JP6165199B2 - Wireless communication system - Google Patents

Description

  The technology disclosed in this specification relates to a wireless communication system, and more particularly to a wireless communication system including an active wireless device and a standby wireless device.

  Conventionally, a radio device (hereinafter also referred to as a train radio device) is mounted on a train as a means for contacting an operation command center or a means for arranging emergency relief. In recent years, along with the digitization of wireless communication systems including such wireless devices, not only conventional voice notifications but also transmission of traffic control information or information on train operation status (ie health information) It is used and its reliability is required to be improved.

  For this reason, each railway company employs a system that performs redundancy control between wireless devices arranged at the beginning and the end of vehicle formation, as described in Non-Patent Document 1, for example, to duplicate the system. There is movement. In the non-patent document 1, each wireless main body device arranged at the head and the tail of the vehicle formation is connected to an operation unit arranged at the head and the tail of the vehicle formation, respectively. Of these, the working wireless device realizes communication between the crew room and the operation command.

  In said nonpatent literature 1, the radio | wireless apparatus of an onboard station is provided with a main body apparatus and an operation part (operation panel). The radio device at the vehicle station at one end of the vehicle formation and the radio device at the vehicle station at the opposite end are connected by a passing communication line before and after vehicle formation.

  The main unit is a radio transmission / reception unit for communicating with the ground station, a control unit, a communication unit for mutual communication between the control unit and the operation unit, and a switch for selecting a communication line used by the communication unit. And a switch.

  The passing communication line before and after the vehicle formation includes an operation unit control communication line and a redundant control communication line. The control unit of the on-board station radio device exchanges control information with the operation unit via the communication unit, the changeover switch, and the operation unit control communication line.

  The changeover switch in the active wireless device connects the communication unit of the main device to the first operation unit and the last operation unit. The changeover switch in the standby radio apparatus connects the communication unit of the main unit and the redundant control communication line, and connects the operation unit control communication line and the redundant control communication line.

  By such an operation, the control unit of the active main unit controls the first operation unit and the last operation unit before and after the vehicle formation, and the control unit of the standby main unit controls the main unit of the active system. Data communication regarding redundant control can be performed with the control unit of the apparatus.

  As switching control between the active system and the standby system, first, both control units mutually monitor the operating state of the counterpart wireless device via the redundant control communication line, and a failure occurs in the active wireless device. Is detected, the changeover switch is controlled based on a predetermined sequence. The standby radio device is switched to the active system, and the active radio device is switched to the standby system. By being controlled in this way, it is possible to maintain communication with facilities on the ground side such as an operation command center.

  In such a duplex system, it is important to ensure the reliability of the control information transmission path for performing redundant control due to the long train organization of the train. As a means for ensuring the reliability of the control information transmission path for performing redundant control in a system with a duplex configuration, there is a method of duplexing the control information transmission path.

  For example, Patent Document 1 discloses a technique for duplexing a common bus and switching a corresponding bus line to a standby system based on the bit position of the interface IC that has failed due to the duplex control using the common bus method. According to such a technique, it is possible to prevent the system from shutting down even when a short circuit occurs particularly to the common bus.

  Also, for example, in Patent Document 2, when the tracking signal (redundant control signal) cannot be exchanged, the function is achieved by continuing the signal exchange via a different common line different from the intended purpose. Techniques for maintaining are disclosed.

  In the above-described Patent Document 1, the on-board station wireless device includes a main body device and an operation unit. The radio device at the vehicle station at one end of the vehicle formation and the radio device at the vehicle station at the opposite end are connected by a passing communication line before and after the vehicle formation consisting of two communication lines.

  The main device includes a wireless transmission / reception unit, a control unit, a communication unit, and a redundant switch that selects a communication line used by the communication unit. The operation unit includes a redundant switch.

  The control unit of the on-board station radio device exchanges control information with the operation unit via the communication unit, the redundant switch, the passing communication line before and after one vehicle formation, and the redundant switch. Do.

  If the passing communication lines before and after the formation of the vehicle are duplicated, the changeover switch in the main unit has a very complicated configuration. Therefore, the passing communication line before and after the vehicle formation is not configured by the operation unit control communication line and the redundant control communication line, but, for example, a high-level data link control (HDLC) link line It is composed of two communication lines of the multipoint serial transmission method, and the changeover switch is omitted.

  In the above configuration, since the passing communication lines before and after the vehicle formation are duplexed, it is necessary to select and switch the passing communication lines before and after the vehicle formation. The redundant switch of the main unit switches the connection of the communication unit of the main unit and further switches the connection of the passing communication line before and after the vehicle formation. In addition, the redundant switch of the operation unit performs connection switching of the operation unit, and further, connection switching of the passing communication line before and after the vehicle formation.

  A specific method for selecting the front and rear passing communication lines is, for example, that the control unit in the working radio apparatus determines which of the passing communication lines before and after the vehicle formation is used, and the working radio apparatus. The redundant switch of the main unit is controlled. For the remaining redundant switches, a method of automatically selecting the one having the received signal is employed.

JP 2001-188714 A International Publication No. 2013/111240

Kanto Railway Association, “Digital Train Radio System Common Specification 1.0 Version 1st Volume”, page 1-19 (Fig. 1.8.5-1, Fig. 1.8.5.1-1, Fig. 1) 8.5.2-1)

  In a train radio device, when a redundant system is used by performing redundancy control between the radio devices arranged at the beginning and the end of the vehicle organization, the redundant control transmission line connecting the preceding and following radio devices becomes long. . For example, a conventional train with a 10-car train will be 200 m or longer. Therefore, there is a high possibility of disconnection or short circuit.

  Further, it is generally known that the vehicle body potential of a railway vehicle that runs on electricity has a large potential difference of about several tens of volts or more before and after the vehicle formation due to the influence of a voltage drop due to the drive current. Therefore, the redundant control communication line connecting before and after the vehicle formation needs to be insulated from the main unit and the operation unit for security reasons. Therefore, the changeover switch tends to have a large and complicated structure.

  In order to avoid this problem, it is assumed that a multipoint serial transmission type communication line that does not require a changeover switch is employed. However, when the redundant control transmission line is short-circuited, even if all the devices are healthy, there is a possibility that a so-called system down state may occur in which no operation can be performed from any of the operation units before and after.

  In order to avoid such a system down, it is conceivable to double the communication line of the multipoint serial transmission system. However, a jumper cable for passing electric wiring to a connecting portion between vehicles has a limitation in the number of laying wires and the number of accommodated wires, and such redundant control transmission lines are often difficult to duplicate.

  Even if the redundant control transmission line can be duplicated, the redundant multi-point serial transmission system communication line is likely to be short-circuited or disconnected at the same time as a result of being accommodated in the same multicore jumper cable. The effect of duplicating the line cannot be sufficiently obtained.

  The technology disclosed in the present specification is for solving the above-described problems, and relates to a wireless communication system that has a relatively simple configuration and can prevent system down.

  A wireless communication system according to an aspect of the technology disclosed in the present specification is a first wireless device that is a working wireless device that wirelessly communicates with the outside, and a standby wireless device that wirelessly communicates with the outside. 2 wireless devices, the first wireless device includes a first main body device and a first operation unit that communicates with the first main body device, the second wireless device includes a second main body device, and the second main device. A second operation unit that communicates with the main device, wherein the first main device uses the first communication unit, the second communication unit, and any one of the first communication unit and the second communication unit. A first control unit that performs communication control, and the second main body device uses a third communication unit, a fourth communication unit, and any one of the third communication unit and the fourth communication unit. A second control unit for performing communication control, wherein the first operation unit and the second operation unit are connected to the communication line. The first communication unit is connected to the lead-in communication line, and is connected to the first operation unit, and the second communication unit is not connected to the lead-in communication line, The third communication unit is connected to the passing communication line, and the third communication unit is connected to the second operating unit, and the fourth communication unit is connected to the passing communication line. And is connected to the second operation unit.

  A wireless communication system according to another aspect of the technology disclosed in the present specification is a first wireless device that is a working wireless device that wirelessly communicates with the outside, and a standby wireless device that wirelessly communicates with the outside. A second wireless device, the first wireless device includes a first main body device and a first operation unit communicating with the first main body device, the second wireless device includes a second main body device, and the first main device. A second operation unit that communicates with the two main unit, wherein the first main unit controls the first communication unit, a first changeover switch that switches a communication path of the first communication unit, and the first changeover switch. A second control unit that controls the second changeover switch, a second changeover switch that switches a communication path of the second communication unit, and a second control unit that controls the second changeover switch. The first operation unit and the second operation unit Are connected by a passing communication line, and the first changeover switch is connected to the passing communication line, and is connected to the first operating section, and the passing communication line is The second communication path that is not connected and that is connected to the first operation unit can be switched, and the second changeover switch is connected to the passing communication line and is connected to the second operation unit. The third communication path to be connected and the fourth communication path that is not connected to the passing communication line and that is connected to the second operation unit can be switched.

  A wireless communication system according to an aspect of the technology disclosed in the present specification is a first wireless device that is a working wireless device that wirelessly communicates with the outside, and a standby wireless device that wirelessly communicates with the outside. 2 wireless devices, the first wireless device includes a first main body device and a first operation unit that communicates with the first main body device, the second wireless device includes a second main body device, and the second main device. A second operation unit that communicates with the main device, wherein the first main device uses the first communication unit, the second communication unit, and any one of the first communication unit and the second communication unit. A first control unit that performs communication control, and the second main body device uses a third communication unit, a fourth communication unit, and any one of the third communication unit and the fourth communication unit. A second control unit for performing communication control, wherein the first operation unit and the second operation unit are connected to the communication line. The first communication unit is connected to the lead-in communication line, and is connected to the first operation unit, and the second communication unit is not connected to the lead-in communication line, The third communication unit is connected to the passing communication line, and the third communication unit is connected to the second operating unit, and the fourth communication unit is connected to the passing communication line. And is connected to the second operation unit.

  According to such a configuration, system down can be prevented without using a changeover switch. Therefore, it is easy to ensure electrical insulation performance between the communication line and the main unit.

  A wireless communication system according to another aspect of the technology disclosed in the present specification is a first wireless device that is a working wireless device that wirelessly communicates with the outside, and a standby wireless device that wirelessly communicates with the outside. A second wireless device, the first wireless device includes a first main body device and a first operation unit communicating with the first main body device, the second wireless device includes a second main body device, and the first main device. A second operation unit that communicates with the two main unit, wherein the first main unit controls the first communication unit, a first changeover switch that switches a communication path of the first communication unit, and the first changeover switch. A second control unit that controls the second changeover switch, a second changeover switch that switches a communication path of the second communication unit, and a second control unit that controls the second changeover switch. The first operation unit and the second operation unit Are connected by a passing communication line, and the first changeover switch is connected to the passing communication line, and is connected to the first operating section, and the passing communication line is The second communication path that is not connected and that is connected to the first operation unit can be switched, and the second changeover switch is connected to the passing communication line and is connected to the second operation unit. The third communication path to be connected and the fourth communication path that is not connected to the passing communication line and that is connected to the second operation unit can be switched.

  According to such a configuration, system down can be prevented without using a complicated configuration changeover switch.

  The objectives, features, aspects, and advantages of the technology disclosed in this specification will become more apparent from the detailed description and the accompanying drawings provided below.

It is a figure which illustrates the case where the duplication system is comprised between the radio | wireless apparatuses arrange | positioned at the head and the tail of vehicle organization regarding embodiment. FIG. 2 is a diagram illustrating a case where a passing communication line before and after vehicle formation is duplexed in the wireless communication system illustrated in FIG. 1. 1 is a diagram schematically illustrating an overall configuration for realizing a wireless communication system according to an embodiment. FIG. 6 is a diagram illustrating a state in which a passing communication line before and after vehicle formation is short-circuited in the middle of vehicle formation for some reason, according to the embodiment. It is a figure which illustrates the state by which the passing communication line before and behind vehicle formation was disconnected (opened) in the middle of vehicle formation by train separation etc. regarding the embodiment. It is a figure which illustrates a mode that the radio | wireless apparatus before and behind vehicle organization operate | moves as an active system in the case illustrated by FIG. 4 or FIG. 1 is a diagram schematically illustrating an overall configuration for realizing a wireless communication system according to an embodiment. 1 is a diagram schematically illustrating an overall configuration for realizing a wireless communication system according to an embodiment. 1 is a diagram schematically illustrating an overall configuration for realizing a wireless communication system according to an embodiment. 1 is a diagram schematically illustrating an overall configuration for realizing a wireless communication system according to an embodiment. It is a figure which illustrates a mode that both radio | wireless apparatuses operate | move as an active system by circumstances, such as the connection communication line before and behind vehicle organization short-circuited or disconnected regarding embodiment. It is a figure which illustrates a mode that both radio | wireless apparatuses operate | move as an active system by circumstances, such as the connection communication line before and behind vehicle organization short-circuited or disconnected regarding embodiment.

  Embodiments will be described below with reference to the accompanying drawings. Note that the drawings are schematically shown, and the mutual relationship between the size and position of images shown in different drawings is not necessarily described accurately, and can be appropriately changed. Moreover, in the description shown below, the same code | symbol is attached | subjected and shown in the same component, and it is the same also about those names and functions. Therefore, the detailed description about them may be omitted.

<First Embodiment>
Hereinafter, the radio | wireless communications system regarding this embodiment is demonstrated.

<Configuration>
FIG. 1 is a diagram illustrating a case where a duplex system is configured between wireless devices arranged at the beginning and the end of vehicle formation. The onboard station radio apparatus 200a includes a main body apparatus 101a and an operation unit 102a (operation panel).

  The on-board station wireless device 200b includes a main body device 101b and an operation unit 102b (operation panel). The onboard station radio apparatus 200a at one end of the vehicle formation and the onboard station radio apparatus 200b at the opposite end are connected by a through communication line 3a before and after the vehicle formation.

  The main unit 101a is used by the wireless transmission / reception unit 111a for performing communication with the ground station, the control unit 112a, the communication unit 113a for communication between the control unit 112a and the operation unit 102a, and the communication unit 113a. And a change-over switch 114a for selecting a communication line to be used.

  The main unit 101b is used by the wireless transmission / reception unit 111b for performing communication with the ground station, the control unit 112b, the communication unit 113b for communication between the control unit 112b and the operation unit 102b, and the communication unit 113b. And a selector switch 114b for selecting a communication line to be used.

  The through communication line 3a before and after the vehicle formation includes an operation unit control communication line 32a, an operation unit control communication line 32b, and a redundant control communication line 31. And the control part 112a of the radio | wireless apparatus 200a of an onboard station exchanges control information between the operation parts 102a via the communication part 113a, the changeover switch 114a, and also the operation part control communication line 32a. The control unit 112b of the on-board station radio apparatus 200b exchanges control information with the operation unit 102b via the communication unit 113b, the changeover switch 114b, and the operation unit control communication line 32b. In addition, the control unit 112b of the on-board station radio device 200b receives the communication unit 113b, the changeover switch 114b, the redundant control communication line 31, the changeover switch 114a, and the communication unit 113a. Control information is exchanged with the control unit 112a.

  Here, it is assumed that the onboard station radio apparatus 200a is operating as an active system and the onboard station radio apparatus 200b is operating as a standby system. The changeover switch 114a in the active wireless device 200a connects the communication unit 113a of the main device 101a to the operation unit 102a and the operation unit 102b. The changeover switch 114b in the standby radio apparatus 200b connects the communication unit 113b and the redundant control communication line 31 of the main body apparatus 101b, and connects the operation unit control communication line 32b and the redundant control communication line 31.

  By such an operation, the control unit 112a of the main body device 101a controls both the operation unit 102a and the operation unit 102b before and after the vehicle formation, and the control unit 112b of the main body device 101b is controlled by the control unit 112a of the main body device 101a. It is possible to perform data communication regarding redundancy control.

  As the switching control between the active system and the standby system, first, both the control units 112a and 112b monitor the operation state of the counterpart wireless device through the redundant control communication line 31, and When a failure or the like in the system radio apparatus 200a is detected, the selector switch 114a and the selector switch 114b are controlled based on a predetermined sequence. Then, the standby radio apparatus 200b is switched to the active system, and the active radio apparatus 200a is switched to the standby system. By being controlled in this way, it is possible to maintain communication with facilities on the ground side such as an operation command center.

  In such a duplex system, it is important to ensure the reliability of the control information transmission path for performing redundant control due to the long train organization of the train. As a means for ensuring the reliability of the control information transmission path for performing redundant control in a system with a duplex configuration, there is a method of duplexing the control information transmission path.

  For example, in the duplex control using the common bus method, the common bus is duplexed, and the corresponding bus line is switched to the standby system based on the bit position of the interface IC that has failed. According to such a technique, it is possible to prevent the system from shutting down even when a short circuit occurs particularly to the common bus.

  Further, for example, when the tracking signal (redundant control signal) cannot be transmitted / received, the function is maintained by continuing the signal transmission / reception via another common line different from the original purpose of use.

  FIG. 2 is a diagram illustrating a case where the passing communication lines before and after the vehicle formation are duplexed in the wireless communication system illustrated in FIG. The onboard radio apparatus 200c includes a main body apparatus 101c and an operation unit 102c.

  The on-board station wireless device 200d includes a main body device 101d and an operation unit 102d. The onboard station radio apparatus 200c at one end of the vehicle formation and the onboard station radio apparatus 200d at the opposite end are connected by a through communication line 3b before and after the vehicle formation.

  The main device 101c includes a wireless transmission / reception unit 111a, a control unit 112a, a communication unit 113a, and a redundant switch 115a that selects a communication line used by the communication unit 113a.

  The main unit 101d includes a wireless transmission / reception unit 111b, a control unit 112b, a communication unit 113b, and a redundant switch 115b that selects a communication line used by the communication unit 113b.

  The operation unit 102c includes a redundant switch 121a. The operation unit 102d includes a redundant switch 121b.

  The through communication line 3b before and after the vehicle formation includes a communication line 311a and a communication line 311b. The control unit 112a of the onboard radio apparatus 200c exchanges control information with the operation unit 102c via the communication unit 113a, the redundant switch 115a, the communication line 311a, and further the redundant switch 121a. In addition, the control unit 112a of the on-board station radio apparatus 200c exchanges control information with the operation unit 102c via the communication unit 113a, the redundant switch 115a, the communication line 311b, and the redundant switch 121a. .

  Similarly, the control unit 112b of the onboard station radio apparatus 200d exchanges control information with the operation unit 102d via the communication unit 113b, the redundant switch 115b, the communication line 311a, and further the redundant switch 121b. Do. Further, the control unit 112b of the on-board station radio device 200d exchanges control information with the operation unit 102d via the communication unit 113b, the redundant switch 115b, the communication line 311b, and further the redundant switch 121b. .

  If the passing communication lines before and after the formation of the vehicle are duplicated, the changeover switch in the main unit has a very complicated configuration. Therefore, in the configuration illustrated in FIG. 2, the passing communication line 3b before and after the vehicle formation is not a configuration including the operation unit control communication line and the redundant control communication line, for example, a high-level data link control HDLC link line. The communication line 311a and the communication line 311b of the multipoint serial transmission method are configured, and the changeover switch is omitted.

  In the above configuration, since the passing communication line 3b before and after the vehicle formation is duplexed, it is necessary to select and switch the passing communication line 3b before and after the vehicle formation. The redundant switch 115a and the redundant switch 115b perform connection switching between the communication unit 113a of the main body device 101c and the communication unit 113b of the main body device 101d, and further, connection switching between the communication line 311a and the communication line 311b. Further, the redundant switch 121a and the redundant switch 121b perform connection switching between the operation unit 102c and the operation unit 102d, and further connection switching between the communication line 311a and the communication line 311b.

  A specific method for selecting the front and rear passing communication line is, for example, that the control unit 112a in the active radio apparatus 200c determines which of the communication line 311a and the communication line 311b is used, and sets the redundant switch 115a. Control. The remaining redundant switch 115b, redundant switch 121a, and redundant switch 121b adopt a method such as automatically selecting the one having the received signal.

  FIG. 3 is a diagram schematically illustrating an overall configuration for realizing the wireless communication system according to the present embodiment. The on-board station wireless device 100a that performs wireless communication with the outside includes a main body device 1a and an operation unit 2a that communicates with the main body device 1a. The on-board station wireless device 100b that communicates wirelessly with the outside includes a main body device 1b and an operation unit 2b that communicates with the main body device 1b. The wireless device 100a is an active wireless device. The wireless device 100b is a standby wireless device.

  The main body device 1a is used by the wireless transmission / reception unit 11a for performing communication with the ground station, the control unit 12a, the communication unit 13a for communication between the control unit 12a and the operation unit 2a, and the communication unit 13a. And a change-over switch 16a for selecting a communication line to be used.

  The main body device 1b is used by the wireless transmission / reception unit 11b for performing communication with the ground station, the control unit 12b, the communication unit 13b for communication between the control unit 12b and the operation unit 2b, and the communication unit 13b. And a selector switch 16b for selecting a communication line to be used.

  The operation unit 2a includes a changeover switch 22a. The operation unit 2b includes a changeover switch 22b.

  The main unit 1a and the operation unit 2a are connected by a control line 4a. The main unit 1b and the operation unit 2b are connected by a control line 4b.

  Furthermore, the operation part 2a and the operation part 2b are connected by the through communication line 313 before and behind vehicle formation. In addition, the passing communication line 313 before and after the vehicle formation has a branch, and is connected to the changeover switch 16a and the changeover switch 16b, respectively.

  The control unit 12a communicates with the operation unit 2a and the operation unit 2b via the communication unit 13a, the changeover switch 16a, and the passing communication line 313 before and after vehicle formation to form a duplex configuration. Separately, the control unit 12a communicates with the operation unit 2a via the communication unit 13a, the changeover switch 16a, and the control line 4a between the main body device 1a and the operation unit 2a.

  The control unit 12b communicates with the operation unit 2a and the operation unit 2b via the communication unit 13b, the changeover switch 16b, and the passing communication line 313 before and after vehicle formation to form a duplex configuration. Separately, the control unit 12b communicates with the operation unit 2b via the communication unit 13b, the changeover switch 16b, and the control line 4b between the main body device 1b and the operation unit 2b.

  In a normal state, the changeover switch 16a of the main body device 1a selects the passing communication line 313 before and after the vehicle formation as a communication line used by the communication unit 13a. Further, in a normal state, the changeover switch 16b of the main body device 1b selects the passing communication line 313 before and after the vehicle formation as the communication line used by the communication unit 13b.

  The active wireless device 100a performs wireless communication with a ground station (not shown here) in accordance with the operations at the operation unit 2a and the operation unit 2b before and after being connected by the passing communication line 313 before and after the vehicle formation. .

  Further, the control unit 12a and the control unit 12b communicate with each other through the passing communication line 313 before and after the vehicle formation. By doing this, the state of the counterpart wireless device is checked.

  When a failure occurs in the active radio apparatus 100a, the control unit 12b of the standby radio apparatus 100b detects this. Then, the control unit 12b of the main body device 1b shifts the standby radio device 100b to the active system. In addition, the control unit 12b of the main body device 1b requests the control unit 12a of the main body device 1a to shift the wireless device 100a from the active system to the standby system through the passing communication line 313 before and after the vehicle formation. In response to the request from the control unit 12b, the control unit 12a of the main body device 1a shifts the active radio device 100a to the standby system.

<Action>
FIG. 4 is a diagram illustrating a state in which the passing communication line 313 before and after the vehicle formation is short-circuited in the middle of the vehicle formation due to some cause in the wireless communication system according to the present embodiment.

  As illustrated in FIG. 4, when the passing communication line 313 before and after the vehicle formation is short-circuited, the control unit 12a of the main body device 1a is controlled by the control unit 12b, the operation unit 2a, and the operation unit of the main body device 1b. It becomes impossible to communicate with 2b. Similarly, the control unit 12b of the main device 1b cannot communicate with the control unit 12a, the operation unit 2a, and the operation unit 2b of the counterpart main unit 1a.

  When the control unit 12a of the main body device 1a detects the above state, that is, a state in which communication with the control unit 12b, the operation unit 2a, and the operation unit 2b of the counterpart main body device 1b cannot be performed. It is determined that the passing communication line 313 before and after the vehicle formation is short-circuited. Then, the control unit 12a of the main device 1a causes the changeover switch 16a to select the control line 4a between the main device 1a and the operation unit 2a as a communication line used by the communication unit 13a.

  Further, the control unit 12b of the main body device 1b has detected the above-described state, that is, a state in which communication with the control unit 12a, the operation unit 2a, and the operation unit 2b of the counterpart main body device 1a cannot be performed. In this case, it is determined that the passing communication line 313 before and after the vehicle formation is short-circuited. Then, the control unit 12b of the main device 1b causes the changeover switch 16b to select the control line 4b between the main device 1b and the operation unit 2b as a communication line used by the communication unit 13b.

  As described above, the selection at the changeover switch 16a is switched to the control line 4a and the selection at the changeover switch 16b is changed to the control line 4b, so that the connection between the main unit 1a and the operation unit 2a which is the operation unit in the host vehicle is performed. The connection is restored, and the connection between the main unit 1b and the operation unit 2b which is an operation unit in the host vehicle is restored. Then, the onboard radio apparatus 100a and the onboard station radio apparatus 100b start operating as active radio apparatuses, respectively, so that communication with the ground station (not shown here) is maintained. .

  In this case, the changeover switch 22a in the operation unit 2a operates preferentially by receiving a control signal from the control line 4a between the main body device 1a and the operation unit 2a, thereby causing a flaw in the changeover control. It is possible to maintain its function without doing so.

  Further, in this case, the changeover switch 22b in the operation unit 2b receives the control signal from the control line 4b between the main body device 1b and the operation unit 2b preferentially and operates, thereby causing a flaw in the changeover control. It is possible to maintain its function without doing so.

  FIG. 5 is a diagram illustrating a state in which the passing communication line 313 before and after the vehicle formation is disconnected (opened) in the middle of the vehicle formation due to train separation or the like in the wireless communication system according to the present embodiment.

  As illustrated in FIG. 5, when the passing communication line 313 before and after the vehicle formation is disconnected, the control unit 12 a of the main body device 1 a is connected to the control unit 12 b of the counterpart main body device 1 b and further to the operation unit 2 b. Communication between them becomes impossible. Similarly, the control unit 12b of the main device 1b cannot communicate with the control unit 12a of the counterpart main device 1a and further with the operation unit 2a.

  The control unit 12a of the main body device 1a is in the above-described state, that is, the state in which communication with the control unit 12b of the counterpart main body device 1b and the operation unit 2b is not possible (between the operation unit 2a). When the communication communication line 313 before and after the vehicle formation is disconnected, or the power supply of the counterpart wireless device 100b is stopped. Then, the control unit 12a of the main body device 1a causes the changeover switch 16a to maintain selection of the passing communication line 313 before and after vehicle formation as the communication line used by the communication unit 13a.

  Further, the control unit 12b of the main body device 1b is in the above state, that is, a state in which communication with the control unit 12a of the counterpart main body device 1a and the operation unit 2a is not possible (with the operation unit 2b). In other words, it is determined that the passing communication line 313 before and after the vehicle formation is disconnected, or that the power of the counterpart wireless device 100a is stopped. And the control part 12b of the main body apparatus 1b makes the changeover switch 16b maintain selecting the passing communication line 313 before and behind vehicle formation as a communication line which the communication part 13b uses.

  As described above, the selection in the changeover switch 16a is maintained in the passing communication line 313 before and after the vehicle formation, and the selection in the changeover switch 16b is maintained in the passing communication line 313 before and after the vehicle formation. Then, the onboard radio apparatus 100a and the onboard station radio apparatus 100b start operating as active radio apparatuses, respectively, so that communication with the ground station (not shown here) is maintained. .

  According to the above configuration, the reconnection of the passing communication line 313 or the restoration of the power supply of the counterpart wireless device can be detected by the recovery of the communication of the passing communication line 313 before and after the vehicle formation. . Therefore, it is possible to recover to a duplex configuration before and after normal vehicle formation as exemplified in FIG.

  FIG. 6 is a diagram illustrating a state in which both the wireless device 100a and the wireless device 100b before and after vehicle formation operate as the active system in the case illustrated in FIG. 4 or 5 in the wireless communication system according to the present embodiment. is there. In FIG. 6, a communication procedure in the main device 1a and the main device 1b is particularly illustrated.

  When the onboard station radio apparatus 100a and the onboard station radio apparatus 100b operate as active radio apparatuses, respectively, the onboard station radio apparatus 100a and the vehicle on the call signal 71 from the ground station apparatus 6 When the upper station radio apparatus 100b responds normally, the response signal 72a from the upper station radio apparatus 100a and the response signal 72b from the upper station radio apparatus 100b are simultaneously returned to the ground station apparatus 6. Become. In that case, the response signal 72a and the response signal 72b interfere with each other, and the ground station apparatus 6 cannot receive properly.

  In order to avoid this, in the present embodiment, in response to the call signal 71 from the ground station device 6, the on-board station radio device 100 a and the on-board station radio device 100 b correspond in advance to the own car number information. After the set response waiting time elapses, the response signal 72a or the response signal 72b is transmitted to the ground station device 6, respectively. That is, when the radio device 100a of the on-board station receives the call signal 71 from the ground station device 6 at the transmission / reception antenna 10a, the response waiting time set in advance corresponding to the vehicle number information 18a of the own vehicle has elapsed. The response signal 72a is transmitted to the ground station device 6. Further, when the radio device 100b of the on-board station receives the calling signal 71 from the ground station device 6 at the transmission / reception antenna 10b, the on-station radio device 100b corresponds to the car information 18a set in advance corresponding to the car information 18b of the own vehicle. The response signal 72b is transmitted to the ground station apparatus 6 after a response waiting time different from the response waiting time set in the above elapses.

  As a result of the above operation, it is possible to avoid the response signals before and after vehicle formation from interfering with each other.

  When a time division multiple access method (TDMA method) is adopted as a wireless communication control method with the ground station, a response signal from the wireless device 100a of the onboard station and the wireless of the onboard station are used. As means for avoiding interference with the response signal from apparatus 100b, response signal 72a and response signal 72b are transmitted in different time slots on the uplink instead of the response time difference between response signal 72a and response signal 72b. As such, it may be assigned in advance.

  The ground station device 6 adopts only the first response signal when receiving a response signal from the same train twice, and returns a signal indicating a stop instruction to the response signal arriving late. The double allocation of communication resources may be avoided. For example, when the response signal 72a is the first arrival and the response signal 72b is the last arrival with respect to the calling signal 71 from the ground station device 6, the ground station device 6 determines whether the onboard station By instructing the allocation of the communication line with the response signal 73 to the radio apparatus 100a and instructing the end of the connection with the response signal 74 to the radio apparatus 100b of the onboard station, the communication channel is duplicated for the same train. It is possible to avoid being assigned.

  In addition, the ground station device 6 does not instruct the one of them to end the connection to the onboard station radio device 100a and the onboard station radio device 100b that have responded in a double manner. You may transmit the response signal 73 and the response signal 74 which show that it is a response to the radio | wireless apparatus 100a of an onboard station, and the radio apparatus 100b of an onboard station. When the on-board station radio device 100a and the on-board station radio device 100b receive a response signal indicating that the response is double, the preset car stops transmission of the signal. It may have a function.

Second Embodiment
A wireless communication system according to this embodiment will be described. In the following, the same components as those described in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

<Configuration>
In the first embodiment, switching between the lead-in communication line and the control line is performed by a changeover switch. In the present embodiment, as a configuration that replaces the changeover switch, each main body device includes a plurality of communication units.

  FIG. 7 is a diagram schematically illustrating an overall configuration for realizing the wireless communication system according to the present embodiment. The on-board station wireless device 100c includes a main body device 1c and an operation unit 2c. The on-board station wireless device 100d includes a main body device 1d and an operation unit 2d.

  The main body device 1c includes a wireless transmission / reception unit 11a, a control unit 12c, a communication unit 132a for communication between the control unit 12c and the operation unit 2c, and a communication unit 131a.

  The main device 1d includes a wireless transmission / reception unit 11b, a control unit 12d, a communication unit 132b for communication between the control unit 12d and the operation unit 2d, and a communication unit 131b.

  The operation unit 2c includes a communication unit 23a and a communication unit 24a. The operation unit 2d includes a communication unit 23b and a communication unit 24b.

  The main device 1c and the operation unit 2c are connected by a control line 4c. The main unit 1d and the operation unit 2d are connected by a control line 4d.

  Furthermore, the operation part 2c and the operation part 2d are connected by the through communication line 314 before and behind vehicle formation. The leading communication line 314 before and after the vehicle formation has a branch and is connected to the communication unit 131a and the communication unit 131b.

  The control unit 12c communicates with the operation unit 2c and the operation unit 2d via the communication unit 131a and the passing communication line 314 before and after vehicle formation to form a duplex configuration. Separately, the control unit 12c communicates with the operation unit 2c via the communication unit 132a and the control line 4c between the main body device 1c and the operation unit 2c. The control unit 12c can select which of the communication units 131a and 132a to use information from.

  The control unit 12d communicates with the operation unit 2c and the operation unit 2d via the communication unit 131b and the passing communication line 314 before and after the vehicle formation to form a duplex configuration. Separately from this, the control unit 12d communicates with the operation unit 2d via the communication unit 132b and the control line 4d between the main device 1d and the operation unit 2d. The control unit 12d can select which of the communication units 131b and 132b to use information from.

  Further, when the main device 1c cannot communicate with the operation unit 2d and the main device 1d and can communicate with the operation unit 2c, the control unit 12c performs communication using the communication unit 131a. Do.

  In addition, when the main device 1d cannot communicate with the operation unit 2c and the main device 1c and can communicate with the operation unit 2d, the control unit 12d performs communication using the communication unit 131b. Do.

  According to said structure, the complicated control of a changeover switch becomes unnecessary. Therefore, it is easy to ensure electrical insulation performance between the communication line and the main unit.

  When the main device 1c cannot communicate with the operation unit 2c, the operation unit 2d, and the main device 1d, the control unit 12c performs communication using the communication unit 132a. Further, the control unit 12d performs communication using the communication unit 132b when the main body device 1d cannot communicate with the operation unit 2c, the operation unit 2d, and the main body device 1c.

  The operation unit 2c can select which of the communication unit 23a and the communication unit 24a to use information from. Further, the operation unit 2d can select which of the communication units 23b and the communication unit 24b to use information from.

  According to said structure, the complicated control of a changeover switch becomes unnecessary. Therefore, it is easy to ensure electrical insulation performance between the communication line and the operation unit.

<Third Embodiment>
A wireless communication system according to this embodiment will be described. In the following, the same components as those described in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

<Configuration>
In the first embodiment, a short-circuit of the passing communication line before and after the vehicle formation causes the control unit in the main body device to receive no signals from the control unit in the counterpart main body device or from both operation units at all. Detected. In the present embodiment, the health check signal is used to periodically check the short-circuit of the passing communication line before and after the vehicle formation by periodically checking the control unit in the active wireless device.

  FIG. 8 is a diagram schematically illustrating an overall configuration for realizing the wireless communication system according to the present embodiment. The on-board station wireless device 100e includes a main body device 1e and an operation unit 2a. The on-board station wireless device 100f includes a main device 1f and an operation unit 2b.

  The main device 1e includes a wireless transmission / reception unit 11a, a control unit 12e, a communication unit 13a for communication between the control unit 12e and the operation unit 2a, and a changeover switch 16a.

  The main device 1f includes a wireless transmission / reception unit 11b, a control unit 12f, a communication unit 13b for communication between the control unit 12f and the operation unit 2b, and a changeover switch 16b.

  The operation unit 2a includes a changeover switch 22a. The operation unit 2b includes a changeover switch 22b.

  The main device 1e and the operation unit 2a are connected by a control line 4a. The main unit 1f and the operation unit 2b are connected by a control line 4b.

  Furthermore, the operation part 2a and the operation part 2b are connected by the through communication line 313 before and behind vehicle formation. In addition, the passing communication line 313 before and after the vehicle formation has a branch, and is connected to the changeover switch 16a and the changeover switch 16b, respectively.

  The control unit 12e of the wireless device 100e transmits a health check command 51a to the operation unit 2a. Then, the operation unit 2a that has received the health check command 51a transmits a health check response 52a to the control unit 12e of the wireless device 100e. The control unit 12e of the wireless device 100e transmits a health check command 51b to the operation unit 2b. Then, the operation unit 2b that has received the health check command 51b transmits a health check response 52b to the control unit 12e of the wireless device 100e.

  Further, the control unit 12e of the main body device 1e and the control unit 12f of the main body device 1f regularly exchange the health check information 53 with each other. By doing so, it mutually confirms that the other party's main unit is operating effectively.

  The control unit 12e in the active wireless device 100e includes a health check response 52a from the operation unit 2a, a health check response 52b from the operation unit 2b, and health check information from the control unit 12f in the standby wireless device 100f. If 53 cannot be received, it is determined that the passing communication line 313 before and after the vehicle formation is short-circuited. Then, the control unit 12e in the active wireless device 100e causes the changeover switch 16a to select the control line 4a between the main body device 1e and the operation unit 2a as a communication line used by the communication unit 13a. In this manner, the control unit 12e in the active wireless device 100e maintains the wireless communication function. When it is determined that the passing communication line 313 before and after the vehicle formation is short-circuited, the control unit 12e of the main body device 1e stops exchanging the health check information 53 with the control unit 12f of the main body device 1f. .

  On the other hand, the control unit 12f in the standby radio device 100f receives the health check response 52a from the operation unit 2a, the health check response 52b from the operation unit 2b, and further from the control unit 12e in the active radio device 100e. When the health check information 53 cannot be received, it is determined that the passing communication line 313 before and after the vehicle formation is short-circuited. Then, the control unit 12f in the main device 1f causes the changeover switch 16b to select the control line 4b between the main device 1f and the operation unit 2b as a communication line used by the communication unit 13b. In this way, the control unit 12f in the standby radio apparatus 100f maintains the radio communication function while operating as the active system.

  As in the case exemplified in the first embodiment, when a health check response or health check information cannot be received only between the control unit of the counterpart main unit, and further with the counterpart operation unit, It is determined that the passing communication line before and after the vehicle formation is disconnected, and the respective wireless devices operate as the active system while the changeover switch 16a and the changeover switch 16b are in the state where the passing communication line 313 before and after the vehicle formation is selected. It is also possible to make it.

  According to the configuration exemplified in the present embodiment, it is possible to positively detect a short circuit or disconnection of the passing communication line 313 before and after the vehicle formation as compared to the case exemplified in the first embodiment. Therefore, it is possible to reduce the period during which the function is stopped when a short circuit or disconnection occurs. In the configuration illustrated in the second embodiment, it is also possible to perform a short circuit detection operation before and after vehicle formation using the health check signal in the present embodiment.

<Fourth embodiment>
A wireless communication system according to this embodiment will be described. In the following, the same components as those described in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

<Configuration>
In the first embodiment, a short-circuit of the passing communication line before and after the vehicle formation causes the control unit in the main body device to receive no signals from the control unit in the counterpart main body device or from both operation units at all. Detected. In this embodiment, a short circuit of the passing communication line before and after the vehicle formation is detected by partially feeding back the communication with the passing communication line before and after the vehicle formation.

  FIG. 9 is a diagram schematically illustrating an overall configuration for realizing the wireless communication system according to the present embodiment. As illustrated in FIG. 9, the on-board station wireless device 100g includes a main body device 1g and an operation unit 2a. The on-board station wireless device 100h includes a main body device 1h and an operation unit 2b.

  The main device 1g includes a wireless transmission / reception unit 11a, a control unit 12g, a communication unit 13a, and a changeover switch 16a. The main device 1h includes a wireless transmission / reception unit 11b, a control unit 12h, a communication unit 13b, and a changeover switch 16b.

  The operation unit 2a includes a changeover switch 22a. The operation unit 2b includes a changeover switch 22b.

  The main device 1g and the operation unit 2a are connected by a control line 4a. The main unit 1h and the operation unit 2b are connected by a control line 4b.

  The operation unit 2a and the operation unit 2b are connected by a passing communication line 313 before and after vehicle formation. In addition, the passing communication line 313 before and after the vehicle formation has a branch, and is connected to the changeover switch 16a and the changeover switch 16b, respectively.

  Further, the passing communication line 313 before and after the vehicle formation is connected to the communication unit 13a because the communication line connected to the changeover switch 16a further has a branch. A communication line connected from the branch to the communication unit 13a, that is, returning to the communication unit 13a is defined as a self-return connection path 54a. Moreover, the communication line 313 before and after the vehicle formation has a branch further connected to the changeover switch 16b, and is connected to the communication unit 13b. A communication line connected from the branch to the communication unit 13b, that is, returning to the communication unit 13b is set as a self-return connection path 54b.

  The control unit 12g communicates with the operation unit 2a and the operation unit 2b via the communication unit 13a, the changeover switch 16a, and the passing communication line 313 before and after vehicle formation to form a duplex configuration. Separately, the control unit 12g communicates with the operation unit 2a via the communication unit 13a, the changeover switch 16a, and the control line 4a between the main body device 1g and the operation unit 2a.

  The control unit 12h communicates with the operation unit 2a and the operation unit 2b via the communication unit 13b, the changeover switch 16b, and the passing communication line 313 before and after vehicle formation to form a duplex configuration. Separately, the control unit 12h communicates with the operation unit 2b via the communication unit 13b, the changeover switch 16b, and the control line 4b between the main body device 1h and the operation unit 2b.

  When the control unit 12g in the active wireless device 100g detects a state in which communication with the control unit 12h, the operation unit 2a, and the operation unit 2b of the counterpart main unit 1h cannot be performed, the control unit 12g performs self-return. It receives its own transmission signal through the connection path 54a. Then, the control unit 12g in the main body device 1g determines that the passing communication line 313 before and after the vehicle formation is short-circuited when the own transmission signal cannot be correctly received, that is, when the own transmission signal cannot be received. Then, the control unit 12g of the main device 1g causes the changeover switch 16a to select the control line 4a between the main device 1g and the operation unit 2a as a communication line used by the communication unit 13a. In this way, the control unit 12g of the main device 1g maintains the wireless communication function.

  In addition, when the control unit 12h in the standby radio apparatus 100h detects a state in which communication cannot be performed between the control unit 12g, the operation unit 2a, and the operation unit 2b of the counterpart main unit 1g, The own transmission signal is received through the self-return connection path 54b. Then, the control unit 12h in the main body device 1h determines that the passing communication line 313 before and after the vehicle formation is short-circuited when the own transmission signal cannot be correctly received, that is, when the own transmission signal cannot be received. Then, the control unit 12h of the main device 1h causes the changeover switch 16b to select the control line 4b between the main device 1h and the operation unit 2b as a communication line used by the communication unit 13b. By doing in this way, the control part 12h of the main body apparatus 1h maintains the function of radio | wireless communication, operate | moving as an active system.

  When the control unit 12g of the main device 1g can correctly receive its own transmission signal through the self-return connection path 54a (that is, when it can receive the same signal as its own transmission signal). When the control unit 12h of the main device 1h can correctly receive its own transmission signal through the self-return connection path 54b (that is, when it can receive the same signal as its own transmission signal). ) Determines that the passing communication line 313 before and after the vehicle formation is disconnected, or that the power of the counterpart wireless device is stopped.

  Then, the control unit 12g of the main body device 1g causes the changeover switch 16a to maintain selection of the passing communication line 313 before and after vehicle formation as the communication line used by the communication unit 13a. In addition, the control unit 12h of the main body device 1h causes the changeover switch 16b to maintain selection of the passing communication line 313 before and after the vehicle formation as a communication line used by the communication unit 13b.

  In addition, when the synchronous transmission method is adopted as the communication method of the passing communication line 313 before and after the vehicle formation, the signal from the control unit and the operation unit of both sides cannot be received. Instead of receiving the own transmission signal through the self-turnback path, the own transmission signal may be received through the self-turnback path when mutual synchronization of the communication transmission path cannot be maintained.

  By performing the above operation, it is possible to detect a short circuit or disconnection of the passing communication line 313 before and after the vehicle formation more actively than in the first embodiment. In addition, the detection result can be confirmed by determining whether or not the transmission signal of the device itself has been correctly received through the self-return connection path. Further, unlike the case of the third embodiment, since it is not necessary to constantly transmit and receive a health check signal, the period when the function is stopped when a short circuit or disconnection occurs without pressing the transmission capacity of the communication path is set. It is possible to keep it short.

  FIG. 10 is a diagram schematically illustrating an overall configuration for realizing the wireless communication system according to the present embodiment. The on-board station wireless device 100i includes a main body device 1i and an operation unit 2c. The on-board station wireless device 100j includes a main body device 1j and an operation unit 2d.

  The main unit 1i includes a wireless transmission / reception unit 11a, a control unit 12i, a communication unit 132a for communication between the control unit 12i and the operation unit 2c, a communication unit 131a, and a communication line used by the communication unit 131a. And a selector switch 17a to be selected.

  The main device 1j includes a wireless transmission / reception unit 11b, a control unit 12j, a communication unit 132b for communication between the control unit 12j and the operation unit 2d, a communication unit 131b, and a communication line used by the communication unit 131b. And a selector switch 17b to be selected.

  The operation unit 2c includes a communication unit 23a and a communication unit 24a. The operation unit 2d includes a communication unit 23b and a communication unit 24b.

  The main unit 1i and the operation unit 2c are connected by a control line 4c. The main unit 1j and the operation unit 2d are connected by a control line 4d.

  Furthermore, the operation part 2c and the operation part 2d are connected by the through communication line 314 before and behind vehicle formation. In addition, the leading communication line 314 before and after the vehicle formation has a branch and is connected to the changeover switch 17a and the changeover switch 17b, respectively.

  One of the changeover switches 17a connected from the communication unit 131a is connected to the communication line 314, and the other is connected to the communication unit 131a. That is, the other of the changeover switch 17a is a communication line fed back to the communication unit 131a. The communication line is referred to as a self-return connection path 171a.

  One of the changeover switches 17b connected from the communication unit 131b is connected to the communication line 314 and the other is connected to the communication unit 131b. That is, the other of the changeover switch 17b is a communication line fed back to the communication unit 131b. The communication line is assumed to be a self-return connection path 171b.

  The control unit 12i communicates with the operation unit 2c and the operation unit 2d via the communication unit 131a, the changeover switch 17a, and the passing communication line 314 before and after vehicle formation to form a duplex configuration. Separately, the control unit 12i communicates with the operation unit 2c via the communication unit 132a and the control line 4c between the main body device 1i and the operation unit 2c. The control unit 12i can select which of the communication units 131a and 132a to use information from.

  The control unit 12j communicates with the operation unit 2c and the operation unit 2d via the communication unit 131b, the changeover switch 17b, and the passing communication line 314 before and after vehicle formation to form a duplex configuration. Separately from this, the control unit 12j communicates with the operation unit 2d via the communication unit 132b and the control line 4d between the main device 1j and the operation unit 2d. The control unit 12j can select which one of the communication units 131b and 132b to use information from.

  The operation unit 2c can select which of the communication unit 23a and the communication unit 24a to use information from. Further, the operation unit 2d can select which of the communication units 23b and the communication unit 24b to use information from.

  When the control unit 12i detects a state in which communication with the control unit 12j, the operation unit 2c, and the operation unit 2d on the other side cannot be performed, the control unit 12i receives its own transmission signal through the self-return connection path 171a. . Then, the control unit 12i determines that the passing communication line 314 before and after the vehicle formation is short-circuited when the own transmission signal cannot be correctly received, that is, when the own transmission signal cannot be received. Then, the control unit 12i performs communication using the communication unit 132a connected to the control line 4c. In this way, the control unit 12i maintains the wireless communication function.

  In addition, when the control unit 12j detects a state in which communication with the other-side control unit 12i, the operation unit 2c, and the operation unit 2d cannot be performed, the control unit 12j transmits its own transmission signal through the self-return connection path 171b. Receive. Then, the control unit 12j determines that the passing communication line 314 before and after the vehicle formation is short-circuited when the own transmission signal cannot be correctly received, that is, when the own transmission signal cannot be received. The control unit 12j performs communication using the communication unit 132b connected to the control line 4d. In this way, the control unit 12j maintains the wireless communication function while operating as an active system.

  In addition, when the control part 12i can receive the own transmission signal correctly through the self-turnback connection path 171a (that is, when the same signal as the own transmission signal can be received), and the control When the unit 12j can correctly receive its own transmission signal through the self-return connection path 171b (that is, when it can receive the same signal as its own transmission signal), the pulling before and after the vehicle formation is performed. It is determined that the through communication line 314 is disconnected or that the power of the counterpart wireless device is stopped.

  And the control part 12i communicates using the communication part 131a. The control unit 12j communicates using the communication unit 131b.

  According to the above configuration, it is possible to positively detect a short circuit or disconnection of the passing communication line 314 before and after vehicle formation. In addition, the detection result can be confirmed by determining whether or not the transmission signal of the device itself has been correctly received through the self-return connection path. Further, complicated control of the changeover switch is not necessary. Therefore, it is easy to ensure electrical insulation performance between the communication line and the operation unit.

<Fifth Embodiment>
A wireless communication system according to this embodiment will be described. In the following, the same components as those described in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

<Configuration>
In the first embodiment, the call signal from the ground station device 6 is used when both wireless devices operate as the active system due to circumstances such as the passing communication line 313 before and after vehicle formation is short-circuited or disconnected. On the other hand, each wireless device transmits a response signal after a response waiting time set in advance corresponding to its own car information has elapsed. By doing so, it was avoided that the response signals before and after vehicle formation interfere with each other.

  However, as illustrated in FIG. 11, instead of own car information, a response signal is transmitted after a response waiting time set in advance corresponding to the before / after information notified from the driving device of the vehicle has passed. By doing so, the response signals before and after the vehicle formation may be prevented from interfering with each other.

  FIG. 11 is a diagram exemplifying a state in which both wireless devices operate as an active system due to circumstances such as a short-circuit or disconnection of a passing communication line before and after vehicle formation in the wireless communication system according to the present embodiment. In FIG. 11, in particular, a communication procedure in the main device 1a and the main device 1b is illustrated.

  In the present embodiment, in response to the call signal 71 from the ground station device 6, the on-board station radio device 100a and the on-board station radio device 100b correspond in advance to the before-and-after information notified from the driving device of the vehicle. After the set response waiting time elapses, the response signal 72a or the response signal 72b is transmitted. That is, when the radio device 100a of the on-board station receives the call signal 71 from the ground station device 6 at the transmission / reception antenna 10a, the response signal after the response waiting time set in advance corresponding to the front / rear information 19a has elapsed. 72a is transmitted. Further, when the radio device 100b of the on-board station receives the call signal 71 from the ground station device 6 at the transmission / reception antenna 10b, the radio device 100b is set corresponding to the front / rear information 19a set in advance corresponding to the front / rear information 19b. The response signal 72b is transmitted after a response waiting time different from the response waiting time has elapsed.

  As a result of the above operation, it is possible to avoid the response signals before and after vehicle formation from interfering with each other.

  Further, when the ground station device 6 receives response signals from the same train twice, only the first arrival signal is adopted, and a stop instruction is given to the response signal that arrives late, so that two communication resources can be used. Double allocation can be avoided. At this time, it is possible to give priority to the connection with the ground station device 6 for the radio device on the side where the driver is on board. This is particularly important when performing a one-man operation.

  Further, the configuration illustrated in FIG. 11 may be applied to a configuration in which a plurality of communication units are provided in each main apparatus, for example, as illustrated in FIG.

<Sixth Embodiment>
A wireless communication system according to this embodiment will be described. In the following, the same components as those described in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

<Configuration>
In the first embodiment, the call signal from the ground station device 6 is used when both wireless devices operate as the active system due to circumstances such as the passing communication line 313 before and after vehicle formation is short-circuited or disconnected. On the other hand, each wireless device transmits a response signal after a response waiting time set in advance corresponding to its own car information has elapsed. By doing so, it was avoided that the response signals before and after vehicle formation interfere with each other.

  However, as illustrated in FIG. 12, at least one of the active system and the standby system is provided with an auxiliary reception antenna that is different from the transmission / reception antenna, and an auxiliary reception unit corresponding to the auxiliary reception antenna is provided. Thus, by transmitting a response signal only when the counterpart wireless device does not respond to the call signal from the ground station device within a preset response waiting time, a response signal before and after vehicle formation May interfere with each other.

  FIG. 12 is a diagram exemplifying a state in which both wireless devices operate as an active system due to circumstances such as a passing communication line before and after vehicle formation being short-circuited or disconnected in the wireless communication system according to the present embodiment. The on-board station wireless device 100a includes a main body device 1a and an operation unit 2a. The on-board station wireless device 100k includes a main body device 1k and an operation unit 2b.

  The main body device 1k includes a wireless transmission / reception unit 11b, a control unit 12k, a communication unit 13b for communication between the control unit 12k and the operation unit 2b, a changeover switch 16b, and an auxiliary reception unit 11c. The main device 1k and the operation unit 2b are connected by a control line 4b. The auxiliary receiving unit 11c may be provided in the main body device 1a.

  The control unit 12k communicates with the operation unit 2a and the operation unit 2b via the communication unit 13b, the changeover switch 16b, and the passing communication line 313 before and after the vehicle formation to form a duplex configuration. Separately, the control unit 12k communicates with the operation unit 2b via the communication unit 13b, the changeover switch 16b, and the control line 4b between the main body device 1k and the operation unit 2b.

  In the present embodiment, in response to the call signal 71 from the ground station device 6, one of the on-board station radio device 100 a and the on-board station radio device 100 k transmits a response signal within a preset response waiting time. Send. For example, when the radio device 100a of the on-board station receives the call signal 71 from the ground station device 6 at the transmission / reception antenna 10a, the response signal 72a is received by the ground station device 6 and the auxiliary reception within a preset response waiting time. Transmit to the antenna 10c.

  When the on-station radio apparatus 100k receives the calling signal 71 from the ground station apparatus 6 at the transmission / reception antenna 10b, the on-station radio apparatus 100a at the auxiliary reception antenna 10c within a preset response waiting time. It is determined whether or not the response signal 72a has been received. Then, the response signal 72b is transmitted to the ground station device 6 only when the auxiliary reception antenna 10c cannot receive the response signal 72a from the on-board station radio device 100a within a preset response waiting time. . That is, when the auxiliary reception antenna 10c can receive the response signal 72a from the in-vehicle station radio device 100a within the preset response waiting time, the radio device 100k transmits the response signal 72b to the ground station device 6. do not do.

  As a result of the above operation, it is possible to avoid the response signals before and after vehicle formation from interfering with each other. In addition, it is possible to prevent a double response of the on-board station, and the ground station device 6 does not need to avoid a process of avoiding double allocation of communication resources. Therefore, it is possible to prevent the system processing capacity from being lowered.

  Note that the auxiliary receiving unit 11c and the auxiliary receiving antenna 10c may be provided in both the radio apparatus 100a and the radio apparatus 100k.

  In addition, by using the own car information or before / after information notified from the driving device of the vehicle, a car that preferentially transmits a response signal is set in advance, and the other party's wireless device is connected to the ground station within the response waiting time. The response signal may be transmitted only when the response signal is not transmitted with respect to the calling signal 71 of the device 6.

  Further, the configuration illustrated in FIG. 12 may be applied to a configuration in which a plurality of communication units are provided in each main apparatus, for example, as illustrated in FIG.

<Effect>
Below, the effect by said embodiment is illustrated. In the following, effects based on the specific configuration exemplified in the above-described embodiment will be described. However, other similar configurations exemplified in the present specification may be substituted within a range where the similar effect is generated. May be. In addition, the replacement may be performed across a plurality of embodiments. In other words, the configurations exemplified in different embodiments may be combined to produce the same effect.

  According to the above-described embodiment, the wireless communication system includes the wireless device 100a corresponding to the first wireless device that is the active wireless device that wirelessly communicates with the outside, and the standby wireless device that wirelessly communicates with the outside. A wireless device 100b corresponding to a certain second wireless device.

  The wireless device 100a includes a main body device 1a corresponding to the first main body device and an operation unit 2a corresponding to the first operation unit communicating with the main body device 1a.

  The wireless device 100b includes a main body device 1b corresponding to the second main body device and an operation unit 2b corresponding to the second operation unit communicating with the main body device 1b.

  The main body device 1a corresponds to a communication unit 13a corresponding to the first communication unit, a changeover switch 16a corresponding to a first changeover switch that switches the communication path of the communication unit 13a, and a first control unit that controls the changeover switch 16a. And a control unit 12a.

  The main body device 1b corresponds to a communication unit 13b corresponding to the second communication unit, a changeover switch 16b corresponding to a second changeover switch that switches the communication path of the communication unit 13b, and a second control unit that controls the changeover switch 16b. And a control unit 12b.

  Here, the operation unit 2 a and the operation unit 2 b are connected by a through communication line 313.

  The changeover switch 16a is connected to the passing communication line 313 and connected to the operation unit 2a, and the first communication path connected to the operating unit 2a is not connected to the passing communication line 313. The control line 4a corresponding to the second communication path can be switched.

  The changeover switch 16b is connected to the passing communication line 313 and connected to the operation unit 2b. The third communication path connected to the operating unit 2b is not connected to the passing communication line 313 and is connected to the operating unit 2b. The control line 4b corresponding to the fourth communication path can be switched.

  According to such a configuration, system down can be prevented without using a complicated configuration changeover switch.

  Specifically, by providing a control line that connects the main unit and the operation unit without being connected to the passing communication line 313, even if the passing communication line 313 is short-circuited or disconnected, the system is down. Thus, the operation of each wireless device can be maintained without causing any trouble.

  Further, the main device and the operation unit communicate with each other through the control line, so that both the radio device 100a and the radio device 100b can operate independently as the active radio device.

  In addition to these configurations, other configurations shown in the present specification can be omitted as appropriate. That is, the above effect can be produced only with these configurations. However, when at least one of the other configurations shown in this specification is appropriately added to the above configuration, that is, the other configurations shown in this specification that are not described as the above configuration are Even when added to the configuration, the above-described effects can be similarly produced.

  Further, according to the above embodiment, the control unit 12a controls the changeover switch 16a to control the communication unit 13a when the communication unit 13a cannot communicate with the operation unit 2a, the operation unit 2b, and the communication unit 13b. The communication path 13a is switched from the first communication path to the control line 4a.

  When the communication unit 13b cannot communicate with the operation unit 2a, the operation unit 2b, and the communication unit 13a, the control unit 12b controls the changeover switch 16b to change the communication path of the communication unit 13b to the third communication. The route is switched to the control line 4b.

  According to such a configuration, even when the lead-through communication line 313 is short-circuited, the operation unit and the main body device communicate with each other through the control line, so that the system is not down and the wireless communication function is maintained. can do.

  Further, according to the above-described embodiment, the changeover switch 16a includes the self-return connection path 54a corresponding to the first self-return connection path that returns to the communication unit 13a in the first communication path.

  In addition, the changeover switch 16b includes a self-return connection path 54b corresponding to the second self-return connection path that returns to the communication unit 13b in the third communication path.

  The control unit 12g corresponding to the first control unit cannot communicate with the communication unit 13a from the operation unit 2a, the operation unit 2b, and the communication unit 13b, and signals from the self-return connection path 54a to the communication unit 13a. Is not input, the selector switch 16a is controlled to switch the communication path of the communication unit 13a from the first communication path to the control line 4a.

  Further, the control unit 12h corresponding to the second control unit cannot communicate with the operation unit 2a, the operation unit 2b, and the communication unit 13a, and the communication unit 13b from the self-return connection path 54b. When the signal is not input to, the changeover switch 16b is controlled to switch the communication path of the communication unit 13b from the third communication path to the control line 4b.

  According to such a configuration, it is possible to positively detect a short circuit or disconnection of the passing communication line 313. Further, the detection result can be confirmed by determining whether or not the own transmission signal has been correctly received through the self-return connection path.

  Further, according to the above embodiment, when the main body device 1a communicates with the operation unit 2a via the control line 4a and the main body device 1b communicates with the operation unit 2b via the control line 4b, wireless communication with the outside is performed. The response signal 72a corresponding to the first transmission signal from the wireless device 100a at the time of transmission is transmitted at a timing different from the response signal 72b corresponding to the second transmission signal from the wireless device 100b at the time of wireless communication with the outside. The

  According to such a configuration, it is possible to avoid that the response signals from the wireless devices operating as the active system interfere with each other in the ground station device 6.

  Moreover, according to said embodiment, a radio | wireless communications system is equipped with the auxiliary | assistant receiving part 11c which receives the signal transmitted from the other at least one of the main body apparatus 1k corresponding to the main body apparatus 1a and a 2nd main body apparatus.

  The other of the main body device 1a and the main body device 1k, for example, the main body device 1a transmits a signal also to the auxiliary receiving unit 11c during wireless communication with the outside. Then, one of the main device 1a and the main device 1k, for example, the main device 1k is externally connected only when the auxiliary reception unit 11c does not receive a signal transmitted from the other within a preset time. A signal is transmitted during wireless communication.

  According to such a configuration, it is possible to avoid that the response signals from the wireless devices operating as the active system interfere with each other in the ground station device 6. In addition, since unnecessary transmission of response signals can be suppressed, it is possible to suppress degradation in performance of the entire wireless communication system.

  Moreover, according to said embodiment, the control part 12a cannot communicate between the communication part 13a between the operation part 2b and the communication part 13b, and can communicate between the operation part 2a. The changeover switch 16a is controlled to maintain the communication path of the communication unit 13a as the first communication path.

  Further, when the communication unit 13b cannot communicate with the operation unit 2a and the communication unit 13a and can communicate with the operation unit 2b, the control unit 12b controls the changeover switch 16b, The communication path of the communication unit 13b is maintained as the third communication path.

  According to such a configuration, even when the passing communication line 313 is disconnected, reconnection of the passing communication line 313 or restoration of the power supply of the counterpart wireless device is performed before and after the vehicle formation. It can be detected when the communication of the communication line 313 is restored. Then, it is possible to recover the duplex configuration before and after the normal vehicle organization as it is.

  Further, according to the above embodiment, the control unit 12e corresponding to the first control unit transmits the health check command 51a corresponding to the check signal from the communication unit 13a to the operation unit 2a. Further, the control unit 12e causes the health check command 51b corresponding to the check signal to be transmitted from the communication unit 13a to the operation unit 2b. Further, the control unit 12e causes the health check information 53 corresponding to the check signal to be transmitted from the communication unit 13a to the communication unit 13b.

  Then, the control unit 12e determines whether communication with the operation unit 2a has been made based on the presence or absence of the health check response 52a corresponding to the response signal from the operation unit 2a to the health check command 51a.

  Further, the control unit 12e determines whether communication with the operation unit 2b has been made based on the presence or absence of the health check response 52b corresponding to the response signal from the operation unit 2b to the health check command 51b.

  The control unit 12e determines whether communication with the communication unit 13b has been made based on the presence or absence of the health check information 53 corresponding to the response from the communication unit 13b.

  According to such a configuration, it is possible to detect the short-circuit or disconnection of the communication line 313 actively through. Therefore, it is possible to reduce the period during which the function is stopped when a short circuit or disconnection occurs.

  In addition, according to the above-described embodiment, the wireless communication system wirelessly communicates with the outside, the wireless device 100c corresponding to the first wireless device that is the active wireless device, and the standby wirelessly communicates with the outside. A wireless device 100d corresponding to a second wireless device that is a device.

  The wireless device 100c includes a main body device 1c corresponding to the first main body device and an operation unit 2c corresponding to the first operation unit communicating with the main body device 1c.

  The wireless device 100d includes a main body device 1d corresponding to the second main body device and an operation unit 2d corresponding to the second operation unit communicating with the main body device 1d.

  The main body device 1c performs communication control using the communication unit 131a corresponding to the first communication unit, the communication unit 132a corresponding to the second communication unit, and any one of the communication unit 131a and the communication unit 132a. And a control unit 12c corresponding to the control unit.

  The main device 1d performs communication control using the communication unit 131b corresponding to the third communication unit, the communication unit 132b corresponding to the fourth communication unit, and any one of the communication unit 131b and the communication unit 132b. A control unit 12d corresponding to the control unit.

  Here, the operation unit 2 c and the operation unit 2 d are connected by a lead-through communication line 314.

  The communication unit 131a is connected to the through communication line 314 and to the operation unit 2c. Further, the communication unit 132a is not connected to the through communication line 314 and is connected to the operation unit 2c. The communication unit 131b is connected to the lead-in communication line 314 and is also connected to the operation unit 2d. Further, the communication unit 132b is not connected to the through communication line 314 and is connected to the operation unit 2d.

  According to such a configuration, system down can be prevented without using a changeover switch. Therefore, it is easy to ensure electrical insulation performance between the communication line and the main unit.

  Specifically, by providing a communication unit that connects the main unit and the operation unit without being connected to the passing communication line 314, even if the passing communication line 314 is short-circuited or disconnected, the system is down. Thus, the operation of each wireless device can be maintained without causing any trouble.

  In addition to these configurations, other configurations shown in the present specification can be omitted as appropriate. That is, the above effect can be produced only with these configurations. However, when at least one of the other configurations shown in this specification is appropriately added to the above configuration, that is, the other configurations shown in this specification that are not described as the above configuration are Even when added to the configuration, the above-described effects can be similarly produced.

  Further, according to the above embodiment, the control unit 12c corresponding to the first control unit is configured such that the main unit 1c cannot communicate with the operation unit 2c, the operation unit 2d, and the main unit 1d. Communication control is performed using. The control unit 12d corresponding to the second control unit performs communication control using the communication unit 132b when the main device 1d cannot communicate with the operation unit 2c, the operation unit 2d, and the main device 1c.

  According to such a configuration, even when the lead-through communication line 314 is short-circuited, the operation unit and the main body device communicate with each other through the control line connected to one communication unit, thereby causing a system down. Therefore, the wireless communication function can be maintained.

  Further, according to the above embodiment, the main body device 1i corresponding to the first main body device includes the changeover switch 17a corresponding to the first changeover switch for switching the communication path of the communication unit 131a.

  The main device 1j corresponding to the second main device includes a changeover switch 17b corresponding to the second changeover switch for switching the communication path of the communication unit 131b.

  The changeover switch 17a is connected to the lead-in communication line 314 and connected to the operation unit 2c, and a self-return connection path 171a corresponding to the first self-return connection path returning to the communication unit 131a. Switching is possible.

  The change-over switch 17b is connected to the lead-in communication line 314 and is connected to the operation unit 2d, and the self-turnback connection route 171b corresponding to the second self-turnback connection route returning to the communication unit 131b. And can be switched.

  The control unit 12i corresponding to the first control unit cannot communicate with the main unit 1i from the operation unit 2c, the operation unit 2d, and the main unit 1j, and transmits a signal from the self-return connection path 171a to the communication unit 131a. Is not input, communication control is performed using the communication unit 132a.

  The control unit 12j corresponding to the second control unit cannot communicate with the main unit 1j between the operation unit 2c, the operation unit 2d, and the main unit 1i, and communicates with the communication unit 131b from the self-return connection path 171b. When the signal is not input to the communication unit, communication control is performed using the communication unit 132b.

  According to such a configuration, it is possible to positively detect a short circuit or disconnection of the passing communication line 314 before and after vehicle formation. In addition, the detection result can be confirmed by determining whether or not the transmission signal of the device itself has been correctly received through the self-return connection path. Further, complicated control of the changeover switch is not necessary. Therefore, it is easy to ensure electrical insulation performance between the communication line and the operation unit.

  In addition, according to the above embodiment, when the main body device 1c communicates with the operation unit 2c using the communication unit 132a, and the main body device 1d communicates with the operation unit 2d using the communication unit 132b, The response signal 72a corresponding to the first transmission signal from the wireless device 100c at the time of wireless communication is different from the response signal 72b corresponding to the second transmission signal from the wireless device 100d at the time of wireless communication with the outside. Sent at timing.

  According to such a configuration, it is possible to avoid that the response signals from the wireless devices operating as the active system interfere with each other in the ground station device 6.

  Moreover, according to said embodiment, at least one of the main body apparatus 1k corresponding to the main body apparatus 1c and the 2nd main body apparatus is equipped with the auxiliary | assistant receiving part 11c which receives the signal transmitted from the other.

  For example, the other of the main device 1c and the main device 1k transmits a signal to the auxiliary receiving unit 11c when the main device 1c performs wireless communication with the outside. Then, one of the main device 1c and the main device 1k, for example, the main device 1k is externally connected only when the auxiliary reception unit 11c does not receive a signal transmitted from the other within a preset time. A signal is transmitted during wireless communication.

  According to such a configuration, it is possible to avoid that the response signals from the wireless devices operating as the active system interfere with each other in the ground station device 6. In addition, since unnecessary transmission of response signals can be suppressed, it is possible to suppress degradation in performance of the entire wireless communication system.

  Further, according to the above-described embodiment, the control unit 12c is configured such that the main body device 1c cannot communicate with the operation unit 2d and the main body device 1d and can communicate with the operation unit 2c. Communication control is performed using the communication unit 131a. The control unit 12d controls communication using the communication unit 131b when the main body device 1d cannot communicate with the operation unit 2c and the main body device 1c and can communicate with the operation unit 2d. I do.

  According to such a configuration, even when the passing communication line 314 is disconnected, reconnection of the passing communication line 314 or restoration of the power supply of the counterpart wireless device is performed before and after the vehicle formation. It can be detected when the communication of the communication line 314 is recovered. Then, it is possible to recover the duplex configuration before and after the normal vehicle organization as it is.

  Further, according to the above embodiment, the control unit 12c corresponding to the first control unit responds to the check signal from the communication unit 131a corresponding to the first communication unit to the operation unit 2c corresponding to the first operation unit. To send a health check command. In addition, the control unit 12c transmits a health check command corresponding to the check signal from the communication unit 131a corresponding to the first communication unit to the operation unit 2d corresponding to the second operation unit. In addition, the control unit 12c transmits a health check command corresponding to the check signal from the communication unit 131a corresponding to the first communication unit to the communication unit 131b corresponding to the third communication unit.

  Then, the control unit 12c determines whether communication with the operation unit 2c is possible based on the presence or absence of a health check response corresponding to the response signal from the operation unit 2c to the health check command.

  Further, the control unit 12c determines whether or not communication with the operation unit 2d has been established based on the presence or absence of a health check response corresponding to a response signal from the operation unit 2d to the health check command.

  In addition, the control unit 12c determines whether communication with the communication unit 131b has been established based on the presence / absence of health check information corresponding to a response signal from the communication unit 131b to the health check command.

  According to such a configuration, it is possible to detect the short circuit or disconnection of the communication line 314 by actively passing through. Therefore, it is possible to reduce the period during which the function is stopped when a short circuit or disconnection occurs.

<Modification>
In the above-described embodiment, the dimensions, shapes, relative arrangement relations, or implementation conditions of each component may be described. However, these are examples in all aspects and are described in this specification. It is not limited to. Accordingly, innumerable modifications not illustrated are envisaged within the scope of the technology disclosed in this specification. For example, the case where at least one component is modified, added or omitted, and further, the case where at least one component in at least one embodiment is extracted and combined with the components of other embodiments are included. It is.

  In addition, as long as no contradiction arises, “one or more” components described as being provided with “one” in the above-described embodiment may be provided. Furthermore, each component is a conceptual unit, and one component consists of a plurality of structures, one component corresponds to a part of the structure, and a plurality of components. And the case where the component is provided in one structure. Each component includes a structure having another structure or shape as long as the same function is exhibited.

  Also, the descriptions in this specification are referred to for all purposes related to the present technology, and none of them is admitted to be prior art.

  In addition, each component described in the above embodiment is assumed to be software or firmware, or hardware corresponding thereto, and in both concepts, each component is a “unit” or “processing circuit” or the like. Called.

  1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 101a, 101b, 101c, 101d Main unit, 2a, 2b, 2c, 2d, 102a, 102b, 102c, 102d 3a, 3b, 313, 314 Lead-through communication line, 4a, 4b, 4c, 4d Control line, 6 Ground station device, 10a, 10b Transmit / receive antenna, 10c Auxiliary receive antenna, 11a, 11b, 111a, 111b Radio transmitter / receiver, 11c Auxiliary receiving unit, 12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h, 12i, 12j, 12k, 112a, 112b control unit, 13a, 13b, 23a, 23b, 24a, 24b, 113a, 113b, 131a, 131b, 132a, 132b communication unit, 16a, 16b, 17a, 17b, 22a, 22b, 114a, 114b changeover switch, 18a, 18b car information, 19a, 19b front and back information, 31 redundant control communication line, 32a, 32b operation unit control communication line, 51a, 51b health check command, 52a, 52b health check response 53 Health check information, 54a, 54b, 171a, 171b Self-return connection path, 71 Call signal, 72a, 72b, 73, 74 Response signal, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 200a, 200b, 200c, 200d Wireless device, 115a, 115b, 121a, 121b Redundant switch, 311a, 311b Communication line.

Claims (14)

A first wireless device that is an active wireless device for wireless communication with the outside;
A second wireless device that is a standby wireless device that wirelessly communicates with the outside,
The first wireless device includes a first main body device and a first operation unit that communicates with the first main body device,
The second wireless device includes a second main body device and a second operation unit that communicates with the second main body device,
The first main device includes a first communication unit, a second communication unit, and a first control unit that performs communication control using any one of the first communication unit and the second communication unit,
The second main body device includes a third communication unit, a fourth communication unit, and a second control unit that performs communication control using any one of the third communication unit and the fourth communication unit,
The first operation unit and the second operation unit are connected by a through communication line,
The first communication unit is connected to the lead-in communication line and connected to the first operation unit.
The second communication unit is not connected to the passing communication line and is connected to the first operation unit,
The third communication unit is connected to the lead-in communication line and connected to the second operation unit;
The fourth communication unit is not connected to the passing communication line and is connected to the second operation unit.
Wireless communication system. The first control unit controls communication using the second communication unit when the first main body device cannot communicate with the first operation unit, the second operation unit, and the second main body device. And
The second control unit controls communication using the fourth communication unit when the second main body device cannot communicate with the first operation unit, the second operation unit, and the first main body device. I do,
The wireless communication system according to claim 1. The first main body device further includes a first changeover switch for switching a communication path of the first communication unit,
The second main body device further includes a second changeover switch for switching a communication path of the third communication unit,
The first change-over switch can be switched between a first communication path connected to the lead-in communication line and connected to the first operation unit, and a first self-return connection path returning to the first communication unit. And
The second change-over switch can be switched between a second communication path connected to the lead-in communication line and connected to the second operation unit, and a second self-return connection path returning to the third communication unit. And
The first control unit is configured such that the first main body device cannot communicate with the first operation unit, the second operation unit, and the second main body device, and from the first self-return connection path. When no signal is input to the first communication unit, communication control is performed using the second communication unit,
The second control unit is configured such that the second main body device cannot communicate with the first operation unit, the second operation unit, and the first main body device, and from the second self-return connection path. When no signal is input to the third communication unit, communication control is performed using the fourth communication unit.
The radio | wireless communications system of Claim 1 or Claim 2. When the first main unit communicates with the first operation unit using the second communication unit, and the second main unit communicates with the second operation unit using the fourth communication unit ,
The first transmission signal from the first wireless device at the time of wireless communication with the outside is transmitted at a timing different from the second transmission signal from the second wireless device at the time of wireless communication with the outside.
The wireless communication system according to claim 2 or claim 3. At least one of the first main body device and the second main body device further includes an auxiliary receiving unit that receives a signal transmitted from the other,
The other of the first main body device and the second main body device also transmits a signal to the auxiliary receiving unit during wireless communication with the outside,
Only when one of the first main device and the second main device does not receive the signal transmitted from the other within the preset time in the auxiliary receiving unit, wireless communication with the outside Send a signal when
The wireless communication system according to claim 4. The first control unit is configured such that when the first main body device cannot communicate with the second operation unit and the second main body device and can communicate with the first operation unit, Communication control is performed using the first communication unit,
The second control unit is configured such that when the second main body device cannot communicate with the first operation unit and the first main body device and can communicate with the second operation unit, Communication control is performed using the third communication unit.
The wireless communication system according to claim 1. The first control unit transmits a check signal from the first communication unit to the first operation unit, the second operation unit, and the third communication unit, and the first operation unit for the check signal, Based on the presence / absence of response signals from the second operation unit and the third communication unit, it is determined whether communication has been established between the first operation unit, the second operation unit, and the third communication unit. To
The wireless communication system according to any one of claims 1 to 6. A first wireless device that is an active wireless device for wireless communication with the outside;
A second wireless device that is a standby wireless device that wirelessly communicates with the outside,
The first wireless device includes a first main body device and a first operation unit that communicates with the first main body device,
The second wireless device includes a second main body device and a second operation unit that communicates with the second main body device,
The first main body device includes a first communication unit, a first changeover switch that switches a communication path of the first communication unit, and a first control unit that controls the first changeover switch.
The second main body device includes a second communication unit, a second changeover switch that switches a communication path of the second communication unit, and a second control unit that controls the second changeover switch,
The first operation unit and the second operation unit are connected by a through communication line,
The first changeover switch is connected to the passing communication line and is not connected to the first communication path connected to the first operation unit and the passing communication line, and the first operation is performed. The second communication path connected to the unit can be switched,
The second changeover switch is connected to the passing communication line and connected to the second operation unit, and the second communication switch is not connected to the passing communication line, and the second operation switch The fourth communication path connected to the unit can be switched.
Wireless communication system. The first control unit controls the first changeover switch when the first communication unit cannot communicate with the first operation unit, the second operation unit, and the second communication unit, Switching the communication path of the first communication unit from the first communication path to the second communication path;
The second control unit controls the second changeover switch when the second communication unit cannot communicate with the first operation unit, the second operation unit, and the first communication unit, Switching the communication path of the second communication unit from the third communication path to the fourth communication path;
The wireless communication system according to claim 8. The first changeover switch further includes a first self-return connection path that returns to the first communication unit in the first communication path,
The second changeover switch further includes a second self-return connection path that returns to the second communication unit in the third communication path,
The first control unit is configured such that the first communication unit cannot communicate with the first operation unit, the second operation unit, and the second communication unit, and from the first self-return connection path. When no signal is input to the first communication unit, the first switching switch is controlled to switch the communication path of the first communication unit from the first communication path to the second communication path,
The second control unit is configured such that the second communication unit cannot communicate with the first operation unit, the second operation unit, and the first communication unit, and from the second self-return connection path. When no signal is input to the second communication unit, the second switch is controlled to switch the communication path of the second communication unit from the third communication path to the fourth communication path;
The wireless communication system according to claim 8 or 9. When the first main body device communicates with the first operation unit through the second communication path, and the second main body device communicates with the second operation unit through the fourth communication path,
The first transmission signal from the first wireless device at the time of wireless communication with the outside is transmitted at a timing different from the second transmission signal from the second wireless device at the time of wireless communication with the outside.
The wireless communication system according to claim 9 or 10. At least one of the first main body device and the second main body device further includes an auxiliary receiving unit that receives a signal transmitted from the other,
The other of the first main body device and the second main body device also transmits a signal to the auxiliary receiving unit during wireless communication with the outside,
Only when one of the first main device and the second main device does not receive the signal transmitted from the other within the preset time in the auxiliary receiving unit, wireless communication with the outside Send a signal when
The wireless communication system according to claim 11. When the first control unit cannot communicate between the second operation unit and the second communication unit and the first control unit can communicate with the first operation unit, Controlling the first changeover switch to maintain the communication path of the first communication unit as the first communication path;
When the second control unit cannot communicate between the first operation unit and the first communication unit and the second control unit can communicate with the second operation unit, Controlling the second changeover switch to maintain the communication path of the second communication unit as the third communication path;
The wireless communication system according to claim 8. The first control unit transmits a check signal from the first communication unit to the first operation unit, the second operation unit, and the second communication unit, and the first operation unit for the check signal, Based on the presence / absence of a response signal from the second operation unit and the second communication unit, it is determined whether communication has been established between the first operation unit, the second operation unit, and the second communication unit. To
The wireless communication system according to any one of claims 8 to 13.

Images