Train radio communication system, base station device, and opposing device

Abstract

This train radio communication system comprises a mobile station device (30) mounted on a train, and a central station device (10) and a base station device (20) installed on the ground. In a normal state, the base station device (20) transfers a telegram transmitted from the central station device (10) to the mobile station device (30), and transfers a telegram transmitted from the mobile station device (30) to the central station device (10). When the central station device (10) is tested, the base station device (20) switches the transfer destination of the telegram transmitted from the central station device (10) to a counterpart device (40) for testing.

Description

Technical Field

[0001] The present disclosure relates to a train wireless communication system , Base Station Device and Opposing Device and particularly to a method for verifying the functional soundness of a central office device.

Background Art

[0002] As a method for verifying the functional soundness of a train wireless communication system that performs communication between a train and ground facilities (referred to as "ground-to-train communication"), there is a method of using a pseudo mobile station device that simulates a mobile station device mounted on a train for a test opposing device (for example, Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a train wireless communication system, communication between a central office device and a mobile station device on the train is performed via a base station device, and is realized by converting wired communication and wireless communication in the base station device. In a conventional train wireless communication system, in a test for verifying the functional soundness of functions such as voice communication and data communication of a central office device, a wireless communication device corresponding to a mobile station device is used as an opposing device. Therefore, in a test of a central office device of a conventional train wireless communication system, the opposing device needs to be located at a place where it can communicate with the base station device, and is subject to geographical constraints.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a train wireless communication system capable of performing a test of a central office device without being subject to geographical constraints.

Means for Solving the Problems

[0006] The train radio communication system according to the present disclosure includes a mobile station device mounted on a train, a central station device installed on the ground, and a base station device installed on the ground that transfers a message transmitted from the central station device to the mobile station device and transfers a message transmitted from the mobile station device to the central station device. When a test of the central station device is performed, the base station device Upon receiving a message indicating a return registration to the test opposing device, switches the transfer destination of the message transmitted from the central station device to the a counter device.

Advantages of the Invention

[0007] According to the present disclosure, since it is not necessary to perform wireless reception between the counter device and the base station in the test, the test of the central station device can be carried out without being subject to geographical restrictions.

[0008] The object, features, aspects, and advantages of the present disclosure will become clearer from the following detailed description and the accompanying drawings.

Brief Description of the Drawings

[0009]

Figure 1

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Mode for Carrying Out the Invention

[0010] <Embodiment 1> FIG. 1 is a configuration diagram of a train radio communication system according to Embodiment 1. The train radio communication system according to Embodiment 1 includes a central office apparatus 10 installed in a ground central office, a base station apparatus 20 installed in a ground base station, a mobile station apparatus 30 mounted on a train which is a mobile station, and an opposing apparatus 40 used for a soundness test (hereinafter, may be simply referred to as "test") of the central office apparatus 10. Here, the base station apparatus 20 may include a new base station apparatus 20N newly introduced into the train radio communication system according to Embodiment 1 and an old base station apparatus 20L not updated from the conventional system.

[0011] Communication between the central office apparatus 10 and the base station apparatus 20 is performed by a first communication method which is a communication method of a conventional wired section. Communication between the base station apparatus 20 and the mobile station apparatus 30 is performed by a second communication method which is a communication method of a conventional wireless section. The opposing apparatus 40 communicates with the new base station apparatus 20N among the base station apparatuses 20, and communication between the new base station apparatus 20N and the opposing apparatus 40 is performed by a third communication method which is a newly added communication method of a wired section.

[0012] One central office where a central office device 10 is installed is provided in the train radio communication system. There is a command center in the central office for managing the operation of trains. The dispatcher can use the command telephone in the command center to make calls to the train crew or receive incoming calls from the train crew. Also, there is a maintenance terminal for the train radio communication system in the command center, and the dispatcher can use the maintenance terminal to monitor and control the states of the central office device 10, the base station device 20, and the mobile station device 30.

[0013] A plurality of base stations where base station devices 20 for controlling communication between the central office device 10 and the mobile station device 30 are installed are placed under the central office. Among the base station devices 20, the new base station device 20N controls not only the communication between the central office device 10 and the mobile station device 30 but also the communication between the central office device 10 and the opposing device 40. Therefore, the new base station device 20N can perform the mutual conversion between the communication of the first communication method and the communication of the second communication method, and in addition, can perform the mutual conversion between the communication of the first communication method and the communication of the third communication method. On the other hand, the old base station device 20L controls only the communication between the central office device 10 and the mobile station device 30. Therefore, the old base station device 20L performs only the mutual conversion between the communication of the first communication method and the communication of the second communication method.

[0014] Hereinafter, for the sake of simplifying the explanation, it is assumed that all the base station devices 20 are new base station devices 20N. Therefore, the "base station device 20" in the following explanation shall be a new base station device 20N.

[0015] A mobile station device 30 for communicating with the central office device 10 is installed on the train. The train crew can use the operation panel provided on the mobile station device 30 to talk to the dispatcher who operates the central office device 10 in the central office. The first communication method and the second communication method are used for the communication between the central office device 10 and the mobile station device 30.

[0016] The opposing device 40 is a test device used for the soundness test of the central office device 10 and is a pseudo-mobile station device having the same functions as the mobile station device 30. The opposing device 40 is connected to the base station device 20. For the communication between the central office device 10 and the opposing device 40, the first communication method and the third communication method are used.

[0017] Figure 2 is a block diagram of the central office device 10. The central office device 10 includes a call control unit 11, a monitoring control unit 12, and a communication control unit 13.

[0018] The call control unit 11 controls the command telephone. For example, the call control unit 11 instructs the communication control unit 13 to make a call to the base station device 20 according to the operation of the command telephone by the operator. Also, the call control unit 11 controls the command telephone according to the signal received by the communication control unit 13 from the base station device 20.

[0019] The monitoring control unit 12 controls the maintenance terminal. For example, the monitoring control unit 12 monitors and controls the base station device 20 and the mobile station device 30 via the communication control unit 13 according to the operation of the maintenance terminal by the operator, and controls the maintenance terminal according to the result.

[0020] Figure 3 is a block diagram of the base station device 20. The base station device 20 includes a communication control unit 21, a multiplexing unit 22, and a wireless communication unit 23.

[0021] The communication control unit 21 terminates the wired communication with the central office device 10 and the opposing device 40. Further, the communication control unit 21 can switch whether to transfer a telegram from the central office device 10 to the mobile station device 30 or to the opposing device 40 (transferring a telegram from the central office device 10 to the opposing device 40 is sometimes referred to as "folding back"). Specifically, the communication control unit 21 can register "folding-back registration information" (sometimes referred to as "folding-back registration information for the opposing device 40") for switching whether to transfer a telegram from the central office device 10 to the mobile station device 30 or to fold it back to the opposing device 40. When no folding-back registration information is registered, the communication control unit 21 transmits an off-route telegram to the multiplexing unit 22 to transmit the telegram received from the central office device 10 to the opposing device 40. When the folding-back registration information is registered, the communication control unit 21 transfers the telegram received from the central office device 10 to the opposing device 40. Further, the communication control unit 21 transmits a telegram received from the multiplexing unit 22 or the opposing device 40 to the central office device 10.

[0022] The multiplexing unit 22 multiplexes a plurality of telegrams received from the communication control unit 21 and transmits the multiplexed telegram to the wireless communication unit 23 in the form of a radio frame. Further, the multiplexing unit 22 separates the radio frame received from the wireless communication unit 23 into a plurality of telegrams and transmits the separated plurality of telegrams to the communication control unit 21.

[0023] The wireless communication unit 23 terminates the wireless communication with the mobile station device 30. Specifically, the wireless communication unit 23 transmits the radio frame received from the multiplexing unit 22 to the mobile station device 30. Further, the wireless communication unit 23 transmits the radio frame received from the mobile station device 30 to the multiplexing unit 22.

[0024] FIG. 4 is a block diagram of the mobile station device 30. The mobile station device 30 includes a wireless communication unit 31, a multiplexing unit 32, a call control unit 33, a terminal control unit 34, and a voice control unit 35.

[0025] The wireless communication unit 31 terminates the wireless communication with the base station apparatus 20. Specifically, the wireless communication unit 31 transmits the wireless frame received from the base station apparatus 20 to the multiplexing unit 32. Also, the wireless communication unit 31 transmits the wireless frame received from the multiplexing unit 32 to the base station apparatus 20.

[0026] The multiplexing unit 32 separates the wireless frame received from the wireless communication unit 31 into a plurality of telegrams, and transmits the plurality of separated telegrams to the call control unit 33, the terminal control unit 34, or the voice control unit 35 according to the content of the telegram. Also, the multiplexing unit 32 multiplexes the plurality of telegrams received from the call control unit 33, the terminal control unit 34, or the voice control unit 35, and transmits the multiplexed telegram to the wireless communication unit 31 in the form of a wireless frame.

[0027] The call control unit 33 manages the call state with other stations via the terminal control unit 34 and the wireless communication unit 31.

[0028] The voice control unit 35 decodes the voice signal received from the multiplexing unit 32, and transmits the decoded voice signal to the operation panel via the terminal control unit 34. Also, the voice control unit 35 encodes the voice signal received from the operation panel via the terminal control unit 34, and transmits the encoded voice signal to other stations via the multiplexing unit 32 and the wireless communication unit 31.

[0029] The terminal control unit 34 controls the operation panel. For example, the terminal control unit 34 receives a call from the call control unit 33 and instructs the operation panel to receive an incoming call. Also, the terminal control unit 34 receives a call from the operation panel and transmits the call to other stations via the call control unit 33.

[0030] FIG. 5 is a block diagram of the opposing apparatus 40. The opposing apparatus 40 includes a communication control unit 41, a monitoring control unit 42, a call control unit 43, a voice control unit 44, and an operation unit 45.

[0031] The communication control unit 41 terminates the wired communication with the base station device 20. Specifically, the communication control unit 41 transmits the telegram received from the base station device 20 to the monitoring control unit 42, the call control unit 43, or the voice control unit 44 according to the content of the telegram. Also, the communication control unit 41 transmits the telegram received from the monitoring control unit 42, the call control unit 43, or the voice control unit 44 to the base station device 20.

[0032] The monitoring control unit 42 generates information on the faults and states used in the test, and transmits the generated information to the communication control unit 41.

[0033] The call control unit 43 manages the call state with other stations via the operation unit 45 and the communication control unit 41.

[0034] The voice control unit 44 decodes the voice signal received from the base station device 20, and sends the decoded voice signal to the operation unit 45. Also, the voice control unit 44 encodes the voice signal input from the operation unit 45, and transmits the encoded voice signal to the communication control unit 41.

[0035] The operation unit 45 is an operation interface corresponding to an operation panel, and in response to a call from a command telephone, instructs the call control unit 43 to make an outgoing call to another station.

[0036] FIG. 6 is a sequence diagram showing the operation of the train radio communication system according to Embodiment 1. Hereinafter, based on FIG. 6, the operation of the train radio communication system according to Embodiment 1 will be described.

[0037] When the folding registration information from the communication control unit 21 of the base station device 20 to the opposing device 40 is not registered, communication is performed between the mobile station device 30 and the central station device 10. That is, the telegram transmitted by the mobile station device 30 in the second communication method is received by the base station device 20, and the base station device 20 transfers it to the central station device 10 in the first communication method (step ST101). Also, the telegram transmitted by the central station device 10 in the first communication method is received by the base station device 20, and the base station device 20 transfers it to the mobile station device 30 in the second communication method (step ST102).

[0038] Specifically, in step ST101, the wireless communication unit 31 of the mobile station device 30 transmits a telegram in the form of a radio frame to the wireless communication unit 23 of the base station device 20 using the second communication method. The wireless communication unit 23 of the base station device 20 transmits the received radio frame to the multiplexing unit 22, and the multiplexing unit 22 separates the telegram from the radio frame. The multiplexing unit 22 transmits the separated telegram to the communication control unit 21. Since the fold-back registration information is not registered, the communication control unit 21 determines that the telegram is addressed to the central office device 10 and transfers the telegram to the communication control unit 13 of the central office device 10.

[0039] Also, in step ST102, the communication control unit 13 of the central office device 10 transmits a telegram to the communication control unit 21 of the base station device 20 using the first communication method. Since the fold-back registration information is not registered, the communication control unit 21 of the base station device 20 determines that the received telegram is addressed to the mobile station device 30 and transmits the telegram to the multiplexing unit 22. The multiplexing unit 22 multiplexes the telegram and transmits it to the wireless communication unit 23 in the form of a radio frame. The wireless communication unit 23 transmits the radio frame to the wireless communication unit 31 of the mobile station device 30 using the second communication method.

[0040] When testing the central office device 10, first, the opposing device 40 transmits a telegram indicating fold-back registration to the opposing device 40 to the base station device 20 using the third communication method. When the base station device 20 receives a telegram indicating fold-back registration from the opposing device 40, it changes the transfer destination of the telegram received from the central office device 10 from the mobile station device 30 to the test opposing device 40 (step ST103). This enables the testing of the central office device 10 using the opposing device 40.

[0041] Specifically, in step ST103, the monitoring control unit 42 of the opposing device 40 transmits a telegram indicating fold-back registration to the opposing device 40 to the communication control unit 41. The communication control unit 41 transmits the telegram to the communication control unit 21 of the base station device 20. When the communication control unit 21 of the base station device 20 receives a telegram indicating fold-back registration, it registers the fold-back registration information and switches the transfer destination of the telegram received from the central office device 10 to the test opposing device 40.

[0042] Subsequently, the opposing device 40 transmits a message to the base station device 20 using the third communication method. The message transmitted from the opposing device 40 is received by the base station device 20, and the base station device 20 transfers it to the central office device 10 using the first communication method (step ST104).

[0043] Specifically, in step ST104, the communication control unit 41 of the opposing device 40 transmits a message to the communication control unit 21 of the base station device 20 using the third communication method. Since the fold-back registration information is being registered, the communication control unit 21 of the base station device 20 transmits the message to the communication control unit 13 of the central office device 10 using the first communication method.

[0044] During the test, if a message is transmitted from the mobile station device 30 using the second communication method, the message is received by the base station device 20, but the base station device 20 discards it without transferring it to the central office device 10 (step ST105).

[0045] Specifically, in step ST105, the wireless communication unit 31 of the mobile station device 30 transmits a message to the wireless communication unit 23 of the base station device 20 using the second communication method. The wireless communication unit 23 of the base station device 20 transmits the received wireless frame to the multiplexing unit 22, and the multiplexing unit 22 separates the message from the wireless frame. The multiplexing unit 22 transmits the separated message to the communication control unit 21. Since the fold-back registration information is being registered, the communication control unit 21 discards the received message.

[0046] Also, during the test, when the central office device 10 transmits a message using the first communication method, the message is received by the base station device 20, and the base station device 20 transfers it to the opposing device 40 using the third communication method (step ST106).

[0047] Specifically, in step ST106, the communication control unit 13 of the central office device 10 transmits a message to the communication control unit 21 of the base station device 20 using the first communication method. Since the fold-back registration information is being registered, the communication control unit 21 of the base station device 20 determines that the message is addressed to the opposing device 40 and transfers the message to the communication control unit 41 of the opposing device 40 using the third communication method.

[0048] By the processes of step ST104 and step ST106, it becomes possible to conduct a call test between the command telephone of the central office device 10 and the opposing device 40, and a test for monitoring the state of the opposing device 40 from the maintenance terminal, and the functional soundness of the central office device 10 can be confirmed. During the test, as shown in step ST105, since the base station device 20 does not transfer the telegram from the mobile station device 30 to the central office device 10, the mobile station device 30 cannot be online with the base station device 20, and communication between the mobile station device 30 and the central office device 10 is not performed.

[0049] When ending the test, the opposing device 40 transmits a telegram meaning a turn-back stop to the base station device 20 by the third communication method. When the base station device 20 receives the telegram meaning a turn-back stop, it returns the transfer destination of the telegram from the central office device 10 to the mobile station device 30 (step ST107). As a result, the mobile station device 30 can be online with the base station device 20, and communication between the mobile station device 30 and the central office device 10 becomes possible. On the other hand, the opposing device 40 becomes unusable.

[0050] Specifically, in step ST107, the monitoring control unit 42 of the opposing device 40 transmits a telegram meaning a turn-back stop to the communication control unit 41. The communication control unit 41 transmits the said telegram to the communication control unit 21 of the base station device 20. When the communication control unit 21 of the base station device 20 receives the telegram meaning a turn-back stop, it switches the transfer destination of the telegram from the central office device 10 to the mobile station device 30 by canceling the registration of the turn-back registration information.

[0051] The above test can be implemented for each of a plurality of base station devices 20.

[0052] As described above, the test of the central office device 10 in the train radio communication system according to Embodiment 1 is performed by the base station device 20 relaying the message from the central office device 10 to the opposing device 40. Therefore, in this test, the second communication method, which is a wireless communication method, is not used, and only the first communication method and the third communication method, which are wired communication methods, are used. Therefore, the test of the central office device 10 can be performed without being subject to geographical restrictions.

[0053] <Embodiment 2> In Embodiment 1, the communication between the central office device 10 and the new base station device 20N is performed using the first communication method, which is the communication method of the conventional wired section, in the same manner as the communication between the central office device 10 and the old base station device 20L. Therefore, it was necessary to exclusively switch the operation mode of the new base station device 20N that relays the message from the central office device 10 to the mobile station device 30 and the operation mode of the new base station device 20N that relays the message from the central office device 10 to the opposing device 40 for the test.

[0054] In Embodiment 2, as the communication method between the central office device 10 and the new base station device 20N, a new fourth communication method that can specify the destination of the message is introduced, and further, a communication method that can specify the destination of the message is also adopted for the third communication method between the new base station device 20N and the opposing device 40. Thereby, it becomes possible to dynamically switch whether the base station device 20 transfers the message from the central office device 10 to the mobile station device 30 or relays it to the opposing device 40.

[0055] FIG. 7 is a configuration diagram of the train radio communication system of Embodiment 1. In the train radio communication system of FIG. 7, the communication between the central office device 10 and the new base station device 20N is performed using the newly added fourth communication method. Other configurations are the same as those in FIG. 1.

[0056] FIG. 8 is a block diagram of the central office apparatus 10 according to Embodiment 2. In the central office apparatus 10 of Embodiment 2, the communication control unit 13 includes a train radio protocol management unit 131 and a general-purpose protocol management unit 132. The train radio protocol management unit 131 manages the transmission and reception of messages in the train radio communication system, identifies the destination of the received message, and assigns an identifier for identifying the destination to the message transmitted by the central office apparatus 10. The general-purpose protocol management unit 132 manages general-purpose protocols such as TCP / IP.

[0057] FIG. 9 is a block diagram of the new base station apparatus 20N according to Embodiment 2. In the new base station apparatus 20N of Embodiment 2, the communication control unit 21 includes a train radio protocol management unit 211 and a general-purpose protocol management unit 212. The train radio protocol management unit 211 manages the transmission and reception of messages in the train radio communication system, identifies the destination of the received message, and switches the transfer destination of the message according to the destination. The general-purpose protocol management unit 212 manages general-purpose protocols such as TCP / IP.

[0058] FIG. 10 is a block diagram of the opposing apparatus 40 according to Embodiment 2. In the opposing apparatus 40 of Embodiment 2, the communication control unit 41 includes a train radio protocol management unit 411 and a general-purpose protocol management unit 412. The train radio protocol management unit 411 manages the transmission and reception of messages in the train radio system, identifies the destination of the received message, and assigns an identifier for identifying the destination to the message transmitted by the opposing apparatus 40. The general-purpose protocol management unit 412 manages general-purpose protocols such as TCP / IP.

[0059] FIG. 11 is a diagram showing a data format used in the communication between the central office apparatus 10 and the new base station apparatus 20N in Embodiment 2. The application data is data generated by the call control unit 11 and the monitoring control unit 12 of the central office apparatus 10, or the monitoring control unit 12 and the call control unit 33 of the mobile station apparatus 30.

[0060] The train radio protocol header is assigned and interpreted by the train radio protocol management unit 131 of the central office device 10, the train radio protocol management unit 211 of the new base station device 20N, or the train radio protocol management unit 411 of the opposing device 40. The train radio protocol header includes an application type, a destination, and extension information. An identifier for identifying the mobile station device 30 and the opposing device 40 is set as the destination. The central office device 10 can determine the transfer destination of the received telegram by interpreting the destination of the train radio protocol header assigned to the received telegram.

[0061] The general-purpose protocol header is assigned and interpreted by the general-purpose protocol management unit 132 of the central office device 10 or the general-purpose protocol management unit 212 of the new base station device 20N. Information indicating a general-purpose protocol such as a UDP header or an IP header is set in the general-purpose protocol header.

[0062] FIG. 12 is a sequence diagram showing the operation of the train radio communication system according to Embodiment 2. Hereinafter, the operation of the train radio communication system according to Embodiment 2 will be described with reference to FIG. 12. Here too, for the sake of simplifying the explanation, it is assumed that all the base station devices 20 are new base station devices 20N. Therefore, the "base station device 20" in the following description shall be a new base station device 20N.

[0063] When the test of the central office device 10 is not being performed, the central office device 10 sets the identifier of the mobile station device 30 as the destination of the train radio protocol header of the telegram transmitted by the fourth communication method. Also, the base station device 20 sets the central office device 10 as the destination of the train radio protocol header of the telegram received from the mobile station device 30. Therefore, when the telegram transmitted by the mobile station device 30 by the second communication method is received by the base station device 20, the base station device 20 transfers it to the central office device 10 by the fourth communication method (step ST201). Also, when the telegram transmitted by the central office device 10 by the fourth communication method is received by the base station device 20, the base station device 20 transfers it to the mobile station device 30 by the second communication method (step ST202).

[0064] When testing the central office device 10, first, the opposing device 40 transmits a message addressed to the base station device 20 indicating loopback registration using the third communication method. When the base station device 20 receives the message, the base station device 20 registers the identifier of the opposing device 40 as the transfer destination of the message received from the central office device 10 (step ST203). As a result, the base station device 20 becomes capable of transferring the message received from the central office device 10 to the opposing device 40, and the central office device 10 can be tested using the opposing device 40.

[0065] Specifically, in step ST203, the monitoring control unit 42 of the opposing device 40 transmits a message indicating loopback registration to the train radio protocol management unit 411. The train radio protocol management unit 411 sets the destination of the train radio protocol header to the base station device 20 and transmits the message to the general-purpose protocol management unit 412. The general-purpose protocol management unit 412 transmits the message to the general-purpose protocol management unit 212 of the base station device 20. When the general-purpose protocol management unit 212 of the base station device 20 receives the message, it transmits the message to the train radio protocol management unit 411. Since the destination of the train radio protocol header of the message is the base station device 20, the train radio protocol management unit 411 interprets the message. When the train radio protocol management unit 411 interprets that the message indicates loopback registration, it recognizes that the opposing device 40 is online.

[0066] Subsequently, the opposing device 40 transmits a message to the base station device 20 using the third communication method. When the message transmitted from the opposing device 40 is received by the base station device 20, the base station device 20 sets the identifier of the central office device 10 in the train radio protocol header and transfers the message to the central office device 10 using the fourth communication method (step ST204).

[0067] Specifically, in step ST204, the call control unit 43 of the opposing device 40 transmits a message to the train radio protocol management unit 411. The train radio protocol management unit 411 sets the destination of the train radio protocol header to the central office device 10 and transmits the message to the general-purpose protocol management unit 412. The general-purpose protocol management unit 412 transmits the message to the general-purpose protocol management unit 212 of the base station device 20. When the general-purpose protocol management unit 212 of the base station device 20 receives the message, it transmits the message to the train radio protocol management unit 211. Since the destination of the train radio protocol header of the message is the central office device 10, the train radio protocol management unit 211 sets the destination of the train radio protocol header to the central office device 10 and transmits the message to the general-purpose protocol management unit 212. The general-purpose protocol management unit 212 transmits the message to the general-purpose protocol management unit 132 of the central office device 10. As a result, the message transmitted by the opposing device 40 is received by the central office device 10.

[0068] During the test, if a message is transmitted from the mobile station device 30 using the second communication method and the base station device 20 receives the message, the base station device 20 sets the identifier of the central office device 10 as the destination of the train radio protocol header and transfers the message to the central office device 10 using the fourth communication method (step ST205), as in the case when the test is not being conducted.

[0069] Specifically, in step ST205, the wireless communication unit 31 of the mobile station device 30 transmits a telegram in the form of a radio frame to the wireless communication unit 23 of the base station device 20 using the second communication method. The wireless communication unit 23 of the base station device 20 transmits the received radio frame to the multiplexing unit 22, and the multiplexing unit 22 separates the telegram from the radio frame. The multiplexing unit 22 transmits the separated telegram to the train radio protocol management unit 211. The train radio protocol management unit 211 determines that all the telegrams received from the multiplexing unit 22 are addressed to the central office device 10, sets the destination of the train radio protocol header to the central office device 10, and transmits the telegram to the general-purpose protocol management unit 212. The general-purpose protocol management unit 212 transmits the telegram to the general-purpose protocol management unit 212 of the central office device 10. As a result, the telegram transmitted by the mobile station device 30 is received by the central office device 10. The above step ST101 is also implemented by the same process.

[0070] Also, during the test, when the central office device 10 transmits a telegram addressed to the counter device 40, the central office device 10 sets the identifier of the counter device 40 as the destination of the train radio protocol header of the telegram to be transmitted, and transmits the telegram using the fourth communication method. When the telegram is received by the base station device 20, the base station device 20 transfers it to the counter device 40 using the third communication method (step ST206).

[0071] Specifically, in step ST206, the train radio protocol management unit 131 of the central office device 10 sets the destination of the train radio protocol header to the opposing device 40 and transmits the message to the general-purpose protocol management unit 132. The general-purpose protocol management unit 132 transmits the message to the general-purpose protocol management unit 212 of the base station device 20. When the general-purpose protocol management unit 212 of the base station device 20 receives the message, it transmits the message to the train radio protocol management unit 211. Since the destination of the train radio protocol header of the message is the opposing device 40 and the opposing device 40 is in an online state, the train radio protocol management unit 211 sets the destination of the train radio protocol header to the opposing device 40 and transmits the message to the general-purpose protocol management unit 212. The general-purpose protocol management unit 212 transmits the message to the general-purpose protocol management unit 412 of the opposing device 40. As a result, the message addressed to the opposing device 40 transmitted by the central office device 10 is received by the opposing device 40.

[0072] Also, during the test, when the central office device 10 transmits a message addressed to the mobile station device 30, the central office device 10 sets the identifier of the mobile station device 30 as the destination of the train radio protocol header of the message to be transmitted, in the same manner as when the test is not being conducted, and transmits the message using the fourth communication method. When the message is received by the base station device 20, the base station device 20 transfers it to the mobile station device 30 using the second communication method (step ST207).

[0073] Specifically, in step ST207, the train radio protocol management unit 131 of the central office device 10 sets the destination of the train radio protocol header to the mobile station device 30 and transmits the message to the general-purpose protocol management unit 132. The general-purpose protocol management unit 132 transmits the message to the general-purpose protocol management unit 212 of the base station device 20. When the general-purpose protocol management unit 212 of the base station device 20 receives the message, it transmits the message to the train radio protocol management unit 211. Since the destination of the train radio protocol header of the message is the mobile station device 30, the train radio protocol management unit 211 transmits the message to the multiplexing unit 22. The multiplexing unit 22 multiplexes the received message and transmits it to the wireless communication unit 23 in the form of a wireless frame. The wireless communication unit 23 transmits the wireless frame to the wireless communication unit 31 of the mobile station device 30 using the second communication method. As a result, the message addressed to the mobile station device 30 transmitted by the central office device 10 is received by the mobile station device 30 in the form of a wireless frame. The above step ST102 is also implemented by the same process.

[0074] Steps ST204 and ST206 enable a call test between the command telephone of the central office device 10 and the opposing device 40 and a status monitoring test of the opposing device 40 from the maintenance terminal, and the functional soundness of the central office device 10 can be confirmed. In this embodiment, as shown in step ST205, even during the test, the base station device 20 can transfer the message transmitted from the mobile station device 30 to the central office device 10, so the mobile station device 30 is online with the base station device 20 and can communicate with the central office device 10.

[0075] When ending the test, the opposing device 40 transmits a message addressed to the base station device 20 indicating a turn-back stop using the third communication method. When the base station device 20 receives the message indicating a turn-back stop, it deletes the identifier of the opposing device 40 registered as the transfer destination of the message received from the central office device 10 (step ST208). As a result, the opposing device 40 becomes unusable.

[0076] Specifically, in step ST208, the monitoring control unit 42 of the opposing device 40 transmits a telegram meaning a folding stop to the train radio protocol management unit 411. The train radio protocol management unit 411 sets the destination of the train radio protocol header to the base station device 20 and transmits the telegram to the general-purpose protocol management unit 412. The general-purpose protocol management unit 412 transfers the telegram to the general-purpose protocol management unit 212 of the base station device 20. The general-purpose protocol management unit 212 of the base station device 20 transmits the telegram to the train radio protocol management unit 211. Since the destination of the train radio protocol header of the telegram is the base station device 20, the train radio protocol management unit 211 interprets the telegram. When the train radio protocol management unit 211 interprets that the telegram means cancellation of folding registration, it recognizes that the opposing device 40 is offline.

[0077] In this way, the test of the central office device 10 in the train radio communication system according to the second embodiment is performed by the base station device 20 folding back the telegram from the central office device 10 to the opposing device 40. Therefore, in this test, the second communication method, which is a wireless communication method, is not used, and only the third communication method and the fourth communication method, which are wired communication methods, are used. Therefore, the test of the central office device 10 can be performed without being subject to geographical restrictions.

[0078] Also, the train radio protocol management unit 131 of the central office device 10, the train radio protocol management unit 211 of the base station device 20, and the train radio protocol management unit 411 of the opposing device 40 manage the destinations of the telegrams transmitted and received within the train radio communication system, so that the base station device 20 can dynamically switch the transfer destination of the telegram from the central office device 10 according to the destination. Therefore, since communication can be performed between the mobile station device 30 and the central office device 10 even during the test, the mobile station device 30 can also be kept online during the test.

[0079] It should be noted that the respective embodiments can be freely combined, or each embodiment can be appropriately modified or omitted.

[0080] The above description is illustrative in all aspects and is to be understood as allowing for innumerable variations not illustrated.

Description of Signs

[0081] 10 Central office device, 11 Call control unit, 12 Monitoring control unit, 13 Communication control unit, 131 Train radio protocol management unit, 132 General-purpose protocol management unit, 20 Base station device, 20N New base station device, 20L Old base station device, 21 Communication control unit, 211 Train radio protocol management unit, 212 General-purpose protocol management unit, 22 Multiplexing unit, 23 Wireless communication unit, 30 Mobile station device, 31 Wireless communication unit, 32 Multiplexing unit, 33 Call control unit, 34 Terminal control unit, 35 Voice control unit, 40 Opposing device, 41 Communication control unit, 411 Train radio protocol management unit, 412 General-purpose protocol management unit, 42 Monitoring control unit, 43 Call control unit, 44 Voice control unit, 45 Operation unit.

Claims

1. A mobile station device mounted on a train, A central station device installed on the ground, A base station device installed on the ground that transfers a telegram transmitted from the central station device to the mobile station device and transfers a telegram transmitted from the mobile station device to the central station device, Comprising, When the test of the central station device is being conducted, when the base station device receives a telegram indicating a return registration to a test counter device, the base station device switches the transfer destination of the telegram transmitted from the central station device to the counter device, A train radio communication system.

2. A mobile station device mounted on a train, A central station device installed on the ground, A base station device installed on the ground that transfers a telegram transmitted from the central station device to the mobile station device and transfers a telegram transmitted from the mobile station device to the central station device, Comprising, When the test of the central station device is being conducted, the base station device switches the transfer destination of the telegram transmitted from the central station device to a test counter device, The communication between the mobile station device and the base station device is performed by wireless communication, The communication between the central station device and the base station device and the communication between the base station device and the counter device are performed by wired communication, A train radio communication system.

3. A mobile station device mounted on a train, A central station device installed on the ground, A base station device installed on the ground that transfers a telegram transmitted from the central station device to the mobile station device and transfers a telegram transmitted from the mobile station device to the central station device, Comprising, When the test of the central station device is being conducted, the base station device switches the transfer destination of the telegram transmitted from the central station device to a test counter device, When the test of the central station device is being conducted, the central station device transmits a telegram with an identifier indicating whether the destination is the mobile station device or the counter device to the base station device, and the base station device switches the transfer destination of the telegram received from the central station device according to the destination indicated by the identifier of the telegram, A train radio communication system.

4. Even when the test of the central station device is being conducted, the base station device transfers the telegram transmitted from the central station device to the mobile station device, The train radio communication system according to Claim 3.

5. A base station device installed on the ground that transfers a telegram transmitted from a central station device to a mobile station device mounted on a train and transfers a telegram transmitted from the mobile station device to the central station device, When a test of the central office device is being conducted, upon receiving a telegram indicating a return registration to a test opposing device, the transfer destination of the telegram transmitted from the central office device is switched to the opposing device. Base station device.

6. A base station device installed on the ground that transfers a telegram transmitted from a central office device to a mobile station device mounted on a train and transfers a telegram transmitted from the mobile station device to the central office device, When a test of the central office device is being conducted, the transfer destination of the telegram transmitted from the central office device is switched to a test opposing device. Communication between the base station device and the opposing device is performed by wired communication. Base station device.

7. A base station device installed on the ground that transfers a telegram transmitted from a central office device to a mobile station device mounted on a train and transfers a telegram transmitted from the mobile station device to the central office device, When a test of the central office device is being conducted, the transfer destination of the telegram transmitted from the central office device is switched to a test opposing device. When a test of the central office device is being conducted, the central office device transmits a telegram with an identifier indicating whether the destination is the mobile station device or the opposing device to the base station device, and the base station device switches the transfer destination of the telegram received from the central office device according to the destination indicated by the identifier of the telegram. Base station device.

8. Even when a test of the central office device is being conducted, the base station device transfers the telegram transmitted from the central office device to the mobile station device. The base station device according to Claim 7.

9. A test opposing device that communicates with a base station device that transfers a telegram transmitted from a central office device to a mobile station device mounted on a train and transfers a telegram transmitted from the mobile station device to the central office device, When a test of the central office device is being conducted, the telegram transmitted from the central office device is received from the base station device. Communication between the base station device and the opposing device is performed by wired communication. Opposing device.

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