JP5199776B2 - Transponder device and transponder system - Google Patents

Description

  The present invention relates to a redundant transponder device and a transponder system that notify a train number of a train that has passed.

  Train operation management systems have been introduced mainly for high-speed railways such as high-density operation lines and bullet trains in metropolitan areas to improve the efficiency of train operation management and passenger services. The train operation management system appropriately manages the operation of the train by comparing the position information and the train number of the currently operating train with a train diagram stored in advance. The train number is a number representing a train name such as “Nozomi 1”. The train operation management system mainly includes a CTC (Centralized Traffic Control) device and a PRC (Programmed Route Control) device.

  The CTC device is connected to the transponder device via a plurality of relay devices, and receives a train number therefrom. The CTC device transmits the train number to the PRC device, and the PRC device performs the route control of the train by calculating the control timing of the traffic light from the train schedule information. Such a train operation management system is disclosed in Patent Documents 1 and 2, for example.

  The transponder device mainly includes a plurality of repeaters installed along a train track, and a processing unit connected to these repeaters via a multidrop dedicated communication line. Each repeater receives a train number from a wireless transmitter provided in the leading vehicle of the passing train. Each repeater transmits an answer frame in response to polling from the processing unit. When a train number is received, the repeater further transmits a train number frame including the train number. Each frame includes a repeater ID that is an identification number of the repeater.

  The processing unit adopts a redundant configuration in preparation for a device failure or the like, and usually has two systems, a main system and a sub system. If the main processing unit fails, the subordinate processing unit performs polling instead. Each processing unit transmits the train number last received from the repeater to the CTC device at a cycle of about 100 ms regardless of whether or not the train number is received. In addition to the train number, the data used for this transmission includes a relay ID and status information for notifying an abnormal condition when an answer frame cannot be received a certain number of times. The status information is 1-bit information. When the status information is 1b, the status information is normal. When the status information is 0b, the status information is abnormal.

  Since the dedicated communication line is installed in an environment with a lot of radio waves such as along a railway line, the transmission path is easily affected by noise, and the processing unit may not be able to receive the train number normally. For this reason, although the status information transmitted by each processing unit indicates both normal, the train number may be different. In such a case, the CTC device and other relay devices, for example, have two Of the train numbers, it is necessary to make a judgment by estimating that the train number that has changed from the previous number is correct.

However, a higher-level device such as a CTC device basically transmits data received from each processing unit, and is not suitable for performing such complicated determination processing. Insufficient performance was a problem.
JP 2002-193104 A JP-A-6-278611

  An object of the present invention is to provide a transponder device and a transponder system in which a host device can recognize a correct train number by a simple determination process.

  In order to solve the above-described problem, a transponder device according to the present invention includes a main processing unit, a sub processing unit, and a plurality of repeaters. The main processing unit and the subordinate processing unit are connected to the plurality of repeaters via a communication line. The main processing unit transmits a polling frame to the plurality of repeaters.

  The plurality of repeaters transmit an answer frame in response to the polling frame, and when receiving a train number from a passing train, transmit the train number frame including the train number following the answer frame. .

  Although the structure described so far can be found in the prior art, the characteristic part of the present invention is in the following part. That is, the answer frame includes train number presence / absence information indicating whether or not a train number frame follows. The master processor and the slave processor receive the train number frame when the answer frame corresponding to the polling frame cannot be received, or when the received train number presence / absence information indicates the presence of the train frame. If it cannot, status information indicating an abnormal state is transmitted to the host device.

  Conventionally, since the main processing unit and the subordinate processing unit monitor only the answer frame at the time of polling, they cannot be detected as an abnormal state when the train number frame cannot be received. However, as described above, by including the train number presence / absence information in the answer frame, even when the train number frame cannot be received, it can be detected as an abnormal state.

  Therefore, since the accuracy of the status information is improved, the host device can determine whether or not to adopt the train number received from the main processing unit based only on the status information. In other words, if the master processing unit shows a normal state, the host device adopts the train number received from the main processing unit, and if not, if the slave processing unit shows a normal state The train number received from the subordinate processing unit is adopted. Therefore, with the above-described configuration, the host device can recognize the correct train number by a simple determination process.

  A transponder system according to the present invention includes the transponder device described above and an on-vehicle wireless transmitter. The on-board wireless transmitter is mounted on the train and transmits the train number to the plurality of repeaters. Therefore, this transponder system has the same effect.

  As described above, according to the present invention, it is possible to provide a transponder device and a transponder system in which a higher-level device can recognize a correct train number by a simple determination process.

  FIG. 1 shows a train number notification system including a transponder device according to the present invention. The transponder device 1 includes a main processing unit 11, a subordinate processing unit 12, and a plurality of repeaters 13 to 16. The transponder system according to the present invention includes a transponder device 1 and an on-vehicle wireless transmitter 22.

  The plurality of repeaters 13 to 16 are installed along the track R and receive the train number from the leading vehicle 2 of the passing train. The leading vehicle 2 of the train is provided with an on-board wireless transmitter 22 and wirelessly transmits the train number set by the train number setting device 21.

  The main processing unit 11 and the subordinate processing unit 12 are connected to a plurality of repeaters 13 to 16 via a communication line 17. The communication line 17 is a dedicated line for metal transmission, and has a multi-drop method in which each device shares a transmission path. That is, the frame transmitted by the main processing unit 11, the subordinate processing unit 12, and any of the plurality of repeaters 13 to 16 includes the transmission source, and the main processing unit 11, the subordinate processing unit 12, and the plurality of relays. All of the devices 13-16 will receive.

  The main processing unit 11 transmits the polling frame P to the plurality of repeaters 13 to 16. At this time, the secondary processing unit 12 also receives the polling frame P. When a failure occurs in the main processing unit 11 and the polling frame P cannot be transmitted, the main processing unit 11 detects this by self-diagnosis and operates the switching relay to thereby detect the subordinate processing. The unit 12 transmits the polling frame P on behalf of the main processing unit 11.

  When the plurality of repeaters 13 to 16 transmit the answer frame ANS in response to the polling frame P and receive the train number from the passing train, the train number frame NUM including the train number follows the answer frame ANS. Send. Here, as shown in FIG. 2, the answer frame ANS includes a repeater ID indicating the repeaters 13 to 16 as transmission sources, status information of the repeaters 13 to 16, and the like. As shown in FIG. 3, the train number frame NUM includes a repeater ID in addition to the train number.

  The slave processor 12 also sends an answer frame ANS in response to the polling frame P for transmission self-diagnosis. The subordinate processing unit 12 and the plurality of repeaters 13 to 16 are set in a certain transmission order so that the transmitted answer frame ANS does not collide and disappear on the transmission path, and the answer frame ANS transmitted from other devices is transmitted. Is detected to control the transmission timing. After receiving the answer frame ANS, the main processing unit 11 performs the next polling when no other frame is received for a certain period of time.

  Although the structure described so far can be found in the prior art, the characteristic part of the present invention is in the following part. That is, the answer frames ANS of the repeaters 13 to 16 include train number presence / absence information indicating whether or not the train number frame NUM follows. The main processing unit 11 and the subordinate processing unit 12 cannot receive the train number frame NUM when the answer frame ANS corresponding to the polling frame P cannot be received, or when the received train number presence / absence information indicates the presence. In this case, status information indicating an abnormal state is transmitted to the host apparatus 3.

  Conventionally, the main processing unit 11 and the subordinate processing unit 12 monitor only the answer frame ANS at the time of polling, and thus cannot detect an abnormal state when the train number frame NUM cannot be received. However, as described above, by including the train number presence / absence information in the answer frame ANS, even when the train number frame NUM cannot be received, it can be detected as an abnormal state.

  Further, the upper apparatus 3 transmits a request frame REQ to the main processing unit 11 and the subordinate processing unit 12 at a constant cycle, as in the past, and the main processing unit 11 and the subordinate processing unit 12 In response to the REQ, a report frame REP is transmitted for each of the repeaters 13 to 16. As shown in FIG. 4, the report frame REP includes a repeater ID, status information, a train number, and the like. As described above, the host device 3 is a relay device or a CTC device connected via a communication network, and a configuration according to the system design is adopted.

  Further, in the present embodiment, the main processing unit 11 makes a retransmission request so that the frame can be reliably received from the repeaters 13 to 16. Therefore, the polling frame P includes retransmission request information for requesting retransmission of the answer frame ANS and the train number frame NUM by individually specifying the plurality of repeaters 13 to 16 as shown in FIG. The retransmission request information includes information indicating the presence / absence of a request and a repeater ID. During normal polling, the retransmission request information indicates a request “none”.

  Therefore, when the main processing unit 11 cannot receive the answer frame ANS or the train number frame NUM, the main processing unit 11 transmits the polling frame P for requesting retransmission by the retransmission request information to the plurality of repeaters 13 to 16 and designates the specified relay. When the answer frame ANS or the train number frame NUM cannot be received from the devices 13 to 16, status information indicating an abnormal state is transmitted to the host device 3. Therefore, when the main processing unit 11 cannot receive a frame due to a transmission path error due to the influence of noise or the like, the frame can be normally received by making a retransmission request. On the other hand, if the main processing unit 11 cannot receive a frame due to a failure of the main processing unit 11 or the repeaters 13 to 16, the frame cannot be normally received even if a retransmission request is made. This can be detected as an abnormal state. That is, the main processing unit 11 can clearly distinguish an apparatus failure from a transmission path error and determine an abnormal state.

  Next, an operation flow of the main processing unit 11 at the time of polling is shown and described in FIG. The main processing unit 11 transmits a polling frame P (retransmission request “none”) (St1), and confirms reception of the answer frame ANS and the train number frame for each repeater (St2 to St4). When the answer frame ANS and the train number frame NUM (only when the train number presence / absence information is “present”) are normally received, the status information is set to “normal” (St11).

  On the other hand, when the answer frame ANS or the train number frame NUM has not been normally received, the main processing unit 11 designates the repeaters 13 to 16 that have not been received, and the polling frame P (retransmission request “present”). Is transmitted (St5). Then, reception of the answer frame ANS and the train number frame NUM is confirmed for each of the repeaters 13 to 16 (St6 to St8). If the frame is not successfully received even after the polling frame P (retransmission request “present”) is transmitted three times, the status information is set to “abnormal” (St9, St10). On the other hand, when the frame can be normally received by the retransmission request, the status information is set to “normal” (St11). The number of retransmission requests until “abnormal” is determined is not limited to three as in the present embodiment, and may be determined as appropriate according to the error rate of the transmission path.

  As for the operation of the subordinate processing unit 12, only the frame reception confirmation (St2 to 4) shown in FIG. 6 is performed, and when it is normally received, the status information is set to “normal”. The status information is “abnormal”. At this time, the number of unreceived times until “abnormal” is determined may be appropriately determined according to the design.

  FIG. 7 illustrates a specific example of the polling operation. The main processing unit 11 transmits a polling frame P (retransmission request “none”). The repeaters 13 to 16 and the secondary processing unit 12 transmit the answer frames ANS1 to ANS5 to the main processing unit 11 after the individual delay times T1 to T5 have elapsed after receiving the polling frame P. At this time, the repeater a13 and the repeater b14 have received the train number, indicate “present” in the train number presence / absence information of the answer frames ANS1 and 2, and transmit the answer frames ANS1 and 2 for a predetermined time. Later, train number frames NUM1, 2 are transmitted. Then, it is assumed that the train number frame NUM2 is lost due to a transmission path error or data is destroyed and is not normally received by the main processing unit 11.

  The main processing unit 11 detects that the train number frame NUM2 has not been received within a predetermined time even though the train number presence / absence information of the answer frame ANS2 indicates “present”. The main processing unit 11 receives the last answer frame ANS5 and transmits a polling frame P (retransmission request “present”) accompanied by a retransmission request to the repeater b14 after a predetermined time Tc has elapsed. Thereby, the repeater b14 transmits the answer frame ANS2 and the train number frame NUM2 after T2 hours from the reception. When receiving these, the main processing unit 11 sets the status information of the relay b14 to “normal”. On the other hand, if the polling frame P accompanying the retransmission request is not received even after being transmitted three times, the status information of the relay b14 is set to “abnormal”.

  As described so far, according to the transponder device according to the present invention, the accuracy of the status information is improved, so that the host device 3 receives the train received from the main processor 11 based only on the status information. It can be determined whether or not the number is adopted. That is, as in the determination processing flow shown in FIG. 8, the host apparatus 3 adopts the train number received from the main processing unit 11 if the main processing unit 11 indicates a normal state (St11 to St11). St13) Otherwise, if the slave processor 12 indicates a normal state, the train number received from the slave processor 12 is adopted (St11, St12, St14, St15). Therefore, with the above-described configuration, the host device 3 can recognize the correct train number by a simple determination process.

  In addition, since the transponder device according to the present invention is only slightly changed from the conventional configuration of the polling frame P and the answer frame ANS, the functions of the processing units 11 and 12 and the repeaters 13 to 16 have been changed. There is also the merit that it can be realized at low cost by short-term development without drastically changing. In addition, since the report apparatus has the same configuration as that of the conventional report apparatus 3 as well, no major function change is required except for the determination process shown in FIG. Therefore, in view of the importance of the problem of the present invention, it can be said that the transponder device according to the present invention has a great effect by a slight improvement of the prior art. Therefore, the transponder system according to the present invention has the same effect.

  In this embodiment, from the viewpoint of system responsiveness, the transmission of the request frame REQ from the host device 3 and the polling execution of the main processing unit 11 may be synchronized. This will be described with reference to a report frame REP transmission processing flow in FIG.

  The host device 3 transmits a request frame REQ simultaneously to the main processor 11 and the sub processor 12 in the cycle L. The main processing unit 11 receives the request frame REQ and transmits a polling frame P (retransmission request “none”) after a lapse of Tx time. Further, before receiving the next request frame REQ, the main processing unit 11 makes a re-transmission request as necessary, determines whether the status information is “normal” or “abnormal”, and sets the report frame REP1 to the upper level. Transmit to device 3. Similarly, the subordinate processing unit 12 also transmits the report frame REP2.

  By designing the timing in this way, the main processing unit 11 and the subordinate processing unit 12 can transmit a report frame REP for each normal / abnormal discrimination process by a series of polling processes. Conventionally, since the transmission of the request frame REQ and the polling execution of the main processing unit 11 are asynchronous, the main processing unit 11 transmits the report frame REP before the normal / abnormal determination process is completed. There was also. At this time, since the last received train number is included in the report frame REP as “normal” as described above, the upper apparatus 3 is useless if the train number is the same as the previously received train number. You will receive information. That is, the host device 3 operates in a so-called event-driven manner that performs control only when information changes, and therefore does not operate even if it receives a report frame REP including the same information. Therefore, by adopting the synchronous operation as shown in FIG. 9, the host apparatus 3 receives the report frame REP only when there is a possibility that the information has changed, thereby improving the responsiveness of the train number notification system. be able to.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

1 shows a train number notification system including a transponder device according to the present invention. The structure of an answer frame ANS is shown. The structure of the train number frame NUM is shown. The structure of the report frame REP is shown. The structure of the polling frame P is shown. The operation flow of the main processing unit at the time of polling is shown. A specific example of the polling operation will be shown. The determination processing flow of a high-order apparatus is shown. The transmission processing flow of the report frame REP is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transponder apparatus 11 Main processing part 12 Subordinate processing part 13-16 Repeater 17 Communication line 3 Host apparatus

Claims (3)

It is a transponder device that notifies the train device of the train number,
It has a repeater that transmits and receives a polling frame and an answer frame in response to the processing unit ,
When the train number is received from the train through which the repeater passes, following the answer frame, the processing unit receives the train number frame including the train number,
The answer frame includes train number presence / absence information indicating whether a train number frame follows,
If you can not receive the answer frame corresponding to the polling frame, or, if unable to receive the train number frame when the train number whether information received indicates that there is, indicates an abnormal state in the apparatus of the higher Send status information,
Transponder device. The transponder device according to claim 1, comprising a plurality of the repeaters ,
A plurality of the repeaters receive the polling frame, transmit the answer frame, and the train number frame;
The polling frame includes retransmission request information for requesting retransmission of the answer frame and the train number frame by individually specifying a plurality of the repeaters ,
Transmitting the polling frame requesting retransmission by the retransmission request information to a plurality of the repeaters, if the specified the relay can not receive the answer frame or the train number frame, abnormality in the apparatus of the higher Send status information indicating the state,
Transponder device. The transponder device according to claim 2, wherein the processing unit includes a main processing unit and a subordinate processing unit,
The main processor and the slave processor are connected to the plurality of repeaters via a communication line,
The main processing unit transmits the polling frame to a plurality of the repeaters,
When the status information transmitted from the primary processing unit indicates an abnormal state, if the status information transmitted from the secondary processing unit indicates a normal state, the higher-level device has received from the secondary processing unit. Adopt train number,
Transponder device.

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