JP5685175B2 - Wireless train signal system and communication device - Google Patents

Description

The present invention relates to a mobile communication system capable of communicating between mobile bodies that can communicate with a base station, and a communication device mounted on the mobile body .

  In the railway signal system, communication is performed between the ground radio device and the on-vehicle radio device. The area where one terrestrial radio apparatus can communicate with the vehicle is limited. Therefore, when a vehicle that communicates with the terrestrial radio device travels on a predetermined track, the communication is continued while sequentially switching the terrestrial radio devices installed on the fixed track. If there is a device failure in the terrestrial wireless device or on-vehicle wireless device, or if there is a communication failure due to interference in communication between the terrestrial wireless device and the on-vehicle wireless device, take some countermeasures to recover from the communication abnormality There is a need.

  As a method for detecting a communication abnormality between a ground radio device and an on-vehicle radio device, for example, there is a method disclosed in Patent Document 1. In this method, it is determined whether the monitoring data generated in one radio system out of the two radio systems provided in the terrestrial radio apparatus matches the monitor data input from the other radio system, and the terrestrial radio apparatus fails. Estimate the location.

JP 2011-61268 A

  When communication between the terrestrial wireless device and the on-board wireless device is obstructed, the monitoring data for detecting the communication abnormality has not reached, so it cannot be compared with the monitoring data serving as a reference for comparison. Moreover, it becomes difficult to detect a failure because monitoring data cannot be acquired.

  In order to solve the above-described problems, the present invention provides a reception packet signal generated when communication is normally performed or log information of a communication station reception order generated when the communication is normally performed, so that the communication is inhibited. It is acquired and monitored at a ground device (referred to as “access point master (APM)”) that manages a plurality of ground radio devices (referred to as “access point (AP)”).

  A radio train signal system according to the present invention is a radio train including a communication device mounted on a train, a plurality of ground radio devices that perform radio communication with the communication device, and a ground device that manages the plurality of ground radio devices. In the signaling system, the terrestrial device or the terrestrial radio device has the standard value information of the number of received packets for each terrestrial radio device recorded in the standard value table, or the standard value information of the communication order with the terrestrial radio device, A comparison unit that compares information on the number of received packets for each terrestrial radio device obtained from a communication packet transmitted from the communication device, or information on a communication order with the terrestrial radio device, the comparison unit, The standard value information is compared with information from the communication device, and if the result of the comparison results in actual traveling information different from the determination criterion, the monitoring unit is notified of abnormality detection. To.

  The wireless train signal system of the present invention further includes an access point number order of communication partner terrestrial wireless devices created using communication success information with communication devices mounted on the train collected from the terrestrial wireless devices. And a standard value of the communication partner access point order recorded in the standard value table, a terrestrial radio apparatus in which a communication failure has occurred is detected.

  The radio train signal system of the present invention further includes statistical information on the number of received packets created using communication success information with the ground radio apparatus in the communication device mounted on the train, and the number of received packets created in advance. The terrestrial radio apparatus in which a communication failure has occurred is detected by comparison with the standard value of.

  Further, the radio train signal system of the present invention includes statistical information on the number of received packets created using communication success information with the ground radio apparatus in a communication device mounted on the train, and the number of received packets created in advance. The terrestrial radio apparatus in which a communication failure has occurred is detected by comparison with the standard value of.

  In the radio train signal system of the present invention, the monitoring terminal further includes statistical information of the number of received packets created using communication success information with the communication device mounted on the train collected from the ground radio device. Comparing the standard value of the number of received packets created in advance using information that can be acquired from the communication device mounted on the train to detect a terrestrial wireless device in which a communication failure has occurred Features.

  Further, in the radio train signal system of the present invention, the monitoring terminal is provided with statistical information on the number of received packets created using communication success information with the communication device mounted on the train collected from the ground radio device. Comparing the standard value of the number of received packets created in advance using information that can be acquired from the communication device mounted on the train to detect a terrestrial wireless device in which a communication failure has occurred Features.

  According to the present invention, even when a communication failure occurs, it is possible to detect a communication abnormality and to detect a device failure.

FIG. 1 is a diagram showing a configuration of a radio train signal system of the present invention. FIG. 2 is a diagram illustrating the ground device according to the first embodiment of the present invention. FIG. 3 is a diagram showing a statistical information processing flow according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating a communication abnormality determination method according to the first embodiment of this invention. FIG. 5 is a diagram illustrating a determination criterion table according to the first embodiment of this invention. FIG. 6 is a diagram illustrating a ground device according to a second embodiment of the present invention. FIG. 7 is a diagram illustrating communication order determination processing according to the second embodiment of this invention. FIG. 8 is a diagram illustrating a communication order determination process flow according to the second embodiment of the present invention. FIG. 9 is a diagram showing the on-vehicle communication device according to the third embodiment of the present invention. FIG. 10 is a diagram illustrating a communication device on a vehicle according to a fourth embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

[Configuration of wireless train signal system]
First, the configuration of the radio train signal system will be described with reference to FIG. A train equipped with a communicator (station, hereinafter referred to as “STA”), a ground device that performs wireless communication with the train (access point, hereinafter referred to as “AP”), and a plurality of stations arranged on a fixed orbit It is configured by an AP master (hereinafter referred to as “APM”) that is connected to the AP in a wired manner and manages each AP.

  When detecting an abnormality in communication performed between AP2 and STA1, a plurality of communication nodes that determine abnormality may be considered as AP2, APM3, and STA1. Here, the case where the APM 3 determines abnormality is described below.

[Configuration of ground device of communication system]
APM 3 provided with a communication abnormality detection device will be described with reference to FIG. (Refer to FIG. 3 and FIG. 4 as appropriate.) The APM 3 holds a received packet number standard value table 301 as a reference for detecting a communication abnormality, but is set before traveling. The received packet number standard value table 301 indicates the number of received packets for each AP 2 when operating at a specific speed. The received packet number standard value table 301 can be calculated and stored in advance. For example, the time required to pass through the communicable area is obtained from the distance of the communicable area for each AP 2 and the design value of the traveling speed.

  The number of received packets can be calculated from the transit time of the communicable area and the transmission cycle of communication packets. Alternatively, the number of received packets of each AP 2 obtained by averaging a plurality of actual traveling sample data can be used as the received packet number standard value table 301.

  In the APM 3, the information extraction unit 303 receives the communication packet reception response information via the communication unit 302. The information extraction unit 303 transmits the traveling speed information 1012 and the vehicle position information 1013 which are actual operation data to the actual operation data database 304 (hereinafter referred to as “DB”) from the received communication packet.

  Also, the AP number that received the communication packet, the communication frequency channel (hereinafter referred to as “ch”) information used for transmission between the train and the AP, and the time stamp that is the time when the communication packet was received by the receiving AP 2 The information is transmitted to the statistical processing unit 305 that calculates the statistical value of the number of received packets.

  The statistical processing unit 305 transmits statistical information recording the number of packets received for each calculated AP 2 to the received packet number DB 306 for each AP. Since the communication time in the area where each AP 2 can communicate is known from the speed information that is the operation information stored in the actual operation data DB 304, it is possible to calculate how many received packets can be received.

  For this reason, the criterion generation unit 307 corrects the received packet number standard value table 301. The comparison unit 308 compares the corrected received packet number standard value table 301 with the data in the received packet number DB 306 for each AP in which the actually received packet number is described (the determination criterion 501 and the determination target 502 in FIG. 5). See).

  Then, the comparison result is transmitted to the monitoring unit 309, and the monitoring unit 309 has an AP2 in which the actual number of received packets is lower than the number of received packets obtained by correcting the data in the received packet number standard value table 301 that is the determination criterion 501. Determine whether or not. If not, return to the original process. When there is an AP2 that is lower than the determination criterion 501, the monitoring unit 309 displays one or both of the occurrence of the communication abnormality and / or the occurrence location AP on the display unit 310 such as a lamp or a monitor.

  Then, in order to identify the cause of the occurrence of the abnormality, the monitoring unit 309 stores information used for determination as log information in the determination log DB 311.

  FIG. 3 is a diagram showing a statistical information processing flow according to the first embodiment of the present invention. In step S301 of FIG. 3, a received packet number standard value table 301 indicating the number of received packets when operating at a specific speed is created, and in step S302, statistical information and operation information are extracted from the received packets. In step S303, a correction value for the number of received packets in the communication area of each AP 2 is calculated from the operation information stored in the actual operation data DB 304, and in step S304, the determination criterion generation unit 307 corrects the received packet number standard value table 301. To do.

  In step S305, the comparison unit 308 compares the number of received packets for each AP with the determination criterion 501. In step S306, it is determined whether there is an AP having the number of received packets that is lower than the determination criterion 501. In step S306, if there is no AP2 that is the number of received packets below the criterion 501 (No), the process proceeds to step S309 and returns to the original process.

  In step S306, if there is an AP whose number of received packets is less than the criterion 501 (Yes), it is displayed in step S307 that an abnormality has been detected, and in step S308, the determination is made. After the used determination information is stored in the determination log DB 311, the process returns to the original process in step S309.

  FIG. 4 is a diagram illustrating a communication abnormality determination method according to the first embodiment of this invention. In FIG. 4, an access point AP2 (eg, AP1, AP2) that is a terrestrial wireless device performs wireless communication with STA1, and when wireless communication between AP2 and STA1 succeeds, STA1 transmits a response signal (Ack) and accesses Point AP2 (for example, AP1, AP2) transmits reception response information to APM3.

  The APM 3 totals reception response information, and the monitoring terminal 4 connected to the APM 3 performs statistical processing on the total reception response information. When the number of reception response signals received is less than the minimum number of received packets during normal communication, the abnormality detection of the AP 2 in which an abnormality has occurred is performed.

  FIG. 5 is a diagram illustrating a determination criterion table according to the first embodiment of this invention. In FIG. 5, 501 indicates the number of received packets during normal communication as a determination criterion, 502 indicates the actual number of received packets as a determination target, and 503 indicates whether or not there is a possibility of communication abnormality as a determination result (Yes: 1). Yes.

  When the number of received packets at normal communication of AP numbers 1, 2, and n is 50, 25, 50, while the actual data of received packet numbers is 60, 12, 63, the access point of AP number 2 It is determined that there is a possibility of communication abnormality (Yes: 1).

[Communication abnormality determination method 2: Communication order]
In addition to the above-described method based on the number of received packets, the communication abnormality determination method includes a method based on the communication order of AP2. FIG. 6 is a diagram showing a ground communication apparatus according to the second embodiment of the present invention.

  FIG. 6 shows the configuration of the APM when the communication abnormality is determined using the communication order of AP2. FIG. 7 is a diagram illustrating communication order determination processing according to the second embodiment of this invention.

  Upon receiving the communication packet from STA1, AP2 transmits the communication packet to communication unit 602 of APM3. The communication packet received at the APM 3 is sent to the information extraction unit 603 via the communication unit 602. The information extraction unit 603 extracts the AP number and time stamp information that received the communication packet.

  Using these pieces of information, it is possible to create a table in which the number of received packets for each AP number is recorded at regular intervals. The communication AP order calculation processing unit 605 extracts the communication partner AP number 702 assuming that AP2 having the maximum number of received packets per fixed time is the communication partner.

  In FIG. 7, the number of received packets 701 for each time is recorded for each AP number. Based on the number of received packets 701 for each AP number for each time, the communication partner AP number 702 for each time is specified. For example, when the AP number having the maximum number of received packets for each time is examined, it changes from 13 → 13 → 13 → 5, and the communication partner AP number 702 changes from 1 → 2 → 2 → 2. On the other hand, the predetermined communication partner AP standard 703 changes from 1 → 2 → 2 → 2.

  Details will be described by taking as an example the case of specific times 07: 04: 0 to 07:05:00 in FIG. Although the communication partner AP standard 703 that is the original communication partner should be “AP3”, the communication partner AP number 702 is actually “AP2”. In this case, since an abnormality is observed in the communication order, the determination result 704 changes from 0 to 1, and a communication abnormality at “AP3” can be detected. At this time, the communication log at the time when the abnormality determination is performed is stored in the determination log DB 611. The communication partner AP standard 703 is recorded in the communication AP order standard value table 601, for example.

  FIG. 8 is a diagram illustrating a communication order determination processing flow according to the second embodiment of the present invention. In step S801 of FIG. 8, a communication AP order standard value table 601 indicating the order of the communication partner AP2 when operating on the route is created, statistical information is extracted from the received packet in step S802, and in step S803, In communication AP order calculation processing unit 605, communication partner AP number 702 is calculated, and in step S804, the calculated AP number is stored in communication AP order DB 606.

  In step S805, the comparison unit 608 compares the information of the communication partner AP number 702 and the information of the communication partner AP standard 703 described in the communication AP order standard value table 601, and in step S806, the communication partner AP determines the standard value. It is determined whether or not.

  If the communication partner AP is not different from the standard value in step S806 (No), the process returns to the original process in step S809. In step S806, if the communication partner AP is different from the standard value (Yes), it is displayed in step S807 that an abnormality has been detected, and in step S808, the determination information used for the determination is determined in the determination log. In step S809, the process returns to the original process.

  FIG. 9 shows an on-vehicle communication device according to a third embodiment of the present invention, and STA1, which is a train equipped with a communication device, includes a communication abnormality detection device.

[Configuration of communication system]
STA1 provided with a communication abnormality detection device will be described with reference to FIG. The STA1 holds a standard value table 901 serving as a reference for detecting a communication abnormality, and is set before traveling. The standard value table 901 shows the number of received packets for each AP 2 when operating at a specific speed. The standard value table 901 can be calculated and stored in advance. For example, the time required to pass through the communicable area is obtained from the distance of the communicable area for each AP 2 and the design value of the traveling speed.

  The number of received packets can be calculated from the transit time of the communicable area and the transmission cycle of communication packets. Alternatively, the number of received packets of each AP 2 obtained by averaging a plurality of actual traveling sample data can be used as the standard value table 901.

  The STA 1 transmits travel speed information 912 and vehicle position information 913 that are actual operation data to an actual operation data database 904 (hereinafter referred to as “DB”).

  In the STA1, the information extraction unit 903 receives the communication packet reception response information via the communication unit 902. In the information extraction unit 903, the AP number that received the communication packet, the communication frequency channel (hereinafter referred to as “ch”) information used for transmission between the train and the AP, and the time when the reception AP 2 received the communication packet. Information on a certain time stamp is transmitted to the statistical processing unit 905 that calculates the statistical value of the number of received packets.

  The statistical processing unit 905 transmits statistical information recording the number of packets received for each calculated AP 2 to the received packet number DB 906 for each AP. Since the communication time in the area where each AP 2 can communicate is known from the speed information that is the operation information stored in the actual operation data DB 904, it is possible to calculate how many received packets can be received.

  Therefore, the standard value table 901 is corrected in the determination criterion generation unit 907. The comparison unit 908 compares the corrected standard value table 901 with the data in the received packet number DB 906 for each AP in which the number of packets actually received is described.

  Then, the comparison result is transmitted to the monitoring unit 909, and the monitoring unit 909 determines whether or not there is an AP2 whose actual number of received packets is less than the number of received packets obtained by correcting the data of the standard value table 901 that is the determination criterion 501. Make a decision. If not, return to the original process.

  Then, in order to identify the cause of the abnormality, the monitoring unit 909 stores information used for determination as log information in the determination log DB 911.

[Diagram of train abnormality judgment (difference in judgment place of communication abnormality judgment methods 1 and 2), response to operation information (optional)]

  FIG. 10 illustrates a process when there is a change in the schedule and operation information. FIG. 9 shows a case where the communication abnormality detection device loaded on the APM 3 as described above is loaded on the train side.

  The processing described in FIG. 10 will be described by taking an example in which the communication abnormality detection device is loaded on the train side as shown in FIG. 9, but the communication abnormality detection device is loaded on the APM 3 side as shown in FIG. May be.

  In FIG. 10, STA 1 holds a standard value table 1001 serving as a reference for detecting a communication abnormality, and is set before traveling. The standard value table 1001 indicates the number of received packets for each AP 2 when operating at a specific speed. The standard value table 1001 can be calculated and stored in advance. For example, the time required to pass through the communicable area is obtained from the distance of the communicable area for each AP 2 and the design value of the traveling speed.

  The number of received packets can be calculated from the transit time of the communicable area and the transmission cycle of communication packets. Alternatively, the number of received packets of each AP 2 obtained by averaging a plurality of actual traveling sample data can be used as the standard value table 1001.

  The STA1 transmits travel speed information 912 and vehicle position information 913, which are actual operation data, to the actual operation data DB 1004.

  In the STA1, the information extraction unit 1003 receives the communication packet reception response information via the communication unit 1002. In the information extraction unit 1003, the AP number that received the communication packet, the communication frequency channel (hereinafter referred to as “ch”) information used for transmission between the train and the AP, and the time at which the communication packet was received by the receiving AP 2 A certain time stamp information is transmitted to the data processing unit 1005.

  In the data processing unit 1005, statistical information recording the number of packets received for each AP 2 is transmitted to the received packet number DB 1006 for each AP. Since the communication time in the area where each AP 2 can communicate is known from the speed information that is the operation information stored in the actual operation data DB 1004, it is possible to calculate how many received packets can be received.

  Therefore, the criterion generation unit 1007 corrects the standard value table 1001. The comparison unit 1008 compares the corrected standard value table 1001 with the data of the received packet number DB for each AP in which the number of packets actually received is described.

  Then, the comparison result is transmitted to the monitoring unit 1009, and the monitoring unit 1009 determines whether or not there is an AP2 whose actual number of received packets is lower than the number of received packets obtained by correcting the data in the standard value table 1001 that is the determination criterion 501. Make a decision. If not, return to the original process. When there is an AP2 that is lower than the determination criterion 501, the monitoring unit 1009 displays one or both of the occurrence of the communication abnormality and / or the occurrence location AP on the display unit 1010 such as a lamp or a monitor.

  In order to identify the cause of the occurrence of the abnormality, the monitoring unit 1009 stores information used for determination as log information in the determination log DB 1011.

  Consider a case where the diagram information 1015 and the run curve information 1014 extracted from the information extraction unit 1003 are input to the actual operation data DB 1004. For example, if there is a delay in the operation information due to weather conditions, etc., and there is a disruption of the schedule, the communication time in the area of the specific AP2 is different from the originally calculated time, and the standard The value may not correspond to the actual operation.

  Therefore, it is necessary to reflect actual run curve information 1014 and diagram information 1015 on the data of the standard value table 1001. Therefore, when the operation information 1014 and the diagram information 1015 are input to the actual operation data DB 1004, the determination reference generation unit 1007 corrects the data in the standard value table 1001. For example, it is possible to calculate the time for communicating with each AP 2 using the position information 1013 and the traveling speed information 1012 that can be acquired from the vehicle. Alternatively, since the speed information at each vehicle position is determined from the diamond information and the run curve information that defines the travel speed pattern of the travel section, it is possible to calculate the time for communicating with each AP 2.

  Therefore, in order to make the data of the standard value table 1001 according to the operation status, the determination standard generation unit 1007 corrects a new standard value. Further, the corrected standard value may be updated.

1 STA
2 AP
3 APM
4 monitoring terminal 301 received packet number standard value table 302 communication unit 303 information extraction unit 304 actual operation data DB
305 Statistical processing unit 306 Number of received packets per AP DB
307 Judgment Criteria Generation Unit 308 Comparison Unit 309 Monitoring Unit 310 Display Unit 311 Judgment Log DB
501 Determination Criteria 502 Determination Object 503 Determination Result 601 Communication AP Order Standard Value Table 602 Communication Unit 603 Information Extraction Unit 605 Communication AP Order Calculation Processing Unit 606 Communication AP Order DB
608 Comparison unit 609 Monitoring unit 610 Display unit 611 Determination log DB
701 Number of received packets per time 702 Communication partner AP number 703 Communication partner AP standard 704 Determination result 901 Standard value table 902 Communication unit 903 Information extraction unit 904 Actual operation data DB
905 Statistical processing unit 906 Number of received packets per AP DB
907 Judgment reference generation unit 908 Comparison unit 909 Monitoring unit 911 Judgment log DB
912 Travel speed information 913 Vehicle position information 1001 Standard value table 1002 Communication unit 1003 Information extraction unit 1004 Actual operation data DB
1005 Data processing unit 1006 Number of received packets per AP DB
1007 Determination Criteria Generation Unit 1008 Comparison Unit 1009 Monitoring Unit 1010 Display Unit 1011 Determination Log DB
1012 Travel speed information 1013 Vehicle position information 1014 Run curve information 1015 Diamond information

Claims (7)

In a radio train signal system comprising a communication device mounted on a train, a plurality of ground wireless devices that perform wireless communication with the communication device, and a ground device that manages the plurality of ground wireless devices,
The terrestrial device or the terrestrial radio device receives from the communication device standard value information of the number of received packets for each terrestrial radio device recorded in a standard value table, or standard value information of a communication order with the terrestrial radio device, and A comparison unit that compares information on the number of received packets for each terrestrial radio device obtained from transmitted communication packets, or information on a communication order with the terrestrial radio device,
The comparison unit compares the standard value information with information from the communication device, and if the result of the comparison is actual running information different from the determination criterion, notifies the monitoring unit of the detection of abnormality ,
By comparing the statistical information of the number of received packets created using the communication success information with the terrestrial wireless device in the communication device mounted on the train and the standard value of the number of received packets created in advance, communication failure A radio train signal system characterized by detecting generated terrestrial radio equipment . In the radio train signal system according to claim 1,
Access point number order of communication partner terrestrial wireless device created using communication success information with communication device mounted on train collected from terrestrial wireless device, and communication partner recorded in standard value table A radio train signal system that detects a ground radio device in which a communication failure has occurred by comparison with a standard value of an access point order. In the radio train signal system according to claim 1 or 2 ,
For successful communication information is compared with statistics for the number of received packets that are created using a standard value of the number of received packets that are created in advance between the previous SL terrestrial radio device mounted on the communication device on the train collected from A radio train signal system that detects a ground radio device in which a communication failure has occurred by performing correction using information that can be acquired from a communication device mounted on the train. In the radio train signal system according to any one of claims 1 to 3,
The standard value of the number of received packets created in advance is updated based on the updated diamond information or run curve information when the diamond information or run curve information is updated. Signal system. A communication device mounted on a train and capable of wireless communication with a plurality of ground wireless devices,
A standard value table in which standard values of the number of received packets of each of the plurality of terrestrial radio devices are recorded;
The standard value recorded in the standard value table is compared with the actual number of received packets for each terrestrial radio device transmitted from each of the plurality of terrestrial radio devices, and the plurality of terrestrial radios are based on the comparison result A communication device that detects an abnormality of a device. The communication device according to claim 5, wherein
A communication device that corrects a standard value of the standard value table based on actual operation data of the train. The communication device according to claim 5 or 6,
The standard value of the standard value table is updated based on the updated diamond information or run curve information when the diamond information or run curve information is updated.

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