JPWO2020021779A1 - Communication system, host device, collection device and communication method - Google Patents

Abstract

The communication system includes a plurality of monitoring devices for transferring information, a collecting device for acquiring the information transferred by the monitoring device, and a host device, and the host device is between the host device and the collector device. The list information of the first terminal identifier used in the lower layer in the communication and the list information of the second terminal identifier used in the lower layer in the communication between the collecting device and the monitoring device are held, and each of the monitoring devices and the collecting device. A different second terminal identifier is fixedly assigned to each of the device and the higher-level device, and each of the monitoring device, the collecting device, and the higher-level device has the second terminal identifier as a source address and a destination address. Sends and receives the stored packet.

Description

The present invention relates to a communication system, a host device, a collecting device and a communication method.
This application claims priority on the basis of Japanese application Japanese Patent Application No. 2018-139233 filed on July 25, 2018, and incorporates all of its disclosures herein.

As an example of the network system, for example, Japanese Patent No. 6046480 (Patent Document 1) discloses the following configuration.

That is, in the network system, a radio station is installed in each tower of the tower row in which the transmission line is erected, and at least one of the radio stations is connected to a master station that can be connected to an external communication line to connect these radio stations. Therefore, information can be sequentially relayed in both directions from the radio station to the master station or from the master station to the radio station along the tower row, and the radio station can be relayed from one side of the tower row. The first communication includes a first communication memory for storing the transmitted information and a second communication memory for storing the information sent from the other side of the tower row. In a power transmission tower maintenance information radio network system that relays the information stored in the memory to the other side and relays the information stored in the second communication memory to the one side, the radio station has the information. An identification number is individually assigned, and the radio station that is the source of the information transmits the information with the identification number of its own station, and the master station identifies the radio station. It has an identification number conversion table that associates the numbers with the tower numbers assigned to the tower where the radio station is installed, and a plurality of transmission lines are laid side by side on the tower, and they are the same. A plurality of the tower numbers corresponding to each transmission line are assigned to the iron tower, and the master station assigns the identification number of the radio station that transmitted the information based on the identification number conversion table to each transmission line. It is converted into a plurality of the tower numbers corresponding to. The master station communicates with a higher-level host station via an external communication line such as a mobile phone line.

Japanese Patent No. 6046480

(1) The communication system of the present disclosure is a communication system used for a power system, and is a plurality of monitoring devices for transferring information, a collecting device for acquiring the information transferred by the monitoring device, and the collecting device. A first lower layer which is a lower layer in communication between the upper device and the collecting device and a second lower layer which is a lower layer in communication between the collecting device and the monitoring device. Unlike the layer, the upper device holds the first list information of the first terminal identifier used in the first lower layer and the second list information of the second terminal identifier used in the second lower layer. A different second terminal identifier is fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the plurality of monitoring devices, the collecting device, and the higher-level device are assigned source addresses. And a packet in which the second terminal identifier is stored as a destination address is transmitted and received.

(3) The higher-level device of the present disclosure is a higher-level device in a communication system used in a power system, and the communication system acquires a plurality of monitoring devices for transferring information and the information transferred by the monitoring device. The first lower layer, which is a lower layer in communication between the upper device and the collecting device, and the collecting device and the monitoring device, which are provided with the collecting device and the upper device capable of communicating with the collecting device. Unlike the second lower layer, which is a lower layer in communication, the upper device uses the first list information of the first terminal identifier used in the first lower layer, and the first list information used in the second lower layer. The second list information of the two terminal identifiers is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the higher-level device is the source address. And a packet in which the second terminal identifier is stored as a destination address is transmitted / received between the plurality of monitoring devices and the collecting device.

(4) The collecting device of the present disclosure is a collecting device in a communication system used in a power system, and the communication system acquires a plurality of monitoring devices for transferring information and the information transferred by the monitoring device. The first lower layer, which is a lower layer in communication between the higher device and the collecting device, and the collecting device and the monitoring device, which are provided with the collecting device and a higher device capable of communicating with the collecting device. Unlike the second lower layer, which is a lower layer in communication, the collecting device uses the first list information of the first terminal identifier used in the first lower layer, and the first list information used in the second lower layer. The second list information of the two terminal identifiers is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the collecting device is a source address. And a packet in which the second terminal identifier is stored as a destination address is transmitted / received between the plurality of monitoring devices and the higher-level device.

(5) The communication method of the present disclosure is a communication method in a communication system used for a power system, and the communication system acquires a plurality of monitoring devices for transferring information and the information transferred by the monitoring device. Communication between the first lower layer, which is a lower layer in communication between the upper device and the collecting device, and the collecting device and the monitoring device, which includes a collecting device and a higher device capable of communicating with the collecting device. Unlike the second lower layer, which is the lower layer in the above, the upper device uses the first list information of the first terminal identifier used in the first lower layer, and the second lower layer used in the second lower layer. The second list information of the terminal identifier is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the monitoring device, the collecting device, or the above-mentioned A step in which the host device transmits a packet in which the second terminal identifier is stored as a source address and a destination address, and a step in which the monitoring device, the collector device, or the host device receives the transmitted packet. And include.

One aspect of the present disclosure can be realized not only as a communication system including such a characteristic processing unit, but also as a program for causing a computer to execute such a characteristic processing. Further, one aspect of the present disclosure can be realized as a semiconductor integrated circuit that realizes a part or all of a communication system.

Further, one aspect of the present disclosure can be realized not only as a higher-level device provided with such a characteristic processing unit, but also as a method in which the characteristic processing is a step, or such a step can be performed on a computer. It can be realized as a program to be executed. Further, one aspect of the present disclosure can be realized as a semiconductor integrated circuit that realizes a part or all of the host device.

Further, one aspect of the present disclosure can be realized not only as a collecting device provided with such a characteristic processing unit, but also as a method in which the characteristic processing is a step, or such a step can be performed on a computer. It can be realized as a program to be executed. Further, one aspect of the present disclosure can be realized as a semiconductor integrated circuit that realizes a part or all of the collecting device.

FIG. 1 is a diagram showing a configuration of a communication system according to an embodiment of the present invention. FIG. 2 is a diagram showing an application example of the communication system according to the embodiment of the present invention. FIG. 3 is a block diagram showing a configuration of a monitoring parent device in the communication system according to the embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of a monitor device in the communication system according to the embodiment of the present invention. FIG. 5 is a diagram showing an example of address allocation in the communication system according to the embodiment of the present invention. FIG. 6 is a diagram showing an example of first list information held by a host device in the communication system according to the embodiment of the present invention. FIG. 7 is a diagram showing an example of the second list information held by the host device in the communication system according to the embodiment of the present invention. FIG. 8 is a diagram showing an example of first list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 9 is a diagram showing an example of first list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 10 is a diagram showing an example of the second list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 11 is a diagram showing an example of the second list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 12 is a diagram showing an example of a main part of a packet in the communication system according to the embodiment of the present invention. FIG. 13 is a diagram showing an example of a packet used between a host device and a collecting device in the communication system according to the embodiment of the present invention. FIG. 14 is a diagram showing an example of a packet used between a collecting device and a wireless master unit in the communication system according to the embodiment of the present invention. FIG. 15 is a diagram showing an example of packets used between monitoring devices in the communication system according to the embodiment of the present invention. FIG. 16 is a diagram showing an example of a sequence of information transmission in the communication system according to the embodiment of the present invention.

[Issues to be solved by this disclosure]
In the network system described in Patent Document 1, while communication is performed between radio stations and between radio stations and master stations by, for example, a specified low power radio in the 2.4 GHz band, mobile phones are carried between the master station and the upper host station. Communication is performed by telephone line or the like.

Therefore, the communication protocol used between the radio stations and between the radio station and the master station is different from the communication protocol used between the master station and the upper host station. When communication is performed between devices having different communication protocols, for example, it is conceivable to provide an address table for translating the address used in each communication protocol in each of the upper host station and the master station.

However, in such a configuration, in addition to requiring address conversion processing, when updating the address table for maintenance purposes, etc., if the updates are not consistent between the address tables, communication problems will occur. It may occur.

The present disclosure has been made to solve the above-mentioned problems, and an object thereof is to provide a communication system, a higher-level device, a collecting device, and a communication method capable of realizing more stable operation in an electric power system. That is.

[Effect of the present disclosure]
According to the present disclosure, more stable operation can be realized in the electric power system.

[Explanation of Embodiments of the Invention]
First, the contents of the embodiments of the present invention will be listed and described.

(1) The communication system according to the embodiment of the present invention is a communication system used for a power system, and is a plurality of monitoring devices for transferring information and a collecting device for acquiring the information transferred by the monitoring device. In the first lower layer which is a lower layer in the communication between the upper device and the collecting device and the lower layer in the communication between the collecting device and the monitoring device. Unlike a second lower layer, the higher device comprises first list information of first terminal identifiers used in the first lower layer and second terminal identifiers used in the second lower layer. 2 The list information is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the plurality of monitoring devices, the collecting device, and the higher-level device are fixedly assigned. Sends and receives a packet in which the second terminal identifier is stored as a source address and a destination address.

As described above, the first list information of the first terminal identifier used in the lower layer of the communication between the upper device and the collecting device and the second of the second terminal identifier used in the lower layer of the communication between the collecting device and the monitoring device. Due to the configuration in which the higher-level device holds the list information and a different second terminal identifier is fixedly assigned to each of the plurality of monitoring devices, the collecting device, and the higher-level device, the lower layer and the collecting device between the higher-level device and the collecting device. And the difference in the lower layer between the monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device and the collecting device. Therefore, it is not necessary to perform the address conversion process in the higher-level device and the collecting device, and it is not necessary to match the update of the address table between the higher-level device and the collecting device. Therefore, more stable operation can be realized in the power system.

(2) Preferably, the communication system includes a plurality of sets of the collecting device and the plurality of monitoring devices, and different network identifiers are fixedly assigned to each set, and the first list information is the above. The correspondence between the network identifier and the first terminal identifier is shown, the second list information shows the correspondence between the network identifier and the second terminal identifier, and the network identifier is further stored in the packet. ..

With such a configuration, it is possible to more stably operate a communication system including a plurality of systems, each of which is composed of a collecting device and a plurality of monitoring devices, and a host device.

(3) The higher-level device according to the embodiment of the present invention is a higher-level device in a communication system used in a power system, and the communication system is transferred by a plurality of monitoring devices for transferring information and the monitoring device. The first lower layer and the collecting device, which are lower layers in communication between the upper device and the collecting device, include the collecting device for acquiring the information and the upper device capable of communicating with the collecting device. Unlike the second lower layer, which is a lower layer in the communication between the monitoring devices, the upper device is the first list information of the first terminal identifier used in the first lower layer, and the second lower layer. The second list information of the second terminal identifier used in the layer is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the higher-level device is used. Sends and receives a packet in which the second terminal identifier is stored as a source address and a destination address between the plurality of monitoring devices and the collecting device.

As described above, the first list information of the first terminal identifier used in the lower layer of the communication between the upper device and the collecting device and the second of the second terminal identifier used in the lower layer of the communication between the collecting device and the monitoring device. Due to the configuration in which the higher-level device holds the list information and a different second terminal identifier is fixedly assigned to each of the plurality of monitoring devices, the collecting device, and the higher-level device, the lower layer and the collecting device between the higher-level device and the collecting device. And the difference in the lower layer between the monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device and the collecting device. Therefore, it is not necessary to perform the address conversion process in the higher-level device and the collecting device, and it is not necessary to match the update of the address table between the higher-level device and the collecting device. Therefore, more stable operation can be realized in the power system.

(4) The collecting device according to the embodiment of the present invention is a collecting device in a communication system used in a power system, and the communication system is transferred by a plurality of monitoring devices for transferring information and the monitoring device. The first lower layer and the collecting device, which are the lower layers in the communication between the upper device and the collecting device, include the collecting device for acquiring the information and the upper device capable of communicating with the collecting device. Unlike the second lower layer, which is a lower layer in the communication between the monitoring devices, the collecting device has the first list information of the first terminal identifier used in the first lower layer, and the second lower layer. The second list information of the second terminal identifier used in the layer is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device, and the collecting device is used. Sends and receives a packet in which the second terminal identifier is stored as a source address and a destination address between the plurality of monitoring devices and the host device.

As described above, the first list information of the first terminal identifier used in the lower layer of the communication between the upper device and the collecting device and the second of the second terminal identifier used in the lower layer of the communication between the collecting device and the monitoring device. The lower layer and the collecting device between the upper device and the collecting device are configured so that the collecting device holds the list information and a different second terminal identifier is fixedly assigned to each of the plurality of monitoring devices, the collecting device, and the higher device. And the difference in the lower layer between the monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device and the collecting device. Therefore, it is not necessary to perform the address conversion process in the higher-level device and the collecting device, and it is not necessary to match the update of the address table between the higher-level device and the collecting device. Therefore, more stable operation can be realized in the power system.

(5) The communication method according to the embodiment of the present invention is a communication method in a communication system used for a power system, and the communication system is transferred by a plurality of monitoring devices for transferring information and the monitoring device. A first lower layer, which is a lower layer in communication between the upper device and the collecting device, and the collecting device and the collecting device, which are provided with a collecting device for acquiring the information and a higher device capable of communicating with the collecting device. Unlike the second lower layer, which is a lower layer in communication between monitoring devices, the upper device is the first list information of the first terminal identifier used in the first lower layer, and the second lower layer. The second list information of the second terminal identifier used in the above is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device. The step in which the collecting device or the higher-level device transmits a packet in which the second terminal identifier is stored as a source address and a destination address, and the monitoring device, the collecting device, or the higher-level device is transmitted. Includes steps to receive the packet.

As described above, the first list information of the first terminal identifier used in the lower layer of the communication between the upper device and the collecting device and the second of the second terminal identifier used in the lower layer of the communication between the collecting device and the monitoring device. Due to the configuration in which the higher-level device holds the list information and a different second terminal identifier is fixedly assigned to each of the plurality of monitoring devices, the collecting device, and the higher-level device, the lower layer and the collecting device between the higher-level device and the collecting device. And the difference in the lower layer between the monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device and the collecting device. Therefore, it is not necessary to perform the address conversion process in the higher-level device and the collecting device, and it is not necessary to match the update of the address table between the higher-level device and the collecting device. Therefore, more stable operation can be realized in the power system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated. In addition, at least a part of the embodiments described below may be arbitrarily combined.

[Configuration and basic operation]
FIG. 1 is a diagram showing a configuration of a communication system according to an embodiment of the present invention.

With reference to FIG. 1, the communication system 301 is a communication system used in the power system. Specifically, the communication system 301 is, for example, a communication system installed in a power transmission facility installed between a power plant and a consumer of electric power, for example, detection of a lightning strike position on the power transmission facility and a transmission line. It is used for temperature monitoring and maintenance of power transmission equipment.

The communication system 301 includes one or more monitoring systems T and a host device 181. The monitoring system T includes a collecting device 151 and one or more monitoring devices 101. In the example shown in FIG. 1, the communication system 301 includes two monitoring systems T1 and T2 as the monitoring system T.

The monitoring device 101 has a function of transferring information. As used herein, "transfer" includes, for example, relaying information to a relay destination and transmitting information to a relay destination as a source of information.

Specifically, as a "transfer", the monitoring device 101 transmits, for example, the information received from the other monitoring device 101 to another monitoring device 101 different from the other monitoring device 101, and the self. Information indicating the measurement result of the sensor 111 in the above is transmitted to another monitoring device 101.

The monitoring device 101 is a device having a wireless communication function. The monitoring device 101 performs specific low power wireless communication using, for example, a communication band of the 920 MHz band.

Types of the monitoring device 101 include a monitoring master device 102 having a function as a master unit and a monitoring child device 103 having a function as a slave unit and performing wireless communication with the monitoring master device 102. The monitoring parent device 102 and the plurality of monitoring child devices 103 perform multi-hop communication.

When a plurality of monitoring devices 101 are provided, the plurality of monitoring devices 101 transmit information in series via a wireless transmission line, that is, are connected in series via a wireless transmission line. That is, in the communication system 301, instead of forming a transmission line in which a plurality of monitoring devices 101 are arranged in parallel or in a mesh shape, a wireless transmission line in which a plurality of monitoring devices 101 are arranged in series is formed. In this case, the monitoring system T includes one monitoring parent device 102 and one or more monitoring child devices 103.

The host device 181 is a device capable of communicating with the collecting device 151. The host device 181 can communicate with the collection device 151 via, for example, a mobile phone line.

The collection device 151 receives the information transmitted from the monitoring parent device 102, and transfers the received information to the host device 181. Further, the collecting device 151 receives the information transmitted from the host device 181 and transfers the received information to the monitoring parent device 102.

Hereinafter, the supervisor device 103 side as viewed from the supervisor device 181 may be referred to as the “downstream side”, and the supervisor device 181 side as viewed from the supervisor device 103 may be referred to as the “upstream side”. Further, the direction from the host device 181 to the monitor device 103 may be referred to as a "downward direction", and the direction from the monitor device 103 to the supervisor device 181 may be referred to as an "upward direction".

The number of monitoring devices 101 included in the monitoring system T is not particularly limited, and is, for example, 50 or more.

The monitoring parent device 102 acquires measurement information indicating the measurement result of the sensor by itself, and transfers the acquired measurement information to the collection device 151.

Further, the monitoring parent device 102 acquires the measurement information from the monitoring child device 103, and transfers the acquired measurement information to the collecting device 151. Further, the monitoring parent device 102 receives the setting information and the like from the collecting device 151, and transfers the received setting information and the like to the monitoring child device 103.

The monitor device 103 acquires measurement information indicating the measurement information of the sensor by itself, and transfers the acquired measurement information to another monitor device 103 or the monitoring parent device 102 on the upstream side.

Further, the monitor device 103 acquires measurement information from the other monitor device 103 on the downstream side, and transfers the acquired measurement information to the other monitor device 103 or the monitor parent device 102 on the upstream side. Further, the monitor device 103 receives the setting information and the like from the other monitor device 103 on the upstream side or the monitoring parent device 102, and transfers the received setting information and the like to the other monitor device 103 on the downstream side.

When the received information is addressed to itself, the collection device 151 and the monitoring device 101 process the received information without transferring the information.

FIG. 2 is a diagram showing an application example of the communication system according to the embodiment of the present invention.

With reference to FIG. 2, a plurality of monitoring devices 101 are installed at different positions in the power system, for example, at a plurality of positions where information necessary for maintenance of the power system can be detected. Specifically, for example, a plurality of monitoring devices 101 are installed in a plurality of steel towers 2 provided in an electric power system. The overhead ground wire 3 and the transmission line 4 are erected between the adjacent steel towers 2.

The monitoring device 101 may be installed in all the towers 2 of the section to be monitored, or may be installed in a part of the towers 2 of the section to be monitored.

Specifically, the monitoring devices 101 may be installed in a plurality of steel towers 2 installed side by side, for example, every other, every two, or every three. In the example shown in FIG. 2, every other monitoring device 101 is installed. Whether the monitoring device 101 is installed in all the towers 2 or in some of the towers 2 is determined based on, for example, the installation interval of the towers 2.

Further, the monitoring device 101 is not limited to the steel tower 2, and may be installed around the steel tower 2, or may be installed, for example, on a power transmission line 4, an overhead ground wire 3, or the ground.

FIG. 3 is a block diagram showing a configuration of a monitoring parent device in the communication system according to the embodiment of the present invention.

With reference to FIG. 3, the monitoring parent device 102 includes a communication unit 104, a battery 106, a control unit 107, a storage unit 108, and a sensor 111.

The communication unit 104 transmits measurement information indicating the amount of electric charge measured by the sensor 111 of its own monitoring parent device 102 to the collection device 151. The communication unit 104 and the collection device 151 are connected by wire, for example, and perform serial communication with each other.

The battery 106 supplies electric power to the control unit 107, the sensor 111, the communication unit 104, the storage unit 108, and the like.

The control unit 107 controls the operations of the sensor 111, the communication unit 104, and the like. Specifically, for example, the control unit 107 periodically controls the communication unit 104 to be turned on and the communication unit 104 to be turned off when a predetermined time elapses.

As an example, the sensor 111 measures the amount of electric charge of the overhead ground wire 3. The detection target of the sensor 111 is not particularly limited.

Further, when the control unit 107 receives predetermined information indicating an area where a lightning strike is expected, a period during which a lightning strike is expected, and the like from the host device 181 via the communication unit 104 and the collection device 151, the control unit 107 controls, for example, a switch (not shown). As a result, the power supply from the battery 106 to the sensor 111 is started, and the sensor 111 is controlled to transition from the off state to the on state.

The control unit 107 receives the measurement information indicating the amount of electric charge measured by the sensor 111, and outputs the received measurement information to the communication unit 104. Then, when a predetermined time elapses after the sensor 111 is turned on, for example, the control unit 107 stops the power supply from the battery 106 to the sensor 111 by controlling a switch (not shown) to stop the sensor 111. Controls the transition from the on state to the off state.

The storage unit 108 stores a short address or the like, which will be described later, assigned to its own monitoring parent device 102.

With reference to FIG. 1 again, the collecting device 151 transmits the measurement information received from the monitoring parent device 102 to the host device 181.

The host device 181 receives the measurement information from the collection device 151, and performs various calculations based on the received measurement information. For example, the host device 181 receives measurement information indicating the amount of electric charge from the plurality of monitoring devices 101 via the collecting device 151, and distributes the amount of electric charge among the plurality of iron towers 2 based on the amount of electric charge indicated by each received measurement information. Is calculated, and the lightning strike position is estimated based on the calculated distribution of the amount of electric charge.

FIG. 4 is a block diagram showing a configuration of a monitor device in the communication system according to the embodiment of the present invention.

With reference to FIG. 4, the monitor device 103 includes a communication unit 105, a battery 106, a control unit 107, a storage unit 108, and a sensor 111.

The communication unit 105 transmits the measurement information indicating the amount of electric charge measured by the sensor 111 of its own monitor device 103 to the other monitor device 103 or the monitor parent device 102 on the upstream side. When the communication unit 105 receives the measurement information indicating the amount of electric charge from the monitor device 103 located on the downstream side, the communication unit 105 transfers the received measurement information to another monitor device 103 or the monitoring parent device 102 on the upstream side. ..

FIG. 5 is a diagram showing an example of address allocation in the communication system according to the embodiment of the present invention. Hereinafter, a case where the communication system 301 includes the monitor device 103_1 and the monitor device 103_2, which are the monitor devices 103, will be described. The monitor device 103_1 and the monitor device 103_2 are installed in this order from the upstream side.

With reference to FIG. 5, in the communication system 301, the first lower layer which is a lower layer in the communication between the upper device 181 and the collecting device 151 and the lower layer which is the lower layer in the communication between the collecting device 151 and the monitoring device 101. It is different from the lower layer of 2.

Specifically, communication using, for example, a mobile phone line is performed between the host device 181 and the collection device 151. Between the upper device 181 and the collecting device 151, a communication protocol for a mobile phone line, for example, IP is used as the communication protocol of the first lower layer.

On the other hand, for example, serial communication is performed between the collection device 151 and the monitoring parent device 102. A communication protocol for serial communication is used as the communication protocol of the second lower layer between the collection device 151 and the monitoring parent device 102.

Further, between the monitoring parent device 102 and the monitoring child device 103, and between the monitoring child device 103, for example, specific low power wireless communication using a communication band of the 920 MHz band according to the communication standard of IEEE802.1.5 is performed. Between the monitoring parent device 102 and the monitoring child device 103, and between the monitoring child devices 103, the communication protocol for the specific low power wireless communication is used as the communication protocol of the second lower layer.

The upper device 181 holds the first terminal identifier used in the first lower layer, for example, the first list information of the IP address in a storage unit (not shown).

FIG. 6 is a diagram showing an example of first list information held by a host device in the communication system according to the embodiment of the present invention.

With reference to FIG. 6, the first list information TL1 shows the correspondence between the PAN_ID, the IP address of the higher-level device 181 and the IP address of the collection device 151 for each monitoring system T managed by the higher-level device 181.

Further, the upper device 181 holds the second terminal identifier used in the second lower layer, for example, the second list information of the short address in a storage unit (not shown).

FIG. 7 is a diagram showing an example of the second list information held by the host device in the communication system according to the embodiment of the present invention.

With reference to FIG. 7, the second list information TL2 includes a monitoring system number, a PAN_ID, a short address of the host device 181 and a short address of the collecting device 151 for each monitoring system T managed by the host device 181. The correspondence between the short address and tower number of the monitoring parent device 102, the short address and tower number of the monitoring child device 103_1, and the short address and tower number of the monitoring child device 103_2 is shown.

The monitoring system number and tower number indicate the installation location of the tower. As a result, the user can specify the monitoring device 101 or the like in the desired tower for the host device 181 by inputting the monitoring system number and the tower number to the host device 181 and acquire various information. can.

The collection device 151 holds the first terminal identifier used in the first lower layer, for example, the first list information of the IP address in a storage unit (not shown).

Specifically, for example, the first list information is list information of IP addresses assigned to the host device 181 and the collection device 151.

FIG. 8 is a diagram showing an example of first list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 8 shows an example of the first list information held by the collection device 151 belonging to the monitoring system T1.

With reference to FIG. 8, the first list information SL1 shows the correspondence between the PAN_ID of the monitoring system T1, the IP address of the host device 181 and the IP address of the collecting device 151.

FIG. 9 is a diagram showing an example of first list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 9 shows an example of the first list information held by the collection device 151 belonging to the monitoring system T2.

With reference to FIG. 9, the first list information SL1 shows the correspondence between the PAN_ID of the monitoring system T2, the IP address of the higher-level device 181 and the IP address of the collecting device 151.

Further, the collecting device 151 holds the second terminal identifier used in the second lower layer, for example, the second list information of the short address in a storage unit (not shown).

Specifically, for example, the second list information is list information of short addresses given to the host device 181, the collecting device 151, the monitoring parent device 102, and the monitoring child device 103.

FIG. 10 is a diagram showing an example of the second list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 10 shows an example of the second list information held by the collection device 151 belonging to the monitoring system T1.

With reference to FIG. 10, the second list information SL2 contains the monitoring system number, the PAN_ID, the short address of the host device 181 and the short address of the collecting device 151, and the short address of the monitoring parent device 102 of the monitoring system T1. The correspondence between the tower number, the short address and tower number of the monitor device 103_1, and the short address and tower number of the monitor device 103_2 is shown.

FIG. 11 is a diagram showing an example of the second list information held by the collecting device in the communication system according to the embodiment of the present invention. FIG. 11 shows an example of the second list information held by the collection device 151 belonging to the monitoring system T2.

With reference to FIG. 11, the second list information SL2 contains the monitoring system number, the PAN_ID, the short address of the host device 181 and the short address of the collecting device 151, and the short address of the monitoring parent device 102 of the monitoring system T2. The correspondence between the tower number, the short address and tower number of the monitor device 103_1, and the short address and tower number of the monitor device 103_2 is shown.

As described above, in the communication system 301, different first terminal identifiers, for example, IP addresses are fixedly assigned to the collection device 151 and the host device 181.

Further, different second terminal identifiers, for example, short addresses, are fixedly assigned to the collection device 151, the monitoring parent device 102, the monitoring child device 103, and the host device 181.

Further, different network identifiers, for example, PAN_ID (Personal Area Network Identification) are fixedly assigned to the monitoring systems T1 and T2.

In the communication system 301, the monitoring parent device 102, the plurality of monitoring child devices 103, the collecting device 151, and the higher-level device 181 use the second terminal identifier as the source address and the destination address, for example, the source short address and the destination short address. Send and receive packets stored in each.

FIG. 12 is a diagram showing an example of a main part of a packet in the communication system according to the embodiment of the present invention.

With reference to FIG. 12, the packet transmitted between the host device 181 and the collection device 151 includes a TCP / IP header, a routing header, an application header and an application payload. TCP / IP headers and routing headers are used for lower layer communication, and application headers and application payloads are used for higher layer communication. The packet may include data other than the contents shown in FIG.

The host device 181 can recognize the contents of the application header and the application payload. On the other hand, the collecting device 151 cannot recognize the contents of the application header and the application payload.

The packet transmitted between the collecting device 151 and the monitoring parent device 102 includes a serial header, a routing header, an application header, and an application payload. Serial headers and routing headers are used for lower layer communication, and application headers and application payloads are used for higher layer communication.

The collecting device 151 and the monitoring parent device 102 can recognize the contents of the serial header and the routing header, but cannot recognize the contents of the application header and the application payload.

The packet transmitted between the monitoring parent device 102 and the monitoring child device 103 includes a radio header, a routing header, an application header, and an application payload. Radio headers and routing headers are used for lower layer communication, and application headers and application payloads are used for higher layer communication.

The monitoring parent device 102 and the monitoring child device 103 can recognize the contents of the radio header and the routing header, but cannot recognize the contents of the application header and the application payload.

Packets transmitted between observer devices 103 include radio headers, routing headers, application headers and application payloads. Radio headers and routing headers correspond to lower layers, and application headers and application payloads correspond to higher layers.

The observer device 103 can recognize the contents of the radio header and the routing header, but cannot recognize the contents of the application header and the application payload.

FIG. 13 is a diagram showing an example of a packet used between a host device and a collecting device in the communication system according to the embodiment of the present invention. FIG. 13 shows the format of the IP packet.

With reference to FIG. 13, the IP packet includes a TCP / IP header and a routing packet stored in the payload.

The TCP / IP header includes, for example, a "destination IP address" and a "source IP address".

The routing packet includes, for example, a routing header and an application packet stored in the payload.

The routing header includes, for example, a "destination PAN_ID", a "source PAN_ID", a "destination short address" and a "source short address".

The application packet contains, for example, an application header and an application payload.

The application payload includes target information such as measurement information. The target information includes, for example, information used for maintenance of a power system such as a power transmission facility. Specifically, when the monitoring device 101 is installed in the steel tower 2, the target information includes, for example, measurement information indicating the amount of charge used for detecting the position of a lightning strike on the power transmission facility, and the temperature used for temperature monitoring of the power transmission line 4. The measurement information indicating the inclination of the steel tower 2, the measurement information indicating the inclination of the steel tower 2, the measurement information indicating the depth of snow on the ground, and the like are included.

When the monitoring device 101 is installed on the power transmission line 4, the target information includes, for example, measurement information indicating the amount of charge used for detecting the position of a lightning strike on the power transmission facility, and the temperature used for temperature monitoring of the power transmission line 4. It includes the measurement information to be shown, the measurement information to show the inclination due to the slack of the transmission line 4, and the like.

When the monitoring device 101 is installed on the overhead ground wire 3, the target information is, for example, measurement information indicating the amount of charge used for detecting the position of a lightning strike on the power transmission facility, and temperature monitoring of the overhead ground wire 3. It includes measurement information indicating temperature, measurement information indicating inclination due to slack of the overhead ground wire 3, and the like.

When the monitoring device 101 is installed on the ground around the steel tower 2, the target information indicates, for example, measurement information indicating the inclination of the ground, measurement information indicating vibration of the ground, or the depth of snow cover on the ground. Includes measurement information, etc.

The detection target of the sensor 111 and the type of the sensor 111 in the monitoring device 101 are appropriately set according to the type of the target information.

FIG. 14 is a diagram showing an example of a packet used between a collecting device and a wireless master device in the communication system according to the embodiment of the present invention. FIG. 14 shows the format of a serial packet transmitted by serial communication.

With reference to FIG. 14, the serial packet includes a serial header and a routing packet stored in the payload.

The serial header is a header used for serial communication. The routing packet has the same contents as the routing packet shown in FIG.

FIG. 15 is a diagram showing an example of packets used between monitoring devices in the communication system according to the embodiment of the present invention. FIG. 15 shows the format of the radio packet transmitted by the specified low power radio communication of 920 MHz.

With reference to FIG. 15, the radio packet includes a radio header and a routing packet stored in the payload.

The wireless header is a header used for specific low power wireless communication. The routing packet has the same contents as the routing packet shown in FIG.

[Operation flow]
Each device in the communication system 301 includes a computer including a memory, and an arithmetic processing unit such as a CPU in the computer reads a program including a part or all of each step of the following sequence diagram or flowchart from the memory. Run. The programs of these plurality of devices can be installed from the outside. The programs of these plurality of devices are distributed in a state of being stored in a recording medium.

FIG. 16 is a diagram showing an example of a sequence of information transmission in the communication system according to the embodiment of the present invention.

In FIG. 16, eight transmission examples 1 to 8 of packets in the higher-level device 181 and the monitoring system T1, that is, between the higher-level device 181, the collecting device 151, the monitoring parent device 102, and the two monitor device devices 103_1 and 103_2 are the same. An example of execution in order is shown.

In the transmission example 1 for transmitting information in the downlink direction, the host device 181 transmits an IP packet including the setting information of the collection device 151 to the collection device 151.

This IP packet contains "0x0001" as the destination PAN_ID, "192.168.1.3" as the destination IP address, and "192.168.1.2" as the source IP address, and transmits. The destination short address includes "0xFFFD", and the source short address includes "0xFFFE". This IP packet does not include the source PAN_ID.

Next, the collecting device 151 receives the IP packet from the host device 181 and processes it.

In the transmission example 2 for transmitting information in the upstream direction, the collection device 151 transmits an IP packet including measurement information and the like to the host device 181.

This IP packet contains "0x0001" as the source PAN_ID, "192.168.1.2" as the destination IP address, and "192.168.1.3" as the source IP address, and transmits. The destination short address includes "0xFFFE", and the source short address includes "0xFFFD". This IP packet does not include the destination PAN_ID.

Next, the host device 181 receives the IP packet from the collecting device 151 and processes it.

In the transmission example 3 for transmitting information in the downlink direction, the host device 181 transmits an IP packet including the setting information of the monitoring parent device 102 to the collecting device 151.

This IP packet contains "0x0001" as the destination PAN_ID, "192.168.1.3" as the destination IP address, and "192.168.1.2" as the source IP address, and transmits. The destination short address includes "0x0000", and the source short address includes "0xFFFE". This IP packet does not include the source PAN_ID.

Next, when the collecting device 151 receives the IP packet from the host device 181, the collecting device 151 deletes the TCP / IP header of the received IP packet, creates a serial packet by adding the serial header, and monitors the created serial packet. It is transmitted to the parent device 102.

This serial packet includes "0x0001" as the destination PAN_ID, "0x0000" as the destination short address, and "0xFFFE" as the source short address. This serial packet does not include the source PAN_ID.

Next, the monitoring parent device 102 receives the serial packet from the collecting device 151 and processes it.

In the transmission example 4 for transmitting information in the upstream direction, the monitoring parent device 102 transmits a serial packet including measurement information and the like to the collecting device 151.

This serial packet includes "0x0001" as the source PAN_ID, "0xFFFE" as the destination short address, and "0x0000" as the source short address. This serial packet does not include the destination PAN_ID.

Next, when the collecting device 151 receives the serial packet from the monitoring parent device 102, the collecting device 151 deletes the serial header of the received serial packet, creates an IP packet by adding a TCP / IP header, and creates the created IP packet. It is transmitted to the host device 181.

This IP packet includes "0x0001" as the source PAN_ID, "0xFFFE" as the destination short address, and "0x0000" as the source short address. This IP packet does not include the destination PAN_ID.

Next, the host device 181 receives the IP packet from the collecting device 151 and processes it.

In the transmission example 5 for transmitting information in the downlink direction, the host device 181 transmits an IP packet including the setting information of the monitor device 103_2 to the collection device 151.

This IP packet contains "0x0001" as the destination PAN_ID, "192.168.1.3" as the destination IP address, and "192.168.1.2" as the source IP address, and transmits. "0x0002" is included as the destination short address, and "0xFFFE" is included as the source short address. This IP packet does not include the source PAN_ID.

Next, when the collecting device 151 receives the IP packet from the host device 181, the collecting device 151 deletes the TCP / IP header of the received IP packet, creates a serial packet by adding the serial header, and monitors the created serial packet. It is transmitted to the parent device 102.

This serial packet includes "0x0001" as the destination PAN_ID, "0x0002" as the destination short address, and "0xFFFE" as the source short address. This serial packet does not include the source PAN_ID.

Next, when the monitoring parent device 102 receives the serial packet from the collecting device 151, the monitoring parent device 102 deletes the serial header of the received serial packet, creates a wireless packet by adding the wireless header, and monitors the created wireless packet. It is transmitted to the device 103_1.

This radio packet contains "0x0001" as the destination PAN_ID, "0x0001" as the destination radio address, "0x0000" as the source radio address, "0x0002" as the destination short address, and the source. Includes "0xFFFE" as the short address. This radio packet does not include the source PAN_ID.

Next, when the monitor child device 103_1 receives the radio packet from the monitoring parent device 102, the monitor child device 103_1 creates and creates a new radio packet by deleting the radio header of the received radio packet and adding a new radio header. The wireless packet is transmitted to the monitor device 103_2.

This radio packet includes "0x0001" as the destination PAN_ID, "0x0002" as the destination radio address, "0x0001" as the source radio address, "0x0002" as the destination short address, and the source. Includes "0xFFFE" as the short address. This radio packet does not include the source PAN_ID.

Next, the monitor device 103_2 receives and processes the wireless packet from the monitor device 103_1.

In transmission example 6 for transmitting information in the upstream direction, the monitor device 103_2 transmits a wireless packet including measurement information and the like to the monitor device 103_1.

This radio packet includes "0x0001" as the source PAN_ID, "0x0001" as the destination radio address, "0x0002" as the source radio address, "0xFFFE" as the destination short address, and the source. Includes "0x0002" as the short address. This radio packet does not include the destination PAN_ID.

Next, when the monitor device 103_1 receives the radio packet from the monitor device 103_2, the monitor device 103_1 creates and creates a new radio packet by deleting the radio header of the received radio packet and adding a new radio header. The wireless packet is transmitted to the monitoring parent device 102.

This radio packet contains "0x0001" as the source PAN_ID, "0x0000" as the destination radio address, "0x0001" as the source radio address, "0xFFFE" as the destination short address, and the source. Includes "0x0002" as the short address. This radio packet does not include the destination PAN_ID.

Next, when the monitoring parent device 102 receives the wireless packet from the monitoring child device 103_1, the monitoring parent device 102 deletes the wireless header of the received wireless packet, creates a serial packet by adding the serial header, and collects the created serial packet. It transmits to the device 151.

This serial packet includes "0x0001" as the source PAN_ID, "0xFFFE" as the destination short address, and "0x0002" as the source short address. This serial packet does not include the destination PAN_ID.

Next, when the collecting device 151 receives the serial packet from the monitoring parent device 102, the collecting device 151 deletes the serial header of the received serial packet, creates an IP packet by adding a TCP / IP header, and creates the created IP packet. It is transmitted to the host device 181.

This IP packet contains "0x0001" as the source PAN_ID, "192.168.1.2" as the destination IP address, and "192.168.1.3" as the source IP address, and transmits. "0xFFFE" is included as the destination short address, and "0x0002" is included as the source short address. This IP packet does not include the destination PAN_ID.

Next, the host device 181 receives the IP packet from the collecting device 151 and processes it.

In the transmission example 7 for transmitting information in the downlink direction, the monitoring parent device 102 transmits a wireless packet including information for setting or the like to the monitoring child device 103_1 to the monitoring child device 103_1.

This radio packet contains "0x0001" as the destination PAN_ID, "0x0001" as the source PAN_ID, "0x0001" as the destination radio address, "0x0000" as the source radio address, and the destination short. The address includes "0x0002" and the source short address includes "0x0000".

Next, when the monitor child device 103_1 receives the radio packet from the monitoring parent device 102, the monitor child device 103_1 creates and creates a new radio packet by deleting the radio header of the received radio packet and adding a new radio header. The wireless packet is transmitted to the monitor device 103_2.

This radio packet contains "0x0001" as the destination PAN_ID, "0x0001" as the source PAN_ID, "0x0002" as the destination radio address, "0x0001" as the source radio address, and the destination short. The address includes "0x0002" and the source short address includes "0x0000".

Next, the monitor device 103_2 receives and processes the wireless packet from the monitor device 103_1.

In transmission example 8 for transmitting information in the upstream direction, the monitor device 103_2 transmits a radio packet including information such as measurement information to the monitor device 103_1.

This radio packet contains "0x0001" as the destination PAN_ID, "0x0001" as the source PAN_ID, "0x0001" as the destination radio address, "0x0002" as the source radio address, and the destination short. The address includes "0x0000" and the source short address includes "0x0002".

Next, when the monitor device 103_1 receives the radio packet from the monitor device 103_2, the monitor device 103_1 deletes the radio header of the received radio packet and adds a new radio header to create and create a new radio packet. The wireless packet is transmitted to the monitoring parent device 102.

This radio packet contains "0x0001" as the destination PAN_ID, "0x0001" as the source PAN_ID, "0x0000" as the destination radio address, "0x0001" as the source radio address, and the destination short. The address includes "0x0000" and the source short address includes "0x0002".

Next, the monitoring parent device 102 receives and processes the wireless packet from the monitoring child device 103_1.

In the communication system 301, the packet transmitted between the devices includes the PAN_ID. As a result, for example, in the work of attaching the monitoring device 101 to the steel tower 2, even if the monitoring device 101 having an erroneous PAN_ID is attached, for example, the host device 181 can recognize the error. The communication system 301 may have a configuration in which the packet transmitted between the devices does not include the PAN_ID.

Further, in the communication system according to the embodiment of the present invention, the monitoring device 101 is configured to include the sensor 111, but the present invention is not limited to this. The sensor 111 may be provided outside the monitoring device 101.

In this case, the sensor 111 transmits information indicating the measurement result to the monitoring device 101 by wire communication or wireless communication.

Further, in the communication system according to the embodiment of the present invention, a part of the monitoring devices 101 among the plurality of monitoring devices 101 may be provided with the sensor 111.

For example, a part of the monitoring devices 101 among the plurality of monitoring devices 101 may be provided with the sensor 111, and the other monitoring device 101 may not be provided with the sensor 111. In this case, the sensor 111 may be provided outside the monitoring device 101 that does not have the sensor 111, and the sensor 111 may transmit measurement information indicating the measurement result to the monitoring device 101.

Further, the monitoring device 101 without the sensor 111 may be configured to transfer information from another monitoring device 101 to another monitoring device 101 without serving as a source of information.

Further, even in a configuration in which either the transfer of the wireless packet in the upstream direction or the transfer of the wireless packet in the downstream direction is performed between the plurality of monitoring devices 101 in the communication system according to the embodiment of the present invention. good.

By the way, in the network system described in Patent Document 1, while communication is performed between radio stations and between radio stations and master stations by, for example, a 2.4 GHz band specific low power radio, between master stations and higher host stations. In, communication is performed by a mobile phone line or the like.

Therefore, the communication protocol used between the radio stations and between the radio station and the master station is different from the communication protocol used between the master station and the upper host station. When communication is performed between devices having different communication protocols, for example, a method 1 in which an address table for converting an address used in each communication protocol is provided in each of a higher-level host station and a master station, and a radio station. A method 2 is conceivable in which the communication protocol used between the radio station and the master station is matched with the communication protocol used between the master station and the host station.

However, when method 1 is adopted, in addition to the need for address conversion processing, when updating the address table for maintenance purposes, etc., if the updates are not consistent between the address tables, communication problems will occur. May occur.

Further, when the method 2 is adopted, the data size of the header of the communication between the radio stations and between the radio station and the master station becomes large, and the transmission amount increases.

On the other hand, in the communication system according to the embodiment of the present invention, the upper device 181 collects the first list information of the IP address used in the first lower layer in the communication between the upper device 181 and the collecting device 151. It holds the second list information of short addresses used in the second lower layer in the communication between the device 151 and the monitoring parent device 102, and between the monitoring parent device 102 and the monitoring child device 103. Then, different short addresses are fixedly assigned to the monitoring parent device 102, the monitoring child device 103, the collecting device 151, and the host device 181. The plurality of monitoring devices 101, the collecting device 151, and the host device 181 send and receive packets in which short addresses are stored as source addresses and destination addresses.

As described above, the first list information of the IP address used in the lower layer of the communication between the upper device 181 and the collection device 151 and the second short address used in the lower layer of the communication between the collection device 151 and the monitoring device 101 Due to the configuration in which the host device 181 holds the list information and different short addresses are fixedly assigned to the plurality of monitoring devices 101, the collecting device 151, and the host device 181. Differences in lower layers between the layers and the collection device 151 and the monitoring device 101 can be absorbed by short addresses. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device 181 and the collection device 151. Therefore, it is not necessary for the higher-level device 181 and the collection device 151 to perform the address conversion process, and it is not necessary to match the update of the address table between the higher-level device 181 and the collection device 151.

Therefore, in the communication system according to the embodiment of the present invention, more stable operation can be realized in the power system.

Further, the communication system according to the embodiment of the present invention includes a plurality of sets of a collecting device 151 and a plurality of monitoring devices 101, that is, a plurality of monitoring systems T. A different PAN_ID is fixedly assigned to each monitoring system T. The first list information shows the correspondence between the PAN_ID and the IP address, and the second list information shows the correspondence between the PAN_ID and the short address. The PAN_ID is further stored in the packet.

With such a configuration, the communication system 301 including the plurality of monitoring systems T each composed of the collecting device 151 and the plurality of monitoring devices 101 and the host device 181 can be operated more stably.

Further, the higher-level device according to the embodiment of the present invention includes first list information of IP addresses used in the first lower layer in communication between the higher-level device 181 and the collecting device 151, and between the collecting device 151 and the monitoring parent device 102. , And the second list information of the short address used in the second lower layer in the communication between the monitoring parent device 102 and the monitoring child device 103. Then, different short addresses are fixedly assigned to the monitoring parent device 102, the monitoring child device 103, the collecting device 151, and the host device 181. The host device 181 transmits and receives a packet in which a short address is stored as a source address and a destination address to and from a plurality of monitoring devices 101 and a collection device 151.

As described above, the first list information of the IP address used in the lower layer of the communication between the upper device 181 and the collection device 151 and the second short address used in the lower layer of the communication between the collection device 151 and the monitoring device 101 Due to the configuration in which the host device 181 holds the list information and different short addresses are fixedly assigned to the plurality of monitoring devices 101, the collecting device 151, and the host device 181. Differences in lower layers between the layers and the collection device 151 and the monitoring device 101 can be absorbed by short addresses. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device 181 and the collection device 151. Therefore, it is not necessary for the higher-level device 181 and the collection device 151 to perform the address conversion process, and it is not necessary to match the update of the address table between the higher-level device 181 and the collection device 151.

Therefore, the higher-level device according to the embodiment of the present invention can realize more stable operation in the power system.

Further, the collecting device according to the embodiment of the present invention includes the first list information of the IP address used in the first lower layer in the communication between the upper device 181 and the collecting device 151, and between the collecting device 151 and the monitoring parent device 102. , And the second list information of the short address used in the second lower layer in the communication between the monitoring parent device 102 and the monitoring child device 103. Then, different short addresses are fixedly assigned to the monitoring parent device 102, the monitoring child device 103, the collecting device 151, and the host device 181. The collection device 151 transmits / receives a packet in which a short address is stored as a source address and a destination address to / from a plurality of monitoring devices 101 and a higher-level device 181.

As described above, the first list information of the IP address used in the lower layer of the communication between the upper device 181 and the collection device 151 and the second short address used in the lower layer of the communication between the collection device 151 and the monitoring device 101 Due to the configuration in which the collection device 151 holds the list information and different short addresses are fixedly assigned to the plurality of monitoring devices 101, the collection device 151, and the host device 181. Differences in lower layers between the layers and the collection device 151 and the monitoring device 101 can be absorbed by short addresses. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device 181 and the collection device 151. Therefore, it is not necessary for the higher-level device 181 and the collection device 151 to perform the address conversion process, and it is not necessary to match the update of the address table between the higher-level device 181 and the collection device 151.

Therefore, in the collecting device according to the embodiment of the present invention, more stable operation can be realized in the power system.

Further, in the communication method according to the embodiment of the present invention, the upper device 181 is the first list information of the IP address used in the communication between the upper device 181 and the collection device 151, the collection device 151, and the collection device 151. It holds the second list information of the short address used in the second lower layer in the communication between the monitoring parent device 102 and between the monitoring parent device 102 and the monitoring child device 103. Further, different short addresses are fixedly assigned to the monitoring parent device 102, the monitoring child device 103, the collecting device 151, and the host device 181. In the above communication method, first, the monitoring device 101, the collecting device 151, or the host device 181 transmits a packet in which a short address is stored as a source address and a destination address. Next, the monitoring device 101, the collecting device 151, or the host device 181 receives the packet.

In this way, the upper device 181 holds the first list information of the IP addresses used in the first lower layer and the second list information of the short addresses used in the second lower layer, and the plurality of monitoring devices Due to the configuration in which different short addresses are fixedly assigned to 101, the collecting device 151 and the upper device 181 respectively, the difference between the lower layer between the upper device 181 and the collecting device 151 and the lower layer between the collecting device 151 and the monitoring device 101 is shorted. It can be absorbed by the address. This eliminates the need for an address table for translating addresses used in each communication protocol in the host device 181 and the collection device 151. Therefore, it is not necessary for the higher-level device 181 and the collection device 151 to perform the address conversion process, and it is not necessary to match the update of the address table between the higher-level device 181 and the collection device 151.

Therefore, the communication method according to the embodiment of the present invention can realize more stable operation in the power system.

It should be considered that the above embodiments are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended that all modifications within the meaning and scope equivalent to the scope of claims are included.

The above description includes the features described below.
[Appendix 1]
A communication system used in the power system
Multiple monitoring devices that transfer information,
A collecting device that acquires the measurement information transferred by the monitoring device, and
It is equipped with a higher-level device capable of communicating with the collecting device.
The first lower layer, which is a lower layer in the communication between the upper device and the collecting device, and the second lower layer, which is the lower layer in the communication between the collecting device and the monitoring device, are different.
The upper device holds the first list information of the first terminal identifier used in the first lower layer and the second list information of the second terminal identifier used in the second lower layer.
Different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device.
The plurality of monitoring devices, the collecting device, and the host device send and receive packets in which the second terminal identifier is stored as a source address and a destination address.
The second list information is a communication system that further indicates the correspondence between the installation location of the steel tower and the network identifier.

2 Steel tower 3 Overhead ground wire 4 Transmission line 101 Monitoring device 102 Monitoring parent device 103, 103_1, 103_2 Monitor child device 104, 105 Communication unit 106 Battery 107 Control unit 108 Storage unit 111 Sensor 151 Collection device 181 Upper device 301 Communication system T, T1, T2 monitoring system TL1, SL1 1st list information TL2, SL2 2nd list information

Claims (5)

A communication system used in the power system
Multiple monitoring devices that transfer information,
A collecting device that acquires the information transferred by the monitoring device, and
It is equipped with a higher-level device capable of communicating with the collecting device.
The first lower layer, which is a lower layer in the communication between the upper device and the collecting device, and the second lower layer, which is the lower layer in the communication between the collecting device and the monitoring device, are different.
The upper device holds the first list information of the first terminal identifier used in the first lower layer and the second list information of the second terminal identifier used in the second lower layer.
Different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device.
A communication system in which the plurality of monitoring devices, the collecting device, and the host device send and receive packets in which the second terminal identifier is stored as a source address and a destination address. The communication system includes a plurality of sets of the collecting device and the plurality of monitoring devices.
A different network identifier is fixedly assigned to each of the above sets.
The first list information indicates a correspondence relationship between the network identifier and the first terminal identifier.
The second list information indicates the correspondence between the network identifier and the second terminal identifier.
The communication system according to claim 1, wherein the network identifier is further stored in the packet. It is a higher-level device in the communication system used in the power system.
The communication system includes a plurality of monitoring devices for transferring information, a collecting device for acquiring the information transferred by the monitoring device, and the higher-level device capable of communicating with the collecting device.
The first lower layer, which is a lower layer in the communication between the upper device and the collecting device, and the second lower layer, which is the lower layer in the communication between the collecting device and the monitoring device, are different.
The upper device holds the first list information of the first terminal identifier used in the first lower layer and the second list information of the second terminal identifier used in the second lower layer.
Different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device.
The higher-level device is a higher-level device that transmits / receives a packet in which the second terminal identifier is stored as a source address and a destination address between the plurality of monitoring devices and the collection device. A collector in a communication system used in an electric power system.
The communication system includes a plurality of monitoring devices for transferring information, a collecting device for acquiring the information transferred by the monitoring device, and a host device capable of communicating with the collecting device.
The first lower layer, which is a lower layer in the communication between the upper device and the collecting device, and the second lower layer, which is the lower layer in the communication between the collecting device and the monitoring device, are different.
The collecting device holds the first list information of the first terminal identifier used in the first lower layer and the second list information of the second terminal identifier used in the second lower layer.
Different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device.
The collecting device is a collecting device that transmits / receives a packet in which the second terminal identifier is stored as a source address and a destination address between the plurality of monitoring devices and the host device. A communication method in a communication system used in an electric power system.
The communication system includes a plurality of monitoring devices for transferring information, a collecting device for acquiring the information transferred by the monitoring device, and a host device capable of communicating with the collecting device.
The first lower layer, which is a lower layer in the communication between the upper device and the collecting device, and the second lower layer, which is the lower layer in the communication between the collecting device and the monitoring device, are different.
The upper device holds the first list information of the first terminal identifier used in the first lower layer and the second list information of the second terminal identifier used in the second lower layer.
Different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the higher-level device.
A step in which the monitoring device, the collecting device, or the higher-level device transmits a packet in which the second terminal identifier is stored as a source address and a destination address.
A communication method comprising the step of receiving the transmitted packet by the monitoring device, the collecting device, or the host device.

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