JP2017154642A - Host device and relay device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for configuring a radio communication system by applying a wireless sensor network to a vehicle state monitoring system.SOLUTION: In a radio communication system 1 comprising a host device 20 mounted on a head vehicle 12, and a relay device 30 mounted on each of other vehicles 10, the host device 20 uses connection information for a train composition after coupling/decoupling to update a communication matrix, which is information as to whether direct communication is possible between devices, updates a route table of itself (the host device 20) according to the updated communication matrix. It also creates a route table of each relay device 30 and transmits the created route table to the corresponding relay device 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wireless communication system that includes a host device and a relay device and performs multi-hop communication.

  A wireless sensor network, which is a wireless communication system composed of a host device and a relay device, transfers sensor data from sensor nodes installed at various locations of an object to be monitored to the host device by multi-hop communication via the relay device (relay node). This is a communication system to be aggregated (see, for example, Patent Document 1).

JP 2009-206749 A

  When considering applying a wireless sensor network to a vehicle state monitoring system that monitors the state of a railway vehicle, it is conceivable to install sensors in each vehicle and collect sensor data in units of trains. However, since the wireless sensor network is based on the premise that the monitoring object is fixedly defined in the first place, it is difficult to apply the wireless sensor network as it is to the vehicle state monitoring system. In other words, the train to be monitored by the vehicle state monitoring system may be connected to another vehicle (added, disconnected, or both, the same shall apply hereinafter) or when another vehicle state monitoring system is in operation. There may be other trains that are close together at a distance that allows wireless communication. It is necessary to consider such problems peculiar to railways.

  This 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 a method for constructing a static communication network, it is necessary to design a route between relay devices that transfer sensor data in advance, and set a route designed for each relay device. For this reason, it is necessary to redesign the route of the entire train after the reinforcement and change the settings of each relay device mounted on each vehicle after the reinforcement and reunion every time the vehicle is reinforced and reunited. . It takes time and design errors and setting errors are likely to occur. In addition, since it takes time, it is necessary to secure a certain amount of time before the departure after the refining.

  On the other hand, in the dynamic communication network construction method, each relay device searches for a route for each communication, but all communicable relay devices are candidates for communication destinations. For this reason, when another train in which another vehicle state monitoring system is operating, for example, when the station is stopped, a problem occurs that communication starts between the relay devices constituting each other's vehicle state monitoring system. To do. If it is designed to provide different communication network identification information for each train so that communication is not performed between different communication networks, the relay device related to the vehicle newly incorporated by the addition of the vehicle is connected to the previous communication network. If it is determined that they are different from each other, a situation in which communication with another relay device cannot be performed occurs, and sensor data cannot be aggregated for each train.

  Also, in the method of constructing a dynamic communication network, each relay device searches for a route every time it communicates, so that the power consumption of each relay device increases and the operation time when operating on a battery is 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 technique for configuring a wireless communication system by applying a wireless sensor network to a vehicle state monitoring system.

The first invention for solving the above-described problems is
In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device (for example, the relay device 30-1 in FIG. 13), the host device and the relay device are The host device (for example, the host device 20-1 of FIG. 12) of the wireless communication system (for example, the communication system 1 of FIG. 1) configured to be capable of wireless communication with each other by multi-hop communication,
The host device includes connection information (for example, connection information 60 in FIG. 12) in which the identification information of the relay device is stored in association with the connected vehicle order of the train, and communication in which the host device is addressed to each of the relay devices. The host-originating first hop destination information (for example, the host device routing table 308 in FIG. 12) indicating the candidates for the relay device as the first hop destination, and each of the host device and the relay device. Storing direct communication enable / disable information (for example, communication matrix 70 in FIG. 12) indicating whether or not each other can communicate with a single hop;
When the relay device performs communication destined for each of the host devices or relay devices other than its own device, the relay device first hop destination information (for example, FIG. 13) Own device route table 606), and
Input means for inputting new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, disassembly, or both, the same shall apply hereinafter). 12 link information acquisition units 202),
Based on a predetermined algorithm that defines a communicable range in a single hop based on the relative position of each vehicle, using the new connection information, the new first hop destination information originating from the host and new Tentatively generating the direct communication enable / disable information, the temporary host-generated first hop destination information and the new direct communication enable / disable information temporarily generated, Update means (first communication matrix in FIG. 12) that corrects with the direct communication availability information and updates the stored first hop destination information from the host and the direct communication availability information to new information. Update unit 208 and routing table update unit 210),
Based on the updated direct communication availability information, means for generating the first hop destination information originating from the relay device after the resolving of each relay device and transmitting the information to each relay device (route table transmission in FIG. 12) Control unit 212);
Is a host device.

  According to the first aspect of the present invention, the communication network related to the wireless sensor network of the own train can be relatively easily obtained even when another train is approaching or when the vehicle is reconciled. It can be constructed. In other words, the host device uses the new connection information after the resolving of the input relay vehicle, and based on a predetermined algorithm that defines a communication range in the first hop, each device of the host device and the relay device The direct communication availability information indicating whether or not communication is possible with each other in the first hop, and the first hop originating from the own device that is a candidate for the first hop destination when performing communication with each other device as the destination Update the destination information. Further, based on the updated direct communication availability information, the first hop destination information originating from the relay device of each relay device after resolving is generated and transmitted. Thereby, a communication network can be constructed in a relatively simple and short time.

The second invention is
In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device (for example, the relay device 30-1 in FIG. 13), the host device and the relay device are The host device (for example, the host device 20-2 in FIG. 20) of a wireless communication system configured to be able to wirelessly communicate with each other by multi-hop communication,
The host device includes connection information (for example, connection information 60 in FIG. 20) in which the identification information of the relay device is stored in association with the connected vehicle sequence of the train, and communication in which the host device is addressed to each of the relay devices. Host-originating first hop destination information (for example, the host device routing table 308 in FIG. 20), and each of the host device and the relay device, Storing direct communication availability information (for example, communication matrix 70 in FIG. 20) indicating whether or not each other can communicate with each other by a single hop;
When the relay device performs communication destined for each of the host devices or relay devices other than its own device, the relay device first hop destination information (for example, FIG. 13) Own device route table 606), and
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both, the same shall apply hereinafter) , The link information acquisition unit 202) of FIG.
Based on the connection information before the refinancing and the new connection information, it is assumed that the new relay vehicle after the reunification is located at the position of the relay vehicle before the reunification, and the Using the relay device, the information corresponding to the number of overlapping vehicles of the number of vehicles before the reconciled and the number of vehicles after the reconciled in the first hop destination information from the host and the direct communication availability information is updated. First update means (for example, the second communication matrix update unit 216 and the route table update unit 210 in FIG. 20);
Based on a predetermined algorithm that defines a single-hop communicable range based on the relative position of each vehicle when the number of vehicles after resolving exceeds the number of vehicles before resolving Second updating means (for example, the second communication matrix updating unit in FIG. 20) that updates the information for the number of excess vehicles in the first hop destination information and the direct communication availability information by complementing the new connection information. 216 and routing table update unit 210),
Based on the updated direct communication availability information, means for generating the first hop destination information originating from the relay device after the resolving of each relay device and transmitting the information to each relay device (for example, the route of FIG. 20) Table transmission control unit 212),
Is a host device.

  According to the second aspect of the present invention, the communication network related to the wireless sensor network of the own train can be relatively easily obtained even when another train is approaching or when the vehicle is reconciled. It can be constructed. In other words, the host device uses the connection information before the refining and the input new connection information after the refining, and the new vehicle after the refining is replaced at the position of the vehicle before the refining. As a result, the direct communication availability information is updated, and the first hop destination information originating from the own apparatus is updated. Further, based on the updated direct communication availability information, the first hop destination information originating from the relay device of each relay device after resolving is generated and transmitted. Thereby, a communication network can be constructed in a relatively simple and short time.

The third invention is
In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device (for example, the relay device 30-3 in FIG. 25), the host device and the relay device are 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 the first hop destination when the connection information in which the identification information of the relay device is stored in association with the train sequence of the train and the host device performs communication destined for each of the relay devices. First-hop destination information (host device routing table 308) indicating candidates for the relay device and whether or not the host device and each device of the relay device can communicate with each other in a single hop. Information (for example, communication matrix 70 in FIG. 24);
When the relay device performs communication destined for each of the host device or a relay device other than its own device, the relay device first hop destination information (for example, FIG. 25) Own device route table 606), and
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both, the same shall apply hereinafter) , The link information acquisition unit 202) of FIG.
Based on a predetermined algorithm that defines a communicable range in a single hop based on the relative position of each vehicle, using the new connection information, the new first hop destination information originating from the host and new Tentatively generating the direct communication enable / disable information, the temporary host-generated first hop destination information and the new direct communication enable / disable information temporarily generated, Update means for updating the stored first-hop destination information and the direct communication availability information stored in the host to new information by correcting with the direct communication availability information (first communication matrix in FIG. 24) Update unit 220 and own device route table update unit 220),
Of the updated direct communication availability information, information related to the relay device (hereinafter referred to as “partial information”) (for example, individual communication confirmation information 80 in FIG. 23) and the new connection information (for example, Means for transmitting the link information 60 in FIG. 23 (for example, the routing table creation instruction unit 222 in FIG. 24);
Is a host device.

  According to the third aspect of the invention, even when another train is approaching or when a vehicle is reconciled, the wireless communication communication networks according to the wireless sensor network of the own train are compared. Can be constructed easily. That is, the host device updates the direct communication availability information based on a predetermined algorithm that defines the communicable range in the first hop, using the inputted new connection information after the resolving result, Update the first hop destination information. Moreover, the partial information regarding the said relay apparatus and the new connection information are transmitted to each relay apparatus among the updated direct communication availability information. Thereby, a communication network can be constructed in a relatively simple and short time.

The fourth invention is:
In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device (for example, the relay device 30-3 in FIG. 25), the host device and the relay device are 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 the first hop destination when the connection information in which the identification information of the relay device is stored in association with the train sequence of the train and the host device performs communication destined for each of the relay devices. The first hop destination information originating from the host indicating the candidate relay device (for example, the host device route table 308 in FIG. 24) and whether each of the host device and the relay device can communicate with each other with a single hop. And direct communication availability information (for example, communication matrix 70 in FIG. 24),
When the relay device performs communication destined for each of the host device or a relay device other than its own device, the relay device first hop destination information (for example, FIG. 25) Own device route table 606), and
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both, the same shall apply hereinafter) , The link information acquisition unit 202) of FIG.
Based on the connection information before the refinancing and the new connection information, it is assumed that the new relay vehicle after the reunification is located at the position of the relay vehicle before the reunification, and the Using the relay device, the information corresponding to the number of overlapping vehicles of the number of vehicles before the reconciled and the number of vehicles after the reconciled in the first hop destination information from the host and the direct communication availability information is updated. First update means (for example, the second communication matrix update unit 210 and the own device route table update unit 220 in FIG. 20);
Based on a predetermined algorithm that defines a single-hop communicable range based on the relative position of each vehicle when the number of vehicles after resolving exceeds the number of vehicles before resolving Second updating means (for example, the second communication matrix updating unit in FIG. 20) that updates the information for the number of excess vehicles in the first hop destination information and the direct communication availability information by complementing the new connection information. 210 and its own device routing table update unit 220),
Means for transmitting information related to the relay device (hereinafter referred to as “partial information”) of the updated direct communication availability information and the new connection information to each relay device (for example, the route table creation current part in FIG. 24) 222),
Is a host device.

  According to the fourth aspect of the present invention, even when another train is approaching or when a vehicle is reconciled, the communication networks of the wireless communication related to the wireless sensor network of the own train are compared. Can be constructed easily. In other words, the host device uses the connection information before the refining and the input new connection information after the refining, and the new vehicle after the refining is replaced at the position of the vehicle before the refining. As a result, the direct communication availability information is updated, and the first hop destination information originating from the own apparatus is updated. Moreover, the partial information regarding the said relay apparatus and the new connection information are transmitted to each relay apparatus among the updated direct communication availability information. Thereby, a communication network can be constructed in a relatively simple and short time.

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

  According to the fifth aspect, the relay device stores and updates the relay device-originating first hop destination information transmitted from the host device. As a result, the relay device can be updated without creating the first hop destination information from the relay device in the current train, and when another train is approaching or when a vehicle is reconciled Even so, a communication network related to the wireless sensor network of the own train can be constructed 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,
Based on the partial information received from the host device and the new connection information, means for storing and updating the relay device-originating first hop destination information (for example, the own device route table 606 in FIG. 25) ( For example, the own device route table creation unit 508) of FIG.
You may comprise the relay apparatus provided with.

  According to the sixth aspect, the relay device stores the first hop destination information originating from the relay device after resolving based on the partial information of the direct communication availability information received from the host device and the new connection information. Update. As a result, the relay device can update the first hop destination information originating from the relay device in the current train without attempting wireless communication, and when other trains are approaching, Even if this is done, a communication network related to the wireless sensor network of the own train can be constructed relatively easily.

An application example of a wireless communication system for a vehicle state monitoring system. An example of a routing table. An example of amplification. An example of connection information. Explanatory drawing of confirmation of the propriety of the direct communication with each relay apparatus by a host apparatus. Explanatory drawing of confirmation of the possibility of the direct communication between relay apparatuses. An example of a communication matrix. Explanatory drawing of transmission of the routing table from a host apparatus to each relay apparatus. An example of amplification. An example of determination of the propriety of the direct communication between apparatuses based on the basic performance of radio | wireless communication. Explanatory drawing of correction | amendment of the communication matrix based on the communication matrix before an amplifying conclusion. The function block diagram of the host apparatus in 1st Example. The function block diagram of the relay apparatus in 1st Example. The flowchart of the construction process of the communication network in 1st Example. An example of a resolving result in which the number of organized vehicles decreases. Explanatory drawing of correction | amendment of the communication matrix based on the communication matrix before an amplifying conclusion. An example of resolving results in which the number of organized vehicles increases. Explanatory drawing of correction | amendment of the communication matrix based on the communication matrix before an amplifying conclusion. Explanatory drawing of the judgment of the propriety of the direct communication between the apparatuses which exceed after an amplifying conclusion. The function block diagram of the host apparatus in 2nd Example. The flowchart of the construction process of the communication network in 2nd Example. Explanatory drawing of the production | generation instruction | indication of the routing table with respect to the relay apparatus at the time of network construction. Explanatory drawing of the production | generation instruction | indication of the routing table with respect to the relay apparatus at the time of network reconstruction. The function block diagram of the host apparatus in 3rd Example. The functional block diagram of the relay apparatus in 3rd Example. The flowchart of the construction process of the communication network in 3rd Example.

[Overview]
The radio communication system according to the present embodiment is an application of the present invention to a vehicle state monitoring system that collects sensor data from sensors attached to each vehicle in a train train composed of a plurality of vehicles.

  FIG. 1 is an application example of a wireless communication system 1 for a vehicle state monitoring system. The wireless communication system 1 includes a host device 20 and a relay device 30. In the present embodiment, for simplification of description, as shown in FIG. 1, the host device 20 is mounted on the first vehicle 12 of the train, and the relay device 30 is mounted on each of the second and subsequent vehicles 10. To do. The host device 20 and the relay device 30 have a wireless communication function, and wireless communication between the devices is possible. Further, the host device 20 or the relay device 30 can perform wireless communication or wired communication with each sensor 40 attached to the mounted vehicle, and sensor data from each sensor 40 passes through the relay device 30. Centralized in the host device 20.

  Communication in the wireless communication system 1 is realized by multi-hop communication, and is a dynamic communication network that searches for a route to a destination (transmission 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 route table 50. FIG. 2 is an example of the route table 50. FIG. 2 shows a route table 50 (host-originating first hop destination information) of the host device 20 and a route table 50 (relaying device-originating first hop destination information) of the relay device 30. The route table 50 stores the candidates for the device as the first hop destination in association with each other device as the destination in order of priority. The route search is selected from the first hop destinations according to this priority order. In addition, because the first hop destination is not set indefinitely because it is multi-hop communication, the priority is set so that the number of hops to the destination device is reduced, and the first hop destination is set, so that the communication of the entire system Reduce the amount. For this reason, the first hop destinations are listed so that the priorities are higher in the order closer to the destination device.

  In a railway, for example, at a station on the way, an extension / reduction in which a vehicle is added / removed or both can be performed. Since the vehicle equipped with the driver's cab is usually the leading vehicle, in this embodiment, the host device 20 is mounted on the leading vehicle, and the second and subsequent vehicles are reinforced. That is, the leading vehicle is the host vehicle, and the relay vehicle on which the relay device 30 is mounted is added.

  FIG. 3 is an example of a vehicle intensification. In FIG. 3 (a), a train that had been in a 5-car train before the reunification was disassembled with a fourth vehicle 10c and a 4-car train after the reunion. In FIG. 3 (b), the train that had been in a 5-car train before the reunification was disassembled with the fourth vehicle 10c, and the vehicles 10e and 10f were reunioned. It is organized.

  In the vehicle state monitoring system, in order to collect sensor data for each train, it is necessary to construct one communication network for one train. That is, for one train, one communication network is constructed by the host device 20 and the relay device 30 mounted on each vehicle constituting the train. Therefore, when an increase / decrease is performed, since the vehicles 10 constituting one train are replaced, it is necessary to reconstruct a new communication network. Establishing a communication network means creating and setting the routing tables 50 of the host device 20 and the relay device 30 in this embodiment, that is, creating and setting the first hop destination of each device. Hereinafter, three embodiments of the communication network construction method in the wireless communication system 1 will be described.

[First embodiment]
In the first embodiment, the host device 20 creates a route table 50 for each device, thereby constructing a communication network.

(A) Construction of the first communication network First, construction of the first communication network immediately after train formation will be described. In constructing the communication network, the host device 20 is given connection information 60 that is information of each vehicle 10 constituting the train. Since the vehicles to be organized are determined in advance, 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 the vehicles 10 constituting the train, and the vehicle ID that is the identification information of each vehicle 10 and the host device 20 mounted on the vehicle 10. And the identification information of the relay device 30 and a device ID that also serves as a communication address. That is, the host device 20 can grasp the connection order of the vehicles 10 of the own train and the relay device 30 mounted on each vehicle 10 based on the connection information 60.

  In the construction of the communication network, first, the host device 20 refers to the connection information 60 and determines the relay device 30 that is a target for constructing 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 to check whether direct communication with the relay device 30 is possible. To do. Further, as shown in FIG. 6, each relay device 30 receives a confirmation request for direct communication from other upstream devices including the host device 20, and similarly, with each other downstream relay device 30. Whether the direct communication is possible is confirmed, and the confirmation result is notified to the host device 20. Here, the downward direction is a direction from the leading vehicle 12 toward the last vehicle, and conversely, a direction from the last vehicle toward the leading vehicle 12 is referred to as an upward direction. Thereby, the host device 20 can confirm whether direct communication between the relay devices 30 is possible.

  The confirmation result of whether or not direct communication between apparatuses is possible 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 is capable of single-hop communication (direct communication) between the host device 20 and the relay device 30. Direct communication availability information indicating whether or not direct communication between devices is possible, with the vertical direction being a transmission source device in the connection order and the horizontal direction being the transmission destination device in the connection order. However, in this embodiment, from the symmetry of communication transmission / reception, if direct communication between certain devices in one direction is possible, it is considered that direct communication in the reverse direction is also possible. For this reason, the communication matrix 70 stores only whether or not direct communication with other devices in the downlink direction is possible as a transmission destination.

  Based on this communication matrix 70, the host device 20 creates its own route table 50 and the route table 50 of each relay device 30. The route table 50 of a certain device (referred to as “target device”) is created as follows. That is, among the other devices that are the destinations when viewed from the target device, for the devices capable of direct communication, the destination device and other devices connected between the target device and the destination device are designated as destinations. The first hop ahead in order from the closest device. For devices that cannot be directly communicated, the devices that are connected between the target device and the destination device and that can communicate directly with the target device are listed in the order closer to the destination device. One hop away.

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

(B) Reconstruction of Communication Network after Augmentation Next, the reconstruction of the communication network accompanying the augmentation will be described. A case where the vehicle is coupled as shown in FIG. 9 will be described as an example. In FIG. 9, a seven-car train is formed by disengaging the vehicle 10c and adding the vehicles 10f and 10g to the six-car train in which five vehicles 10a to 10e are connected to the leading vehicle 12. Has been changed. That is, the vehicle 10c to 10e after the fourth vehicle is replaced with the vehicles 10d to 10g, although the same is applied to the third vehicle before and after the augmentation.

  Prior to refining, a communication network is constructed by the host device 20 mounted on the leading vehicle 12 and the relay devices 30a-30e mounted on the vehicles 10a-10e, respectively. With respect to the communication network before the expansion, after the expansion, the relay device 30c mounted on the disconnected vehicle 10c is excluded, and the relay device 30f mounted on each of the expanded vehicles 10f and 10g. , 30g must be constructed. That is, after the resolving and resolving, it is necessary to reconstruct the communication network by the host device 20 and the relay devices 30a, 30b, 30d to 30g.

  When reconfiguring the communication network, the host device 20 acquires the link information 60 (new link information) regarding the organization after the resolving. Since the information of the vehicle to be reciprocated is determined in advance, the connection information 60 (new connection information) related to the reciprocation is given to the host device 20. The host device 20 refers to the new connection information, and determines whether direct communication between the devices is possible or not based on a predetermined algorithm for the train after resolving, and generates a temporary communication matrix. The predetermined algorithm is a method for determining whether or not direct communication between devices is possible based on the basic performance of wireless communication of each device. The basic performance of wireless communication includes at least a distance where wireless communication is possible. In the present embodiment, it is assumed that the wireless communication distances for all the devices (host device 20 and relay device 30) are the same. In addition, the vehicle lengths of the vehicles 10 are all set to the same predetermined length, or the longest vehicle length that can be increased or reduced is set to the predetermined length. Based on these, the host device 20 determines for each device, for example, “direct communication is possible up to two devices ahead” according to a predetermined algorithm.

  FIG. 10 is an example of a determination result of whether or not direct communication is possible. In FIG. 10, the case where the range in which direct communication based on the basic performance of the wireless communication of each device is possible is “up to two-end devices” is indicated by a line with an arrow.

  Next, the generated temporary communication matrix is corrected based on the communication matrix before resolving, and the communication matrix is updated. FIG. 11 is an example of correction of the communication matrix based on the communication matrix before resolving. Before and after the refining, even if the vehicle order from the top is the same, it may be replaced with a different vehicle, or the same vehicle may be located in a different vehicle order. Therefore, the communication matrix is corrected by paying attention to the connecting order such as what number. That is, each device in the train after the augmentation is applied by applying the communication possibility between the devices defined in the communication matrix 70 for the train before the augmentation between the same connection order in the train after the augmentation. Correct the availability of wireless communication.

  As shown in the lower part of FIG. 11, the direct communication between the host device 20 that is the first car and the relay device 30c that is the fourth car is possible before the resolving, and therefore, as shown in the upper part of FIG. In addition, the communication matrix is corrected assuming that direct communication between the host device 20 that is the first car and the relay device 30d that is the fourth car is possible even after the reciprocation. Further, as shown in the lower part of the figure, before the resolving, direct communication between the relay apparatus 30a that is the second car and the relay apparatus 30c that is the fourth car is impossible. As described above, the communication matrix is corrected by regarding that direct communication between the second relay device 30a and the fourth relay device 30d is impossible even after the resolving.

  Thereafter, the host device 20 recreates the route table 50 of the own device (host device 20) and each relay device 30 in accordance with the updated communication matrix 70. Then, the host device 20 transmits the routing 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 settlement. The same communication network is reconstructed every time reinforcement is performed.

<Functional configuration>
FIG. 12 is a functional configuration diagram of the host device 20-1 in the first embodiment. 12, the host device 20-1 includes an operation unit 102, a display unit 104, a sound output unit 106, a wireless communication unit 108, a sensor data input unit 110, a processing unit 200-1, and a storage. It is a kind of computer comprised with the part 300-1.

The operation unit 102 is an input device realized by an input device such as a touch panel or various switches, for example, and outputs an operation signal corresponding to the operation input of the administrator to the processing unit 200-1.
The display unit 104 is a display device realized by an LCD (Liquid Crystal Display), for example, and performs various displays according to display signals from the processing unit 200-1.
The sound output unit 106 is an audio output device realized by a speaker or the like, for example, and outputs various sounds according to 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 by multi-hop communication with the relay device 30.
The communication unit 109 performs wireless communication with an external device that is a transmission destination of the aggregated sensor data group 314, an external device that is installed at a starting station that is the acquisition destination of the connection information 60, a station that reinforces the vehicle, or the like. 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, and the like. The processing unit 200-1 includes instructions and instructions to each unit configuring the host device 20 based on programs, data, and the like stored in the storage unit 300-1. Data transfer is performed and overall control of the host device 20 is performed. 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 Unit 210, routing table transmission control unit 212, and data aggregation unit 214. These functional units may be realized by software by the processing unit 200-1 executing a program, or may be realized by a dedicated processor or circuit. In the present embodiment, the former will be described.

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

  The communication matrix generation unit 204 generates a communication matrix for the own train when the first communication network is constructed immediately after the composition. 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 direct communication with each relay device 30 of the own train is attempted. Confirm whether direct communication is possible. Further, when confirming whether direct communication with each relay device 30 is possible, the connection information 60 is transmitted to each relay device 30 to request confirmation of direct communication with each other relay device 30. To do. Then, a communication matrix 70 is generated by collecting the confirmation result of whether or not the direct communication between the host device 20 and each relay device 30 is possible and the confirmation result of the direct communication between the relay devices 30 received from each relay device 30. To do. The generated communication matrix 70 is accumulated and stored in the communication matrix DB 304 in association with the identification number of the corresponding link information 60, for example.

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

  The first communication matrix update unit 208 generates the communication matrix 70 for the train after the reconnection in the reconfiguration of the communication network due to the increase and decrease in 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, whether the communication between the devices defined in the communication matrix 70 for the own train before the reunification is applied is applied between the same connection order in the own train after the reunification, and the own train after the reunification By changing the availability of wireless communication between the devices in, the temporary communication matrix is corrected to generate a communication matrix.

  Here, the basic performance of wireless communication includes the distance where wireless communication is possible, is common to all apparatuses, and is stored as wireless communication performance information 312. The generated communication matrix 70 is stored and stored as the communication matrix DB 304 in association with the identification number of the corresponding link information 60, for example.

  The route table update unit 210 is configured to reconfigure the host device 20 and each of the host train 20 in the train after the reconnection according to the communication matrix 70 generated by the first communication matrix update unit 208 when the communication network is reconstructed by the reconnection of the vehicle 10. The route table 50 of the relay device 30 is created. The generated route table 50 of the host device 20 is updated and stored as a host device route table 308. The route table 50 of each relay device 30 is associated with the identification number of the corresponding relay device 30 and is associated with the relay device route table. 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 constructing the first communication network immediately after formation of the first train. Take control. In addition, when the communication network is reconstructed by increasing / decreasing the vehicle 10, the routing table 50 of each relay device 30 created by the routing table update unit 210 is controlled to be transmitted to the relay device 30.

  The data aggregating unit 214 accumulates and stores sensor data (vehicle sensor data group 608 (see FIG. 13)) transmitted from each relay device 30 as an aggregated sensor data group 314, thereby aggregating sensor data related to the own train. To do. Further, the sensor data of the vehicle on which the host device 20 is mounted is also collected. Then, the aggregated 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 of arrival at a predetermined station. In this case, the data aggregating unit 214 is directed to a communication device (external device) installed at the station as an aggregate sensor data group. 314 is transmitted.

  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 controls the host device 20 in an integrated manner. The system program, programs and data for realizing various functions, etc. are stored and used as a work area of the processing unit 200-1, and calculation results and the like executed by the processing unit 200-1 according to the various programs are temporarily stored. Stored. In the storage unit 300-1, the first host control program 302, the connection information DB 306, the communication matrix DB 304, the host device route table 308, the relay device route table 310, the wireless communication performance information 312 and the aggregation are collected. Sensor data group 314 is stored.

  FIG. 13 is a functional configuration diagram of the relay device 30-1 in the first embodiment. 13, the relay device 30-1 includes an operation unit 402, a display unit 404, a sound output unit 406, a wireless communication unit 408, a sensor data input unit 410, a processing unit 500-1, and a storage. This is a kind 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, for example, and outputs an operation signal corresponding to an operation input by the administrator to the processing unit 500-1. The display unit 404 is a display device realized by an LCD or the like, for example, 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 a speaker or the like, for example, and outputs various sounds according to the audio signal from the processing unit 500-1. The wireless communication unit 408 is a device realized by a wireless communication module 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. 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, and an FPGA, and instructions and data to each unit configuring the relay device 30 based on programs, data, and the like stored in the storage unit 600-1. Transfer is performed and overall control of the relay device 30 is performed. Further, the processing unit 500-1 includes a communication status confirmation unit 502, a route table acquisition unit 504, and a data transmission control unit 506 when classified as a functional configuration. These functional units may be realized by software by the processing unit 500-1 executing a program, or may be realized by a dedicated processor or circuit. In the present embodiment, the former will be described.

  The communication status confirmation unit 502 confirms whether or not direct communication with another device is possible in response to a request from another device other than its own device such as the host device 20 or another relay device 30. That is, with reference to the connection information 60 received together with the confirmation request, other relay devices 30 connected in the downlink direction of the own device are determined, and direct communication is attempted with each of these other relay devices 30. Then, whether or not direct communication is possible is confirmed, and the confirmation result is transmitted to the host device 20. At this time, the connection information 60 is transmitted to each of the other relay devices 30 in the downlink direction to request confirmation of whether direct communication is possible.

  The route table acquisition unit 504 acquires the route table 50 received from the host device 20 and updates and stores it as the own device route 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 by multi-hop communication using the host device route table 606 with the host device 20 as a destination.

  The storage unit 600-1 is a storage device realized by, for example, a hard disk, a ROM, a RAM, and the like, and the processing unit 500-1 realizes a system program for integrated control of the relay device 30 and various functions. Are stored as a work area of the processing unit 500-1 and temporarily store results of operations executed by the processing unit 500-1 according to various programs. The storage unit 600-1 stores a first relay control program 602, connection information 604, a route table for own device 606, and a vehicle sensor data group 608.

<Process flow>
FIG. 14 is a flowchart for explaining the flow of communication network construction processing in the first embodiment. In FIG. 14, the processing of the host device 20 is shown on the left side, and the processing of the relay device 30 is shown on the right side. This processing 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. There are two types of processing: “first time” processing when trains are organized and starting operation, and “every time reinforcement” processing that is executed every time reinforcement is made. 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), the construction of the first communication network is started. That is, the communication matrix generation unit 204 refers to the acquired connection information 60 to determine the relay device 30 constituting the own train, confirms whether direct communication with each determined relay device 30 is possible, and each relay device. The connection information 60 is transmitted 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 confirmation unit 502 refers to the received connection information 60 to determine the downstream relay device 30, and determines Whether direct communication with each relay device 30 is possible or not is confirmed (step B1), and the confirmation result is transmitted to the host device 20 (step B3). In the host device 20, the communication matrix generation unit 204 determines 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. Is 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 in accordance with the generated communication matrix 70 (step A9), and the routing table transmission control unit 212 creates the routing 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 routing table acquisition unit 504 updates and stores the routing table received from the host device 20 (step B5).

  This completes the construction of the first communication network. Thereafter, the train operation starts. 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 stores the accumulated vehicle sensor data group 608. Based on the own device path table 606, multi-hop communication to the host device 20 is performed at a predetermined cycle. In the host device 20, the vehicle sensor data group 608 transmitted from each relay device 30 and the sensor data group of the vehicle (host vehicle) on which the host device 20 is mounted are aggregated and accumulated and stored as an aggregated sensor data group 314. , And transmitted to the external device at a predetermined timing.

  After that, every time the vehicle is reconciled, the construction of the communication network “every recombination” is executed. The process of “every resolving result” is the process of steps A12 to A23 of the host device 20 and step B7 of the relay device 30.

  First, it is determined whether or not the reinforcement is performed by an instruction operation from the driver's cab or the input of new connection information 60 (step A12). If the connection information acquisition unit 202 of the host device 20 acquires the connection information 60 (new connection information) about the organization after the expansion (step A13), the connection information acquisition unit 202 of the host device 20 acquires the connection information (step A13). Start rebuilding. That is, the first communication matrix update unit 208 refers to the acquired connection information 60, determines whether direct communication between the devices in the organization after the resolving is possible based on the basic performance of the wireless communication, A communication matrix is generated (step A15). Next, based on the previous communication matrix 70, the availability of direct communication between the devices is corrected, and the temporary communication matrix is updated (step A17).

  Subsequently, the routing table updating unit 210 creates and updates the routing table 50 of the host device 20 in accordance with the updated communication matrix 70 (step A19). Further, 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 converts the generated routing table 50 of each relay device 30 into the corresponding relay device. 30 (step A23). Then, in the relay device 30, the routing table acquisition unit 504 updates and stores the routing table 50 received from the host device 20 (step B7).

  This completes the construction of the communication network at the time of augmentation. Thereafter, the train operation is started with a new vehicle organization, but the processing such as the aggregation of sensor data after the operation is started is the same as after the start of the first operation.

[Second Embodiment]
Next, a second embodiment will be described. The second embodiment is different from the first embodiment in the method of updating the communication matrix after the vehicle is reconciled. The same components as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment, the communication matrix is updated by applying the possibility of direct communication between the devices defined by the communication matrix before the amplification solution to the devices in the same connection order in the organization after the amplification solution. . In other words, it is considered that the new vehicle 10 after the enrichment is replaced and positioned at the position of the vehicle 10 before the augmentation. For devices at overlapping positions before and after amplification, the direct communication between the devices before amplification is applied as it is between the devices at overlapping positions after amplification. For vehicles in positions that do not overlap later, a communication matrix is generated by determining whether direct communication with other devices is possible based on a predetermined algorithm based on the basic performance of wireless communication.

  This will be specifically described. FIG. 15 is an example in which the number of trained cars decreases after the completion of the increase. In FIG. 15, the train that had been in a 5-car train before the reunification is disassembled with the fourth vehicle 10c, and has become a 4-car train after the reunion. That is, before and after the reinforcement, four vehicles overlap as the number of vehicles, and the fourth vehicle 10c is replaced with the vehicle 10d among the overlapping vehicles 10.

  In this case, as shown in FIG. 16, whether or not direct communication between each device from the first vehicle to the fourth vehicle in the communication matrix 70 before the augmentation is made up of four overlapping before and after the augmentation is possible. Is taken over as it is as the possibility of direct communication between the devices from the first car to the fourth car after refining. At the same time, for the fourth vehicle that was replaced before and after the augmentation, the relay device 30c that was installed in the vehicle 10c that was the fourth vehicle before the augmentation was installed in the fourth vehicle 10d that was replaced after the augmentation. The communication matrix 70 is modified by replacing the relay device 30d. Moreover, the item about the 5th vehicle which decreased after the resolving result is deleted from the communication matrix 70.

  FIG. 17 is an example in which the number of knitting vehicles increases due to reinforcement. In FIG. 17, a train that had a four-car train before the reunification was added to the vehicles 10d and 10e, and a six-car train after the reunion. That is, before and after the reunification, four cars overlap as the number of vehicles, and the fifth to sixth cars exceed the number of duplicate vehicles and are added.

  In this case, as shown in FIG. 18, whether or not direct communication between each device from the first vehicle to the fourth vehicle, which are four overlapping in the communication matrix 70 before and after augmentation, is performed. Is taken over as it is as the possibility of direct communication between the devices from the first car to the fourth car after refining. As shown in FIG. 19, the relay devices 30d and 30e mounted on the fifth and sixth vehicles 10d and 10e exceeding the number of overlapping vehicles are the same as those described in the first embodiment. Based on a predetermined algorithm based on the basic performance of communication, it is determined whether direct communication with other devices is possible. That is, whether or not direct communication is possible is determined under an algorithm that direct communication is possible for up to two vehicles. In FIG. 19, direct communication in which the transmission destination or the transmission source is the relay devices 30 d and 30 e among the direct communication in the downlink direction is represented by an arrow line.

<Functional configuration>
FIG. 20 is a functional configuration 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 a functional configuration, the connection information acquisition unit 202, the communication matrix generation unit 204, the route table creation unit 206, 2 communication matrix update unit 216, route table update unit 210, route table transmission control unit 212, and data aggregation unit 214.

  The second communication matrix updating unit 216 generates a communication matrix 70 for the own train after the increased / resolved time when the communication network is reconstructed by increasing / reducing 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. For devices at overlapping positions before and after amplification, the direct communication between the devices before amplification is applied as it is between the devices at overlapping positions after amplification. For vehicles in positions that do not overlap later, a communication matrix is generated by determining whether direct communication with other devices is possible based on a predetermined algorithm based on the basic performance of wireless communication. The generated communication matrix 70 is accumulated and stored as the communication matrix DB 304 in association with the identification number of the corresponding link information 60, for example.

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

<Process flow>
FIG. 21 is a flowchart for explaining the flow of communication network construction processing in the second embodiment. In FIG. 21, the processing of the host device 20 is shown on the left side, and the processing of 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. This process is realized by In addition, as in the first embodiment, the “first time” process when the train is organized and starts operation, and the “every recombination result” process that is executed every time the renewal result is made, It is divided into two.

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

  After that, every time the vehicle 10 is increased / reduced, the construction of the communication network “every increase / decrease” is executed. The “every resolving result” process is the process 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 in the first embodiment.

  First, it is determined whether or not an increase / decrease is performed (step A12). When acquired (step A13), the reconstruction of the communication network is started. That is, the second communication matrix updating unit 216 refers to the acquired connection information 60, and for the devices mounted on the vehicle 10 that overlap before and after the augmentation, direct communication between the devices before the augmentation is performed. The communication matrix 70 is generated by taking over the availability (step A25). Moreover, about the apparatus mounted in the vehicle 10 which surpasses after resolving, based on the basic performance of radio | wireless communication, the possibility of direct communication with other each apparatus is judged, and it adds and updates to a communication matrix ( Step A27).

  Subsequently, the routing table updating unit 210 creates and updates the routing table 50 of the host device 20 in accordance with the updated communication matrix 70 (step A19). Further, 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 converts the generated routing table 50 of each relay device 30 into the corresponding relay device. 30 (step A23). Then, in the relay device 30, the routing table acquisition unit 504 updates and stores the routing table 50 received from the host device 20 (step A25).

  This completes the construction of the communication network at the time of expansion. Thereafter, the train operation is started with a new vehicle organization, but the processing such as the aggregation of sensor data after the operation is started is the same as after the start of the first operation.

[Third embodiment]
Next, a third embodiment will be described. The third embodiment differs from the first and second embodiments in that the relay device 30 itself creates the routing table 50 of the relay device 30. The same components as those in the first and second embodiments described above are denoted by the same reference numerals, and detailed description thereof is omitted.

(A) At the time of construction of the first communication network First, the construction of the first communication network immediately after train formation will be described. As in the first embodiment, the host device 20 confirms whether direct communication with each relay device 30 in the own train is possible (see FIG. 5). As a result, the communication matrix 70 is in a state in which values are stored only for one row whose transmission source is the host device 20.

  Next, as illustrated in FIG. 22, the host device 20 transmits the connection information 60 and the individual communicable information 80 to the relay device 30 to create the route table 50. The individual communicable information 80 is information on a device that 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 performed in order from the relay device 30 closest to the host device 20. Further, in the communication matrix 70, whether or not direct communication between the relay devices 30 is possible is stored based on the confirmation result received from the relay device 30 as described later. For this reason, the individual communicable information 80 is information indicating whether direct communication with each device in the uplink direction is possible or not as viewed from the target relay device 30.

  Specifically, the host device 20 first targets the second relay device 30a, and transmits the link information 60 and the individual communicable information 80 indicating the host device 20 to the relay device 30a. The relay device 30a refers to the received connection information 60, determines that the other relay devices 30 connected in the downlink direction as viewed 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 check whether direct communication is possible. Then, the relay device 30a creates the route table 50 of the own device based on the confirmation result of whether direct communication is possible and the individual communicable information 80 received from the host device 20. That is, the first hop destination destined for each device in the uplink direction as seen from the own device is determined based on the individual communicable information 80 received from the host device 20, and the first hop destined for each device in the downlink direction The destination is determined based on whether or not direct communication confirmed by the own apparatus is possible.

  In addition, the relay device 30 a transmits a confirmation result of whether or not direct communication with each downstream relay device 30 is possible to the host device 20. Based on the confirmation result of whether direct communication is possible or not received from the relay device 30a, the host device 20 updates one line in the communication matrix 70 that uses the relay device 30a as a transmission source. The same applies to the relay devices 30 in the third and subsequent cars.

(B) Reconstruction of Communication Network after Augmentation Next, a description will be given of the time of reconstruction of the communication network accompanying the augmentation. The host device 20 updates the communication matrix 70 for the composition after the reinforcement by the method of the first embodiment or the second embodiment described above. Then, the route table 50 of the own device is created according to the updated communication matrix 70 and updated and stored.

  Further, as illustrated in FIG. 23, the host device 20 transmits the connection information 60 and the individual communicable information 80 to the relay device 30 to create the route table 50. The individual communicable information 80 is information on a device that can directly communicate with the relay device 30 determined from the updated communication matrix 70, but since the entire communication matrix 70 is updated, As a result, it includes both upstream and downstream devices. Then, the relay device 30 creates its own route table 50 based on the individual communicable information 80 received from the host device 20.

<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 a functional configuration, the connection information acquisition unit 202, the communication matrix generation unit 204, the own device route table creation unit 218, The first communication matrix update unit 208, the own device route table update unit 220, the route table creation instruction unit 222, and the data aggregation unit 214. The first communication matrix update unit 208 can be replaced with the second communication matrix update unit 216.

  The own device route table creation 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 when the first communication network is constructed immediately after the initial composition. Create The generated route table 50 is stored as the host device route table 308.

  The own device route table update unit 220 creates a route table of the own device (host device 20) according to the communication matrix generated by the first communication matrix update unit 208 when the communication network is reconstructed by the resolving of the vehicle 10. To do. The generated routing table is updated and stored as the host device routing table 308.

  The route table creation instruction 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 the construction of the first communication network immediately after the organization, a device that can directly communicate with the relay device 30 is established for each relay device 30 based on the communication matrix 70 generated by the communication matrix generation unit 204. The individual communicable information 80 is generated by determination, and the individual communicable information 80 and the connection information 60 are transmitted to the relay device 30. In addition, when the communication network is reconstructed by increasing / decreasing the vehicle 10, each relay device 30 is directly communicated with the relay device 30 based on the communication matrix 70 generated by the first communication matrix update unit 208. The individual communicable information 80 is determined and the individual communicable information 80 is generated, and the individual communicable 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. The

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

  The own device route table creation unit 508 creates the route table 50 of the own device (relay device 30). That is, at the time of building the first communication network immediately after the organization, based on the connection information 60 received from the host device 20, the upstream and downstream devices and their connection order are determined from the own device. Then, whether or not direct communication with each other device in the uplink, which is the individual communicable information 80 received from the host device 20, is possible, and direct communication with each other relay device 30 in the downlink by the communication status confirmation unit 502 Based on the confirmation result, the route table 50 of the own device is created.

  Further, when the communication network is reconstructed by increasing / decreasing the vehicle 10, based on the connection information 60 received from the host device 20, the uplink and downlink devices and their connection order are determined from the own device. Based on the individual communicable information 80 received from the host device 20, whether or not direct communication with other devices in the upstream and downstream directions is possible 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.

<Process flow>
FIG. 26 is a flowchart for explaining a communication network construction process in the third embodiment. In FIG. 26, the processing of the host device 20 is shown on the left side, and the processing of the relay device 30 is shown on the right side. This processing 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. There are two types of processing: “first time” processing when trains are organized and starting operation, and “every time reinforcement” processing that is executed every time reinforcement is made. Divided.

  The “first time” processing is processing 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 link information acquisition unit 202 of the host device 20 acquires link information (step A1), construction of the first communication network is started. That is, the communication matrix generation unit 204 refers to the acquired connection information 60 to determine the relay device 30 that constitutes the own train, and confirms whether direct communication with each determined relay device 30 is possible (step A3). Based on the confirmation result of the direct communication, the row portion for the host device 20 in the communication matrix 70 is updated (step A29). Next, the own device route table creation unit 218 creates the route table 50 of the own device (host device 20) (step A31).

  Subsequently, the routing table creation instructing unit 222 causes each relay device 30 to create the routing table 50 in the order closer 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 communicable information 80 (step A33), and the generated individual communicable information 80 and the link information 60 are obtained. Then, the data is transmitted to the relay device 30 (step A35). Then, in the relay device 30, the communication status confirmation unit 502 refers to the received connection information 60 to determine the downstream relay device 30, and confirms whether direct communication with each determined relay device 30 is possible (step). B11), and the confirmation result is transmitted to the host device 20 (step B13).

  Then, the own device route table creation unit 508 determines the own device (relay device 30) based on the confirmation result of the direct communication with each device in the downlink direction and the individual communicable information 80 received from the host device 20. The route 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 row portion for the relay device 30 in the communication matrix 70 based on the confirmation result of the direct communication received from the relay device 30 (step A37).

  This completes the construction of the first communication network. Thereafter, the train operation starts. Processing such as aggregation of sensor data after the train operation is started is the same as in the first embodiment.

  After that, every time the vehicle 10 is increased / reduced, the construction of the communication network “every increase / decrease” is executed. The processing of “every resolving result” is the processing of steps A12 to A19 and A39 to A41 of the host device 20 and step B17 of the relay device 30.

  First, it is determined whether or not an increase / decrease is performed (step A12). When acquired (step A13), the reconstruction of the communication network is started. That is, the first communication matrix update unit 208 creates the communication matrix 70 for the knitting after reinforcement (steps A15 to A17).

  Subsequently, the own device route table updating unit 220 creates and updates the route table 50 of the own device (host device 20) according to the updated communication matrix 70 (step A19). Further, the routing table creation instruction unit 222 causes each relay device 30 to create the routing table 50. That is, referring to the communication matrix 70, the individual communicable information 80 for the relay device 30 is generated (step A39), and the individual communicable 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 upstream and downstream devices and their connection order based on the connection information 60 received from the host device 20, and sets the individual communicable information 80. The route table 50 of the own device (relay device 30) is created and updated and stored (step B17).

  This completes the construction of the communication network at the time of augmentation. Thereafter, the train operation is started with a new vehicle organization, but the processing such as the aggregation of sensor data after the operation is started is the same as after the start of the first operation.

[Function and effect]
As described above, according to the present embodiment, even when a plurality of trains are approaching or when a vehicle is reconciled, the communication network related to the wireless sensor network of the own train is relatively It can be easily constructed. Further, since the relay device 30 searches for a route to the communication destination according to the stored route table 50, the route search is facilitated and the number of hops to the communication destination device (the number of devices passing through) is as small as possible. A route can be selected, which leads to a reduction in 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 using the connection information 60 (new connection information) about the organization after the resolving result, and the updated communication. According to the matrix 70, the route table 50 of the own device (host device 20) is updated, the route table 50 of each relay device 30 is created, and the created route table 50 is transmitted to the corresponding relay device 30.

  Further, according to the third embodiment, the host device 20 updates the communication matrix 70 using the connection information 60 (new connection information) about the organization after the resolving result, and automatically updates the communication matrix 70 according to the updated communication matrix 70. The device (host device 20) is updated, and the individual communicable information 80, which is information on the 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 and updates the route table 50 based on the individual communicable information 80 and the new connection information received from the host device 20.

[Modification]
In addition, the applicable embodiment of this invention is not limited to the above-mentioned embodiment, It can change suitably in the range which does not deviate from the meaning of this invention.

(A) Confirmation of Direct Communication Possible by Relay Device 30 In the third embodiment, the relay device 30 confirms whether or not direct communication with each device in the downstream direction is possible, and confirms the confirmation. The result may be reflected in the communication matrix 70. If the confirmation result is different from the received individual communicable 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 the resolving result to each relay device 30. The relay device 30 determines the connection order with other devices from the new connection information, determines whether direct communication with other devices is possible based on the predetermined basic performance of the wireless communication of the own device, A route table 50 is created.

(C)
In each of the first to third embodiments, the network construction / reconstruction 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 embodiment which applies this invention with respect to a train, it is good also as applying this invention to each organization in the case of comprising one train by multiple organization.

DESCRIPTION OF SYMBOLS 1 Wireless communication system 10 Vehicle, 12 Lead 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 link 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 Unit 216 second communication matrix update unit 218 own device route table creation unit 220 own device route table update unit 222 route table creation instruction unit 300-1, 300-2, 300-3 storage unit 302 first host control program 304 Communication matrix DB, 306 Connection information DB
308 Host Device Route Table, 310 Relay Device 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 Device 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, 70 Communication matrix, 80 Individual communication possible information

Claims (6)

In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device, the host device and the relay device are configured to be capable of wireless communication with each other by multi-hop communication. The host device of a wireless communication system,
The host device is the first hop destination when the connection information in which the identification information of the relay device is stored in association with the train sequence of the train and the host device performs communication destined for each of the relay devices. Storing the first hop destination information originating from the host indicating a candidate for the relay device, and direct communication availability information indicating whether each of the host device and the relay device can communicate with each other in a single hop,
The relay device stores first hop destination information originating from a relay device that is a candidate for a device that is a first hop destination when performing communication with each of the host device or a relay device other than its own device as a destination,
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both; the same shall apply hereinafter);
Based on a predetermined algorithm that defines a communicable range in a single hop based on the relative position of each vehicle, using the new connection information, the new first hop destination information originating from the host and new Tentatively generating the direct communication enable / disable information, the temporary host-generated first hop destination information and the new direct communication enable / disable information temporarily generated, Updating with the direct communication availability information, updating the stored first-hop destination information from the host and the direct communication availability information to new information;
Based on the updated direct communication availability information, means for generating the first hop destination information originating from the relay device after resolving each of the relay devices, and transmitting to each relay device;
Host device with In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device, the host device and the relay device are configured to be capable of wireless communication with each other by multi-hop communication. The host device of a wireless communication system,
The host device is the first hop destination when the connection information in which the identification information of the relay device is stored in association with the train sequence of the train and the host device performs communication destined for each of the relay devices. Storing the first hop destination information originating from the host indicating a candidate for the relay device, and direct communication availability information indicating whether each of the host device and the relay device can communicate with each other in a single hop,
The relay device stores first hop destination information originating from a relay device that is a candidate for a device that is a first hop destination when performing communication with each of the host device or a relay device other than its own device as a destination,
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both; the same shall apply hereinafter);
Based on the connection information before the refinancing and the new connection information, it is assumed that the new relay vehicle after the reunification is located at the position of the relay vehicle before the reunification, and the Using the relay device, the information corresponding to the number of overlapping vehicles of the number of vehicles before the reconciled and the number of vehicles after the reconciled in the first hop destination information from the host and the direct communication availability information is updated. First updating means;
Based on a predetermined algorithm that defines a single-hop communicable range based on the relative position of each vehicle when the number of vehicles after resolving exceeds the number of vehicles before resolving Second update means for supplementing and updating the information for the excess number of vehicles in the first hop destination information and the direct communication availability information from the new connection information;
Based on the updated direct communication availability information, means for generating the first hop destination information originating from the relay device after resolving each of the relay devices, and transmitting to each relay device;
Host device with In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device, the host device and the relay device are configured to be capable of wireless communication with each other by multi-hop communication. The host device of a wireless communication system,
The host device is the first hop destination when the connection information in which the identification information of the relay device is stored in association with the train sequence of the train and the host device performs communication destined for each of the relay devices. Storing the first hop destination information originating from the host indicating a candidate for the relay device, and direct communication availability information indicating whether each of the host device and the relay device can communicate with each other in a single hop,
The relay device stores first hop destination information originating from a relay device that is a candidate for a device that is a first hop destination when performing communication with each of the host device or a relay device other than its own device as a destination,
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both; the same shall apply hereinafter);
Based on a predetermined algorithm that defines a communicable range in a single hop based on the relative position of each vehicle, using the new connection information, the new first hop destination information originating from the host and new Tentatively generating the direct communication enable / disable information, the temporary host-generated first hop destination information and the new direct communication enable / disable information temporarily generated, Updating with the direct communication availability information, updating the stored first-hop destination information from the host and the direct communication availability information to new information;
Means for transmitting information related to the relay device (hereinafter referred to as “partial information”) of the updated direct communication availability information and the new connection information to each relay device;
Host device with In a train formed by a host vehicle equipped with a host device and a plurality of relay vehicles equipped with a relay device, the host device and the relay device are configured to be capable of wireless communication with each other by multi-hop communication. The host device of a wireless communication system,
The host device is the first hop destination when the connection information in which the identification information of the relay device is stored in association with the train sequence of the train and the host device performs communication destined for each of the relay devices. Storing the first hop destination information originating from the host indicating a candidate for the relay device, and direct communication availability information indicating whether each of the host device and the relay device can communicate with each other in a single hop,
The relay device stores first hop destination information originating from a relay device that is a candidate for a device that is a first hop destination when performing communication with each of the host device or a relay device other than its own device as a destination,
Input means for inputting the new connection information (hereinafter referred to as “new connection information”) after the connection of the relay vehicle in the train (addition, connection, or both; the same shall apply hereinafter);
Based on the connection information before the refinancing and the new connection information, it is assumed that the new relay vehicle after the reunification is located at the position of the relay vehicle before the reunification, and the Using the relay device, the information corresponding to the number of overlapping vehicles of the number of vehicles before the reconciled and the number of vehicles after the reconciled in the first hop destination information from the host and the direct communication availability information is updated. First updating means;
Based on a predetermined algorithm that defines a single-hop communicable range based on the relative position of each vehicle when the number of vehicles after resolving exceeds the number of vehicles before resolving Second update means for supplementing and updating the information for the excess number of vehicles in the first hop destination information and the direct communication availability information from the new connection information;
Means for transmitting information related to the relay device (hereinafter referred to as “partial information”) of the updated direct communication availability information and the new connection information to each relay device;
Host device with A relay device configuring the wireless communication system by wireless communication with the host device according to claim 1 or 2,
Means for storing and updating the relay device first hop destination information received from the host device after resolving;
A relay device comprising: A relay device configuring the wireless communication system by wireless communication with the host device according to claim 3 or 4,
Means for storing and updating the first hop destination information originating from the relay device based on the partial information and the new connection information received from the host device;
A relay device comprising:

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