JP6549504B2 - Host device and relay device - Google Patents

Description

  The present invention relates to a wireless communication system configured by a host device and a relay device to perform multi-hop communication.

  A wireless sensor network, which is a wireless communication system consisting of a host device and a relay device, transfers sensor data from sensor nodes installed at various locations of a monitored object to the host device by multi-hop communication via the relay device (relay node). It is a communication system to collect (for example, refer to patent documents 1).

JP, 2009-206749, A

  When considering applying the wireless sensor network to a vehicle condition monitoring system for monitoring the condition of a railway vehicle, it is conceivable to install a sensor on each vehicle and aggregate sensor data on a per-train basis. However, it is difficult to apply the wireless sensor network to a vehicle condition monitoring system as it is based on the premise that the monitoring target is fixedly determined in the first place. That is, when the trains to be monitored by the vehicle state monitoring system are increased in number of vehicles (the increase, closing, or both, the same applies hereinafter) or another vehicle state monitoring system is operated. Other trains may be close by wireless communication distance. It is necessary to consider these railway-specific issues.

  It will be described more specifically. There are a static construction method and a dynamic construction method as a construction method of a communication network related to multi-hop communication. In the static communication network construction method, it is necessary to design in advance a route between relay devices for transferring sensor data, and to set a designed route for each relay device. For this reason, it is necessary to redesign the route of the entire train after the consolidation and change the setting of each relay device mounted on each vehicle after the consolidation, every time the consolidation of the vehicles is performed. . It takes time and is prone to design errors and setting errors. In addition, since it takes time, it is necessary to secure a certain amount of time before departure after the consolidation.

  On the other hand, in the method of constructing a dynamic communication network, each relay device searches for a route for each communication, but all communicable relay devices are candidates for communication destinations. For this reason, for example, when another train operating another vehicle status monitoring system approaches, such as when the station is at a standstill, there arises a problem that communication starts between relay devices constituting each other's vehicle status monitoring system. Do. Assuming that identification information of different communication networks is given to each train and communication is not performed between different communication networks, the relay device of the vehicle newly incorporated by the addition of vehicles is the same as the conventional communication network. If it is determined that they are different, a situation may occur where communication with other relay devices can not be performed, and sensor data can not be aggregated on a train basis.

  In addition, in the method of constructing a dynamic communication network, each relay device searches for a route every communication, so the power consumption of each relay device is increased, and the operation time when operating with a battery is also shortened. is there.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technology for configuring a wireless communication system by applying a wireless sensor network to a vehicle condition monitoring system.

A first invention for solving the above-mentioned problems is
In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device (for example, the relay device 30-1 in FIG. 13) is mounted, the host device and the relay device The host device (for example, host device 20-1 in FIG. 12) of a wireless communication system (for example, communication system 1 in FIG. 1) configured to be capable of wireless communication with each other by multi-hop communication,
The host device communicates connection information (e.g., connection information 60 in FIG. 12) storing identification information of the relay device in association with the connected vehicle order of the train and communication in which the host device addresses each of the relay devices Host-to-first hop destination information (for example, host device route table 308 in FIG. 12) indicating candidate relay devices to be first hop destinations when performing the first hop destination, and each device of the host device and the relay device Storing direct communication enable / disable information (for example, the communication matrix 70 in FIG. 12) indicating whether communication can be performed in a single hop with each other;
The relay apparatus may use relay apparatus origination first hop destination information (for example, as shown in FIG. 13), which is a candidate for a first hop destination apparatus when communication is performed with the relay apparatus other than the host apparatus or the own apparatus as a destination. It stores its own device routing table 606),
Input means (Figure: "newly connected information") for inputting new said connected information (hereinafter referred to as "newly connected information") after the solutioning (increased, closed, or both, the same shall apply hereinafter) of the relay vehicle in the train 12 consolidated information acquisition units 202),
Based on a predetermined algorithm that defines a communicable range in single hop based on the relative position of each vehicle, using the new connection information, new host originating first hop destination information after new solution and new information Temporarily generating the direct communication availability information, the temporarily generated new host originating first hop destination information and the new direct communication availability information, the host originating first hop destination information and the stored information Update means for updating the stored host originating first hop destination information and the direct communication availability information to new information by performing correction with the direct communication availability information (the first communication matrix in FIG. 12 Updating unit 208 and route table updating unit 210),
A unit for generating the relay device originating first hop destination information after the resolution of each relay device based on the updated direct communication availability information, and transmitting the information to each relay device (route table transmission in FIG. 12 Control unit 212),
A host device provided with

  According to the first aspect of the invention, the communication network related to the wireless sensor network of the own train can be relatively easily made even if another train is approaching or the vehicle is being resolved. It can be built. That is, the host device and each device of the host device and the relay device are based on a predetermined algorithm that defines the communicable range in the first hop using the input new connection information of the relay vehicle after resolution. The first hop, which is a candidate for a device to be the first hop destination, when the direct communication availability information indicating whether it is possible to communicate with each other in the first hop is updated and communication is performed with the other devices as destinations. Update destination information. Also, based on the updated direct communication availability information, relay device origination first hop destination information of each relay device after resolution is generated and transmitted. Thus, the communication network can be built relatively easily and in a short time.

The second invention is
In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device (for example, the relay device 30-1 in FIG. 13) is mounted, the host device and the relay device The host device (for example, host device 20-2 in FIG. 20) of a wireless communication system configured to be capable of wireless communication with each other by multi-hop communication
The host device communicates connection information (for example, connection information 60 in FIG. 20) storing identification information of the relay device in association with the connected vehicle order of the train (for example, connection information 60 in FIG. 20) Host-to-first hop destination information (for example, host device route table 308 in FIG. 20) indicating candidates for relay devices to be first hop destinations when performing the first hop destination, each device of the host device and the relay device Storing direct communication enable / disable information (for example, the communication matrix 70 in FIG. 20) indicating whether communication can be performed in a single hop with each other;
The relay apparatus may use relay apparatus origination first hop destination information (for example, as shown in FIG. 13), which is a candidate for a first hop destination apparatus when communication is performed with the relay apparatus other than the host apparatus or the own apparatus as a destination. It stores its own device routing table 606),
Input means (for example, "newly connected information") for inputting the new connected information (hereinafter referred to as "newly connected information") after the solutioning of the relay vehicle in the train (the increase, closing, or both, the same applies hereinafter). , And the connection information acquisition unit 202 of FIG.
Based on the consolidation information before consolidation and the new consolidation information, it is regarded that the new relay vehicle after consolidation is replaced and located at the relay vehicle position before consolidation, and the replacement vehicle Using the relay device, update information corresponding to the number of overlapping vehicles between the number of vehicles before consolidation and the number of vehicles after consolidation among the host departure first hop destination information and the direct communication availability information A first update unit (for example, the second communication matrix update unit 216 and the route table update unit 210 in FIG. 20);
If the number of vehicles after augmentation exceeds the number of vehicles prior to resolution, the host based on a predetermined algorithm defining a communicable range by single hop based on the relative position of each vehicle Second update means (for example, the second communication matrix update unit in FIG. 20) that complements and updates information corresponding to the number of excess vehicles among the first hop destination information and the direct communication availability information from the new connection information 216, and the route table update unit 210),
Means for generating the relay device originating first hop destination information after the resolution of each relay device based on the updated direct communication availability information, and transmitting the information to each relay device (for example, a route shown in FIG. 20) Table transmission control unit 212),
A host device provided with

  According to the second aspect of the present invention, even when another train is approaching or the vehicle is being resolved, the communication network related to the wireless sensor network of the own train can be made relatively easy. It can be built. That is, the host device uses the consolidation information before consolidation and the input new consolidation information after consolidation, and the new vehicle after consolidation is replaced with the position of the vehicle before consolidation. The system directly assumes that the communication availability information is updated, and also updates the first hop destination information from the own apparatus. Also, based on the updated direct communication availability information, relay device origination first hop destination information of each relay device after resolution is generated and transmitted. Thus, the communication network can be built relatively easily and in a short time.

The third invention is
In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device (for example, the relay device 30-3 in FIG. 25) is mounted, the host device and the relay device The host device (for example, the host device 20-3 in FIG. 24) of a wireless communication system configured to be able to wirelessly communicate with each other by multi-hop communication,
The host device is connected to the connecting vehicle sequence of the train and stores the identification information of the relay device, and the first hop destination when the host device communicates with the relay device as the destination. Host-first hop destination information (host device routing table 308) indicating candidate relay devices, and direct communication availability indicating whether each device of the host device and the relay device can communicate with each other in a single hop Store information (eg, communication matrix 70 of FIG. 24);
The relay apparatus is a candidate for relay apparatus origination first hop destination information (for example, as shown in FIG. It stores its own device routing table 606),
Input means (for example, "newly connected information") for inputting the new connected information (hereinafter referred to as "newly connected information") after the solutioning of the relay vehicle in the train (the increase, closing, or both, the same applies hereinafter). , And the connection information acquisition unit 202 of FIG.
Based on a predetermined algorithm that defines a communicable range in single hop based on the relative position of each vehicle, using the new connection information, new host originating first hop destination information after new solution and new information Temporarily generating the direct communication availability information, the temporarily generated new host originating first hop destination information and the new direct communication availability information, the host originating first hop destination information and the stored information Update means for performing the correction with the direct communication availability information and updating the stored host-originated first hop destination information and the direct communication availability information with the new information (a first communication matrix in FIG. 24) Update unit 220, and own device route table update unit 220),
In each relay device, information (hereinafter referred to as “partial information”) (for example, individual communication confirmation information 80 in FIG. 23) related to the relay device among the updated direct communication availability information (for example, individual communication confirmation information 80 in FIG. 23) and the new connection information (for example, A unit for transmitting the connection information 60 of FIG. 23 (for example, the route table creation instructing unit 222 of FIG. 24);
A host device provided with

  According to the third aspect of the invention, even when another train is approaching, or even when the vehicle is intensified, the communication network of the wireless communication related to the wireless sensor network of the own train is compared Easy to build. That is, the host device directly updates the communication availability information based on a predetermined algorithm that defines the communicable range in the first hop, using the input newly connected information after augmentation, and Update first hop destination information. Further, among the updated direct communication availability information, partial information related to the relay device and new connection information are transmitted to each relay device. Thus, the communication network can be built relatively easily and in a short time.

The fourth invention is
In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device (for example, the relay device 30-3 in FIG. 25) is mounted, the host device and the relay device The host device (for example, host device 20-3 in FIG. 24) of a wireless communication system configured to be able to wirelessly communicate with each other by multihop communication
The host device is connected to the connecting vehicle sequence of the train and stores the identification information of the relay device, and the first hop destination when the host device communicates with the relay device as the destination. Host-to-first-hop information (for example, host device routing table 308 in FIG. 24) indicating candidate relay devices, and whether each device of the host device and the relay device can communicate with each other in single hop Storing direct communication availability information (for example, the communication matrix 70 in FIG. 24) indicating
The relay apparatus is a candidate for relay apparatus origination first hop destination information (for example, as shown in FIG. It stores its own device routing table 606),
Input means (for example, "newly connected information") for inputting the new connected information (hereinafter referred to as "newly connected information") after the solutioning of the relay vehicle in the train (the increase, closing, or both, the same applies hereinafter). , And the connection information acquisition unit 202 of FIG.
Based on the consolidation information before consolidation and the new consolidation information, it is regarded that the new relay vehicle after consolidation is replaced and located at the relay vehicle position before consolidation, and the replacement vehicle Using the relay device, update information corresponding to the number of overlapping vehicles between the number of vehicles before consolidation and the number of vehicles after consolidation among the host departure first hop destination information and the direct communication availability information A first update unit (for example, the second communication matrix update unit 210 of FIG. 20, and the own apparatus route table update unit 220);
If the number of vehicles after augmentation exceeds the number of vehicles prior to resolution, the host based on a predetermined algorithm defining a communicable range by single hop based on the relative position of each vehicle Second update means (for example, the second communication matrix update unit in FIG. 20) that complements and updates information corresponding to the number of excess vehicles among the first hop destination information and the direct communication availability information from the new connection information 210, and own device route table update unit 220),
Means for transmitting information (hereinafter referred to as “partial information”) of the updated direct communication enable / disable information to the respective relay device (for example, route table creation event section in FIG. 24) 222) and
A host device provided with

  According to the fourth aspect of the invention, even when another train is approaching, or even when the vehicle is intensified, the communication network of the wireless communication related to the wireless sensor network of the own train is compared Easy to build. That is, the host device uses the consolidation information before consolidation and the input new consolidation information after consolidation, and the new vehicle after consolidation is replaced with the position of the vehicle before consolidation. The system directly assumes that the communication availability information is updated, and also updates the first hop destination information from the own apparatus. Further, among the updated direct communication availability information, partial information related to the relay device and new connection information are transmitted to each relay device. Thus, the communication network can be built relatively easily and in a short time.

As a fifth invention,
The relay apparatus (for example, the relay apparatus 30-1 in FIG. 13) that configures the wireless communication system by wireless communication with the host apparatus of the first or second invention,
A unit (for example, the storage unit 600-1 in FIG. 13) for storing and updating the relay device originating first hop destination information (for example, the own apparatus route table 606 in FIG. 13) received from the host device;
The relay apparatus may be configured with

  According to the fifth aspect, the relay device stores and updates the relay device origination first hop destination information transmitted from the host device. As a result, the relay device can be updated without creating the relay device origination first hop destination information in the current formation by itself, and when another train is approaching, or when the vehicle's solution is resolved. Even in this case, it is possible to construct a communication network related to the wireless sensor network of its own train relatively easily.

As a sixth invention,
A relay device (for example, the relay device 30-3 in FIG. 25) that configures the wireless communication system by wireless communication with a third or fourth host device,
Means for storing and updating relay device originating first hop destination information (for example, own device routing table 606 in FIG. 25) after resolution based on the partial information and the new connection information received from the host device For example, the own device route table creation unit 508 of FIG.
The relay apparatus may be configured with

  According to the sixth aspect of the invention, the relay device stores the relay device origination first hop destination information after the resolution based on the partial information of the direct communication availability information received from the host device and the new connection information. Update. Thereby, the relay device can update the relay device origination first hop destination information in the current formation without trying wireless communication, and when another train is approaching or when the vehicle is intensified. Even in the case where the above is performed, it is possible to construct a communication network related to the wireless sensor network of its own train relatively easily.

An application example of a radio communication system to a vehicle state monitoring system. An example of a route table. An example of augmentation. An example of consolidation information. Explanatory drawing of confirmation of the propriety of direct communication with each relay apparatus by a host apparatus. Explanatory drawing of confirmation of the decision | availability of direct communication between relay apparatuses. Example of communication matrix. Explanatory drawing of transmission of the routing table | surface from a host apparatus to each relay apparatus. An example of augmentation. An example of judgment of the propriety of direct communication between devices based on the basic performance of wireless communication. Explanatory drawing of correction | amendment of the communication matrix based on the communication matrix before augmentation. FIG. 2 is a functional configuration diagram of a host device in the first embodiment. FIG. 2 is a functional configuration diagram of a relay device in the first embodiment. 6 is a flowchart of communication network construction processing in the first embodiment. An example of augmentation that the number of formation vehicles decreases. Explanatory drawing of correction | amendment of the communication matrix based on the communication matrix before augmentation. An example of augmentation that the number of formation vehicles increases. Explanatory drawing of correction | amendment of the communication matrix based on the communication matrix before augmentation. Explanatory drawing of judgment of the decision | availability of the direct communication between the apparatuses which exceed after reinforcement. FIG. 7 is a functional configuration diagram of a host device in a second embodiment. The flowchart of the construction | assembly process of the communication network in 2nd Example. Explanatory drawing of the preparation instruction | indication of the routing table with respect to the relay apparatus at the time of network construction. Explanatory drawing of the preparation instruction | indication of the routing table with respect to the relay apparatus at the time of network reconstruction. FIG. 14 is a functional block diagram of a host device in a third embodiment. FIG. 14 is a functional configuration diagram of a relay device in a third embodiment. The flowchart of the construction | assembly process of the communication network in 3rd Example.

[Overview]
The wireless communication system according to the present embodiment is an application of the present invention to a vehicle condition monitoring system that collects sensor data by sensors attached to each vehicle in units of trains in a railway train composed of a plurality of vehicles.

  FIG. 1 is an application example of the wireless communication system 1 to a vehicle condition monitoring system. The wireless communication system 1 is configured to include a host device 20 and a relay device 30. In this embodiment, in order to simplify the description, as shown in FIG. 1, it is assumed that the host device 20 is mounted on the leading vehicle 12 of the train and the relay device 30 is mounted on each vehicle 10 after the second car. Do. The host device 20 and the relay device 30 have a wireless communication function, and wireless communication between the devices is possible. The host device 20 or the relay device 30 can communicate wirelessly or by wire with each sensor 40 attached to the vehicle, and sensor data from each sensor 40 can be transmitted via the relay device 30. The host device 20 is aggregated.

  Communication in the wireless communication system 1 is realized by multi-hop communication, and is a dynamic communication network which searches for a route to a destination (destination) device for each communication. However, the route search is performed according to the route table 50. Each of the host device 20 and the relay device 30 stores a routing table 50. FIG. 2 is an example of the route table 50. FIG. 2 shows the routing table 50 (host-origin-first-hop destination information) of the host apparatus 20 and the routing table 50 (relay-apparatus-first hop destination information) of the relay apparatus 30. The routing table 50 stores candidates of devices to be first hop destinations in the order of priority, and stores them in each of the other devices to be destinations. The route search is selected from among the first hop destinations according to the priority order. Communication of the entire system is performed by setting the first hop destination by setting the priority so that the number of hops to the destination device decreases, instead of setting the first hop destination indiscriminately even in the case of multi-hop communication. Reduce the amount. For this reason, the first hop destinations are listed in order of increasing priority in order of proximity to the destination device.

  In railways, for example, in the middle of a station, there may be an increase and / or decrease in vehicles. In addition, since the vehicle in which the cab was normally equipped becomes a leading vehicle, in this embodiment, the host device 20 is mounted on the leading vehicle, and the vehicles after the second car are increased. That is, it is the relay vehicle on which the relay device 30 is mounted that the leading vehicle is the host vehicle and the solution is enhanced.

  FIG. 3 is an example of the solution of the vehicle. In FIG. 3 (a), the train which is a five-car train before the consolidation is disintegrated, and the fourth vehicle 10c is coalesced, and the train after the consolidation is a four-car train. Further, in FIG. 3 (b), the train which was a five-car train before augmentation is disintegrated as the fourth vehicle 10c is deducted and the vehicles 10e and 10f are additionally consolidated, and after the consolidation, six cars are formed. It is organized.

  In the vehicle condition monitoring system, in order to collect sensor data in units of trains, it is necessary to construct one communication network for one train. That is, one communication network is built up by host device 20 and relay device 30 which are carried in each car which constitutes the train concerned to one train. Therefore, when the solution consolidation is performed, it is necessary to reconstruct a new communication network since the vehicles 10 constituting one train are replaced. To construct a communication network means to create and set the routing table 50 of each of the host device 20 and the relay device 30 in the present embodiment, that is, to create and set the first hop destination of each device. Hereinafter, three embodiments of a method of constructing a communication network in the wireless communication system 1 will be described.

[First embodiment]
In the first embodiment, the host device 20 creates a routing table 50 of each device to construct a communication network.

(A) Construction of First Communication Network First, construction of a first communication network immediately after train formation will be described. In constructing the communication network, the host device 20 is provided with connection information 60 which is information of each of the vehicles 10 constituting the train. Since the vehicles to be organized are predetermined, the connection information 60 is given to the host device 20 in advance. FIG. 4 is an example of the connection information 60. As shown in FIG. 4, the connection information 60 is associated with the connection order of each vehicle 10 constituting a train, and a vehicle ID which is identification information of each vehicle 10 and a host device 20 mounted on the vehicle 10 And, it is the identification information of the relay device 30, and stores the device ID which also serves as the communication address. That is, the host device 20 can grasp the connection order of each vehicle 10 of the own train and the relay device 30 mounted on each vehicle 10 by the connection information 60.

  In the construction of the communication network, first, the host device 20 refers to the connection information 60 to determine the relay device 30 which is the target of establishing the communication network and the connection order thereof. Next, as shown in FIG. 5, the host device 20 attempts direct communication (first hop communication) with each of these relay devices 30, and checks whether direct communication with the relay device 30 is possible or not. Do. Further, as shown in FIG. 6, each relay device 30 receives a confirmation request for direct communication from another device in the uplink direction including the host device 20, and similarly, with each other relay device 30 in the downlink direction. Whether the direct communication is possible or not is confirmed, and the confirmation result is notified to the host device 20. Here, the downward direction is the direction from the leading vehicle 12 to the trailing vehicle, and conversely, the direction from the trailing vehicle to the leading vehicle 12 is referred to as the upward direction. Thus, the host device 20 can check whether direct communication between the relay devices 30 is possible.

  The confirmation result of the possibility of direct communication between the devices is collected as a communication matrix 70. FIG. 7 is an example of the communication matrix 70. According to FIG. 7, the communication matrix 70 enables single hop communication (direct communication) between each device of the host device 20 and the relay device 30. The direct communication availability information indicating the vertical direction is the transmission source device in the order of connection, and the horizontal direction is the transmission destination device in the connection order, and the availability of direct communication between the devices is stored. However, in the present embodiment, from the symmetry of communication transmission and reception, if direct communication in one direction between devices is possible, it is considered that direct communication in the reverse direction is also possible. Therefore, the communication matrix 70 stores only the propriety of direct communication with each other device in the downlink direction as the transmission destination.

  The host device 20 creates the routing table 50 of its own device and the routing table 50 of each relay device 30 based on the communication matrix 70. The routing table 50 of a certain device (referred to as “target device”) is created as follows. That is, among the other devices that can be the destinations viewed from the target device, for the device capable of direct communication, the destination device and the other devices connected between the target device and the destination device are the destinations. The first hop is in order of proximity to the device. Also, for devices that can not communicate directly, it is another device connected between the target device and the destination device, and devices that can directly communicate with the target device are ordered in the order of proximity to the destination device. One hop ahead.

  Then, as shown in FIG. 8, the host device 20 transmits, to the relay device 30, the routing table 50 created for each relay device 30. The relay device 30 stores the routing table 50 received from the host device 20. This completes the construction of the first communication network.

(B) Restructuring of Communication Network after Increasing Resolution Next, the re-establishment of the communication network accompanying the increasing resolution will be described. The case where the vehicle consolidation as shown in FIG. 9 is performed will be described as an example. In FIG. 9, a seven-car train is formed by disengaging the car 10 c and increasing the cars 10 f and 10 g with respect to a six-car train in which five cars 10 a to 10 e are connected to the leading car 12. Has been changed to. That is, before and after the reinforcement, the vehicles 10c to 10e for the fourth and subsequent eyes are replaced with the vehicles 10d to 10g although the same for the third and fourth eyes.

  Before the solution, the communication network is constructed by the host device 20 mounted on the lead vehicle 12 and the relay devices 30a to 30e mounted on the vehicles 10a to 10e, respectively. With respect to the communication network before the resolution, after the resolution, the relay device 30c mounted on the dismounted vehicle 10c is excluded, and the relay device 30f mounted on each of the additional vehicles 10f and 10g , 30g need to be built communication network. That is, after the resolution, it is necessary to reconstruct the communication network by the host device 20 and the relay devices 30a, 30b, 30d to 30g.

  When rebuilding the communication network, it is assumed that the host device 20 has acquired connection information 60 (new connection information) about the formation after the solution resolution. Since the information on the vehicle to be resolved is determined in advance, the connection information 60 (new connection information) related to the solution is given to the host device 20. The host device 20 refers to the newly connected information, determines whether or not direct communication between the devices is possible, and generates a temporary communication matrix based on a predetermined algorithm for the train after the solution completion. The predetermined algorithm is a method of determining the possibility of direct communication between each device based on the basic performance of wireless communication of each device. The basic performance of wireless communication includes at least the distance over which wireless communication is possible. Further, in the present embodiment, it is assumed that the wireless communication possible distances for all devices (host device 20 and relay device 30) are the same. Further, the vehicle lengths of the respective vehicles 10 are all set to the same predetermined length, or the longest vehicle length that can be augmented is set to a predetermined length. Based on these, the host device 20 determines, for example, “direct communication can be made to two devices ahead” for each device according to a predetermined algorithm.

  FIG. 10 is an example of the determination result of the direct communication. In FIG. 10, a line with an arrow indicates a case where the range in which direct communication based on the basic performance of wireless communication of each device is possible is “to two devices ahead”.

  Then, the generated temporary communication matrix is corrected based on the communication matrix before augmentation to update the communication matrix. FIG. 11 is an example of communication matrix correction based on the communication matrix before augmentation. Before and after the consolidation, even if the vehicle order from the top is the same, it may be replaced by a different vehicle, or the same vehicle may be located in a different vehicle order. Therefore, the communication matrix is corrected paying attention to the connection order of which eye. That is, each device in the train after augmentation is applied by applying between the same connection order in the train after augmentation, whether communication between devices determined by the communication matrix 70 for the train before resolution is established Correct the wireless communication between them.

  As shown in the lower part of FIG. 11, since direct communication between the host device 20 which is the first eye and the relay device 30 c which is the fourth eye is possible before the resolution, as shown in the upper part of the same figure. In addition, even after the solution is solved, the communication matrix is corrected considering that direct communication between the first host computer 20 and the fourth relay device 30d is possible. Further, as shown in the lower part of the figure, since direct communication between the relay device 30a which is the second car and the relay device 30c which is the fourth car is not possible before the resolution, the upper part of the figure is shown. As described above, even after the solution is solved, the communication matrix is corrected by regarding direct communication between the second relay device 30a and the fourth relay device 30d as impossible.

  Thereafter, the host device 20 recreates the routing table 50 of the own device (host device 20) and each relay device 30 according to the communication matrix 70 after the update. Then, the host device 20 transmits the route table 50 created for each relay device 30 to the corresponding relay device 30. The relay device 30 updates and stores the route table received from the host device 20. This completes the construction of the communication network after the solution. The same communication network is rebuilt each time an augmentation takes place.

<Functional configuration>
FIG. 12 is a functional block diagram of the host device 20-1 in the first embodiment. According to FIG. 12, the host device 20-1 stores the operation unit 102, the display unit 104, the sound output unit 106, the wireless communication unit 108, the sensor data input unit 110, the processing unit 200-1, and storage. This is a type of computer configured to include the unit 300-1.

The operation unit 102 is an input device realized by an input device such as a touch panel or various switches, and outputs an operation signal according to the operation input of the administrator to the processing unit 200-1.
The display unit 104 is a display device realized by, for example, an LCD (Liquid Crystal Display) or the like, and performs various displays according to the display signal from the processing unit 200-1.
The sound output unit 106 is an audio output device realized by, for example, a speaker, and performs various sound outputs in accordance with the audio signal from the processing unit 200-1.

The wireless communication unit 108 is a wireless communication device realized by a wireless communication module or the like for performing wireless communication with the relay device 30 by multi-hop communication.
The communication unit 109 performs wireless communication with an external device serving as a transmission destination of the integrated sensor data group 314 and an external device installed at a first departure station serving as an acquisition destination of the connection information 60 or a station where vehicles are added. It is a wireless communication device.

  The sensor data input unit 110 is a wireless communication device or a wired communication device, and inputs sensor data from a sensor attached to a vehicle on which the host device 20-1 is mounted. The sensor data input by the sensor data input unit 110 is accumulated and stored as an aggregate sensor data group 314 together with the vehicle sensor data group 608 received from the relay device 30 as a sensor data group of the host vehicle.

  The processing unit 200-1 is an arithmetic device realized by, for example, a CPU, an ASIC, an FPGA, etc., and an instruction to each unit configuring the host device 20 based on a program or data stored in the storage unit 300-1. Data transfer is performed to control the entire host device 20. In addition, when the processing unit 200-1 is classified as a functional configuration, the connection information acquisition unit 202, the communication matrix generation unit 204, the route table creation unit 206, the first communication matrix update unit 208, and the route table update. And a routing table transmission control unit 212 and a data aggregation unit 214. These functional units may be realized as software by the processing unit 200-1 executing a program, or may be realized by a dedicated processor or circuit. This embodiment will be described as the former.

  The connection information acquisition unit 202 acquires connection information 60 input from an external device via the wireless communication unit 108. The acquired connection information 60 is stored and stored as a connection information DB 306 in association with, for example, the acquisition date and time.

  The communication matrix generation unit 204 generates a communication matrix for its own train when constructing the first communication network immediately after the formation. That is, with reference to the latest connection information 60 acquired by the connection information acquisition unit 202, the relay device 30 included in the own train and the connection order thereof are grasped, and direct communication with each relay device 30 of the own train is attempted. Check whether direct communication is possible. Further, at the time of confirming whether or not direct communication with each relay device 30 is possible, the connection information 60 is transmitted to each relay device 30 to request confirmation of whether or not direct communication with each other relay device 30 is possible. Do. Then, the communication matrix 70 is generated by combining the confirmation result of the direct communication between the host device 20 and each relay device 30 and the confirmation result of the direct communication between the relay devices 30 received from each relay device 30. Do. The generated communication matrix 70 is accumulated and stored in the communication matrix DB 304, for example, in association with the identification number of the corresponding connection information 60.

  The route table creation unit 206 is a route of the host device 20 and each relay device 30 based on the communication matrix 70 generated by the communication matrix generation unit 204 at the time of construction of the first communication network immediately after train formation as the first train. Create a table The generated route table 50 of the host device 20 is updated and stored as the host device route table 308, and the route table of each relay device 30 is associated with the corresponding relay device 30 identification number, and the relay device route table 310 It is updated and stored as

  The first communication matrix updating unit 208 generates a communication matrix 70 for the own train after the augmentation when the communication network is reconstructed by the augmentation of the vehicle 10. That is, referring to the latest connection information 60 acquired by the connection information acquisition unit 202, the relay device 30 included in the own train and the connection order thereof are grasped. Then, based on the basic performance of the wireless communication of each device, it is determined whether or not direct communication between each device (host device 20 and each relay device 30) of the own train is possible, and a temporary communication matrix is generated. Next, the communication availability between devices determined by the communication matrix 70 for the own train before the solution solving is applied between the same connection order in the own train after the solution solving, and the own train after the solution solving The temporary communication matrix is corrected to generate a communication matrix by changing the availability of wireless communication between the devices in.

  Here, the basic performance of the wireless communication includes the distance in which the wireless communication is possible, is common to all the devices, and is stored as the wireless communication performance information 312. Also, the generated communication matrix 70 is accumulated and stored as the communication matrix DB 304 in association with, for example, the identification number of the corresponding connection information 60.

  At the time of restructuring of the communication network by the solution solving of the vehicle 10, the route table updating unit 210 follows the communication matrix 70 generated by the first communication matrix updating unit 208, and the host device 20 and each in the own train after solution solving. The routing table 50 of the relay device 30 is created. The generated route table 50 of the host device 20 is updated and stored as the host device route table 308, and the route table 50 of each relay device 30 is associated with the corresponding relay device 30 with the identification number of the corresponding relay device 30, It is updated and stored as 310.

  The route table transmission control unit 212 transmits the route table 50 of each relay device 30 created by the route table creation unit 206 to the relay device 30 at the time of construction of the first communication network immediately after the formation of the first train. Take control. Further, at the time of reconstruction of the communication network by the solution of the vehicle 10, control is performed to transmit the route table 50 of each relay device 30 created by the route table update unit 210 to the relay device 30.

  The data aggregation unit 214 accumulates and stores sensor data (vehicle sensor data group 608 (see FIG. 13)) transmitted from each relay device 30 as the aggregation sensor data group 314, thereby aggregating sensor data related to the own train. Do. In addition, sensor data of the vehicle in which the host device 20 is mounted is also collected together. Then, the aggregation sensor data group 314 is transmitted to the external device via the wireless communication unit 108 at a predetermined external transmission timing. The external transmission timing can be, for example, the timing at which a predetermined station has arrived, and in that case, the data aggregation unit 214 directs the communication device (external device) installed at the station to an aggregated sensor data group Send 314

  The storage unit 300-1 is a storage device realized by, for example, a hard disk, a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and the processing unit 200-1 integrally controls the host device 20. A system program, a program for realizing various functions, data and the like are stored, and used as a work area of the processing unit 200-1, and calculation results etc. executed by the processing unit 200-1 according to the various programs are temporary. Stored. The storage unit 300-1 includes a first host control program 302, a connection information DB 306, a communication matrix DB 304, a host device path table 308, a relay device path table 310, wireless communication performance information 312, and aggregation. A sensor data group 314 is stored.

  FIG. 13 is a functional block diagram of the relay device 30-1 in the first embodiment. According to FIG. 13, the relay device 30-1 stores the operation unit 402, the display unit 404, the sound output unit 406, the wireless communication unit 408, the sensor data input unit 410, the processing unit 500-1, and storage. This is a type of computer configured to include the unit 600-1.

  The operation unit 402 is an input device realized by an input device such as a touch panel or various switches, and outputs an operation signal according to the operation input of the administrator to the processing unit 500-1. The display unit 404 is a display device realized by, for example, an LCD or the like, and performs various displays according to the display signal from the processing unit 500-1. The sound output unit 406 is an audio output device realized by, for example, a speaker, and performs various sound outputs in accordance with the audio signal from the processing unit 500-1. The wireless communication unit 408 is a device implemented by a wireless communication module or the like that performs wireless communication by multi-hop communication, and performs wireless communication with the host device 20 and other relay devices 30. The sensor data input unit 410 is a wireless communication device or a wired communication device, and inputs sensor data from a sensor attached to the vehicle 10 on which the relay device 30 is mounted. The sensor data input by the sensor data input unit 410 is accumulated and stored as a vehicle sensor data group 608.

  The processing unit 500-1 is an arithmetic device realized by, for example, a CPU, an ASIC, or an FPGA, and an instruction or data to each unit configuring the relay device 30 based on a program or data stored in the storage unit 600-1. The transfer is performed, and the entire control of the relay device 30 is performed. The processing unit 500-1 also includes a communication status confirmation unit 502, a route table acquisition unit 504, and a data transmission control unit 506 when the processing unit 500-1 is classified as a functional configuration. These functional units may be realized as software by the processing unit 500-1 executing a program, or may be realized by a dedicated processor or circuit. This embodiment will be described as the former.

  The communication status check unit 502 checks whether or not direct communication with another device can be made in response to a request from another device other than the host device 20 or another relay device 30 or the like. That is, referring to the connection information 60 received together with the confirmation request, the other relay devices 30 connected in the downstream direction of the own device are determined, and direct communication is attempted to each of these other relay devices 30. , Confirm the possibility of direct communication, and transmit the confirmation result to the host device 20. Further, at this time, the connection information 60 is transmitted together to each of the other relay apparatuses 30 in the downlink direction to request confirmation as to whether or not direct communication is possible.

  The routing table acquisition unit 504 acquires the routing table 50 received from the host device 20, and updates and stores it as the local device routing table 606.

  The data transmission control unit 506 performs control to transmit the vehicle sensor data group 608 to the host device 20 at a predetermined cycle. Specifically, the data transmission control unit 506 transmits the vehicle sensor data group 608 to the host device 20 as a destination by multihop communication using the own device route table 606.

  The storage unit 600-1 is a storage device realized by, for example, a hard disk, a ROM, a RAM, and the like, and a system program for the processing unit 500-1 to integrally control the relay device 30, and various functions. The program, data, and the like are stored and used as a work area for the processing unit 500-1, and the calculation results and the like that the processing unit 500-1 executes according to various programs are temporarily stored. The storage unit 600-1 stores a first relay control program 602, connection information 604, an own apparatus route table 606, and a vehicle sensor data group 608.

<Flow of processing>
FIG. 14 is a flow chart for explaining the flow of communication network construction processing in the first embodiment. In FIG. 14, the processing on the left side of the host device 20 is shown, and the processing on the relay device 30 is shown on the right side. This process is realized by the processing unit 200-1 of the host device 20-1 executing the first host control program 302, and the processing unit 500-1 of the relay device 30-1 executing the first relay control program 602. The first process when the train is organized and starts operation, and the second process, which is performed each time the solution is completed. It is divided.

  The “first-time” processing is processing of steps A1 to A11 of the host device 20 and steps B1 to B5 of the relay device 30. First, in the first process, when the connection information acquisition unit 202 of the host device 20 acquires the connection information 60 (step A1), construction of the first communication network is started. That is, the communication matrix generation unit 204 determines the relay device 30 configuring the own train with reference to the acquired connection information 60, and confirms whether or not direct communication with each determined relay device 30 is possible, and each relay device The connection information 60 is sent to 30 to request confirmation of direct communication with each device in the downstream direction (step A3). Then, in the relay device 30, in response to the direct communication confirmation request from the host device 20, the communication status check unit 502 refers to the connection information 60 received together to judge the relay device 30 in the down direction, Whether or not direct communication with each relay device 30 is possible is confirmed (step B1), and the confirmation result is transmitted to the host device 20 (step B3). Then, in the host device 20, the communication matrix generation unit 204 generates the communication matrix 70 from the confirmation result of the direct communication with each relay device 30 and the confirmation result of the direct communication between the relay devices 30 received from each relay device 30. Are generated (step A5).

  Next, the routing table creation unit 206 creates the routing table 50 of the host device 20 according to the generated communication matrix 70 (step A7). Further, the routing table creation unit 206 creates the routing table 50 of each relay device 30 according to the generated communication matrix 70 (step A9), and the routing table transmission control unit 212 generates the route of each relay device 30. The table 50 is transmitted to the corresponding relay device 30 (step A11). Then, in the relay device 30, the route table acquisition unit 504 updates and stores the route table received from the host device 20 (step B5).

  This completes the construction of the first communication network. Thereafter, train operation is started. When the operation is started, each relay device 30 accumulates sensor data of a vehicle (relay vehicle) on which the relay device 30 is mounted as a vehicle sensor data group 608, and the accumulated vehicle sensor data group 608, And performing multi-hop communication for the host device 20 in a predetermined cycle based on the own device path table 606. In the host device 20, the vehicle sensor data group 608 sent from each relay device 30 and the sensor data group of the vehicle (host vehicle) on which the host device 20 is mounted are collected and stored as a collection sensor data group 314. , Transmit to the external device at a predetermined timing.

  After that, each time the solution consolidation of the vehicle is carried out, the construction of the communication network of “solution-by-consolidation” is executed. The processing “every increase” is processing of steps A12 to A23 of the host device 20 and step B7 of the relay device 30.

  First, it is judged that the implementation of the solution is performed by the instruction operation from the driver's cab and the new connection information 60 being input (step A12). In the case of consolidation (step A12: YES), when the consolidation information acquisition unit 202 of the host device 20 acquires consolidation information 60 (new consolidation information) about the formation after consolidation (step A13), the communication network Start rebuilding. That is, the first communication matrix updating unit 208 refers to the acquired connection information 60, determines whether or not direct communication between devices in formation after augmentation is possible based on the basic performance of wireless communication, A communication matrix is generated (step A15). Next, based on the previous communication matrix 70, the temporary communication matrix is updated by correcting the possibility of direct communication between the devices (step A17).

  Subsequently, the routing table updating unit 210 creates, updates and stores the routing table 50 of the host device 20 according to the communication matrix 70 after the updating (step A19). Also, the routing table update unit 210 creates the routing table 50 of each relay device 30 (step A21), and the routing table transmission control unit 212 corresponds to the generated routing table 50 of each relay device 30 as a relay device. It transmits to 30 (step A23). Then, in the relay device 30, the route table acquisition unit 504 updates and stores the route table 50 received from the host device 20 (step B7).

  This completes the construction of the communication network at the time of solution. Thereafter, the operation of the train is started with the new train formation, but the processing such as aggregation of sensor data after the start of operation is the same as that after the start of operation by the first train.

Second Embodiment
Next, a second embodiment will be described. The second embodiment differs from the first embodiment in the method of updating the communication matrix after augmentation of the vehicle. The same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment, the communication matrix is updated by applying the propriety of direct communication between each device determined by the communication matrix before augmentation, between the devices of the same connection order in the formation after augmentation. . That is, it is considered that the new vehicle 10 after the augmentation is replaced at the position of the vehicle 10 before the augmentation. And about the device of the position which overlaps before and after the consolidation, the possibility of direct communication between each device before the consolidation is applied as it is between the devices of the overlapping position after the consolidation, With respect to a vehicle at a position that does not overlap later, based on a predetermined algorithm based on the basic performance of wireless communication, it is determined whether or not direct communication with another device is possible to generate a communication matrix.

  This will be described specifically. FIG. 15 shows an example in which the number of forming vehicles is reduced by the increase in solution. In FIG. 15, the train which was a five-car train before the solution consolidation is disconnected from the fourth vehicle 10 c, and the train is a four-car train after the solution consolidation. That is, four vehicles overlap as the number of vehicles before and after the solution consolidation, and the fourth vehicle 10c of the overlapping vehicles 10 is replaced with the vehicle 10d.

  In this case, as shown in FIG. 16, in the communication matrix 70 before augmentation, whether or not direct communication can be established between the respective units from the 1st to the 4th, which are four vehicles overlapping before and after the augmentation. Is directly taken over as the possibility of direct communication between each device from the first to fourth eyes after the solution. At the same time, for the four cars replaced before and after the consolidation, the relay device 30c mounted on the vehicle 10c, which is the fourth car before consolidation, is mounted on the fourth vehicle 10d swapped after consolidation. The communication matrix 70 is corrected by replacing it with the relay device 30d. Further, in the communication matrix 70, the items for the five eyes that have decreased after augmentation are deleted.

  FIG. 17 shows an example in which the number of train formation vehicles is increased by the solution process. In FIG. 17, the trains that were the four-car train before the consolidation are the cars 10 d and 10 e are connected, and the train is the six-car train after the consolidation. That is, before and after augmentation, four vehicles overlap as the number of vehicles, and the fifth to sixth vehicles exceed the number of overlapping vehicles and are connected.

  In this case, as shown in FIG. 18, in the communication matrix 70 before augmentation, whether or not direct communication can be established between the respective units from the 1st to the 4th, which are four vehicles overlapping before and after the augmentation. Is directly taken over as the possibility of direct communication between each device from the first to fourth eyes after the solution. Further, as shown in FIG. 19, the relay devices 30d and 30e mounted on the vehicles 10d and 10e which are the 5th and 6th eyes exceeding the number of overlapping vehicles, respectively, have the radios described in the first embodiment. Based on a predetermined algorithm based on the basic performance of communication, it is determined whether or not direct communication with each other device is possible. That is, based on an algorithm that direct communication is possible for up to two vehicles, it is determined whether or not direct communication is possible. In FIG. 19, among the direct communication in the downlink direction, the direct communication in which the transmission destination or the transmission source is the relay apparatuses 30 d and 30 e is indicated by arrow lines.

<Functional configuration>
FIG. 20 is a functional block diagram of the host device 20-2 in the second embodiment. According to FIG. 20, in the host device 20-2, when the processing unit 200-2 is classified as the functional configuration, the connection information acquisition unit 202, the communication matrix generation unit 204, the route table creation unit 206, A second communication matrix updating unit 216, a routing table updating unit 210, a routing table transmission control unit 212, and a data aggregation unit 214 are included.

  The second communication matrix updating unit 216 generates a communication matrix 70 for the own train after the augmentation when the communication network is reconstructed by the augmentation of the vehicle 10. That is, referring to the latest connection information 60 acquired by the connection information acquisition unit 202, the relay device 30 included in the own train and the connection order thereof are grasped. And about the device of the position which overlaps before and after the consolidation, the possibility of direct communication between each device before the consolidation is applied as it is between the devices of the overlapping position after the consolidation, With respect to a vehicle at a position that does not overlap later, based on a predetermined algorithm based on the basic performance of wireless communication, it is determined whether or not direct communication with another device is possible to generate a communication matrix. The generated communication matrix 70 is accumulated and stored as the communication matrix DB 304, for example, in association with the identification number of the corresponding connection information 60.

  The relay device 30 has the same functional configuration as that of the first embodiment.

<Flow of processing>
FIG. 21 is a flow chart for explaining the flow of communication network construction processing in the second embodiment. In FIG. 21, the processing on the left side of the host device 20 is shown, and the processing on the relay device 30 is shown on the right side. In this process, the processing unit 200-2 of the host device 20-2 executes the first host control program 316, and the relay device 30-1 executes the first relay control program 602 as in the first embodiment. Is a process realized by Also, as in the first embodiment, the "first-time" process when the train is organized and starts operation, and the "every-consulting process" process that is executed every time after the consolidating process is performed, and Divided into two.

  The “first-time” process is the process of steps A1 to A11 of the host device 20 and the process of steps B1 to B5 of the relay device 30, and is the same as that of the first embodiment.

  After that, each time the solution consolidation of the vehicle 10 is performed, the construction of the communication network of each solution consolidation is performed. The processing “every increase” is processing of steps A12 to A27 of the host device 20 and step B7 of the relay device 30. The processing of the relay device 30 is the same as that of the first embodiment.

  First, it is determined that the implementation of the consolidation is performed (Step A12). If the consolidation is performed (Step A12: YES), the consolidation information acquisition unit 202 of the host device 20 selects the consolidation information 60 about the formation after consolidation. Once acquired (step A13), reconstruction of the communication network is started. In other words, the second communication matrix updating unit 216 refers to the acquired connection information 60, and the devices mounted on the vehicle 10 that overlap before and after the consolidation process are directly communicated between the systems before the consolidation process. The communication matrix 70 is generated by inheriting the availability (step A25). Moreover, about the apparatus mounted in the vehicle 10 which exceeds after reinforcement, it is added and updated to a communication matrix, judging the possibility of direct communication with each other apparatus based on the basic performance of wireless communication. Step A27).

  Subsequently, the routing table updating unit 210 creates, updates and stores the routing table 50 of the host device 20 according to the communication matrix 70 after the updating (step A19). Also, the routing table update unit 210 creates the routing table 50 of each relay device 30 (step A21), and the routing table transmission control unit 212 corresponds to the generated routing table 50 of each relay device 30 as a relay device. It transmits to 30 (step A23). Then, in the relay device 30, the route table acquisition unit 504 updates and stores the route table 50 received from the host device 20 (step A25).

  This completes the construction of the communication network at the time of solution formation. Thereafter, the operation of the train is started with the new train formation, but the processing such as aggregation of sensor data after the start of operation is the same as that after the start of operation by the first train.

Third Embodiment
Next, a third embodiment will be described. The third embodiment differs from the first and second embodiments in that the routing table 50 of the relay device 30 is created by the relay device 30 itself. The same members of the present embodiment as those of the first and second embodiments described above are designated by the same reference numerals and their detailed description will be omitted.

(A) Construction of First Communication Network First, construction of the first communication network immediately after train formation will be described. The host apparatus 20 confirms the possibility of direct communication with each relay apparatus 30 in the own train, as in the first embodiment (see FIG. 5). As a result, in the communication matrix 70, values are stored only for one row whose source is the host device 20.

  Next, as shown in FIG. 22, the host device 20 transmits the connection information 60 and the individual communicatable information 80 to the relay device 30, and causes the routing table 50 to be created. The individual communicatable information 80 is information of an apparatus which can be directly communicated with the relay device 30 determined from the communication matrix 70, and can be said to be a part of the communication matrix 70. The creation instruction of the route table 50 is sequentially targeted from the relay device 30 closer to the host device 20. Further, as to the propriety of direct communication between the relay devices 30 in the communication matrix 70, a value is stored based on the confirmation result received from the relay device 30, as described later. For this reason, the individual communicatable information 80 is information as to whether or not direct communication with each device in the uplink direction can be made from the viewpoint of the target relay device 30.

  Specifically, the host device 20 first transmits the connection information 60 and the individual communicable information 80 indicating the host device 20 to the relay device 30a for the second relay device 30a. The relay device 30a refers to the received connection information 60 and determines that the other relay devices 30 connected in the downstream direction from the own device are the relay devices 30b to 30e, and these relay devices 30b to 30e Attempt to communicate directly with each other to confirm the availability of direct communication. Then, the relay device 30a creates the routing table 50 of its own device based on the confirmation result of the direct communication and the individual communicatable information 80 received from the host device 20. That is, the first hop destination to which each device in the uplink direction is the destination viewed from the own device is determined based on the individual communicatable information 80 received from the host device 20, and the first hop to each device in the downlink direction is the destination. The destination is determined based on the possibility of direct communication confirmed by the own device.

  Also, the relay device 30a transmits, to the host device 20, the confirmation result of whether or not direct communication with each relay device 30 in the downlink direction is possible. The host device 20 updates one line in which the relay device 30a is the transmission source in the communication matrix 70 based on the confirmation result of the direct communication received from the relay device 30a. The same applies to the relay device 30 for the third and subsequent eyes.

(B) Restructuring of Communication Network after Increasing Resolution Next, the time of reconfiguring the communication network accompanying the increasing resolution will be described. The host device 20 updates the communication matrix 70 for the formation after augmentation according to the method of the first embodiment or the second embodiment described above. Then, according to the communication matrix 70 after the update, the route table 50 of the own device is created and updated and stored.

  Also, as shown in FIG. 23, the host device 20 transmits the connection information 60 and the individual communicatable information 80 to the relay device 30, and causes the routing table 50 to be created. Although the individual communicatable information 80 is information of a device with which the relay device 30 can directly communicate, which is determined from the communication matrix 70 after the update, the entire communication matrix 70 is updated. It includes devices in both the upstream and downstream directions. Then, based on the individual communicatable information 80 received from the host device 20, the relay device 30 creates the routing table 50 of its own device.

<Functional configuration>
FIG. 24 is a functional block diagram of the host device 20-3 in the third embodiment. According to FIG. 24, in the host device 20-3, when the processing unit 200-3 is classified as the functional configuration, the connection information acquisition unit 202, the communication matrix generation unit 204, and the own device route table creation unit 218 And a first communication matrix updating unit 208, an own apparatus route list updating unit 220, a route list creation instructing unit 222, and a data aggregation unit 214. The first communication matrix updating unit 208 can be replaced with the second communication matrix updating unit 216.

  At the time of construction of the first communication network immediately after organization, which is the first generation, the own device route table creating unit 218 determines the route table 50 of the own device (host device 20) based on the communication matrix 70 generated by the communication matrix generation unit 204. Create The generated routing table 50 is stored as the host device routing table 308.

  At the time of reconstruction of the communication network by the solution of the vehicle 10, the own device route table updating unit 220 creates the route table of the own device (host device 20) according to the communication matrix generated by the first communication matrix updating unit 208. Do. The generated routing table is updated and stored as the host device routing table 308.

  The route table creation instructing unit 222 causes each relay device 30 included in the own train to create the route table 50 of the relay device 30. That is, at the time of construction of the first communication network immediately after organization, an apparatus capable of directly communicating with the relay device 30 based on the communication matrix 70 generated by the communication matrix generation unit 204 for each of the relay devices 30 is provided. The determination is made to generate the individual communicatable information 80, and the individual communicatable information 80 and the connection information 60 are transmitted to the relay device 30. In addition, at the time of reconstruction of the communication network by augmentation of the vehicle 10, direct communication with the relay device 30 is made to the relay device 30 based on the communication matrix 70 generated by the first communication matrix update unit 208. The individual communicatable information 80 is generated, and the individual communicatable information 80 and the connection information 60 are transmitted to the relay device 30.

  The storage unit 300-3 stores a third host control program 318, a communication matrix DB 304, a connection information DB 306, a host device path table 308, wireless communication performance information 312, and a sensor data group 314. Ru.

  FIG. 25 is a functional block diagram of the relay device 30-3 in the third embodiment. According to FIG. 25, in the relay device 30-3, the processing unit 500-3 includes a communication status check unit 502, a local device route table creation unit 508, and a data transmission control unit 506.

  The own device route table creating unit 508 creates the route table 50 of the own device (the relay device 30). That is, when constructing the first communication network immediately after organization, based on the connection information 60 received from the host device 20, the upstream and downstream devices and the connection order thereof are determined from the viewpoint of the own device. Then, whether or not direct communication with each other device in the uplink direction, which is the individual communicatable information 80 received from the host device 20, and direct communication with each other relay device 30 in the downlink direction by the communication status check unit 502 Based on the confirmation result, the routing table 50 of the own device is created.

  Further, at the time of reconstruction of the communication network by the solution of the vehicle 10, based on the connection information 60 received from the host device 20, the upstream and downstream devices and the connection order thereof are determined from the viewpoint of the own device. Then, based on the possibility of direct communication with each other device in the uplink and downlink directions, which is the individual communicatable information 80 received from the host device 20, the route table 50 of the own device is created.

  The storage unit 600-3 stores a third relay control program 610, connection information 60, a relay device route table 310, and a vehicle sensor data group 314.

<Flow of processing>
FIG. 26 is a flowchart for explaining the communication network construction process in the third embodiment. In FIG. 26, the left side shows the processing of the host device 20, and the right side shows the processing of the relay device 30. This process is realized by the processing unit 200-3 of the host device 20-3 executing the third host control program 318 and the processing unit 500-3 of the relay device 30-3 executing the third relay control program 610. The first process when the train is organized and starts operation, and the second process, which is performed each time the solution is completed. It is divided.

  The “first-time” process is a process of steps A1 to A3 and A33 to A37 of the host device 20 and B9 to B15 of the relay device 30. First, in the “first time” process, when the connection information acquisition unit 202 of the host device 20 acquires connection information (step A1), construction of a communication network for the first time is started. That is, the communication matrix generation unit 204 determines the relay device 30 configuring the own train with reference to the acquired connection information 60, and confirms the possibility of direct communication with each determined relay device 30 (step A3). Then, based on the confirmation result of the direct communication, the line portion of the communication matrix 70 for the host device 20 is updated (step A29). Next, the own device route table creating unit 218 creates the route table 50 of the own device (host device 20) (step A31).

  Subsequently, the route table creation instructing unit 222 causes each relay device 30 to create the route table 50 in order of proximity to the own device. That is, referring to the communication matrix 70, a device capable of directly communicating with the relay device 30 is determined to generate the individual communicatable information 80 (step A33), and the generated individual communicatable information 80 and the connection information 60 , And transmits to the relay device 30 (step A35). Then, in the relay device 30, the communication status confirmation unit 502 determines the downstream relay device 30 with reference to the received connection information 60, and confirms whether or not direct communication with each determined relay device 30 is possible (step B11) The confirmation result is transmitted to the host device 20 (step B13).

  Then, based on the result of confirmation of direct communication with each device in the downlink direction and the individual communicatable information 80 received from the host device 20, the own device route table creation unit 508 of the own device (relay device 30) The routing table 50 is created and stored (step B15). On the other hand, in the host device 20, the communication matrix generation unit 204 updates the line portion for the relay device 30 in the communication matrix 70 based on the direct communication confirmation result received from the relay device 30 (step A37).

  This completes the construction of the first communication network. Thereafter, train operation is started. Processing such as aggregation of sensor data after the start of train operation is similar to that of the first embodiment.

  After that, each time the solution consolidation of the vehicle 10 is performed, the construction of the communication network of each solution consolidation is executed. The process of “every increase in resolution” is a process of steps A12 to A19 and A39 to A41 of the host device 20 and a process of step B17 of the relay device 30.

  First, it is determined that the implementation of the consolidation is performed (Step A12). If the consolidation is performed (Step A12: YES), the consolidation information acquisition unit 202 of the host device 20 selects the consolidation information 60 about the formation after consolidation. Once acquired (step A13), reconstruction of the communication network is started. That is, the first communication matrix updating unit 208 creates the communication matrix 70 for the formation after augmentation (steps A15 to A17).

  Subsequently, the own device route table updating unit 220 creates, updates, and stores the route table 50 of the own device (host device 20) according to the communication matrix 70 after the update (step A19). Further, the route table creation instructing unit 222 causes each relay device 30 to create the route table 50. That is, referring to the communication matrix 70, the individual communicatable information 80 for the relay device 30 is generated (step A39), and the individual communicatable information 80 and the connection information 60 are transmitted to the relay device 30 (step A41). ). Then, in the relay device 30, the own device route table creation unit 508 determines the uplink and downlink devices and the connection order thereof based on the connection information 60 received from the host device 20, and the individual communicatable information 80 is obtained. Based on this, the routing table 50 of the own device (the relay device 30) is created, and updated and stored (step B17).

  This completes the construction of the communication network at the time of solution. Thereafter, the operation of the train is started with the new train formation, but the processing such as aggregation of sensor data after the start of operation is the same as that after the start of operation by the first train.

[Function effect]
As described above, according to the present embodiment, the communication network related to the wireless sensor network of the own train is relatively compared even when the plurality of trains are approaching or when the vehicle is subjected to the solution consolidation. It can be built easily. Also, since the relay device 30 searches for the route to the communication destination according to the stored routing table 50, the route search becomes easy, and the number of hops to the device of the communication destination (the number of devices to be routed) is as small as possible. The route can be selected, which leads to the reduction of the power consumption of the relay device 30.

  That is, according to the first embodiment and the second embodiment, the host device 20 updates the communication matrix 70 by using the connection information 60 (new connection information) for the formation after augmentation, and the updated communication The routing table 50 of the own device (host device 20) is updated according to the matrix 70, the routing table 50 of each relay device 30 is created, and the created routing table 50 is transmitted to the corresponding relay device 30.

  Also, according to the third embodiment, the host device 20 updates the communication matrix 70 using the connection information 60 (new connection information) for the formation after augmentation, and follows the updated communication matrix 70. The device (host device 20) is updated, and individual communicatable information 80, which is information of a device with which the relay device 30 can directly communicate, and new connection information are transmitted to each relay device 30. Then, the relay device 30 creates the routing table 50 based on the individual communicatable information 80 and the new connection information received from the host device 20, and updates and stores it.

[Modification]
The embodiment to which the present invention can be applied is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

(A) Confirmation of the possibility of direct communication by the relay device 30 Further, in the third embodiment, it is confirmed whether the relay device 30 can directly communicate with each device in the downlink direction and confirmation thereof The result may be reflected in the communication matrix 70. If the confirmation result is different from the received individual communicatable information 80, the difference may be transmitted to the host device 20.

(B)
In the third embodiment, the host device 20 may transmit only the connection information 60 (new connection information) after augmentation to each relay device 30. The relay device 30 determines the connection order with the other device from the new connection information, and based on the predetermined basic performance of the wireless communication of the own device, determines whether or not direct communication with the other device is possible, Create a routing table 50.

(C)
In each of the first to third embodiments, the construction / reconstruction of the network accompanying the acquisition of the connection information 60 in the host device 20 may be started by an external instruction via the operation unit 102.

(D)
Moreover, although it was set as the embodiment which applies this invention to a train, it is good also as applying this invention to each formation in, when comprising one train by several formation.

DESCRIPTION OF SYMBOLS 1 wireless communication system 10 vehicle 12 head vehicle 20 (20-1, 20-2, 20-3) host apparatus 102 operation part, 104 display part, 106 sound output part, 108 wireless communication part 110 sensor data input part 200- 1, 200-2, 200-3 processing unit 202 connection information acquisition unit 204 communication matrix generation unit 206 route table creation unit 208 first communication matrix update unit 210 route table update unit 212 route table transmission control unit 214 data aggregation Sections 216 Second communication matrix updating section 218 Own apparatus path table creating section, 220 Own apparatus path table updating section 222 Path table creating instructing section 300-1, 300-2, 300-3 Storage section 302 First host control program 304 Communication matrix DB, 306 Connection information DB
308 host apparatus route table 310 relay apparatus route table 312 wireless communication performance information 314 aggregated sensor data group 316 second host control program 318 third host control program 30 (30-1, 30-3) relay apparatus 402 Operation unit, 404 display unit, 406 sound output unit, 408 wireless communication unit 410 sensor data input unit 500-1, 500-3 processing unit 502 communication status confirmation unit 504 route table acquisition unit 506 data transmission control unit 508 own device Route table creation unit 600-1, 600-3 storage unit 602 first relay control program 604 connection information, 606 relay device route table 608 vehicle sensor data group 610 third relay control program 40 sensor 50 route table 60 connection information 60 70 communication matrix, 80 individual communication available information

Claims (6)

In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device is mounted, the host device and the relay device are configured to be able to wirelessly communicate with each other by multi-hop communication Said host device of a wireless communication system,
The host device is connected to the connecting vehicle sequence of the train and stores the identification information of the relay device, and the first hop destination when the host device communicates with the relay device as the destination. Store host first hop destination information indicating candidate relay devices, and direct communication availability information indicating whether each device of the host device and the relay device can communicate with each other in a single hop,
The relay device stores relay device origination first hop destination information which is a candidate of a device to be a first hop destination when communication is performed with the relay device other than the host device or the own device as a destination.
And input means for inputting new connection information (hereinafter referred to as "new connection information") after the consolidation of the relay vehicles in the train (the addition, closing, or both, the same applies hereinafter).
Based on a predetermined algorithm that defines a communicable range in single hop based on the relative position of each vehicle, using the new connection information, new host originating first hop destination information after new solution and new information Temporarily generating the direct communication availability information, the temporarily generated new host originating first hop destination information and the new direct communication availability information, the host originating first hop destination information and the stored information Updating means for performing correction with the direct communication availability information, and updating the stored host originating first hop destination information and the direct communication availability information to new information;
A unit that generates the relay apparatus origination first hop destination information after the resolution of each relay apparatus based on the updated direct communication availability information, and transmits the information to each relay apparatus;
Host device equipped with In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device is mounted, the host device and the relay device are configured to be able to wirelessly communicate with each other by multi-hop communication Said host device of a wireless communication system,
The host device is connected to the connecting vehicle sequence of the train and stores the identification information of the relay device, and the first hop destination when the host device communicates with the relay device as the destination. Store host first hop destination information indicating candidate relay devices, and direct communication availability information indicating whether each device of the host device and the relay device can communicate with each other in a single hop,
The relay device stores relay device origination first hop destination information which is a candidate of a device to be a first hop destination when communication is performed with the relay device other than the host device or the own device as a destination.
And input means for inputting new connection information (hereinafter referred to as "new connection information") after the consolidation of the relay vehicles in the train (the addition, closing, or both, the same applies hereinafter).
Based on the consolidation information before consolidation and the new consolidation information, it is regarded that the new relay vehicle after consolidation is replaced and located at the relay vehicle position before consolidation, and the replacement vehicle Using the relay device, update information corresponding to the number of overlapping vehicles between the number of vehicles before consolidation and the number of vehicles after consolidation among the host departure first hop destination information and the direct communication availability information First updating means,
If the number of vehicles after augmentation exceeds the number of vehicles prior to resolution, the host based on a predetermined algorithm defining a communicable range by single hop based on the relative position of each vehicle A second updating unit that complements and updates information corresponding to the number of excess vehicles among the first hop destination information and the direct communication availability information, from the new connection information;
A unit that generates the relay apparatus origination first hop destination information after the resolution of each relay apparatus based on the updated direct communication availability information, and transmits the information to each relay apparatus;
Host device equipped with In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device is mounted, the host device and the relay device are configured to be able to wirelessly communicate with each other by multi-hop communication Said host device of a wireless communication system,
The host device is connected to the connecting vehicle sequence of the train and stores the identification information of the relay device, and the first hop destination when the host device communicates with the relay device as the destination. Store host first hop destination information indicating candidate relay devices, and direct communication availability information indicating whether each device of the host device and the relay device can communicate with each other in a single hop,
The relay device stores relay device origination first hop destination information which is a candidate of a device to be a first hop destination when communication is performed with the relay device other than the host device or the own device as a destination.
And input means for inputting new connection information (hereinafter referred to as "new connection information") after the consolidation of the relay vehicles in the train (the addition, closing, or both, the same applies hereinafter).
Based on a predetermined algorithm that defines a communicable range in single hop based on the relative position of each vehicle, using the new connection information, new host originating first hop destination information after new solution and new information Temporarily generating the direct communication availability information, the temporarily generated new host originating first hop destination information and the new direct communication availability information, the host originating first hop destination information and the stored information Updating means for performing correction with the direct communication availability information, and updating the stored host originating first hop destination information and the direct communication availability information to new information;
A unit for transmitting, to each relay device, information (hereinafter referred to as “partial information”) related to the relay device among the updated direct communication availability information and the new connection information;
Host device equipped with In a train formed by a host vehicle on which a host device is mounted and a plurality of relay vehicles on which a relay device is mounted, the host device and the relay device are configured to be able to wirelessly communicate with each other by multi-hop communication Said host device of a wireless communication system,
The host device is connected to the connecting vehicle sequence of the train and stores the identification information of the relay device, and the first hop destination when the host device communicates with the relay device as the destination. Store host first hop destination information indicating candidate relay devices, and direct communication availability information indicating whether each device of the host device and the relay device can communicate with each other in a single hop,
The relay device stores relay device origination first hop destination information which is a candidate of a device to be a first hop destination when communication is performed with the relay device other than the host device or the own device as a destination.
And input means for inputting new connection information (hereinafter referred to as "new connection information") after the consolidation of the relay vehicles in the train (the addition, closing, or both, the same applies hereinafter).
Based on the consolidation information before consolidation and the new consolidation information, it is regarded that the new relay vehicle after consolidation is replaced and located at the relay vehicle position before consolidation, and the replacement vehicle Using the relay device, update information corresponding to the number of overlapping vehicles between the number of vehicles before consolidation and the number of vehicles after consolidation among the host departure first hop destination information and the direct communication availability information First updating means,
If the number of vehicles after augmentation exceeds the number of vehicles prior to resolution, the host based on a predetermined algorithm defining a communicable range by single hop based on the relative position of each vehicle A second updating unit that complements and updates information corresponding to the number of excess vehicles among the first hop destination information and the direct communication availability information, from the new connection information;
A unit for transmitting, to each relay device, information (hereinafter referred to as “partial information”) related to the relay device among the updated direct communication availability information and the new connection information;
Host device equipped with It is a relay apparatus which comprises the said radio | wireless communications system by radio | wireless communication with the host apparatus of Claim 1 or 2, Comprising:
A means for storing and updating the relay device originating first hop destination information received from the host device after increasing resolution;
A relay device equipped with It is a relay apparatus which comprises the said radio | wireless communications system by radio | wireless communication with the host apparatus of Claim 3 or 4, Comprising:
Means for storing and updating relay device originating first hop destination information after resolution based on the partial information and the new connection information received from the host device;
A relay device equipped with

Images