the base device ID to be added to the train side information is undetermined (for example, undetermined = 0xFFFF). To do.

  The train side information broadcast by the on-board control device 21 includes base device IDs indicating a plurality of base devices. In the example illustrated in FIG. 5, two base device IDs are included as information indicating recognized base devices. This is because it is assumed that the ground side system (onboard control device) is connected to a plurality of base devices via a plurality of railway networks. That is, in this train control system, the on-board control device 21 may be in communication with the two base devices at the same time due to zone transition.

  In the present embodiment, since it is not assumed that the communication state is simultaneously established with the three base devices, the base device IDs of the two base devices are included in the train side information. However, in the operation mode in which the communication state may be simultaneously established with three or more base devices, the train side information may include three or more base device IDs.

  The train-side information broadcast from the on-board controller 21 is received by the radio base station within the communication range. Each radio base station 13 transfers the received train-side information to a base station existing in the railway network 2 to which the radio base station belongs. As shown in FIG. 5, it is assumed that the base station apparatus 12A has received the train side information broadcast from the onboard system (onboard control apparatus 21) via the radio base station 13A. In the base device 12A, the base control unit 15A determines the freshness of the train side information received by the above-described processing, and stores the new train side information in the shared memory 16A. 15 A of base control parts recognize the train of train ID contained in the said train side information as a control object.

  Further, the base control unit 15A assigns a version number to the stop limit position information calculated from the train position information, the branching unit state information, and the like for the train to be controlled by the above-described processing, and stores it in the shared memory 16A. The base control unit 15A adds the train ID (for example, “A1000”) of the train to be controlled and its base apparatus ID (for example, 0x0001) to information such as the stop limit position information to which the version number is assigned. The given information (ground side information) is transmitted by broadcast (step S42).

  When the on-board control device 21 receives the ground side information including the train ID of the train by the on-board wireless device 22, the on-board control device 21 determines the base device of the transmission source (communication partner) based on the base device ID included in the ground side information. To do. In the example shown in FIG. 5, the on-board control device 21 determines that the base device of the transmission source (communication partner) is the base device 12A based on the base device ID (for example, 0x0001) included in the ground side information transmitted from the base device 12A. Recognize that. With such a communication procedure, the on-board control device 21 establishes a wireless connection with the base device 12A.

  The on-board control device 21 controls the traveling of the train based on stop limit position information included in the ground side information received from the base device 12. For example, the on-board controller 21 determines whether or not the stop limit position information is the latest information based on the version number of the stop limit position information included in the ground side information received from the base device 12. When it is determined that the stop limit position information included in the received ground side information is the latest information, the on-board controller 21 controls the traveling of the train based on the received stop limit position information.

  Moreover, the on-board controller 21 continuously detects the current train position, generates train side information including the train position information, and sequentially broadcasts it to the ground side system (step S43). For example, in the state where the connection with the base device 12A is established, the on-board control device 21 gives a new serial number to the train position information indicating the current train position, and further, the train ID of the train, the first Train side information is generated by adding the base device ID (0x0001) of the base device 12A as the base device and the information (0xFFFF) indicating that the base device as the second base device is undetermined. The on-board control device 21 broadcasts the generated train side information by the on-board wireless device 22.

  As described above, the train side information broadcast by the on-board control device 21 includes the base device ID indicating the recognized base device. In other words, the on-board control device 21 recognizes the on-board control device 21 on the ground-side system by including information (0x0001) indicating the base device recognized by the on-board system in the train side information. The base device is notified.

  In the base device 12 that has received the train-side information broadcast from the on-board control device 21, the base control unit 15 determines whether the received train-side information includes the base device ID of the base device. When it is determined that its own base device ID is included, the base control unit 15 establishes a communication connection with the vehicle upper system (the onboard control device 21) mounted on the train with the train ID included in the train side information. Recognize that

  If the received train-side information is new by the above-described processing, the site control unit 15 calculates stop limit position information for the train and updates information corresponding to the train ID in the shared memory 16A. The base control unit 15A includes the calculated stop limit position information, the version number of the stop limit position information, the train ID of the train to be controlled (for example, “A1000”), and the own base apparatus ID (for example, 0x0001). Send side information by broadcast.

  With the above communication procedure, the on-board control device 21 of the on-vehicle side system is in a state where the on-board radio device 22 mounted on the train is within the communication range of the plurality of radio base stations 13A connected to the base device 12A via the network along the line. And the base unit 12 of the ground system can transmit and receive information by broadcasting while recognizing each other as a communication partner.

  Further, as the train travels, the on-board control device 21 can communicate with not only one site device but also another site device. The on-vehicle control device 21 broadcasts the train side information without uniquely specifying the transmission destination. For this reason, while the train is traveling in a region where the communication range of the first base device 12 and the communication range of the second base device 12 overlap, one train side information transmitted from the onboard control device 21 is , And received by the first base device 12 and the second base device 12. As shown in FIG. 5, the on-board control device 21 in communication with the base device 12A communicates with the base device 12B in the communication range adjacent to the communication range of the base device 12A as the train travels. .

  That is, after the communication with the base device 12A is established, the on-board controller 21 transmits the train side information including the train position information to the base device 12A while the train travels within the communication range of the base device 12A. The ground side information including the stop limit position information is received from the base device 12A. When the train enters the communication range of the base device 12B, the train side information transmitted from the on-board wireless device 22 is received not only by the wireless base station 13A but also by the wireless base station 13B. That is, if the train exists in an area where the communication range of the base device 12A and the communication range of the base device 12B overlap, the train side information transmitted by the on-board control device 21 is received by the base device 12A and the base device 12B. Is done.

  After communication with the base device 12A is established and until communication with the base device 12B is established (that is, the train is in the communication range of the base device 12A and reaches the communication range of the base device 12B). The on-board control device 21 has the train ID (= “A1000”) of its own train, the base device ID (0x0001) of the base device 12A as the first base device, and the second base device. The on-board wireless device 22 broadcasts train-side information including information (0xFFFF) indicating that the base device is undecided (step S44).

When the on-board wireless device 22 mounted on the train reaches the communication range of the base device 12B, the base device 12B transmits the train ID ("A1000") and the first base device via the wireless base station 13B. Train-side information including the base device ID (0x0001) and the second base device is undetermined information (0xFFFF) is received (step S54). This train side information is also received by the base unit 12A (step S44).
In the base device 12A, if the received train-side information is new information, the base control unit 15A calculates stop limit position information for the train and updates information corresponding to the train ID in the shared memory 16A. The base control unit 15A broadcasts the ground side information including the calculated stop limit position information, the version number of the stop limit position information, the train ID (A1000) of the train to be controlled, and its base device ID (0x0001). (Step S45).

  On the other hand, in the base device 12B, the base control unit 15B checks the train side information stored in the shared memory 12A of the adjacent base device 12A and determines the freshness of the received train side information. If the received train side information is new, the base control unit 15B calculates stop limit position information for the train, and updates information corresponding to the train ID in the shared memory 16B. The base control unit 15B uses the base-side information including the calculated stop limit position information, the version number of the stop limit position information, the train ID (A1000) of the train to be controlled, and its base device ID (0x0002) as a radio base. Broadcasting is transmitted from the station 13B (step S46).

  When the ground side information including the base device ID (0x0002) is received from the base device 12B as the second base device, the on-board controller 21 transmits the transmission source by the base device ID (0x0002) included in the ground side information. It recognizes that the base device of the (communication partner) is the base device 12B. With such a communication procedure, the on-board control device 21 establishes a wireless connection with the base device 12B. Here, since the ground side information including the base device ID (0x0001) is also received from the base device 12A as the first base device, the on-board controller 21 also maintains a wireless connection with the base device 12A. .

  That is, when the ground-side information including the first base device ID (0x0001) and the ground-side information including the second base device ID (0x0002) are received, the on-board control device 21 has two base devices ( The connection between the base device 12A and the base device 12B) is established. In this case, the on-board control device 21 broadcasts the train side information including the train ID (A1000) of the train and the two base device IDs (0x0001, 0x0002) indicating the two base devices with which the connection has been established. Transmit (step S47).

  The on-board control device 21 connects train position information and the like until ground side information (ground side information including base device IDs other than 0x0001 and 0x0002) is received from base devices other than the first and second base devices. Is continuously broadcasted as train-side information including the two base device IDs (0x0001, 0x0002) established. For this reason, while the train exists in an area where the communication range of the base device 12A and the communication range of the base device 12B overlap, the base device 12A and the base device 12B each have two base device IDs (0x0001, 0x0002). The train side information including it is received continuously.

  Furthermore, when the train travels in the communication range of the second base device, the train-side information broadcast by the on-board controller 21 is also received by the radio base station 13C. That is, when the train reaches an area where the communication range of the base device 12B and the communication range of the base device 12C overlap, the train side information transmitted by the on-board control device 21 is received by the base device 12B and the base device 12C. Is done. Here, the communication range of the first base device and the communication range of the third base device (in the example shown in FIG. 5, the communication range of the base device 12A and the communication range of the base device 12C) do not overlap. Assume that it is designed. Therefore, when the train reaches an area where the communication range of the base device 12B and the communication range of the base device 12C overlap, the train side information transmitted by the on-board control device 21 is received by the base device 12B and the base device 12C. Is done.

  After the communication with the base device 12B is established, until the train side information is received by the base device 12C (that is, the train is within the communication range of the base device 12B and reaches the communication range of the base device 12C). The on-board control device 21 has the train ID (= “A1000”) of its own train, the base device ID (0x0001) of the base device 12A as the first base device, and the second base. Train-side information including the base device ID (0x0002) of the base device 12B as the device is broadcast by the on-board wireless device 22 (step S48).

When the train (the on-board wireless device 22 mounted on the train) reaches the communication range of the base device 12C, the base device 12C receives the train ID (A1000) and the first base device via the wireless base station 13C. Train side information including the base device ID (0x0001) and the base device ID (0x0002) of the second base device is received (step S48). This train side information is also received by the base unit 12B (step S48).
In the base device 12B, if the received train side information is new information, the base control unit 15B calculates stop limit position information for the train and updates information corresponding to the train ID in the shared memory 16A. The base control unit 15A broadcasts the ground side information including the calculated stop limit position information, the version number of the stop limit position information, the train ID (A1000) of the train to be controlled, and its base device ID (0x0002). (Step S49).

  On the other hand, in the base device 12C, the base control unit 15C determines the freshness of the train-side information received with reference to the shared memory 16B of the adjacent base device 12C. If the received train-side information is new, the site control unit 15C calculates stop limit position information for the train and updates information corresponding to the train ID in the shared memory 16C. The base control unit 15C transmits the ground side information including the calculated stop limit position information, the version number of the stop limit position information, the train ID (A1000) of the train to be controlled, and its base device ID (0x0003) to the radio base station. Broadcast via the station 13C (step S50).

  When the ground side information including the base device ID (0x0003) is received from the base device 12C as the third base device, the on-board control device 21 transmits the transmission source by the base device ID (0x0003) included in the ground side information. It recognizes that the base device of the (communication partner) is the base device 12C. Through such a communication procedure, the on-board control device 21 establishes a wireless connection with the base device 12C. Here, since the ground side information including the base device ID (0x0002) is also received from the base device 12B as the second base device, the on-board controller 21 maintains the wireless connection with the base device 12B.

  However, since it is assumed that the communication range of the base device 12A and the communication range of the base device 12C are designed so as not to overlap, the on-board control device 21 receives the information from the base device 12A as the base device 12C. Will not be received at the same time as information from. That is, when the ground side information including the base device ID (0x0003) of the base device 12C is received, the on-board control device 21 is in a state where the communication connection between the base device 12B and the base device 12C is established. Communication with the base device 12A is not possible.

  Therefore, when the ground side information including the second base device ID (0x0002) and the ground side information including the third base device ID (0x0003) are received, the on-board control device 21 receives the on-board control device 21. Since the connection between the two base devices (the base device 12B and the base device 12C) is established, the two base devices indicating the two base devices that are connected to the train ID (A1000) of the train. Train side information including ID (0x0002, 0x0003) is transmitted by broadcast (step S51).

  Thus, when the on-board control device receives the ground side information including the second base device ID (0x0002) and the ground side information including the third base device ID (0x0003), the connection is established. As information indicating the base device, the ID (0x0001) of the base device 12A is discarded, and two base device IDs (0x0002, 0x0003) of the base device 12B and the base device 12C are added to the train side information. This is because the train control system according to the present embodiment is configured to add the base device IDs of the two base devices that have recognized the wireless connection establishment to the train side information. However, the number of base device IDs to be added to the train-side information is not limited to two as long as it is plural. That is, depending on the operation mode, the number of base device IDs added to the train side information may be three or more.

  By executing the above-described processing process, the on-board controller and the base unit can mutually communicate with each other even if the broadcast control system that uses unknown broadcast where the transmitted information reaches is unknown. Recognition of wireless connection establishment. As a result, the on-board control device can recognize “to which base station the train position information transmitted by itself has reached”, and the base station device can detect “stop limit position information transmitted by itself”. To which on-board control device (train) is received. In other words, according to the train control system, information essential to the safe driving of the train, such as train position information or stop limit information, is reliably transmitted and received between the vehicle and the ground even in the broadcast-type wireless communication. You can check whether or not

Next, communication control in a case where a vehicle placed after the train is placed is restarted as a train will be described.
In the train control system, the train is detained according to the operation management, or the detained train is activated again. However, in an actual operation mode, the train ID given to each train before and after detention is often changed. For example, each base device 12 stores train position information (that is, information indicating the detained position) corresponding to the train ID received from the vehicle upper system mounted on the train immediately after detention in the shared memory. However, when the train ID for a train is changed before and after detention, the train position information corresponding to which train ID stored in the shared memory is information indicating the position of the train to be restarted after detention when the base device alone is changed. It is difficult to determine.

  For this reason, in this train control system, when the train is restarted after detention, in order to initialize the position of the train, between the ground side system (base device) and the vehicle side system (vehicle control device), Initial information for associating train IDs with the train (vehicle) before and after detention is exchanged. Thereby, the train control system can correct the position of the train to be restarted after detention based on the train position information corresponding to the train ID before detention stored in the base device. The position can be accurately determined.

  In the present embodiment described below, it is assumed that the indwelling position and the restarting position are the same position. Further, before and after the detention of the vehicle, there is a high possibility that the on-board control device mounted on the vehicle and the base device serving as a communication connection destination are the same. For this reason, in the embodiment described below, the on-board control device and the base device may perform wireless communication by a communication method other than the broadcast method.

  6 and 7 are diagrams for explaining a wireless communication procedure between the on-board controller and the base station before and after the train is detained. FIG. 6 shows an indwelling sequence showing an information communication procedure immediately before indwelling, and FIG. 7 shows an activation sequence showing an information communication procedure in restart after indwelling.

First, the indwelling sequence will be described with reference to FIG.
When the train stops at the detention position (step S60, YES), the on-board controller 21 of the upper system mounted on the train generates detention information including a train ID, a vehicle identification ID, and train position information ( Step S61). The train ID is identification information given to the train before detention. The train ID is identification information given to each train according to the operation schedule, and is information that is reset when the train is restarted after detention. The vehicle identification ID is identification information given to the vehicle of the train. The vehicle identification ID is unique information given to hardware as a vehicle, and is information that is not changed before and after detention. Train position information is information indicating the position of the train immediately after detention (the position where the train is detained). The on-board controller 21 broadcasts the generated indwelling information by the on-board wireless device 22 (step S62).

  The base device 12 receives the indwelling information broadcast from the on-board wireless device 22 of the vehicle upper system via the wireless base station 13 (step S63). The site control unit 15 of the site device 12 that has received the detention information determines whether or not to permit detention of the train based on the received detention information (step S64). For example, whether or not the detention is allowed may be determined based on an operation schedule or the like.

  If it is determined that the detention of the train is permitted (step S64, YES), the site control unit 15 stores the received detention information in the shared memory 16 (step S65). Even if it is determined that the detention is not permitted, the site control unit 15 may store detention information that is not permitted to be detained. When it is determined whether or not detention is possible, the site control unit 15 broadcasts information indicating whether or not detention is possible from the radio base station 13 as detention availability information associated with the train ID (step S66).

The on-board controller 21 receives the detention information broadcast from the radio base station 13 of the ground side system via the on-board radio device 22 (step S67). The on-board controller 21 that has received the detention availability information determines whether or not detention of the train is permitted based on the received detention availability information (step S68). When detention is permitted (step S68, YES), the on-board controller 21 completes detention of the train (step S70). The train upper system determined to be detained is turned off, for example, according to the operation of the operator. In addition, when detainment is not permitted, the on-board control device 21 may perform control for detaining the train at another position.
According to the above detention sequence, detention information including the train ID, the vehicle identification ID, and the train position information is reliably stored in the base unit 12 as the information regarding the detained train.

Next, the activation sequence will be described with reference to FIG.
When restarting a detained train, the operator turns on the power of the vehicle upper system mounted on the train. When the power of the vehicle upper system is turned on (step S70, YES), the on-vehicle controller 21 generates restart information including a train ID, a vehicle identification ID, and train position information (step S71). The train ID is identification information newly given to the train to be restarted. This train ID is identification information given to a train that is restarted after detention, and is different from the train ID given to the train before detention. In addition, train ID may be set by the system which sets train ID with respect to each train for every train by a specific operation schedule instead of each vehicle itself. Vehicle identification ID is the identification information given to the vehicle of the said train, and is information which has not been changed before and after detention. The temporary position request is information that requests information indicating the train immediately after detention (that is, train position information indicating the detained position) as a temporary position of the train to be restarted. The on-board control device 21 broadcasts the generated restart information by the on-board wireless device 22 (step S72).

  The base device 12 receives the restart information broadcast from the on-board wireless device 22 of the vehicle upper system via the wireless base station 13 (step S73). The site control unit 15 of the site device 12 that has received the restart information extracts the detention information stored in the shared memory 16 based on the vehicle identification ID included in the received restart information (step S74). The vehicle identification ID is not changed even before and after detention. For this reason, if the indwelling information stored in the shared memory 16 with the vehicle identification ID as a keyword is searched, the indwelling information with the matching vehicle identification ID can be extracted. In addition, the site control unit 15 stores the received restart information in the shared memory 16 (step S75). For example, the site control unit 15 may store the restart information in association with the indwelling information with the matching vehicle identification ID.

  The site control unit 15 determines the train position information (information indicating the detained position) included in the extracted detention information as the temporary position (initial setting position) of the train to be restarted. When the temporary position of the train is determined, the base control unit 15 uses the wireless base station 13 to obtain temporary position information obtained by adding the train ID (train ID of the restarted train) included in the restart information to the information indicating the temporary position. Broadcast (step S76).

The on-board controller 21 receives the temporary position information broadcast from the radio base station 13 of the ground side system via the on-board radio device 22 (step S77). The on-board control device 21 that has received the temporary position information sets the received temporary position as the initial position of the train to be restarted (step S78). When such a temporary position is set as the initial position, the on-board control device 21 grasps the position of the train immediately after the restart by correcting the position based on the set initial position.
With the above activation sequence, the on-board controller 21 can accurately determine the position of the train even when the indwelling train is restarted.

  In the above-described example, the vehicle identification ID is adopted as the identification information corresponding one-to-one with the vehicle as hardware. However, as long as it is information that can identify the vehicle on which the on-board control device 21 is mounted, Identification information other than the vehicle identification ID may be adopted. In addition, as the train position information, the position information of the train tip and tail ends may be required. In such an operation mode, the train length may be recognized from the train number for identifying the train train itself from the train schedule, and the position information of the train tip and tail ends may be obtained.

  As described above, in the train control system, even if the train ID is changed before and after detention, the ground-side system uses the train ID given to the train immediately before detention and the vehicle constituting the train. The indwelling position associated with the identification ID is stored as indwelling information. When restarting after detention, the ground side system extracts the detention position of the vehicle from the detention information searched based on the vehicle identification ID, and sets the detention position where the vehicle to be restarted as a train is detained as a temporary position (initial Position) to the upper system. Thereby, the on-board controller 21 mounted on the train can recognize the position where the vehicle is placed as a temporary position (initial position) even when it is restarted after placement.

  Further, according to the above-described processing process, the vehicle upper system and the ground system are set depending on “vehicle identification ID for identifying the vehicle itself as hardware” and “train schedule (train operation schedule)”. Since the “changed train ID” can be easily associated, the information before and after the detention of each train can be associated with each other, and the information can be shared between the vehicle upper system and the ground system. That is, even if the train is restarted after detention, the ground system restarts the train position information (information indicating the detained position) stored immediately before (or immediately after) the train is detained. The temporary position (initial position) can be provided to the vehicle upper system.

  As described above, in the train control system according to the present embodiment, in order to simplify the zone transition or reduce the time required for communication, the communication method between the on-board control device and the base device is the vehicle Broadcast via the upper radio apparatus and the radio base station can be adopted. When wireless communication is performed by a broadcast method using wireless transmission, information does not necessarily reach the reception side in the same order as the transmission side transmits information (time-series order), but the train control system of the present embodiment Thus, the following points can be realized even when a broadcast wireless communication method is adopted for exchanging information between the vehicle-side system mounted on the train and the ground-side system.

(1) The communication partner can be recognized by the vehicle upper system and the ground system.
(2) The on-board system including the on-board controller mounted on the train can identify the freshness of the received ground-side information and can control the train using new information.
(3) The ground side system including each base device can identify the freshness of the received vehicle upper side information and can hold a new train position for each train.
(4) Each base device can share information with each other.
(5) Each base device can maintain consistency of control information output to each train.
(6) A train before and after detention can be uniquely identified, and a train that is restarted after detention can be made to recognize the position where the train is detained as a temporary position.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Network between bases, 2 (2A, 2B, 2C, ...) ... Network along a line, 11 ... Command station apparatus, 12 (12A, 12B, 12C, ...) ... Base station apparatus, 13 (13A1.13A2, ..., 13B1, 13B2, ..., 13C1, 13C2, ...) ... Wireless base station, 15 (15A, 15B, 15C, ...) ... Base control unit, 16 (16A, 16B, 16C, ...) ... Shared memory, 20 ... Network, 21 ... On-vehicle control device, 22 .. On-vehicle wireless device.

Claims (6)

In a train control system in which an on-board control device mounted on a train and a base device installed on the ground communicate wirelessly via a wireless device installed on the train and a plurality of wireless base stations installed on the ground,
The on-vehicle controller is
First transmission means for broadcasting train side information obtained by adding train identification information indicating the train to train state information indicating the current state of the train by a wireless device installed in the train;
First receiving means for receiving, by the wireless device, control information to which train identification information of the train broadcast from the wireless base station is added;
Train control means for controlling the train based on the control information to which the train identification information of the train received by the first receiving means is provided;
The base device is
Second receiving means for receiving information broadcast from a wireless device installed in the train by a plurality of wireless base stations;
Storage means for storing the train side information received by the second receiving means;
Generating means for generating control information for the train of the train identification information based on train state information included in the train-side information received by the second receiving means;
A second transmission means for broadcasting from the radio base station information obtained by adding the train identification information to the control information generated by the generation means,
A train control system characterized by that. The first transmission means of the on-board controller further broadcasts train-side information with a serial number indicating the newness of the train position information,
The generating means of the base device receives the serial number included in the train side information received by the second receiving means if it is newer than the serial number included in the train side information stored in the storage means. Generating control information for the train of the train identification information based on the train state information included in the train-side information,
The train control system according to claim 1, wherein: The generating means of the base device generates control information for the train of the train identification information based on the train side information received by the second receiving means, and a version number indicating newness is generated in the generated control information. Grant,
The second transmission unit of the base device broadcasts information from the radio base station that adds the train identification information to the control information to which the version information generated by the generation unit is added,
The train control means of the on-board controller controls the train based on control information to which the latest version information is given among the information received by the first receiving means.
The train control system according to claim 1, wherein the train control system is characterized in that The first transmission means of the on-board control device broadcasts train-side information to which base identification information indicating a base device recognized as a connection destination in addition to the train identification information is added,
The base device recognizes the on-board control device in which communication connection is established by the train identification information and the base identification information included in the train-side information received by the second receiving unit.
The train control system according to any one of claims 1 to 3, wherein the train control system is characterized. The second transmission means of the base device broadcasts information in which base control information indicating the base device is added to the control information in addition to the train identification information,
The on-board control device recognizes a base device with which communication connection has been established by the train identification information and the base identification information added to the control information received by the first receiving means.
The train control system according to any one of claims 1 to 3, wherein the train control system is provided. In a train control system in which an on-board control device mounted on a vehicle and a base device installed on the ground communicate wirelessly via a wireless device installed on the vehicle and a wireless base station installed on the ground,
The on-vehicle controller is
Detention position information indicating a detention position, first transmission means for transmitting detention information including train identification information given to a detained train and vehicle identification information indicating a vehicle of the detained train to the base device;
A second transmission means for transmitting a temporary position request to which the vehicle identification information indicating a vehicle constituting the train to be restarted is added to the base device when restarting after the detention;
Initial setting means for setting an initial position based on the temporary position information received from the base device,
The base device is
Storage means for storing the indwelling information received from the on-board control device;
Extracting means for extracting indwelling information stored in the storage means by vehicle identification identification information added to the temporary position request received from the on-board control device;
Third transmission means for transmitting indwelling position information included in the indwelling information extracted by the extracting means as temporary position information to a vehicle control device mounted on a vehicle of the vehicle identification information;
A train control system characterized by that.

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