Information transmission system, information transmission method, and program

Abstract

This invention provides an information transmission system, information transmission method, and program that enable stable information transmission in a wireless train control system, even when using public communication lines. [Solution] In the information transmission system, the onboard equipment includes a first safety device and a first transmission device, and a second safety device and a second transmission device. The first safety device supplies transmission data including train control information to the first transmission device. The first transmission device performs burst transmission of the transmission data supplied from the first safety device to a ground device via a public communication line. The second transmission device receives the transmission data transmitted by the burst transmission to the ground device and supplies the received transmission data to the second safety device. The second safety device performs predetermined processing to ensure the safety of the train based on the transmission data supplied from the second transmission device.

Description

Technical Field

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[0001] The present invention relates to an information transmission system, an information transmission method, and a program.

Background Art

[0008] This invention has been made in view of the above problems, and its objective is to provide an information transmission system, an information transmission method, and a program that enable stable information transmission in a wireless train control system even when using public communication lines. [Means for solving the problem]

[0009] One aspect of the present invention is an information transmission system for a wireless train control system in which an onboard device of a train equipped with a vehicle position detection function and a ground device installed on the ground perform train control using wireless communication. The onboard device has a first safety device and a first transmission device, and the ground device has a second safety device and a second transmission device. The first safety device supplies transmission data including train control information to the first transmission device. The first transmission device performs burst transmission of the transmission data supplied from the first safety device to the ground device via a public communication line. The second transmission device receives the transmission data transmitted by the burst transmission to the ground device and supplies the received transmission data to the second safety device. The second safety device performs predetermined processing to ensure train safety based on the transmission data supplied from the second transmission device.

[0010] One aspect of the present invention is an information transmission method for a wireless train control system in which an onboard device of a train equipped with a vehicle position detection function and a ground device installed on the ground perform train control using wireless communication. The onboard device includes a first safety step and a first transmission step, and the ground device includes a second safety step and a second transmission step. The first safety step supplies transmission data including train control information to the first transmission step, the first transmission step performs a burst transmission of the transmission data supplied from the first safety step to the ground device via a public communication line, the second transmission step receives the transmission data transmitted by the burst transmission to the ground device and supplies the received transmission data to the second safety step, and the second safety step performs a predetermined process to ensure the safety of the train based on the transmission data supplied from the second transmission step.

[0011] One aspect of the present invention is a program executable by an input / output device and a computer capable of exchanging information, wherein a train control system is performed using wireless communication between a train onboard device equipped with a self-vehicle position detection function and a ground device installed on the ground, the onboard device includes a first safety step and a first transmission step, and the ground device includes a second safety step and a second transmission step, the first safety step supplies transmission data including train control information to the first transmission step, the first transmission step performs a burst transmission of the transmission data supplied from the first safety step to the ground device via a public communication line, the second transmission step receives the transmission data transmitted by the burst transmission to the ground device and supplies the received transmission data to the second safety step, and the second safety step performs a predetermined process to ensure the safety of the train based on the transmission data supplied from the second transmission step. [Effects of the Invention]

[0012] According to the present invention, information transmission in a wireless train control system can be performed stably even when using a public communication line. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 shows an example of the configuration of the information transmission system 1. [Figure 2] Figure 2 shows an example of the configuration of the first safety device 21 of the on-board device 11. [Figure 3] Figure 3 is a flowchart showing the flow of burst transmission processing in the first transmission device 22. [Figure 4] Figure 4 shows the flow of transmission data transmitted during burst transmission processing. [Modes for carrying out the invention]

[0014] [One Embodiment] (Information transmission system) Figure 1 shows an example of the configuration of information transmission system 1 in a wireless train control system. Information transmission system 1 is composed of on-board equipment 11 and ground equipment 12.

[0015] The on-board equipment 11 is mounted on the train. The ground equipment 12 is installed in a ground facility. The on-board equipment 11 and the ground equipment 12 transmit and receive data, including control information such as the train's position and stopping position, via the public communication line 13, and perform predetermined processing to ensure the safety of the train.

[0016] The on-board equipment 11 includes a first safety device 21 and a first transmission device 22.

[0017] The first safety device 21 generates transmission data including control information such as information indicating the current position of the train and supplies it to the first transmission device 22. The first safety device 21 also performs predetermined processing to ensure the safety of the train based on the control information contained in the transmission data from the ground device 12 supplied by the first transmission device 22.

[0018] When transmission data is supplied from the first security device 21, the first transmission device 22 executes burst transmission of the transmission data to the ground device 12 via the public communication line 13. The first transmission device 22 also receives the transmission data transmitted by burst transmission from the ground device 12 to the on-vehicle device 11 and supplies it to the first security device 21.

[0019] The ground device 12 includes a second transmission device 31 and a second security device 32.

[0020] The second transmission device 31 receives the transmission data transmitted by burst transmission from the on-vehicle device 11 to the ground device 12 and supplies it to the second security device 32. When transmission data including control information such as information indicating a stop position is supplied from the second security device 32, the second transmission device 31 executes burst transmission of the transmission data to the on-vehicle device 11 via the public communication line 13.

[0021] The second security device 32 executes a predetermined process for ensuring the security of the train based on the control information included in the transmission data from the on-vehicle device 11 supplied from the second transmission device 31, and appropriately generates transmission data including control information such as information indicating a stop position and supplies it to the second transmission device 31. <00ness="bold">000095>

[0022] (Configuration example of the first security device 21) FIG. 2 is a diagram showing a configuration example of the first security device 21 of the on-vehicle device 11.

[0023] In the first security device 21, a CPU (Central Processing Unit) 501, a ROM (Read Only Memory) 502, and a RAM (Random Access Memory) 503 are interconnected by a bus 504.

[0024] The bus 504 is further connected to an input / output interface 505. The input / output interface 505 is connected to an input unit 506, an output unit 507, a storage unit 508, a communication unit 509, and a drive 510.

[0025] The input unit 506 consists of a keyboard, mouse, microphone, touch panel, input terminals, etc. The output unit 507 consists of a display, speaker, output terminals, etc. The storage unit 508 consists of a hard disk, RAM disk, non-volatile memory, etc. The communication unit 509 consists of a network interface, etc. The drive 510 drives a removable recording medium 511 such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory.

[0026] In the first safety device 21 configured as described above, the CPU 501 loads, for example, a program stored in the memory unit 508 into the RAM 503 via the input / output interface 505 and the bus 504, and executes it, thereby performing a series of processes. The RAM 503 also appropriately stores data necessary for the CPU 501 to perform various processes.

[0027] The program executed by the computer (CPU 501) can be provided by recording it on a removable recording medium 511, such as a packaged medium. The program can also be provided via wired or wireless transmission media, such as a local area network, the internet, or digital satellite broadcasting.

[0028] In a computer, a program can be installed in the storage unit 508 via the input / output interface 505 by inserting the removable recording medium 511 into the drive 510. Alternatively, a program can be received by the communication unit 509 via a wired or wireless transmission medium and installed in the storage unit 508. Furthermore, programs can be pre-installed in the ROM 502 or the storage unit 508.

[0029] The first transmission device 22 of the on-board device 11, and the second transmission device 31 and second safety device 32 of the ground device 12 have the same configuration as the first transmission device 22 of the on-board device 11, so their illustration and description are omitted.

[0030] (Burst transmission process) Next, the burst transmission process in the first transmission device 22 when transmitting data from the on-board device 11 to the ground device 12 will be explained with reference to the flowchart in Figure 3.

[0031] In step S1, the first transmission device 22 waits until it is supplied with transmission data from the first safety device 21.

[0032] When transmission data is supplied from the first safety device 21, in step S2, the first transmission device 22 starts a burst transmission of the transmission data supplied from the first safety device 21 (for example, train position information at time t1) to the ground device 12 via the public communication line 13.

[0033] In step S3, the first transmission device 22 waits until the next transmission data is supplied from the first safety device 21.

[0034] When the next transmission data (for example, train position information at time t2) is supplied from the first safety device 21, in step S4, the first transmission device 22 stops the burst transmission of the previous transmission data (burst transmission of train position information at time t1) and starts the burst transmission of the next transmission data to the ground device 12 via the public communication line 13.

[0035] The process then returns to step S3.

[0036] (Specific examples) A specific example of the burst transmission process in the first transmission device 22 when transmitting data from the on-board device 11 to the ground device 12, as described above, will be explained.

[0037] Figure 4 shows the flow of transmission data transmitted during burst transmission processing. In Figure 4, arrows indicate the direction of movement of the transmission data, and arrows with the same hatching indicate the same transmission data.

[0038] For example, when transmission data X(t1) at time t1 is supplied from the first security device 21 to the first transmission device 22 (step S1), burst transmission of the transmission data X(t1) to the ground device 12 via the public communication line 13 is initiated (step S2). This burst signal continues until the next transmission data is supplied from the first security device 21 to the first transmission device 22.

[0039] This burst transmission allows the second transmission device 31 of the ground device 12 to receive the transmission data X(t1) from the on-board device 11, and the second safety device 32 to perform predetermined safety processing based on the transmission data X(t1).

[0040] When transmission data X(t2) at time t2 is transmitted from the first security device 21 to the first transmission device 22 (step S3), the burst transmission of the previous transmission data X(t1) stops, and the burst transmission of transmission data X(t2) to the ground device 12 via the public communication line 13 begins (step S4). This burst signal continues until the next transmission data is supplied from the first security device 21 to the first transmission device 22.

[0041] This burst transmission allows the second transmission device 31 of the ground device 12 to receive the transmission data X(t2) from the on-board device 11, and the second safety device 32 to perform predetermined safety processing based on the transmission data X(t2).

[0042] Figures 3 and 4 illustrate the burst transmission process in the first transmission device 22 when transmitting data from the on-board device 11 to the ground device 12. The same process is performed in the second transmission device 31 when transmitting data from the ground device 12 to the on-board device 11.

[0043] [Supplementary explanation of the embodiment]

[0044] The embodiments described above are all preferred examples of the present invention. The numerical values, components, arrangement positions and connection configurations of the components, and processing order in the flowcharts shown in the following embodiments are examples only and are not intended to limit the present invention. Furthermore, the figures are not necessarily strictly illustrative.

[0045] The series of processes described above can be executed by hardware or by software. When the series of processes are executed by software, the programs that make up the software are installed from a program storage medium onto a computer that is built into dedicated hardware, or onto a general-purpose personal computer, for example, which can perform various functions by installing various programs.

[0046] The programs executed by the computer may be programs that are processed chronologically in the order described herein, or they may be programs that are processed in parallel or at necessary times, such as when a call is made.

[0047] [Note] The contents described in some of the embodiments above can be understood, for example, as follows:

[0048] (1) Transmission from the vehicle to the ground The information transmission system described above (Figure 1) In an information transmission system for a wireless train control system in which an on-board device 11 of a train equipped with a self-vehicle position detection function and a ground device 12 installed on the ground control the train using wireless communication, The on-board device 11 includes a first safety device 21 and a first transmission device 22. The ground device 12 has a second safety device 32 and a second transmission device 31. The first safety device 21 supplies transmission data, including the control information of the train, to the first transmission device 22. The first transmission device 22 performs a burst transmission of the transmission data supplied from the first security device 21 to the ground device 12 via the public communication line 13. The second transmission device 31 receives the transmission data transmitted by the burst transmission addressed to the ground device 12, and supplies the received transmission data to the second safety device 32. The second safety device 32 performs predetermined processing to ensure the safety of the train based on the transmission data supplied from the second transmission device 31.

[0049] In a wireless train control system where train control and information transmission functions are separated, the information transmission function allows for burst transmission of data from the first transmission device 22 of the on-board equipment 11 to the second transmission device 31 of the ground equipment 12 via a public communication line 13, thereby increasing the opportunities for the ground equipment 12 to receive the transmission data. This ensures the stability of information transmission.

[0050] (2) Continue transmission The first transmission device 22 can continue burst transmission of the transmission data supplied from the first security device 21 to the second transmission device 31 via the public communication line 13 until the next transmission data is transmitted from the first security device 21 (Figures 3 and 4).

[0051] In this way, the burst transmission of the previous transmission data continues until the transmission of the next transmission data is requested, making it possible to transmit the transmission data to the second safety device 32 more reliably.

[0052] (3) Transmission from the ground to the vehicle The second safety device 32 supplies transmission data, including the control information of the train, to the second transmission device 31. The second transmission device 31 performs a burst transmission of the transmission data supplied from the second safety device 32 to the on-board device 11 via the public communication line 13. The first transmission device 22 receives the transmission data that has been transmitted by burst transmission addressed to the on-board device 11, and supplies the received transmission data to the first safety device 21. The first safety device 21 can perform predetermined processing to ensure the safety of the train based on the transmission data supplied from the first transmission device 22.

[0053] In a wireless train control system where train control and information transmission functions are separated, the information transmission function allows for burst transmission of data from the second transmission device 31 of the ground equipment 12 to the first transmission device 22 of the on-board equipment 11 via a public network, thereby increasing the opportunities for the ground equipment 12 to receive the transmission data. This ensures the stability of information transmission. [Explanation of symbols]

[0054] 1. Information transmission system 11 Onboard equipment 12 Ground equipment 13 Public communication lines 21. First safety device 22 First transmission device 31. Second transmission device 32 Second safety device

Claims

1. In a wireless train control system information transmission system in which onboard equipment equipped with a vehicle position detection function and ground equipment installed on the ground control the train using wireless communication, The on-board equipment includes a first safety device and a first transmission device. The aforementioned ground equipment includes a second safety device and a second transmission device. The first safety device supplies transmission data including the control information of the train to the first transmission device. The first transmission device performs burst transmission of the transmission data supplied from the first security device to the ground device via a public communication line. The second transmission device receives the transmission data transmitted by the burst transmission addressed to the ground device, and supplies the received transmission data to the second safety device. The second safety device performs predetermined processing to ensure the safety of the train based on the transmission data supplied from the second transmission device. An information transmission system characterized by the following:

2. The information transmission system according to claim 1, The first transmission device continues the burst transmission of the transmission data supplied from the first security device to the second transmission device via the public communication line until the next transmission data is transmitted from the first security device. An information transmission system characterized by the following:

3. An information transmission system according to claim 1 or 2, The second safety device supplies the transmission data, including the control information of the train, to the second transmission device. The second transmission device performs the burst transmission of the transmission data supplied from the second safety device to the on-board device via a public communication line. The first transmission device receives the transmission data transmitted by the burst transmission addressed to the on-board device, and supplies the received transmission data to the first safety device. The first safety device performs predetermined processing to ensure the safety of the train based on the transmission data supplied from the first transmission device. An information transmission system characterized by the following:

4. In a wireless train control system where onboard equipment equipped with a vehicle position detection function and ground equipment installed on the ground control the train using wireless communication, The processing of the on-board device includes a first safety step and a first transmission step, The processing of the ground equipment includes a second safety step and a second transmission step, The first safety step supplies transmission data including the control information of the train to the first transmission step. The first transmission step performs a burst transmission of the transmission data supplied by the first security step to the ground equipment via a public communication line. The second transmission step receives the transmission data transmitted by the burst transmission addressed to the ground device, and supplies the received transmission data to the second security step. The second safety step performs predetermined processing to ensure the safety of the train based on the transmission data supplied by the second transmission step. A method for transmitting information characterized by the following features.

5. In a program executable by a computer capable of exchanging information and input / output devices, in which onboard equipment of a train equipped with a vehicle position detection function and ground equipment installed on the ground use wireless communication to control the train, The processing of the on-board device includes a first safety step and a first transmission step, The processing of the ground equipment includes a second safety step and a second transmission step, The first safety step supplies transmission data including the control information of the train to the first transmission step. The first transmission step performs a burst transmission of the transmission data supplied from the first security step to the ground equipment via a public communication line. The second transmission step receives the transmission data transmitted by the burst transmission addressed to the ground device, and supplies the received transmission data to the second security step. The second safety step performs predetermined processing to ensure the safety of the train based on the transmission data supplied from the second transmission step. Characterized by, A program that instructs a computer to perform a process.

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