CN112491958A - IEC104 communication agent service method, device and system based on port mapping technology - Google Patents
IEC104 communication agent service method, device and system based on port mapping technology Download PDFInfo
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- CN112491958A CN112491958A CN202011165144.4A CN202011165144A CN112491958A CN 112491958 A CN112491958 A CN 112491958A CN 202011165144 A CN202011165144 A CN 202011165144A CN 112491958 A CN112491958 A CN 112491958A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/59—Network arrangements, protocols or services for addressing or naming using proxies for addressing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/562—Brokering proxy services
Abstract
An IEC104 communication agent service method, device and system based on a port mapping technology are disclosed, the method comprises the steps of receiving a connection request initiated by a terminal agent and establishing connection, receiving IEC communication terminal ID information sent by the terminal agent, establishing a corresponding relation between the IEC communication terminal ID information and virtual IP information, generating a port mapping table, receiving the connection request initiated by an IEC master station, wherein the connection request comprises the virtual IP information corresponding to an IEC communication terminal to be communicated, which is determined by the IEC master station according to the port mapping table; and establishing a communication channel between the IEC master station and the master station agent according to the virtual IP information corresponding to the IEC communication terminal to be communicated. The method and the system are used for solving the problem that the IEC104 is used when the IP of the IEC104 communication terminal is not fixed, and meanwhile, through a communication agent mode, the communication terminal and the main station software part do not need to be modified, and the requirements of various application scenes can be met only by pertinently realizing the agent part.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an IEC104 communication agent service method, device and system based on a port mapping technology.
Background
The existing embedded device IEC104 service is mostly communicated with the master station by directly establishing a communication connection between the two. In the field of power system communication, the IEC104 generally serves as a server at a communication terminal, the IEC104 master station serves as a client, the communication terminal IP is configured at the master station, and connection establishment and communication are initiated to the corresponding communication terminal.
When the IP used by the IEC104 communication terminal to provide the connection to the master station is not fixed or dynamically changes, the master station cannot make an adaptation to establish a connection to the unfixed IP. Under the background that the IEC104 function is realized through the existing end-to-end connection of a pair of server/client, for some application scenarios, the IEC104 function can only be realized by acquiring server/client codes and performing relevant modification.
The chinese patent application with the application number CN201610029331.7 discloses a TCP transparent proxy implementation method oriented to the power IEC104 protocol, which effectively solves the security problem of IEC104 message information plaintext transmission and improves the reliability of message transmission. The method comprises the following steps: s1, the client gateway encryption equipment acquires message information with a serial number sent by the IEC104 client, sends the message information to the server gateway encryption equipment, and then sends the message information to the IEC104 server; s2, the client gateway encryption equipment generates a gateway serial number and establishes a tunnel with the server gateway encryption equipment, and a communication message of the gateway serial number is autonomously transmitted to the server gateway encryption equipment at an untimed time; s3, the IEC104 client sends message information with serial numbers, the client gateway encryption equipment generates gateway serial numbers according to the serial numbers and encrypts the message information, and the message information is combined to generate processing information and is transmitted to the server gateway encryption equipment; and S4, the server gateway encryption equipment reversely processes the gateway serial number, decrypts the message information and transmits the decrypted message information to the IEC104 server.
The chinese patent application with the application number CN201110205048.2 discloses a method and a system for implementing data exchange in IEC104 communication protocol forwarding. The substation forwards the received I frame message to the terminal or the main station, and matches the frame number of the I frame message, so that the problems of mismatching of the frame number in the communication protocol and communication blockage between the substation and a plurality of terminals by using the communication protocol are solved. The method comprises the following steps: 1, creating a receiving management thread, a sending management thread, a receiving queue and a sending queue; 2, receiving a message sent by the terminal and/or the master station; 3, judging whether the message is from a terminal or a main station according to the IP address of the receiver, and identifying the types and ID numbers of the terminal and the main station; 4, judging whether the message is an I frame of the communication protocol according to the control domain byte of the message, if so, turning to 5, and if not, returning to 2; 5, reading and analyzing the I frame message, and matching the frame number of the I frame message; 6, storing the matched I frame message in a sending queue; and 7, reading the I frame message and sending the I frame message to the terminal or the main station carrying the identifier. And the substation forwards the received I frame message to the terminal or the main station, and the frame sequence number of the I frame message is matched.
According to the method, the traditional IEC client and the server are used for direct communication, or client equipment and server equipment are added between the IEC client and the server, and an IEC104 message communication channel is constructed. The realization of the device channel function added between the IEC client and the server requires the cooperation of client/server programs, and the programs of the client and the server cannot be modified.
Disclosure of Invention
Objects of the invention
The invention aims to provide an IEC104 communication agent service method, a device and a system based on a port mapping technology, which are used for solving the problem that IEC104 is used when the IP of an IEC104 communication terminal is not fixed, and meanwhile, through a communication agent mode, the communication terminal and a main station software part do not need to be modified, and the requirements of various application scenes can be met only by purposefully realizing the agent part.
(II) technical scheme
In order to solve the above problem, a first aspect of the present invention provides an IEC104 communication agent service method based on a port mapping technique, which is executed at a master station agent side, and includes:
receiving a connection request initiated by a terminal agent and establishing connection;
receiving IEC communication terminal ID information sent by a terminal agent;
establishing a corresponding relation between the IEC communication terminal ID information and the virtual IP information, and generating a port mapping table;
receiving a connection request initiated by an IEC master station, wherein the connection request comprises virtual IP information corresponding to the IEC communication terminal to be communicated, which is determined by the IEC master station according to the port mapping table;
and establishing a communication channel between the IEC master station and the master station agent according to the virtual IP information corresponding to the IEC communication terminal to be communicated, so as to receive the data information sent by the IEC master station through the communication channel and send the data information to the corresponding terminal agent.
Specifically, the receiving a connection request initiated by a terminal agent and establishing a connection includes:
and receiving connection requests initiated by a plurality of terminal agents and establishing connection, wherein one terminal agent corresponds to one IEC communication terminal.
Specifically, the establishing of the correspondence between the IEC communication terminal ID information and the virtual IP information, and the generating of the port mapping table include:
displaying the IEC communication terminal ID information and the virtual IP information to enable a user to manually select the corresponding relation between the IEC communication terminal ID information and the virtual IP information, and generating a port mapping table according to the selected corresponding relation between the IEC communication terminal ID information and the virtual IP information; or
And establishing a corresponding relation between the IEC communication terminal ID information and the virtual IP information based on a preset rule, and dynamically generating a port mapping table.
Further, before establishing the correspondence between the IEC communication terminal ID information and the virtual IP information, the method further includes:
displaying a virtual IP information setting interface to be used for manually inputting virtual IP information; or
And dynamically generating virtual IP information according to a preset rule.
In a second aspect of the present application, there is provided an IEC104 communication proxy service method based on a port mapping technique, executed at a terminal proxy, including:
initiating a connection request to an IEC communication terminal;
after the connection is established, acquiring IEC communication terminal ID information of the IEC communication terminal;
and initiating a connection request to a master station agent so as to send the IEC communication terminal ID information to the master station agent after connection is established, so that the master station agent executes any one of the communication agent service methods executed at the master station agent side.
In a third aspect of the present application, an embedded apparatus is provided, which is located on a master station side, and includes a memory, a processor, and a computer program stored on the memory and running on the processor, where the computer program includes a master station program and a master station agent program, the processor is coupled to the memory, and the processor executes the master station agent program, and in the communication agent service method, the master station program is executed to initiate a connection request to the master station agent, and send data information including an IEC communication terminal ID to the master station agent through an established communication channel.
The fourth aspect of the application provides an embedded device, is located the terminal side, including memory and treater, and store on the memory and in the computer program of operation on the treater, computer program includes IEC communication terminal program and terminal agent program, the treater with the memory is coupled, the treater is executed realize when terminal agent program that terminal agent end was carried out communication agent service method, carry out when IEC communication terminal program realize receiving the connection request that terminal agent sent and establish the connection, carry out data interaction with terminal agent.
In a fifth aspect of the present application, there is provided a communication agent service apparatus, located on a master station side, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor is coupled to the memory, and when the processor executes the computer program, the communication agent service method implemented by any one of the communication agent service methods executed by the master station agent side is implemented.
In a sixth aspect of the present application, there is provided a communication agent service apparatus, located at a terminal side, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor is coupled to the memory, and the processor executes the computer program to implement the communication agent service method executed at the terminal agent side.
A seventh aspect of the present application provides an IEC104 communication proxy service system based on a port mapping technique, including a master station-side device and a terminal-side device, where:
the master station side equipment comprises the master station side embedded device, or the master station side equipment comprises an IEC master station and the master station side communication proxy service device;
the terminal side equipment comprises the terminal embedded equipment, or the terminal side equipment comprises IEC terminal equipment and the terminal side communication agent service device.
(III) advantageous effects
The technical scheme of the invention has the following beneficial technical effects:
the communication agent service method of the invention firstly establishes a communication agent channel by adding a terminal agent and a main station agent between an IEC communication terminal and a main station, establishes a port mapping table on the main station agent side according to communication terminal ID information sent by the terminal agent after establishing the communication agent channel, and corresponds a virtual IP to the terminal ID information, and the main station can communicate with each communication terminal through different virtual IPs and terminal ID information through the established communication agent channel. The communication agent service method of the invention can also establish connection with the main station in an agent mode under the condition that the IP of the communication terminal is not fixed, and can achieve the purpose of not modifying programs of the communication terminal and the main station in the agent mode aiming at various different application scenes.
Drawings
FIG. 1 is a flowchart of an IEC104 communication agent service method based on a port mapping technique, which is executed at a master station agent end according to the present invention;
FIG. 2 is a schematic diagram of an IEC104 communication agent service system based on port mapping technology provided by the present invention;
fig. 3 is a schematic diagram illustrating a principle of an IEC104 communication proxy service method based on a port mapping technique according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an IEC104 communication proxy service system based on a port mapping technique according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1, the present invention provides an IEC104 communication proxy service method based on a port mapping technique, which is executed at a master station proxy side, and includes:
step 101: receiving a connection request initiated by a terminal agent and establishing connection;
step 102: receiving IEC communication terminal ID information sent by a terminal agent;
step 103: establishing a corresponding relation between the IEC communication terminal ID information and the virtual IP information, and generating a port mapping table;
specifically, the master agent may generate a virtual IP address from the received terminal ID, and then correspond the terminal ID to the virtual IP information.
Step 104: receiving a connection request initiated by an IEC master station, wherein the connection request comprises virtual IP information corresponding to the IEC communication terminal to be communicated, which is determined by the IEC master station according to the port mapping table;
step 105: and establishing a communication channel between the IEC master station and the master station agent according to the virtual IP information corresponding to the IEC communication terminal to be communicated, so as to receive the data information sent by the IEC master station through the communication channel and send the data information to the corresponding terminal agent.
Specifically, the IEC master station may establish connection and communication with the virtual IP through routing information set in the system to the virtual IP or a communication mechanism inherent in generating the virtual IP. In an optional embodiment, the correspondence between the IEC communication terminal ID and the virtual IP information in the port mapping table is preset to the IEC master station by a configuration manner. In other embodiments, the IEC master station may send the ID of the IEC communication terminal to be communicated to the master station agent, and the master station agent returns the corresponding virtual IP address.
In an optional embodiment, the IEC104 of the communication terminal is a service end, and the IEC104 of the master station is a client; the terminal agent comprises two clients, and the main station agent comprises two servers. The client of the terminal agent is respectively connected with the communication terminal and the server of the main station agent, and the server of the main station agent respectively receives the connection initiated by the terminal agent and the main station client. The terminal agent transmits the terminal ID information to the master agent, and different communication terminals have different terminal IDs. And establishing a port mapping table in the main station agent part, and using different virtual IP information to correspond to the ID of the communication terminal.
The communication agent service method of the invention firstly establishes a communication agent channel by adding a terminal agent and a main station agent between an IEC communication terminal and a main station, establishes a port mapping table on the main station agent side according to communication terminal ID information sent by the terminal agent after establishing the communication agent channel, and corresponds a virtual IP to the terminal ID information, and the main station can communicate with each communication terminal through different virtual IPs and terminal ID information through the established communication agent channel. The communication agent service method of the invention can also establish connection with the main station in an agent mode under the condition that the IP of the communication terminal is not fixed, and can achieve the purpose of not modifying programs of the communication terminal and the main station in the agent mode aiming at various different application scenes.
Specifically, the receiving a connection request initiated by a terminal agent and establishing a connection includes:
and receiving connection requests initiated by a plurality of terminal agents and establishing connection, wherein one terminal agent corresponds to one IEC communication terminal.
As shown in fig. 2, each communication terminal has a different terminal ID, each communication terminal corresponds to one terminal agent, and a plurality of terminal agents can establish a many-to-one connection with the master agent at the same time.
Specifically, the port mapping table may be a static table created and maintained manually, or a dynamic table dynamically generated and maintained based on a certain rule, and in an optional embodiment, the establishing a correspondence between the IEC communication terminal ID information and the virtual IP information to generate the port mapping table includes: displaying the IEC communication terminal ID information and the virtual IP information so that a user manually selects the corresponding relation between the IEC communication terminal ID information and the virtual IP information; and generating a port mapping table according to the corresponding relation between the selected IEC communication terminal ID information and the virtual IP information. In another optional embodiment, the corresponding relationship between the IEC communication terminal ID information and the virtual IP information is established based on a preset rule, a port mapping table is dynamically generated, and when the communication terminal changes, the master station agent synchronously updates the port mapping table, thereby implementing dynamic maintenance and management of the port mapping table.
Further, the virtual IP information can be set manually or generated dynamically, and the communication connection link can be clear by having related routing information in the system. In an optional embodiment, before establishing the correspondence between the IEC communication terminal ID information and the virtual IP information, a virtual IP information setting interface is displayed to be used for manually inputting the virtual IP information. In another optional embodiment, before the corresponding relationship between the IEC communication terminal ID information and the virtual IP information is established, the virtual IP information is dynamically generated according to a preset rule.
The invention also provides an IEC104 communication agent service method based on the port mapping technology, which is executed at a terminal agent end and comprises the following steps:
step 201: initiating a connection request to an IEC communication terminal;
step 202: after the connection is established, acquiring IEC communication terminal ID information of the IEC communication terminal;
specifically, the terminal agent may use a device serial number of the communication terminal as the ID information, or information capable of identifying the uniqueness of the communication terminal in the composed system may be used as the ID information.
Step 203: and initiating a connection request to a master station agent so as to send the IEC communication terminal ID information to the master station agent after connection is established, so that the master station agent executes any one of the communication agent service methods executed at the master station agent side.
The invention also provides an embedded device which is positioned at the master station side and comprises a memory, a processor and a computer program which is stored on the memory and runs on the processor, wherein the computer program comprises a master station program and a master station agent program, the processor is coupled with the memory, when the processor executes the master station agent program, the communication agent service method executed at the master station agent end is realized, when the master station program is executed, a connection request is initiated to the master station agent, and data information containing the IEC communication terminal ID is sent to the master station agent through the established communication channel.
The invention also provides an embedded device which is positioned at a terminal side and comprises a memory, a processor and a computer program which is stored on the memory and operated on the processor, wherein the computer program comprises an IEC communication terminal program and a terminal agent program, the processor is coupled with the memory, the communication agent service method executed by the terminal agent side is realized when the processor executes the terminal agent program, the connection request sent by the terminal agent is received and the connection is established when the IEC communication terminal program is executed, and the data interaction is carried out with the terminal agent.
The invention also provides a communication agent service device, which is positioned at the master station side and comprises a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor is coupled with the memory, and when the processor executes the computer program, the communication agent service method executed by the master station agent side is realized.
The invention also provides a communication agent service device which is positioned at a terminal side and comprises a memory, a processor and a computer program which is stored on the memory and runs on the processor, wherein the processor is coupled with the memory, and the communication agent service method executed by the terminal agent side is realized when the processor executes the computer program.
The device embodiment of the present invention corresponds to the method embodiment, and specific descriptions and effects refer to the method embodiment, which are not repeated in the device embodiment.
A seventh aspect of the present application provides an IEC104 communication proxy service system based on a port mapping technique, including a master station-side device and a terminal-side device, where:
the master station side equipment comprises the master station side embedded device, or the master station side equipment comprises an IEC master station and the master station side communication proxy service device;
the terminal side equipment comprises the terminal side embedded equipment, or the terminal side equipment comprises IEC terminal equipment and the terminal side communication agent service device.
In a specific embodiment, the master device includes an IEC master and a master communication proxy service device, and the terminal device includes an IEC terminal device and a terminal communication proxy service device, referring to fig. 3, the communication proxy service method of the system includes the following steps:
s1, the master station side communication proxy service device receives the connection request initiated by the terminal side communication proxy service device through the set IP and the set port, and successfully establishes the connection;
s2, the master station side communication agent service device receives the message containing the terminal ID information sent by the terminal side communication agent service device;
s3, after the master station side communication proxy service device receives the message and analyzes the terminal ID information, the IP address of the container is corresponding to the analyzed terminal ID information on the device in a container operation mode, and a port mapping table is established to store a mapping relation;
s4, the IEC master station initiates a connection request to the corresponding IP address by the communication terminal ID in the port mapping table according to the communication terminal needing to communicate;
s5, the master station side communication proxy service device receives the master station connection request and successfully establishes connection;
and S6, after the whole connection channel is established, the master station side communication proxy service device and the terminal side communication proxy service device carry out interaction and information transmission, different communication terminals are distinguished according to the corresponding relation of the port mapping table, and communication between the communication terminals and the master station is realized.
In this embodiment, the virtual IP information is generated in a container running manner and mapped with the terminal ID, or other manners may be used to generate the virtual IP information, and only a route leading to the virtual IP needs to be configured in the system, so as to ensure that the communication link is smooth.
In another specific embodiment, referring to fig. 4, the master station-side device includes an IEC master station and a master station-side communication proxy service apparatus, and the terminal-side device is an internet of things proxy terminal:
p1, operating IEC104 (service terminal) service on the Internet of things agent terminal, and deploying a terminal agent software module;
p2, the terminal agent software initiates and establishes connection to the terminal local IP and IEC104 service port (2404);
p3, terminal agent software dials through 4G module and SIM card, and initiates and establishes connection to the remote master station agent after successful dialing;
p4, the terminal agent software sends the terminal ID information to the master station agent through establishing connection in P3;
and P5, after the whole connection channel is established, the terminal agent software interacts and transfers information with the main station agent to realize the communication between the communication terminal and the main station.
In this embodiment, the terminal agent is deployed in the form of a software module and runs on a communication terminal, and the communication terminal has a 4G communication module and a SIM card and communicates with the master station in a wireless manner. The master station side communication agent service device has a fixed public network IP address.
The communication agent service device is matched with the embedded device, an agent channel is established between the IEC104 service end and the main station, the application scene of the IEC104 can be enriched, the problem that the IEC104 is used when the IP of the IEC104 communication terminal is not fixed is solved, meanwhile, the software parts of the communication terminal and the main station are not required to be modified in an agent mode, and the application requirement can be met only by realizing the agent part aiming at the application scene.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. An IEC104 communication agent service method based on a port mapping technology is executed at a main station agent side, and is characterized by comprising the following steps:
receiving a connection request initiated by a terminal agent and establishing connection;
receiving IEC communication terminal ID information sent by a terminal agent;
establishing a corresponding relation between the IEC communication terminal ID information and the virtual IP information, and generating a port mapping table;
receiving a connection request initiated by an IEC master station, wherein the connection request comprises virtual IP information corresponding to the IEC communication terminal to be communicated, which is determined by the IEC master station according to the port mapping table;
and establishing a communication channel between the IEC master station and the master station agent according to the virtual IP information corresponding to the IEC communication terminal to be communicated, so as to receive the data information sent by the IEC master station through the communication channel and send the data information to the corresponding terminal agent.
2. The communication agent service method according to claim 1, wherein the accepting of the connection request initiated by the terminal agent and the establishing of the connection comprises:
and receiving connection requests initiated by a plurality of terminal agents and establishing connection, wherein one terminal agent corresponds to one IEC communication terminal.
3. The communication proxy service method of claim 1, wherein the establishing of the correspondence between the IEC communication terminal ID information and the virtual IP information and the generating of the port mapping table include:
displaying the IEC communication terminal ID information and the virtual IP information to enable a user to manually select the corresponding relation between the IEC communication terminal ID information and the virtual IP information, and generating a port mapping table according to the selected corresponding relation between the IEC communication terminal ID information and the virtual IP information; or
And establishing a corresponding relation between the IEC communication terminal ID information and the virtual IP information based on a preset rule, and dynamically generating a port mapping table.
4. The communication proxy service method according to claim 1, wherein before establishing the correspondence between the IEC communication terminal ID information and the virtual IP information, the method further comprises:
displaying a virtual IP information setting interface to be used for manually inputting virtual IP information; or
And dynamically generating virtual IP information according to a preset rule.
5. An IEC104 communication agent service method based on a port mapping technology is executed at a terminal agent side, and is characterized by comprising the following steps:
initiating a connection request to an IEC communication terminal;
after the connection is established, acquiring IEC communication terminal ID information of the IEC communication terminal;
initiating a connection request to a master agent to send the IEC communication terminal ID information to the master agent after establishing a connection, so that the master agent performs the communication agent service method of any one of claims 1 to 4.
6. An embedded device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the computer program comprises a master station program and a master station agent program, the processor is coupled to the memory, the processor implements the communication agent service method according to any one of claims 1 to 4 when executing the master station agent program, implements initiating a connection request to the master station agent when executing the master station program, and transmits data information containing an IEC communication terminal ID to the master station agent through an established communication channel.
7. An embedded device, comprising a memory and a processor, and a computer program stored on the memory and running on the processor, wherein the computer program comprises an IEC communication terminal program and a terminal agent program, the processor is coupled to the memory, and the processor implements the communication agent service method of claim 5 when executing the terminal agent program, and implements receiving a connection request sent by a terminal agent and establishing a connection when executing the IEC communication terminal program, and performs data interaction with the terminal agent.
8. A communication proxy service apparatus comprising a memory and a processor, and a computer program stored on the memory and running on the processor, the processor being coupled to the memory, the processor implementing the communication proxy service method of any one of claims 1 to 4 when executing the computer program.
9. A communication proxy service apparatus comprising a memory and a processor, and a computer program stored on the memory and running on the processor, the processor being coupled to the memory, the processor implementing the communication proxy service method of claim 5 when executing the computer program.
10. An IEC104 communication agent service system based on a port mapping technology is characterized by comprising a master station side device and a terminal side device, wherein:
the master station side device comprises the embedded apparatus of claim 6, or the master station side device comprises an IEC master station and the communication agent service apparatus of claim 8;
the terminal side device comprises the embedded device of claim 7, or the terminal side device comprises an IEC terminal device and the communication agent service apparatus of claim 9.
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