JP7279719B2 - Communication system, host device, collection device and communication method - Google Patents

Description

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

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

That is, the network system includes a radio station installed in each tower of a tower row on which transmission lines are installed, and a master station connectable to an external communication line to at least one of the radio stations. information can be sequentially relayed bi-directionally from the radio station to the master station or from the master station to the radio station along the tower train by a first communication memory for storing the sent information; and a second communication memory for storing the information sent from the other side of the tower train, wherein the first communication In a power transmission tower maintenance information wireless network system that relays the information stored in the second communication memory to the other side and relays the information stored in the second communication memory to the one side, the radio station has An identification number is assigned individually, and the radio station that is the source of the information transmits the information with the identification number of its own station attached, and the master station transmits the identification number of the radio station. It has an identification number conversion table that associates the numbers with the tower numbers assigned to the towers on which the radio stations are installed. A plurality of tower numbers corresponding to each transmission line are assigned to the tower, and the master station converts the identification number of the radio station that transmitted the information to each of the transmission lines based on the identification number conversion table. is converted into a plurality of tower numbers corresponding to . A parent station communicates with a higher-level host station via an external communication line such as a mobile phone line.

Japanese Patent No. 6046480

(1) A communication system of the present disclosure is a communication system used in a power system, comprising a plurality of monitoring devices that transfer information, a collecting device that acquires the information transferred by the monitoring devices, and the collecting device a first lower layer that is a lower layer in communication between the upper device and the collecting device; and a second lower layer that is a lower layer in communication between the collecting device and the monitoring device. layer, the upper device holds first list information of first terminal identifiers used in the first lower layer and second list information of second terminal identifiers used in the second lower layer. 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 each have a transmission source address and transmits/receives a packet in which the second terminal identifier is stored as a destination address.

(3) A 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 includes a plurality of monitoring devices that transfer information, and acquires the information transferred by the monitoring devices. and the higher-level device capable of communicating with the higher-level device, wherein a first lower layer, which is a lower layer in communication between the higher-level device and the collecting device, and between the collecting device and the monitoring device Unlike the second lower layer, which is a lower layer in communication, the upper device includes first list information of first terminal identifiers used in the first lower layer and first list information of first terminal identifiers used in the second lower layer. holding second list information of two terminal identifiers, wherein different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device and the host device, and the host device has a transmission source address; and packets in which the second terminal identifier is stored as a destination address are transmitted and received between the plurality of monitoring devices and the collecting device.

(4) A collection device of the present disclosure is a collection device in a communication system used in a power system, wherein the communication system includes a plurality of monitoring devices that transfer information and acquires the information transferred by the monitoring devices. and a higher-level device capable of communicating with the collecting device, wherein a first lower layer, which is a lower layer in communication between the higher-level device and the collecting device, and between the collecting device and the monitoring device Different from the second lower layer, which is a lower layer in communication, the collection device includes a first list information of first terminal identifiers used in the first lower layer and a first list information of first terminal identifiers used in the second lower layer. holding second list information of two terminal identifiers, wherein different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collection device, and the host device, and the collection device receives a transmission 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 host device.

(5) A communication method of the present disclosure is a communication method in a communication system used in a power system, wherein the communication system includes a plurality of monitoring devices that transfer information, and acquires the information transferred by the monitoring devices. and a higher-level device capable of communicating with the collecting device, wherein communication between a first lower layer, which is a lower layer in communication between the higher-level device and the collecting device, and the collecting device and the monitoring device Unlike the second lower layer, which is the lower layer in the upper device, the upper device includes 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 A second list information of terminal identifiers is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collection device, and the host device, and the monitoring device, the collection device, or the a step of a host device transmitting a packet in which the second terminal identifier is stored as a source address and a destination address; and a step of the monitoring device, the collecting device or the host device receiving the transmitted packet. including.

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

In addition, one aspect of the present disclosure can be realized not only as a host device having such a characteristic processing unit, but also as a method having such characteristic processing as steps, or as a method in which such steps are executed by a computer. It can be implemented as a program for execution. Also, one aspect of the present disclosure can be implemented as a semiconductor integrated circuit that implements part or all of a higher-level device.

In addition, one aspect of the present disclosure can be realized not only as a collection device having such a characteristic processing unit, but also as a method having steps of such characteristic processing, or as a method in which such steps are executed by a computer. It can be implemented as a program for execution. Also, one aspect of the present disclosure can be implemented as a semiconductor integrated circuit that implements part or all of the collection device.

FIG. 1 is a diagram showing the configuration of a communication system according to an embodiment of the 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 the configuration of the monitoring master device in the communication system according to the embodiment of the invention. FIG. 4 is a block diagram showing the configuration of the supervisory device in the communication system according to the embodiment of the invention. FIG. 5 is a diagram showing an example of address allocation in the communication system according to the embodiment of the 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 invention. FIG. 7 is a diagram showing an example of second list information held by a 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 collection device in the communication system according to the embodiment of the invention. FIG. 9 is a diagram showing an example of first list information held by the collection device in the communication system according to the embodiment of the invention. FIG. 10 is a diagram showing an example of second list information held by the collection device in the communication system according to the embodiment of the present invention. FIG. 11 is a diagram showing an example of second list information held by the collection device in the communication system according to the embodiment of the present invention. FIG. 12 is a diagram showing an example of essential parts of a packet in the communication system according to the embodiment of the invention. FIG. 13 is a diagram showing an example of packets used between a host device and a collection device in the communication system according to the embodiment of the invention. FIG. 14 is a diagram showing an example of packets used between the collection device and the wireless master device 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 an information transmission sequence in the communication system according to the embodiment of the present invention.

[Problems to be Solved by the Present Disclosure]
In the network system described in Patent Document 1, communication is performed between radio stations and between a radio station and a master station by a specified low-power radio in the 2.4 GHz band, for example. Communication is performed through a telephone line or the like.

Therefore, the communication protocol used between radio stations and between a radio station and a master station differs from the communication protocol used between a master station and an upper host station. When communication is performed between devices using different communication protocols, for example, an address table for converting addresses used in each communication protocol may be provided in each of the upper host station and the parent station.

However, in such a configuration, in addition to the need for address conversion processing, when the address tables are updated for maintenance purposes, etc., if the updates are not consistent among the address tables, communication problems may occur. There is a risk that it will occur.

The present disclosure has been made to solve the above problems, and its object is to provide a communication system, a host device, a collection device, and a communication method that can realize more stable operation in a power system. That is.

[Effect of the present disclosure]
According to the present disclosure, it is possible to realize more stable operation in a power system.

[Description of Embodiments of the Present Invention]
First, the contents of the embodiments of the present invention will be listed and explained.

(1) A communication system according to an embodiment of the present invention is a communication system used in a power system, comprising a plurality of monitoring devices that transfer information, and a collecting device that acquires the information transferred by the monitoring devices. and a higher-level device capable of communicating with the collecting device, wherein a first lower layer is a lower layer in communication between the higher-level device and the collecting device and a lower layer in communication between the collecting device and the monitoring device Unlike a certain second lower layer, the higher-level device includes first list information of first terminal identifiers used in the first lower layer and first list information of second terminal identifiers used in the second lower layer. 2 list information is held, and different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device and the upper device, and the plurality of monitoring devices, the collecting device and the higher device transmits and receives a packet in which the second terminal identifier is stored as a source address and a destination address.

In this way, the first list information of the first terminal identifier used in the lower layer of communication between the host device and the collecting device and the second list information of the second terminal identifier used in the lower layer of communication between the collecting device and the monitoring device List information is held by the host device, and different second terminal identifiers are fixedly assigned to a plurality of monitoring devices, collection devices, and host devices. and lower layer differences between monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for converting addresses used in each communication protocol in the host device and collection device. Therefore, there is no need to perform address translation processing in the host device and the collection device, and matching of address table updates between the host device and the collection device becomes unnecessary. Therefore, more stable operation can be realized in the power system.

(2) Preferably, the communication system includes a plurality of sets of the collection device and the plurality of monitoring devices, each set is fixedly assigned a different network identifier, and the first list information includes the The correspondence relationship between the network identifier and the first terminal identifier is indicated, the second list information indicates the correspondence relationship 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) A host device according to an embodiment of the present invention is a host device in a communication system used in a power system, and the communication system includes a plurality of monitoring devices that transfer information, and information transferred by the monitoring devices. a collection device for acquiring said information; and said upper device capable of communicating with said collection device; Unlike the second lower layer, which is a lower layer in communication between the monitoring devices, the upper device includes first list information of first terminal identifiers used in the first lower layer, and the second lower layer. holding second list information of second terminal identifiers used in layers, wherein different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the upper device; transmits/receives a packet in which the second terminal identifier is stored as a source address and a destination address to/from the plurality of monitoring devices and the collection device.

In this way, the first list information of the first terminal identifier used in the lower layer of communication between the host device and the collecting device and the second list information of the second terminal identifier used in the lower layer of communication between the collecting device and the monitoring device List information is held by the host device, and different second terminal identifiers are fixedly assigned to a plurality of monitoring devices, collection devices, and host devices. and lower layer differences between monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for converting addresses used in each communication protocol in the host device and collection device. Therefore, there is no need to perform address translation processing in the host device and the collection device, and matching of address table updates between the host device and the collection device becomes unnecessary. Therefore, more stable operation can be realized in the power system.

(4) A collection device according to an embodiment of the present invention is a collection device in a communication system used in a power system, wherein the communication system includes a plurality of monitoring devices that transfer information, and and a higher-level device capable of communicating with the collecting device, wherein a first lower layer, which is a lower layer in communication between the higher-level device and the collecting device, the collecting device and Unlike the second lower layer, which is a lower layer in communication between the monitoring devices, the collection device includes first list information of first terminal identifiers used in the first lower layer, and the second lower layer. holding second list information of second terminal identifiers used in a layer, wherein different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the upper device; and the collecting device transmits/receives a packet in which the second terminal identifier is stored as a source address and a destination address to/from the plurality of monitoring devices and the host device.

In this way, the first list information of the first terminal identifier used in the lower layer of communication between the host device and the collecting device and the second list information of the second terminal identifier used in the lower layer of communication between the collecting device and the monitoring device List information is held by the collecting device, and different second terminal identifiers are fixedly assigned to a plurality of monitoring devices, collecting devices, and higher-level devices. and lower layer differences between monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for converting addresses used in each communication protocol in the host device and collection device. Therefore, there is no need to perform address translation processing in the host device and the collection device, and matching of address table updates between the host device and the collection device becomes unnecessary. Therefore, more stable operation can be realized in the power system.

(5) A communication method according to an embodiment of the present invention is a communication method in a communication system used in a power system, wherein the communication system includes a plurality of monitoring devices that transfer information, and information transferred by the monitoring devices. and a higher-level device capable of communicating with the higher-level device, wherein a first lower layer, which is a lower layer in communication between the higher-level device and the collecting device, the collecting device and the Unlike the second lower layer, which is a lower layer in communication between monitoring devices, the upper device includes first list information of first terminal identifiers used in the first lower layer and the second lower layer holding second list information of second terminal identifiers used in the above, wherein different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the host device, and the monitoring device, a step in which the collecting device or the upper device transmits a packet in which the second terminal identifier is stored as a source address and a destination address; and receiving the packet.

In this way, the first list information of the first terminal identifier used in the lower layer of communication between the host device and the collecting device and the second list information of the second terminal identifier used in the lower layer of communication between the collecting device and the monitoring device List information is held by the host device, and different second terminal identifiers are fixedly assigned to a plurality of monitoring devices, collection devices, and host devices. and lower layer differences between monitoring devices can be absorbed by the second terminal identifier. This eliminates the need for an address table for converting addresses used in each communication protocol in the host device and collection device. Therefore, there is no need to perform address translation processing in the host device and the collection device, and matching of address table updates between the host device and the collection device becomes unnecessary. Therefore, more stable operation can be realized in the power system.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated. Moreover, at least part of the embodiments described below may be combined arbitrarily.

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

Referring to FIG. 1, communication system 301 is a communication system used in a power system. Specifically, the communication system 301 is, for example, a communication system installed together with a power transmission facility installed between a power plant and an electric power consumer, and for example, detects a lightning strike position on the power transmission facility, It is used for temperature monitoring and maintenance of power transmission equipment.

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

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

Specifically, the monitoring device 101, for example, transmits information received by itself from another monitoring device 101 to another monitoring device 101 different from the other monitoring device 101 as "transfer". to other monitoring devices 101 .

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

The types of the monitoring device 101 include a monitoring parent device 102 having a parent device function and a monitoring child device 103 having a child device function and performing wireless communication with the monitoring parent device 102 . A monitoring parent device 102 and a 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 serially transmit information via wireless transmission lines, that is, are connected in series via wireless transmission lines. In other words, the communication system 301 does not constitute a transmission line in which a plurality of monitoring devices 101 are arranged in parallel or in a mesh pattern, but constitutes a wireless transmission line in which a plurality of monitoring devices 101 are arranged in series. 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 that can communicate with the collection device 151 . Host device 181 can communicate with collection device 151, for example, via a mobile phone line.

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

Hereinafter, the supervisor device 103 side viewed from the host device 181 may be referred to as the "downstream side", and the host device 181 side viewed from the supervisor device 103 may be referred to as the "upstream side". Also, the direction from the host device 181 to the supervisory device 103 may be called the "downward direction", and the direction from the supervisory device 103 to the host device 181 may be called the "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 master device 102 acquires measurement information indicating the measurement result of its own sensor, and transfers the acquired measurement information to the collection device 151 .

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

The monitoring child device 103 acquires measurement information indicating the measurement result of its own sensor, and transfers the acquired measurement information to another monitoring child device 103 on the upstream side or to the monitoring parent device 102 .

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

Note that when the received information is addressed to itself, the collecting device 151 and the monitoring device 101 process the information without transferring it.

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

Referring to FIG. 2, a plurality of monitoring devices 101 are respectively installed at different positions in the power system, for example, at a plurality of positions capable of detecting information required for maintenance of the power system. Specifically, for example, a plurality of monitoring devices 101 are installed on a plurality of steel towers 2 provided in an electric power system. The overhead ground wire 3 and the transmission line 4 are installed between adjacent steel towers 2 .

Note that the monitoring device 101 may be installed in all the steel towers 2 in the section to be monitored, or may be installed in some of the steel towers 2 in the section to be monitored.

Specifically, the monitoring device 101 may be installed, for example, every other, every two, or every three towers 2 installed side by side. In the example shown in FIG. 2, the monitoring devices 101 are installed alternately. Whether to install the monitoring device 101 on all the steel towers 2 or on some of the steel towers 2 is determined, for example, based on the installation intervals of the steel towers 2 and the like.

Moreover, the monitoring device 101 may be installed not only on the steel tower 2 but also around the steel tower 2, or may be installed, for example, on the power transmission line 4, the overhead ground wire 3, or on the ground.

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

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

The communication unit 104 transmits measurement information indicating the amount of 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, for example, wired and perform serial communication with each other.

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

The control unit 107 controls operations of the sensor 111, the communication unit 104, and the like. Specifically, for example, control unit 107 periodically performs control to turn on communication unit 104 and turn off communication unit 104 after a predetermined period of time has elapsed.

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

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

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

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

Referring to FIG. 1 again, the collection device 151 transmits the measurement information received from the monitoring parent device 102 to the host device 181 .

The host device 181 receives 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 charge from the plurality of monitoring devices 101 via the collection device 151, and based on the amount of charge indicated by each received measurement information, the distribution of the amount of charge among the plurality of steel towers 2. is calculated, and the position of the lightning strike is estimated based on the calculated charge amount distribution.

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

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

The communication unit 105 transmits measurement information indicating the amount of charge measured by the sensor 111 of its own monitor child device 103 to another monitor child device 103 on the upstream side or the monitoring parent device 102 . Further, when the communication unit 105 receives the measurement information indicating the charge amount from the monitoring child device 103 located downstream, the communication unit 105 transfers the received measurement information to the other monitoring child 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 invention. In the following, a case where the communication system 301 is provided with a supervisory device 103_1 and a supervisory device 103_2, which are the supervisory devices 103, will be described. The supervisory device 103_1 and the supervisory device 103_2 are installed in this order from the upstream side.

Referring to FIG. 5, in communication system 301, a first lower layer that is a lower layer in communication between host device 181 and collection device 151 and a lower layer that is a lower layer in communication between collection device 151 and monitoring device 101 2 lower layer.

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 collection device 151, a communication protocol for mobile phone lines, such as IP, is used as a first lower layer communication protocol.

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 a second lower layer communication protocol 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 devices 103, for example, specified low-power radio communication using the 920 MHz band communication band according to the IEEE802.15.4 communication standard is performed. The communication protocol for the specified low-power wireless communication is used as the communication protocol of the second lower layer between the monitoring parent device 102 and the monitoring child device 103 and between the monitoring child device 103 .

The upper device 181 holds the first terminal identifiers used in the first lower layer, such as the first list information of IP addresses, 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 invention.

Referring to FIG. 6, first list information TL1 indicates the correspondence relationship between the PAN_ID, the IP address of host device 181, and the IP address of collection device 151 for each monitoring system T managed by host device 181. FIG.

In addition, the upper device 181 holds second terminal identifiers used in the second lower layer, for example, second list information of short addresses in a storage unit (not shown).

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

Referring to FIG. 7, the second list information TL2 includes the monitoring system number, the PAN_ID, the short address of the host device 181, the short address of the collection device 151, and the monitoring system number for each monitoring system T managed by the host device 181. The correspondence relationship among the short address and tower number of the monitoring parent device 102, the short address and tower number of the supervisory child device 103_1, and the short address and tower number of the supervisory 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, for example, input the monitoring system number and the tower number to the host device 181 to specify the monitoring device 101 or the like in the desired tower to the host device 181, and acquire various information. can.

The collection device 151 holds, in a storage unit (not shown), first terminal identifiers used in the first lower layer, such as first list information of IP addresses.

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

Referring to FIG. 8, first list information SL1 shows the correspondence relationship among PAN_ID, IP address of host device 181, and IP address of collection device 151 in monitoring system T1.

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

Referring to FIG. 9, first list information SL1 shows the correspondence relationship between PAN_ID, IP address of host device 181, and IP address of collection device 151 in monitoring system T2.

In addition, the collection device 151 holds second terminal identifiers used in the second lower layer, such as second list information of short addresses, in a storage unit (not shown).

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

FIG. 10 is a diagram showing an example of second list information held by the collection 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.

Referring to FIG. 10, second list information SL2 includes the monitoring system number, PAN_ID, short address of host device 181, short address of collecting device 151, and short address of monitoring parent device 102 of monitoring system T1. and the tower number, the short address and tower number of the supervisor device 103_1, and the short address and tower number of the supervisor device 103_2.

FIG. 11 is a diagram showing an example of second list information held by the collection 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.

Referring to FIG. 11, second list information SL2 includes the monitoring system number, PAN_ID, short address of host device 181, short address of collecting device 151, and short address of monitoring parent device 102 of monitoring system T2. and the tower number, the short address and tower number of the supervisor device 103_1, and the short address and tower number of the supervisor device 103_2.

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

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

Different network identifiers such as PAN_ID (Personal Area Network Identification) are fixedly assigned to the monitoring systems T1 and T2, respectively.

In the communication system 301, the monitoring parent device 102, the plurality of monitoring child devices 103, the collection device 151, and the upper device 181 use second terminal identifiers, for example, a source short address and a destination short address as a source address and a destination address. send and receive packets in which each is stored.

FIG. 12 is a diagram showing an example of essential parts of a packet in the communication system according to the embodiment of the invention.

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

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

Packets transmitted between collection device 151 and monitoring parent device 102 include a serial header, a routing header, an application header and an application payload. The serial header and routing header are used for lower layer communication, and the application header and application payload are used for upper layer communication.

While the collection device 151 and monitoring parent device 102 can recognize the contents of the serial header and routing header, they cannot recognize the contents of the application header and application payload.

A 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. The radio header and routing header are used for lower layer communications, and the application header and application payload are used for higher layer communications.

The monitoring parent device 102 and 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 supervisory devices 103 include a radio header, a routing header, an application header and an application payload. The radio header and routing header correspond to lower layers, and the application header and application payload correspond to higher layers.

The supervisor 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 packets used between a host device and a collection device in the communication system according to the embodiment of the invention. FIG. 13 shows the format of an IP packet.

Referring to FIG. 13, an IP packet includes a TCP/IP header and a routing packet stored in payload.

A TCP/IP header includes, for example, a “destination IP address” and a “source IP address”.

A routing packet includes, for example, a routing header and an application packet contained in a payload.

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

An application packet includes, for example, an application header and an application payload.

The application payload contains target information such as measurement information. The target information includes, for example, information used for maintenance of power systems such as power transmission facilities. Specifically, when the monitoring device 101 is installed on the steel tower 2 , the target information includes, for example, measurement information indicating the amount of electric charge used for detecting the lightning strike position on the power transmission equipment, and the temperature information used for monitoring the temperature of the power transmission line 4 . , measurement information indicating the inclination of the steel tower 2, or measurement information indicating the depth of snow on the ground.

Further, 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 electric charge used for detecting the lightning strike position on the power transmission equipment, and the temperature used for monitoring the temperature of the power transmission line 4. measurement information, or measurement information indicating inclination due to slackness of the power transmission line 4 or the like.

Further, when the monitoring device 101 is installed in the overhead ground wire 3, the target information is, for example, measurement information indicating the amount of electric charge used for detecting the lightning strike position to the power transmission equipment, and the temperature monitoring of the overhead ground wire 3. It includes measurement information indicating temperature or measurement information indicating inclination due to slackness of the overhead ground wire 3 or the like.

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

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

FIG. 14 is a diagram showing an example of packets used between the collection device and the 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.

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

A serial header is a header used for serial communication. The routing packet has the same content 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 a radio packet transmitted by 920 MHz specified low-power radio communication.

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

A radio header is a header used for specific low-power radio communication. The routing packet has the same content as the routing packet shown in FIG.

[Flow of operation]
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 out from the memory a program including part or all of each step in the following sequence diagrams or flowcharts. Execute. Programs for these multiple devices can each be installed from the outside. Programs for these devices are stored in recording media and distributed.

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

FIG. 16 shows eight transmission examples 1 to 8 of packets in the host device 181 and the monitoring system T1, that is, between the host device 181, the collection device 151, the supervisory parent device 102, and the two supervisory slave devices 103_1 and 103_2. It shows an example of sequential execution.

In transmission example 1 in which information is transmitted in the downstream direction, the host device 181 transmits an IP packet including 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, "192.168.1.2" as the source IP address, and "0xFFFD" is included as the destination short address, and "0xFFFE" is included as the source short address. This IP packet does not contain the source PAN_ID.

Next, the collection device 151 receives IP packets from the host device 181 and processes them.

In transmission example 2 in which information is transmitted in the upstream direction, the collection device 151 transmits IP packets 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, "192.168.1.3" as the source IP address, and the "0xFFFE" is included as the destination short address, and "0xFFFD" is included as the source short address. This IP packet does not contain the destination PAN_ID.

Next, the host device 181 receives IP packets from the collection device 151 and processes them.

In transmission example 3 in which information is transmitted in the downstream direction, the host device 181 transmits an IP packet including setting information and the like of the monitoring parent device 102 to the collection device 151 .

This IP packet contains "0x0001" as the destination PAN_ID, "192.168.1.3" as the destination IP address, "192.168.1.2" as the source IP address, and "0x0000" is included as the destination short address, and "0xFFFE" is included as the source short address. This IP packet does not contain the source PAN_ID.

Next, when the collection device 151 receives an IP packet from the host device 181, the collection device 151 deletes the TCP/IP header of the received IP packet, adds a serial header to create a serial packet, and monitors the created serial packet. Send to parent device 102 .

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

Monitoring parent device 102 then receives and processes the serial packet from collection device 151 .

In transmission example 4, in which information is transmitted in the upstream direction, the monitoring master device 102 transmits a serial packet including measurement information and the like to the collection 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 contain the destination PAN_ID.

Next, when the collection device 151 receives a serial packet from the monitoring parent device 102, the collection device 151 deletes the serial header of the received serial packet, adds a TCP/IP header to create an IP packet, and converts the created IP packet to It is transmitted to the host device 181 .

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

Next, the host device 181 receives IP packets from the collection device 151 and processes them.

In transmission example 5 in which information is transmitted in the downlink direction, the host device 181 transmits an IP packet including setting information of the supervisory child 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, "192.168.1.2" as the source IP address, and "0x0002" is included as the destination short address, and "0xFFFE" is included as the source short address. This IP packet does not contain the source PAN_ID.

Next, when the collection device 151 receives an IP packet from the host device 181, the collection device 151 deletes the TCP/IP header of the received IP packet, adds a serial header to create a serial packet, and monitors the created serial packet. Send to 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 contain the source PAN_ID.

Next, when the monitoring parent device 102 receives a serial packet from the collection device 151, it deletes the serial header of the received serial packet, adds a wireless header to create a wireless packet, and sends the created wireless packet to the monitoring device 102. Send to the device 103_1.

This wireless packet includes "0x0001" as the destination PAN_ID, "0x0001" as the destination wireless address, "0x0000" as the source wireless address, "0x0002" as the destination short address, and "0x0002" as the destination short address. It contains "0xFFFE" as a short address. This radio packet does not contain the source PAN_ID.

Next, when the monitoring child device 103_1 receives a wireless packet from the monitoring parent device 102, it deletes the wireless header of the received wireless packet and adds a new wireless header to create a new wireless packet. A wireless packet is transmitted to the supervisory slave device 103_2.

This wireless packet includes “0x0001” as the destination PAN_ID, “0x0002” as the destination wireless address, “0x0001” as the source wireless address, “0x0002” as the destination short address, and “0x0002” as the destination short address. It contains "0xFFFE" as a short address. This radio packet does not contain the source PAN_ID.

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

In the transmission example 6 in which information is transmitted in the upstream direction, the supervisory device 103_2 transmits a wireless packet including measurement information and the like to the supervisory device 103_1.

This wireless packet includes “0x0001” as the source PAN_ID, “0x0001” as the destination wireless address, “0x0002” as the source wireless address, “0xFFFE” as the destination short address, and “0xFFFE” as the destination short address. It contains "0x0002" as a short address. This radio packet does not contain the destination PAN_ID.

Next, when the supervisory device 103_1 receives a wireless packet from the supervisory device 103_2, it deletes the wireless header of the received wireless packet and adds a new wireless header to create a new wireless packet. Send the wireless packet to the monitoring parent device 102 .

This wireless packet includes “0x0001” as the source PAN_ID, “0x0000” as the destination wireless address, “0x0001” as the source wireless address, “0xFFFE” as the destination short address, and “0xFFFE” as the destination short address. It contains "0x0002" as a short address. This radio packet does not contain the destination PAN_ID.

Next, when the monitoring parent device 102 receives a wireless packet from the monitoring child device 103_1, it deletes the wireless header of the received wireless packet, adds a serial header to create a serial packet, and collects the created serial packet. Send to 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 contain the destination PAN_ID.

Next, when the collection device 151 receives a serial packet from the monitoring parent device 102, the collection device 151 deletes the serial header of the received serial packet, adds a TCP/IP header to create an IP packet, and converts the created IP packet to 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, "192.168.1.3" as the source IP address, and "0xFFFE" is included as the destination short address, and "0x0002" is included as the source short address. This IP packet does not contain the destination PAN_ID.

Next, the host device 181 receives IP packets from the collection device 151 and processes them.

In transmission example 7 in which information is transmitted in the downward direction, the monitoring parent device 102 transmits a wireless packet including information for setting the monitoring device 103_2 to the monitoring device 103_1.

This wireless packet includes "0x0001" as the destination PAN_ID, "0x0001" as the source PAN_ID, "0x0001" as the destination wireless address, "0x0000" as the source wireless address, and "0x0000" as the source wireless address. It contains "0x0002" as an address and "0x0000" as a source short address.

Next, when the monitoring child device 103_1 receives a wireless packet from the monitoring parent device 102, it deletes the wireless header of the received wireless packet and adds a new wireless header to create a new wireless packet. A wireless packet is transmitted to the supervisory slave device 103_2.

This wireless packet includes “0x0001” as the destination PAN_ID, “0x0001” as the source PAN_ID, “0x0002” as the destination wireless address, “0x0001” as the source wireless address, and “0x0001” as the source short address. It contains "0x0002" as an address and "0x0000" as a source short address.

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

In transmission example 8 in which information is transmitted in the uplink direction, the supervisory device 103_2 transmits a wireless packet including information such as measurement information to the supervisory device 103_1.

This wireless packet includes “0x0001” as the destination PAN_ID, “0x0001” as the source PAN_ID, “0x0001” as the destination wireless address, “0x0002” as the source wireless address, and “0x0002” as the source wireless address. It contains "0x0000" as an address and "0x0002" as a source short address.

Next, when the supervisory device 103_1 receives a wireless packet from the supervisory device 103_2, it deletes the wireless header of the received wireless packet and adds a new wireless header to create a new wireless packet. Send the wireless packet to the monitoring parent device 102 .

This wireless packet includes "0x0001" as the destination PAN_ID, "0x0001" as the source PAN_ID, "0x0000" as the destination wireless address, "0x0001" as the source wireless address, and "0x0001" as the source wireless address. It contains "0x0000" as an address and "0x0002" as a source short address.

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

In the communication system 301, packets transmitted between each device contain PAN_ID. As a result, for example, even if a monitoring device 101 having an incorrect PAN_ID is installed during construction work to install the monitoring device 101 on the steel tower 2, for example, the host device 181 can recognize the error. Note that the communication system 301 may have a configuration in which packets transmitted between devices do not include the PAN_ID.

Also, 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. A configuration in which the sensor 111 is provided outside the monitoring device 101 may be employed.

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

Further, in the communication system according to the embodiment of the present invention, some monitoring devices 101 among the plurality of monitoring devices 101 may be configured to include the sensor 111 .

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

A monitoring device 101 that does not include the sensor 111 may be configured to transfer information from another monitoring device 101 to another monitoring device 101 without being a source of information.

Further, even in a configuration in which either one of uplink wireless packet transfer and downlink wireless packet transfer 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, communication is performed between radio stations and between a radio station and a master station by a specified low-power radio in the 2.4 GHz band, for example. Communication is performed by a mobile phone line or the like.

Therefore, the communication protocol used between radio stations and between a radio station and a master station differs from the communication protocol used between a master station and an upper host station. When communication is performed between devices using different communication protocols, for example, a method 1 in which an address table for converting addresses used in each communication protocol is provided in each of the upper host station and the master station; Method 2 is conceivable, in which the communication protocol used between the wireless station and the master station is adapted to the communication protocol used between the master station and the upper host station.

However, when method 1 is adopted, in addition to the necessity of address conversion processing, when address tables are updated for maintenance purposes or the like, if the updates are not consistent between the address tables, communication will fail. may occur.

Moreover, when Method 2 is adopted, the data size of the header of communication between wireless stations and between a wireless station and a master station becomes large, and the amount of transmission increases.

On the other hand, in the communication system according to the embodiment of the present invention, the upper device 181 includes first list information of IP addresses used in the first lower layer in communication between the higher device 181 and the collection device 151, collection Holds second list information of short addresses used in the second lower layer in communication between the device 151 and the monitoring parent device 102 and between the monitoring parent device 102 and the monitoring child device 103 . Different short addresses are fixedly assigned to the monitoring parent device 102 , the monitoring child device 103 , the collection device 151 and the host device 181 . A plurality of monitoring devices 101, collection devices 151, and high-level devices 181 transmit and receive packets in which short addresses are stored as source addresses and destination addresses.

In this way, the first list information of IP addresses used in the lower layer of communication between the host device 181 and the collection device 151 and the second list information of short addresses used in the lower layer of communication between the collection device 151 and the monitoring device 101 List information is held by the host device 181, and different short addresses are fixedly assigned to the plurality of monitoring devices 101, the collection device 151, and the host device 181. Layers and lower layer differences between collector 151 and monitor 101 can be absorbed by short addresses. As a result, the host device 181 and the collection device 151 do not need an address table for converting addresses used in each communication protocol. Therefore, there is no need to perform address translation processing in the host device 181 and the collection device 151, and matching of update of the address table between the host device 181 and the collection device 151 becomes unnecessary.

Therefore, in the communication system according to the embodiment of the present invention, it is possible to realize more stable operation in the power system.

Further, the communication system according to the embodiment of the present invention includes a plurality of sets of collecting devices 151 and a plurality of monitoring devices 101, that is, a plurality of monitoring systems T. FIG. A different PAN_ID is assigned to each monitoring system T in a fixed manner. The first list information indicates the correspondence between PAN_IDs and IP addresses, and the second list information indicates the correspondence between PAN_IDs and short addresses. A PAN_ID is also stored in the packet.

With such a configuration, it is possible to more stably operate the communication system 301 including a plurality of monitoring systems T, each of which is composed of the collecting device 151 and a plurality of monitoring devices 101, and the host device 181. FIG.

Further, the upper 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 device 181 and the collection device 151, , and second list information of short addresses used in the second lower layer in communication between the monitoring parent device 102 and the monitoring child device 103 . Different short addresses are fixedly assigned to the monitoring parent device 102 , the monitoring child device 103 , the collection device 151 and the host device 181 . The high-level device 181 transmits and receives packets in which short addresses are stored as source and destination addresses to and from the multiple monitoring devices 101 and collection devices 151 .

In this way, the first list information of IP addresses used in the lower layer of communication between the host device 181 and the collection device 151 and the second list information of short addresses used in the lower layer of communication between the collection device 151 and the monitoring device 101 List information is held by the host device 181, and different short addresses are fixedly assigned to the plurality of monitoring devices 101, the collection device 151, and the host device 181. Layers and lower layer differences between collector 151 and monitor 101 can be absorbed by short addresses. As a result, the host device 181 and the collection device 151 do not need an address table for converting addresses used in each communication protocol. Therefore, there is no need to perform address translation processing in the host device 181 and the collection device 151, and matching of update of the address table between the host device 181 and the collection device 151 becomes unnecessary.

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

Further, the collection 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 upper device 181 and the collection device 151, , and second list information of short addresses used in the second lower layer in communication between the monitoring parent device 102 and the monitoring child device 103 . Different short addresses are fixedly assigned to the monitoring parent device 102, the monitoring child device 103, the collection device 151, and the host device 181, respectively. The collection device 151 transmits/receives packets in which short addresses are stored as source addresses and destination addresses to/from a plurality of monitoring devices 101 and higher-level devices 181 .

In this way, the first list information of IP addresses used in the lower layer of communication between the host device 181 and the collection device 151 and the second list information of short addresses used in the lower layer of communication between the collection device 151 and the monitoring device 101 List information is held by the collection device 151, and different short addresses are fixedly assigned to the plurality of monitoring devices 101, the collection device 151, and the host device 181. Layers and lower layer differences between collector 151 and monitor 101 can be absorbed by short addresses. As a result, the host device 181 and the collection device 151 do not need an address table for converting addresses used in each communication protocol. Therefore, there is no need to perform address translation processing in the host device 181 and the collection device 151, and matching of update of the address table between the host device 181 and the collection device 151 becomes unnecessary.

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

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

In this way, the upper device 181 holds the first list information of IP addresses used in the first lower layer and the second list information of short addresses used in the second lower layer, and a plurality of monitoring devices 101, the collecting device 151 and the upper device 181 are each fixedly assigned different short addresses. Can be absorbed by address. As a result, the host device 181 and the collection device 151 do not need an address table for converting addresses used in each communication protocol. Therefore, there is no need to perform address translation processing in the host device 181 and the collection device 151, and matching of update of the address table between the host device 181 and the collection device 151 becomes unnecessary.

Therefore, with the communication method according to the embodiment of the present invention, it is possible to realize more stable operation in the power system.

The above-described embodiments should be considered as illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all changes within the meaning and scope equivalent to the scope of the claims.

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

2 Steel tower 3 Overhead ground wire 4 Power transmission line 101 Monitoring device 102 Monitoring parent device 103, 103_1, 103_2 Monitoring device 104, 105 Communication unit 106 Battery 107 Control unit 108 Storage unit 111 Sensor 151 Collection device 181 Host device 301 Communication system T, T1, T2 Monitoring system TL1, SL1 First list information TL2, SL2 Second list information

Claims (5)

A communication system used in a power system,
a plurality of monitoring devices that perform multi-hop communication and transfer information;
a collection device for obtaining the information transferred by the monitoring device;
A host device capable of communicating with the collection device,
A first lower layer that is a lower layer in communication between the upper device and the collecting device and a second lower layer that is a lower layer in communication between the collecting device and the monitoring device are different,
The upper device and the collecting device provide first list information of first terminal identifiers used in the first lower layer, and identifiers used in communication between the plurality of monitoring devices, the collecting device and the higher device. and holds second list information of second terminal identifiers used in the second lower layer ,
different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the host device;
The plurality of monitoring devices each store the second terminal identifier assigned to itself,
The communication system, wherein the plurality of monitoring devices, the collecting device, and the upper device transmit and receive packets in which the second terminal identifier is stored as a source address and a destination address. The communication system comprises a plurality of sets of the collecting device and the plurality of monitoring devices,
each said set is statically assigned a different network identifier;
the first list information indicates a correspondence relationship between the network identifier and the first terminal identifier;
the second list information indicates a correspondence relationship between the network identifier and the second terminal identifier;
2. The communication system according to claim 1, wherein said network identifier is further stored in said packet. A host device in a communication system used in a power system,
The communication system performs multi-hop communication and includes a plurality of monitoring devices that transfer information, a collecting device that acquires the information transferred by the monitoring devices, and the host device that can communicate with the collecting devices. prepared,
A first lower layer that is a lower layer in communication between the upper device and the collecting device and a second lower layer that is a lower layer in communication between the collecting device and the monitoring device are different,
The upper device is a first list information of a first terminal identifier used in the first lower layer, and an identifier used in communication between the plurality of monitoring devices, the collecting device and the upper device, and Holding 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 host device;
The host device transmits/receives a packet in which the second terminal identifier is stored as a source address and a destination address to/from the plurality of monitoring devices and the collection device. A collection device in a communication system used in a power system,
The communication system performs multi-hop communication and includes a plurality of monitoring devices that transfer information, the collecting device that acquires the information transferred by the monitoring devices, and a host device that can communicate with the collecting devices. prepared,
A first lower layer that is a lower layer in communication between the upper device and the collecting device and a second lower layer that is a lower layer in communication between the collecting device and the monitoring device are different,
The collection device includes first list information of first terminal identifiers used in the first lower layer, and an identifier used in communication between the plurality of monitoring devices, the collection device, and the upper device, and Holding 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 host device;
The collecting device transmits/receives a packet in which the second terminal identifier is stored as a source address and a destination address to/from the plurality of monitoring devices and the host device. A communication method in a communication system used in a power system,
The communication system includes a plurality of monitoring devices that perform multi-hop communication and transfer information, a collecting device that acquires the information transferred by the monitoring devices, and a host device that can communicate with the collecting devices. ,
A first lower layer that is a lower layer in communication between the upper device and the collecting device and a second lower layer that is a lower layer in communication between the collecting device and the monitoring device are different,
The upper device and the collecting device provide first list information of first terminal identifiers used in the first lower layer, and identifiers used in communication between the plurality of monitoring devices, the collecting device and the higher device. and holds second list information of second terminal identifiers used in the second lower layer ,
different second terminal identifiers are fixedly assigned to the plurality of monitoring devices, the collecting device, and the host 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;
and a step of receiving the transmitted packet by the monitoring device, the collecting device, or the upper device.

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