JP2013062664A - Radio communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately notify the upper-level device of the occurrence of a failure and the restoration.SOLUTION: A radio communication device includes: a TRX1 system 203 and a TRX2 system 204 for performing transmission and reception to/from a ground facility 205 by radio; and a main CPU 201 for setting the TRX1 system 203 and the TRX2 system 204 to an active system or a standby system, respectively. On detection of a failure, the CPU 201 transmits the notification of that effect from the TRX1 system 203 or the TRX2 system 204 to the ground facility 205. Based on an occurrence response from the ground facility 205 received by one of the TRX1 system 203 and the TRX2 system 204, the CPU 201 terminates failure occurrence notification processing.

Description

  The present invention relates to a wireless communication device that performs wireless communication with a host device using a duplex transmitter / receiver.

  The train radio system enables communication between ground equipment installed on the ground and an on-board station mounted on a moving train. The onboard station has dual-system transceivers, which are switched between the active system and the standby system to perform wireless communication with the ground equipment, and notify the ground equipment of the occurrence or recovery of a fault at the onboard station (for example, , See Patent Document 1).

  FIG. 7 shows a sequence of failure occurrence and recovery of a conventional wireless communication apparatus. FIG. 7 shows a case where the TRX1 system is the active side and the TRX2 system is the standby side. When a failure 705 occurs in the on-board station, the main CPU 701 notifies the occurrence notification 710 to the TRX1 system 702 and the TRX2 system 703. The TRX1 system 702 on the active side transmits an occurrence notification 711 to the ground facility 704 and waits for a response. On the other hand, the spare TRX2 system 703 does not transmit to the ground facility 704 and waits for a response from the ground facility 704. When the generation response 712 is returned from the ground facility 704, the TRX1 system 702 and the TRX2 system 703 receive and return to the idle state. Note that recovery from the failure 705 is the same sequence as the occurrence of the failure 705.

  FIG. 8 shows a retransmission processing sequence in the case where the generation response from the ground facility has not reached the working side and the backup side in the conventional wireless communication apparatus. When a failure 805 occurs in the on-board station, the main CPU 801 notifies the occurrence notification 810 to the TRX 1 system 802 and the TRX 2 system 803. The TRX1 system 802 on the active side transmits an occurrence notification 811 to the ground facility 804 and enters a response waiting state. On the other hand, the spare TRX2 system 803 does not transmit to the ground facility 804 and waits for a response from the ground facility 804.

  The ground facility 804 returns a generation response 812. If the generation response 812 has not reached the TRX1 system 802 and the TRX2 system 803, the TRX1 system 802 on the active side retransmits the generation notification 813. When the generation response 814 of the ground facility 804 reaches the TRX1 system 802 and the TRX2 system 803, the TRX1 system 802 stops the retransmission process, and both the TRX1 system 802 and the TRX2 system 803 return to the idle state. In the case of failure recovery, the sequence is the same as the occurrence of the failure 805. That is, the main CPU 801 notifies the TRX1 system 802 and the TRX2 system 803 of the failure state change, and the TRX1 system 802 or the TRX2 system 803 controls the radio line.

  FIG. 9 shows a case where the generation response from the ground facility has not reached the spare side only in the conventional wireless communication apparatus. When a failure 905 occurs in the on-board station, the main CPU 901 notifies the occurrence notification 910 to the TRX 1 system 902 and the TRX 2 system 903. The TRX1 system 902 on the active side transmits an occurrence notification 911 to the ground facility 904 and enters a response waiting state. On the other hand, the TRX2 system 903 on the standby side does not transmit to the ground facility 904, and enters a state of waiting for a response from the ground facility 904.

  When the generation response 912 does not reach the standby TRX2 system 903 and the generation response 913 reaches the active TRX1 system 902 among the returns of the ground equipment 904, the TRX1 system 902 returns to the idle state, but the TRX2 system 903 It remains in the response waiting state. Further, when the failure 905 is recovered in the above state and the recovery response 921 which is the return of the ground facility 904 reaches the TRX1 system 902 and the TRX2 system 903, the TRX1 system 902 returns to the idle state.

  On the other hand, in the TRX2 system 903, even if the occurrence and recovery of a failure occur in a short time, the TRX2 system 903 does not shift to the idle state because the specification is to transmit information to the ground equipment 904 without fail. In addition to the response waiting state, the recovery response reception state is entered. Therefore, when the TRX2 system 903 on the standby side switches the system 941 to the active side, the TRX2 system 903 acquires the transmission right, and the TRX2 system 903 that has remained in the response waiting state receives the occurrence notification 911 from the ground facility 904. On the other hand, it recognizes that it has not been reached and notifies the occurrence notification 931. As a result, the ground facility 904 erroneously recognizes that a failure 905 that has occurred in the past has occurred again.

JP 2010-258565 A

As described above, in the related art, when only the spare side transmitter / receiver does not reach the response from the ground facility, there is a problem that the number of occurrences of failures differs from the fact.
The present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide a wireless communication apparatus capable of accurately notifying a host apparatus of the occurrence of a failure.

  In order to achieve the above object, the wireless communication according to the present invention includes a first transmission / reception unit and a second transmission / reception unit that perform transmission / reception with a host device by radio, and the first transmission / reception unit and the second transmission / reception unit. A control unit configured to be set in each system, and when the control unit detects the occurrence of a failure, the control unit transmits a notification to that effect from the first transmission / reception unit or the second transmission / reception unit set in the active system to the higher-level device. The failure occurrence notification process is terminated based on the occurrence response from the higher-level device received by either the first transmission / reception unit or the second transmission / reception unit.

  As described above, the control unit collectively manages the notification of failure occurrence and the reception state of the occurrence response of the first transmission / reception unit and / or the second transmission / reception unit, thereby generating a system switching between the first transmission / reception unit and the second transmission / reception unit. It is possible to avoid a situation in which an unauthorized occurrence notification is transmitted, and it is possible to realize the coincidence between the number of failures occurring in the on-board station and the number of failures notified to the ground equipment.

  That is, according to the present invention, it is possible to provide a wireless communication apparatus that can accurately notify the host apparatus of the occurrence of a failure.

The block diagram of a train radio system. FIG. 6 is a flowchart showing state management processing related to retransmission in the main CPU of the wireless communication apparatus according to the embodiment. FIG. 5 is a diagram illustrating a failure occurrence recovery sequence of the wireless communication apparatus according to the present embodiment. FIG. In the wireless communication apparatus according to the present embodiment, a sequence in a case where the return from the ground facility has not reached the spare side only. In the wireless communication apparatus according to the present embodiment, a retransmission processing sequence when the return from the ground facility has not reached the working side and the backup side. A sequence of occurrence and recovery of a failure in a conventional wireless communication device In the conventional wireless communication apparatus, a retransmission processing sequence when the return from the ground facility has not reached the working side and the backup side. In the conventional wireless communication apparatus, a retransmission processing sequence in a case where the return from the ground facility has not reached only the spare side.

Embodiments of a wireless communication apparatus according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows a configuration diagram of a train radio system. The on-board station installs the first antenna 101 and the second antenna 102 at both ends of the vehicle, and exchanges information with the central apparatus 104 via the base station 103 via a wireless line. Hereinafter, the base station 103 and the central device 104 are collectively referred to as ground equipment (higher-order device).

  FIG. 2 shows a configuration diagram of the on-board station. The on-board station (wireless communication apparatus) includes a main CPU (control unit) 201 and a transceiver 202. The transceiver 202 includes two units, a TRX1 system (first transmitter / receiver) 203 and a TRX2 system (second transmitter / receiver) 204, and is connected to the first antenna 101 and the second antenna 102 of FIG.

  When receiving the polling signal 206 from the ground facility 205, the TRX1 system 203 and the TRX2 system 204 notify the main CPU 201 of the received electric field value 207, respectively. The main CPU 201 compares the received electric field values from the TRX1 system 203 and the TRX2 system 204, and designates the operation designation 208 or the spare designation 209 for the TRX1 system 203 and the TRX2 system 204 with the stronger one as the current and the weaker one as the spare. To be notified. FIG. 2 shows a case where the TRX1 system is the active side and the TRX2 system is the standby side.

Next, failure notification and recovery notification processing in the wireless communication apparatus according to the present embodiment will be described.
FIG. 3 is a flowchart showing state management processing regarding retransmission in the main CPU. When a failure state change occurs, the main CPU 201 performs a determination 301 on the active side. When the TRX1 system 203 is active, the processing 302 is executed, and when the TRX2 system 204 is active, the processing 303 is executed to notify the ground equipment 205 of the failure. After the notification, the response 304 from the ground equipment 205 is confirmed. If there is a response in either the TRX1 system 203 or the TRX2 system 204, the process is terminated. Start.

  That is, in this embodiment, the TRX1 system 203 and the TRX2 system 204, which are the transceivers 202, are dedicated to radio protocol processing and are configured not to perform any state management processing related to retransmission. On the other hand, the main CPU 201 performs failure detection processing and state management processing related to retransmission. By doing in this way, even if the system switching of the transceiver 202 occurs in the return state of the ground facility 205, the active side notifies the ground facility 205 of the failure, and if there is no return from the ground facility 205, again, A failure notification can be made from the active side.

  FIG. 4 shows a failure occurrence recovery sequence of the wireless communication apparatus according to the present embodiment. When a failure 405 occurs in the on-board station, the main CPU 201 notifies the occurrence notification 410 to the currently used TRX1 system 203 and enters a response waiting state. The TRX 1 system 203 notified of the occurrence notification 410 transmits the occurrence notification 411 to the ground facility 205. When the generation response 412 is returned from the ground facility 205, both the TRX1 system 203 and the TRX2 system 204 receive and notify the main CPU 201 of the generation response 413. The main CPU 201 adopts the generation response 413 of either the TRX1 system 203 or the TRX2 system 204 and returns to the idle state. The recovery from the failure 405 is the same sequence as the occurrence of the failure 405.

Further, since the TRX2 system 204 becomes the active side after the system switch 406 occurs, the main CPU 201 notifies the occurrence notification 430 to the active TRX2 system 204 when a failure 407 occurs.
FIG. 5 shows a sequence in the case where the return from the ground facility has not reached the spare side only in the wireless communication apparatus according to the present embodiment. When a failure 505 occurs in the on-board station, the main CPU 201 notifies the occurrence notification 510 to the currently used TRX1 system 203 and enters a response waiting state. The TRX 1 system 203 notified of the occurrence notification 510 transmits the occurrence notification 511 to the ground facility 205.

  Of the generation responses 512 from the ground facility 205, when the generation response 512 does not reach the standby TRX2 system 204 and the generation response 512 reaches the active TRX1 system 203, the TRX1 system 203 sends the generation response 513 to the main CPU 201. Notify The main CPU 201 receives the generation response 513 of the TRX1 system 203 and returns to the idle state. The recovery from the failure 505 is the same sequence as the occurrence of the failure 405.

After the system switch 506 occurs, the TRX2 system 204 becomes the active side, and therefore when the failure 507 occurs, the main CPU 201 notifies the TRX2 system 204 that is in use the occurrence notification 530.
The TRX1 system 203 and the TRX2 system 204 do not have a state as in the prior art, and in this embodiment, the state is collectively managed by the main CPU 201, so that an illegal occurrence notification generated by system switching between the TRX1 system 203 and the TRX2 system 204 is performed. Can be avoided. That is, after the system switching occurrence 506, the main CPU 201 reliably prevents the TRX2 system 204 that has become the active side without receiving the occurrence response 512 from re-notifying the occurrence of the fault occurrence 505.

  FIG. 6 shows a retransmission processing sequence in the case where the return from the ground facility has not reached the working side and the backup side in the wireless communication apparatus according to the present embodiment. When a failure 605 occurs in the on-board station, the main CPU 201 notifies the TRX 1 system 203 that is currently in use of an occurrence notification 610 and waits for a response. The TRX 1 system 203 notified of the occurrence notification 610 transmits the occurrence notification 611 to the ground facility 205.

  The ground facility 205 returns the generation response 612. If the generation response 612 has not reached the TRX1 system 203 and the TRX2 system 204, the main CPU 201 retransmits the generation notification 613 to the TRX1 system 203 on the active side. The TRX1 system 203 receives the generation notification 613 from the main CPU 201 and retransmits the generation notification 614 to the ground facility 205. When the generation response 615 of the ground facility 205 reaches the TRX1 system 203 and the TRX2 system 204, the main CPU 201 stops the retransmission process and returns to the idle state. In the case of failure recovery, the sequence is the same as the occurrence of the failure 605.

  As described above, in the above embodiment, the state management process related to retransmission for the TRX1 system and the TRX2 system, which are transceivers, is configured to be collectively performed by the main CPU. By configuring in this way, it is possible to avoid a situation in which an unauthorized occurrence notification that occurs due to system switching between the TRX1 system and the TRX2 system is transmitted. Therefore, even if system switching occurs between the TRX1 system and the TRX2 system, the number of faults that occurred at the on-board station and the number of faults notified by the ground equipment are the same, and the occurrence and recovery of faults are accurately reported to the ground equipment. Notification can be made.

In the above-described embodiment, the failure occurrence notification is mainly described. However, since the failure recovery notification is performed in the same manner, it is needless to say that the same effect as the failure occurrence notification can be obtained for the failure recovery notification. Yes.
In short, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 101 ... 1st antenna, 102 ... 2nd antenna, 103 ... Base station, 104 ... Central apparatus, 201 ... Main CPU, 202 ... Transceiver, 203 ... TRX1 system, 204 ... TRX2 system, 205 ... Ground equipment.

Claims (1)

A first transmission / reception unit and a second transmission / reception unit that transmit and receive wirelessly to a host device;
A control unit configured to set the first transmission / reception unit and the second transmission / reception unit to the active system / standby system, respectively.
When detecting the occurrence of a failure, the control unit causes the first transmission / reception unit or the second transmission / reception unit set to the active system to transmit a notification to that effect to the higher-level device, and the first transmission / reception unit and the second transmission / reception unit The failure occurrence notification process is terminated based on the occurrence response from the higher-level device received by any one of the units.

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