CN114666406A - Object model-based power internet of things data compression method and device - Google Patents

Abstract

The invention discloses a method and device for data compression of the Internet of Things in electric power based on an object model. A compression and decompression module is added between the IoT management platform and the edge agent. The IoT management platform automatically generates a compression dictionary file according to the object model file and saves it on the edge agent synchronously. Automatic compression and decompression are completed according to the compression dictionary during data transmission. This method is completely transparent to the business system based on the intelligent IoT system, which not only ensures the simplicity and flexibility of using the JSON format in the system interaction process, but also improves the efficiency of data transmission.

Description

A method and device for data compression of power internet of things based on object model

technical field

The invention belongs to the field of the power Internet of things, and relates to a data compression method and device for the power Internet of things based on an object model, in particular to an efficient compression suitable for massive, real-time, high-frequency, short and small data packets.

Background technique

In 2019, State Grid proposed to build a smart IoT system to provide unified IoT management services for all majors in development, transmission, distribution, and transformation, coordinate IoT and perception needs in various fields, and realize unified IoT based on the IoT model. Link management and terminal standardized access; provide standard data services for middle-office and business systems to form an ecosystem of cross-professional data sharing and sharing. The system has achieved large-scale access in Jiangsu, Shandong, etc., and has become the basic platform for data collection of the power Internet of Things.

In the smart IoT architecture, the messages transmitted by the cloud edge have the characteristics of small length and high transmission frequency. The data is mainly organized in JSON format. This method is simple, easy to use, and has strong self-describing ability, which facilitates data interaction between business systems. , but there is a problem of low data transmission efficiency. Taking the application of power distribution in the field of power distribution as an example, the data efficiency is less than 40%. After the large-scale application of the smart IoT system, the low data transmission efficiency results in wasted bandwidth and greatly increases production costs.

In traditional power regulations, the transmission of descriptive information is reduced through point ID mapping and the transmission efficiency is improved, but the configuration and maintenance of point IDs require a lot of manpower and are prone to errors.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a method and device for compressing data of the Internet of Things in electric power based on the object model, so as to solve the problem that when the JSON format message is used to transmit data in the large-scale application of the Internet of Things in the electric power, there is a large amount of data due to short length and high transmission frequency. Real-time data cannot be effectively compressed, resulting in low cloud-side information transmission efficiency and serious waste of bandwidth resources.

In order to solve the above problems, the present invention adopts the following technical solutions:

In one aspect, a data compression method for the Internet of Things in electric power based on an object model includes:

According to the compression dictionary file pre-generated and saved on the IoT management platform, compress the data message in the first format sent by the IoT management platform to the edge agent, generate a data message in the second format, and compress the data message in the second format. The datagram is transmitted to the edge proxy; and,

According to the compression dictionary file, decompress the data message in the second format received by the IoT management platform to generate the data message in the first format;

The compression dictionary file is automatically generated according to the device object model file, and each object model file corresponds to a compression dictionary file.

Further, the compression dictionary file generated on the IoT management platform is synchronously stored on the edge agent, and the method for compressing data on the Internet of Things in electric power based on the object model further includes:

According to the compression dictionary file synchronously saved on the edge agent, compress the data packets in the first format sent by the edge agent to the IoT management platform, generate data packets in the second format, and transmit the data packets in the second format. to the IoT Management Platform; and,

According to the compression dictionary file, the data message in the second format received by the edge agent is decompressed to generate the data message in the first format.

Further, the compression dictionary file is generated according to the following method:

Divide the data in the object model file into string types, numeric types, enumeration types and composite types;

The string type adopts constant storage or direct storage. The constant storage method is to directly store the ID of the string constant after the field name is encoded. Each object model file corresponds to a string constant dictionary. Encoding; the direct storage method is to first store the field name encoding, then store the length of the string, and finally store the content of the string;

Numerical types and enumeration types directly store the numeric content after the field name is encoded during compression;

When the composite type is compressed, the field name code is first stored, and then the "number of sub-members" is stored. The sub-member objects are then arranged in order, and the sub-members are separated by separators.

Further, the IOT management platform saves the mapping relationship between the device ID and the dictionary file, and when the IOT management platform sends a data message in the first format to the edge agent, it intercepts and parses the data message in the first format. Get the device ID, look up the corresponding compression dictionary file according to the device ID, and compress the data message in the first format according to the compression dictionary file; when the IoT management platform receives the data message in the second format, it will The data message in the second format is intercepted and the device ID is parsed therefrom, the corresponding compression dictionary file is searched according to the device ID, and the data message in the second format is decompressed according to the compression dictionary file.

Further, the edge agent synchronously saves the mapping relationship between the device ID and the dictionary file, and when the edge agent sends the data message in the first format to the IoT management platform, it intercepts the data message in the first format and parses it out. Device ID, find the corresponding compression dictionary file according to the device ID, and compress the data message in the first format according to the compression dictionary file; when the edge agent receives the data message in the second format, the received data in the second format is The packet is intercepted, the device ID is parsed from it, the corresponding compression dictionary file is searched according to the device ID, and the data packet in the second format is decompressed according to the compression dictionary file.

In another aspect, a data compression device for the Internet of Things in electric power based on an object model includes: a first data compression module and a first data decompression module deployed on an IoT management platform,

The first data compression module is used to compress the data message in the first format sent by the IoT management platform to the edge agent according to the compression dictionary file pre-generated and stored on the IoT management platform, and generate a second format. The data message in the second format is transmitted to the edge agent;

The first data decompression module is configured to decompress the data message in the second format received by the IoT management platform according to the compression dictionary file, and generate the data message in the first format;

The compression dictionary file is automatically generated according to the device object model file, and each object model file corresponds to a compression dictionary file.

Further, the described device for data compression of the Internet of Things in electric power based on the object model further includes: a second data compression module and a second data decompression module deployed on the edge agent,

The second data compression module is used for compressing the data message in the first format sent by the edge agent to the IoT management platform according to the compression dictionary file synchronously stored on the edge agent to generate the data message in the second format , transmit the data message in the second format to the IoT management platform;

The second data decompression module is configured to decompress the data message in the second format received by the edge agent according to the compression dictionary file, and generate the data message in the first format.

Further, the described system for efficient data transmission based on the object model of the power Internet of Things further includes: a dictionary generation module, the dictionary generation module is deployed on the IOT management platform, and is used for generating a compression dictionary according to the device object model file document.

Further, the described system for efficient data transmission of the Internet of Things in electric power based on the object model further includes: a first dictionary synchronization module deployed on the IoT management platform and a second dictionary synchronization module deployed on the edge agent, so The first dictionary synchronization module is used to send the description information of the dictionary file generated by the dictionary generation module to the edge agent, and the second dictionary synchronization module is used to download the dictionary file according to the description information.

Compared with the prior art, the beneficial technical effects of the present invention are as follows: the present invention supports the use of JSON format for business interaction, and the IOT management platform automatically generates a compression dictionary according to the object model file and synchronously saves it on the edge agent. During data transmission, according to the compression dictionary Complete automatic compression and decompression, effectively improve data transmission efficiency and reduce production costs under the premise of ensuring business interaction is simple and easy to use, providing strong support for the large-scale application of smart IoT systems in the power field.

Description of drawings

FIG. 1 is a flowchart of a method for compressing data of the Internet of Things in electric power based on an object model according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for compressing data of the Internet of Things in electric power based on an object model according to another embodiment of the present invention;

Figure 3 is a schematic diagram of direct storage of strings;

Fig. 4 is a schematic diagram of digital and enumeration type storage;

Fig. 5 is a composite type storage schematic diagram;

FIG. 6 is a structural diagram of a data compression device for the Internet of Things in electric power based on an object model according to an embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific embodiments. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

As mentioned above, when using JSON format messages to transmit data in the large-scale application of the Internet of Things in electric power, there are problems such as low cloud-side information transmission efficiency and serious waste of bandwidth resources due to the inability to effectively compress massive real-time data with short length and high transmission frequency. question. To this end, the present invention proposes a message data compression method based on an object model.

As shown in Figure 1, a data compression method for the Internet of Things in electric power based on the object model includes:

According to the compression dictionary file pre-generated and saved on the IoT management platform, compress the data message in the first format sent by the IoT management platform to the edge agent, generate a data message in the second format, and compress the data message in the second format. The data message is transmitted to the edge proxy;

According to the compression dictionary file, the data message in the second format received by the IoT management platform is decompressed to generate the data message in the first format.

The first format may be JSON format.

The compression dictionary file is automatically generated according to the device object model file, and each object model file corresponds to a compression dictionary file.

Specifically, the compression dictionary file is generated according to the CABM compression method (Data compression algorithm based on object model). The CABM compression method specifically includes:

1. Data type encoding

The commonly used data types such as String, float, int, array, structure, and enumeration in the field of power Internet of Things are divided into four categories, which are represented by "VALUE_TYPE" in the compression dictionary file, as shown in Table 1.

Table 1 Data Type Coding

2. String type encoding

The string type can be stored by constant storage or directly. In the dictionary file, "CODE_TYPE" is used to represent the string storage method.

When storing constants, the ID of the string constant is directly stored after the key_id. Each object model corresponds to a string constant dictionary, which encodes each constant. The format is defined as:

Among them, "CONST_STR_LEN" represents the length required to store the constant encoding, in bytes, and "CONST_STR_CODE" records each constant and its corresponding encoding.

The direct storage method first stores the field name code, then stores the length of the string, and finally stores the content of the string, as shown in Figure 3.

Among them, the string length field adopts variable-length encoding, the minimum is 1 byte, and the maximum is 4 bytes. When the highest bit of each byte is 1, it means that the next byte still stores the length. The encoding range is shown in Table 2. shown.

Table 2 String length range

For example, if a data item "devId" whose data type is STRING is directly stored, the definition of the data item in the dictionary file is:

3. Encoding of numeric types and enumeration types

Numeric types and enumeration types directly store numeric content when compressed, as shown in Figure 4.

In the dictionary file, use "VALUE_LEN" to represent the number of bytes required to store the data item. For example, the data type of a data item "temp" is numeric, and it is defined in the field in the compression dictionary file as:

4. Composite type encoding

A composite type refers to a combined structure composed of one or more sub-members. Each sub-member can be a basic type such as a string, a number, or an enumeration or a composite type.

When the composite type data is compressed, the field name code is stored first, and then the "number of sub-members" is stored. The sub-member objects are then arranged in order, and the sub-members are separated by separators, as shown in Figure 5.

Among them, the number of sub-members adopts variable-length encoding, and the maximum length is 4 bytes. For example, if the field name of a data item is "devs" and the data type is a composite type, the data item is defined in the compression dictionary file as:

The compression algorithm of compound type message is shown in Table 3:

Table 3 Composite Type Compression Algorithms

In a specific embodiment, when receiving a new object model file, the IoT management platform will automatically generate a compressed dictionary file according to the above method, and the content of the automatically compressed file is a JSON format object, including attribute fields, constants dictionary and other information .

After the IoT management platform generates the compression dictionary file, it sends the description information of the compression dictionary file to the edge agent, and the edge agent downloads and saves the compression dictionary file according to the description information.

The compressed dictionary file description information includes: dictionary file name, corresponding device ID, object model file identifier, dictionary file size, MD5 value of the dictionary file, and download URL of the dictionary file.

The IoT management platform and the edge agent also need to save the mapping relationship between the device ID and the dictionary file, so that the dictionary file can be queried during subsequent compression and decompression.

When the IoT management platform sends a data message in the first format to the edge agent, it intercepts the data message in the first format and parses the device ID from it, searches for the corresponding compression dictionary file according to the device ID, and compares the corresponding compression dictionary file according to the compression dictionary file. The data packets in the first format are compressed.

When the IoT management platform receives the data message in the second format, it intercepts the received data message in the second format and parses the device ID from it, searches for the corresponding compression dictionary file according to the device ID, and searches the corresponding compression dictionary file according to the compression dictionary file. Decompress the data packet in the second format.

In another embodiment, as shown in FIG. 2 , a method for compressing data for the Internet of Things in electric power based on an object model further includes:

According to the compression dictionary file synchronously saved on the edge agent, compress the data packets in the first format sent by the edge agent to the IoT management platform, generate data packets in the second format, and transmit the data packets in the second format. to the IoT management platform;

According to the compression dictionary file, the data message in the second format received by the edge agent is decompressed to generate the data message in the first format.

Based on the mapping relationship between the device ID and the dictionary file stored synchronously by the edge agent, when the edge agent sends a data packet in the first format to the IoT management platform, it intercepts the data packet in the first format, and parses the device ID from it. The corresponding compression dictionary file is searched according to the device ID, and the data message in the first format is compressed according to the compression dictionary file.

When the edge agent receives the data packet in the second format, it intercepts the received data packet in the second format and parses the device ID from it, searches for the corresponding compression dictionary file according to the device ID, and parses the second format according to the compression dictionary file. formatted data packets are decompressed.

In another embodiment, an object model-based data compression device for the Internet of Things in electric power, as shown in FIG. 6 , includes: a first data compression module and a first data decompression module deployed on an IoT management platform.

The first data compression module is used for compressing the data message in the first format sent by the IoT management platform to the edge agent according to the compression dictionary file pre-generated and saved on the IoT management platform, and generating data in the second format message, transmitting the data message in the second format to the edge agent;

The first data decompression module is configured to decompress the data message in the second format received by the IoT management platform according to the compression dictionary file, and generate the data message in the first format.

In a specific embodiment, the first data compression module, before the IoT management platform sends the data message in the first format to the edge agent, first intercepts the data message in the first format and parses the device ID from it, and then Find the corresponding dictionary file according to the device ID. If the dictionary file does not exist in the memory, it needs to be loaded; then, according to the dictionary file, the data is automatically compressed, and the compressed data in the second format is transmitted to the edge agent. If the corresponding dictionary file is not saved locally, it will be directly transmitted in the original uncompressed way.

The first data decompression module, when the IoT management platform receives the data message in the second format, intercepts the data message in the second format and parses the device ID from it, and searches for the corresponding dictionary file according to the device ID, If the dictionary file does not exist in the memory, it needs to be loaded; then, according to the dictionary file, the automatic decompression of the data is completed, and the decompressed data in the first format is transmitted to the business system/business center. Similarly, if the corresponding dictionary file is not saved locally, it will be directly transmitted in the original uncompressed way.

In another embodiment, as shown in FIG. 6 , a data compression device for the Internet of Things in electric power based on an object model further includes: a second data compression module and a second data decompression module deployed on the edge agent,

The second data compression module is used for compressing the data message in the first format sent by the edge agent to the IoT management platform according to the compression dictionary file synchronously saved on the edge agent, generating the data message in the second format, and compressing the data message in the second format. The data message in the second format is transmitted to the IoT management platform.

The second data decompression module is configured to decompress the data message in the second format received by the edge agent according to the compression dictionary file, and generate the data message in the first format.

In a specific embodiment, the second data compression module, before the edge agent sends the data message in the first format to the IoT management platform, first intercepts the data message in the first format and parses the device ID from it, and then Find the corresponding dictionary file according to the device ID. If the dictionary file does not exist in the memory, it must be loaded; then, according to the dictionary file, the automatic data compression is completed, and the compressed data in the second format is transmitted to the IoT management platform. If the dictionary file is not saved locally, it will be transmitted directly in the original uncompressed way.

The second data decompression module, when the edge agent receives the data message in the second format, intercepts the data message in the second format and parses the device ID from it, and searches for the corresponding dictionary file according to the device ID. If the dictionary file does not exist in the dictionary, it needs to be loaded; then, according to the dictionary file, the automatic decompression of the data is completed, and the decompressed data in the first format is transmitted to the end device. Likewise, if the dictionary file is not saved locally, it is transferred directly in the original uncompressed way.

In another embodiment, as shown in FIG. 6 , an apparatus for compressing data of the Internet of Things in electric power based on an object model further includes: a dictionary generation module.

The dictionary generation module is mainly deployed on the IoT management platform, which is used to automatically parse and generate a compressed dictionary file according to the device object model file, and the object model file corresponds to the dictionary file one by one.

In another embodiment, as shown in FIG. 6 , an apparatus for compressing data of the Internet of Things in electric power based on the object model further includes: a first dictionary synchronization module and a second dictionary synchronization module.

Among them, the first dictionary synchronization module is deployed on the IoT management platform, the second dictionary synchronization module is deployed on the edge agent, and the first dictionary synchronization module and the second dictionary synchronization module are used to compress the dictionary files generated on the IoT management platform. Synchronization is kept at the edge proxy.

After the IOT management platform generates the dictionary file, the first dictionary synchronization module is used to send the description information of the dictionary file to the edge agent, and the second dictionary synchronization module of the edge agent downloads the dictionary file according to the description information, and saves it on the edge agent; At the same time, the IoT management platform and the edge agent need to simultaneously save the mapping relationship between the device ID and the dictionary file.

The whole work flow of the present invention is as follows:

1) Dictionary file generation

When the IoT management platform receives a new object model file, it will automatically generate a compression dictionary file according to the CABM compression method.

2) Dictionary file synchronization

After the IoT management platform generates the dictionary file, it sends the description information of the dictionary file to the edge agent, and the edge agent downloads the dictionary file according to the description information; both the IoT management platform and the edge agent save the mapping relationship between the device ID and the dictionary file.

3) Data compression

For the IoT management platform, the first data compression module first intercepts the data sent by the IoT platform and parses the device ID, and then searches for the corresponding dictionary file according to the device ID; then, the module completes automatic data compression according to the found dictionary file, And transmit the compressed data to the edge proxy.

For the edge agent, the second data compression module first intercepts the data sent by the edge agent and parses out the device ID, and then searches for the corresponding dictionary file according to the device ID; then, the module automatically compresses the data according to the found dictionary file, and compresses the The latter data is transmitted to the IoT management platform.

4) Data decompression

For the IoT management platform, the first data decompression module first intercepts the compressed data received by the IoT platform and parses the device ID, and then searches the corresponding dictionary file according to the device ID; then, automatically decompresses the data according to the found dictionary file. , and transmit the decompressed data to the business system/business center.

For the edge agent, the second data decompression module first intercepts the data received by the edge agent and parses out the device ID, and then searches for the corresponding dictionary file according to the device ID; The compressed data is transmitted to the end device.

In the present invention, a compression and decompression module is added between the IoT management platform and the edge agent, and the IoT management platform automatically generates a compression dictionary according to the object model file and synchronously saves it on the edge agent, and completes automatic compression and decompression according to the compression dictionary during data transmission. unzip. This process is completely transparent to the business system based on the smart IoT system, which not only meets the requirements of the business interaction for the simple and easy-to-use JSON data format, but also improves the data transmission efficiency and solves the problem of increased traffic costs caused by low transmission efficiency in the production environment. question.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The present invention has been disclosed above with preferred embodiments, but it is not intended to limit the present invention, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation schemes all fall within the protection scope of the present invention.

Claims (9)

1. A method for compressing data of the Internet of Things in electric power based on a thing model, is characterized in that, comprises: According to the compression dictionary file pre-generated and saved on the IoT management platform, compress the data message in the first format sent by the IoT management platform to the edge agent, generate a data message in the second format, and compress the data message in the second format. The datagram is transmitted to the edge proxy; and, According to the compression dictionary file, decompress the data message in the second format received by the IoT management platform to generate the data message in the first format; The compression dictionary file is automatically generated according to the device object model file, and each object model file corresponds to a compression dictionary file. 2. The method for compressing data of the Internet of Things in electric power based on the object model according to claim 1, wherein the compression dictionary file generated on the Internet of Things management platform is synchronously stored on the edge agent, and the method further comprises: According to the compression dictionary file synchronously saved on the edge agent, compress the data packets in the first format sent by the edge agent to the IoT management platform, generate data packets in the second format, and transmit the data packets in the second format. to the IoT Management Platform; and, According to the compression dictionary file, the data message in the second format received by the edge agent is decompressed to generate the data message in the first format. 3. The method for compressing data of the Internet of Things in electric power based on the object model according to claim 1, wherein the compression dictionary file is generated according to the following method: Divide the data in the object model file into string types, numeric types, enumeration types and composite types; The string type adopts constant storage or direct storage. The constant storage method is to directly store the ID of the string constant after the field name is encoded. Each object model file corresponds to a string constant dictionary. Encoding; the direct storage method is to first store the field name encoding, then store the length of the string, and finally store the content of the string; Numerical types and enumeration types directly store the numeric content after the field name is encoded during compression; When the composite type is compressed, the field name code is first stored, and then the "number of sub-members" is stored. The sub-member objects are then arranged in order, and the sub-members are separated by separators. 4. The method for compressing data of the Internet of Things in electric power based on the object model according to claim 1, wherein the IOT management platform saves the mapping relationship between the device ID and the dictionary file, and when the IOT management platform sends the edge agent When sending a data message in the first format, intercept the data message in the first format and parse out the device ID from the data message, search for the corresponding compression dictionary file according to the device ID, and perform the data message in the first format according to the compression dictionary file. Compression; when the IoT management platform receives a data message in the second format, it intercepts the received data message in the second format and parses the device ID from it, searches for the corresponding compression dictionary file according to the device ID, and The dictionary file decompresses the data message in the second format. 5. A kind of power Internet of Things data compression method based on the object model according to claim 1, is characterized in that, described edge agent synchronously saves the mapping relationship between device ID and dictionary file, when edge agent sends to IOT management platform When the data message is in the first format, intercept the data message in the first format and parse the device ID from it, look up the corresponding compression dictionary file according to the device ID, and compress the data message in the first format according to the compression dictionary file. ; When the edge agent receives the data message of the second format, it intercepts the received data message of the second format and parses the device ID from it, searches for the corresponding compression dictionary file according to the device ID, and parses the data message of the second format according to the device ID. The data packets in the second format are decompressed. 6. A power Internet of Things data compression device based on an object model, characterized in that it comprises: a first data compression module and a first data decompression module deployed on the Internet of Things management platform, The first data compression module is used to compress the data message in the first format sent by the IoT management platform to the edge agent according to the compression dictionary file pre-generated and stored on the IoT management platform, and generate a second format. The data message in the second format is transmitted to the edge agent; The first data decompression module is configured to decompress the data message in the second format received by the IoT management platform according to the compression dictionary file, and generate the data message in the first format; The compression dictionary file is automatically generated according to the device object model file, and each object model file corresponds to a compression dictionary file. 7 . The device for data compression of the Internet of Things in electric power based on the object model according to claim 6 , further comprising: a second data compression module and a second data decompression module deployed on the edge agent, 8 . The second data compression module is used for compressing the data message in the first format sent by the edge agent to the IoT management platform according to the compression dictionary file synchronously stored on the edge agent, and generating the data message in the second format , transmit the data message in the second format to the IoT management platform; The second data decompression module is configured to decompress the data message in the second format received by the edge agent according to the compression dictionary file, and generate the data message in the first format. 8 . The device for data compression of the Internet of Things in electric power based on the object model according to claim 7 , further comprising: a dictionary generation module, wherein the dictionary generation module is deployed on the IoT management platform, and is used for according to the device. 9 . The object model file generates a compressed dictionary file. 9 . The device for data compression of the Internet of Things in electric power based on the object model according to claim 8 , further comprising: a first dictionary synchronization module deployed on the IoT management platform and a first dictionary synchronization module deployed on the edge agent. 10 . Two dictionary synchronization modules, the first dictionary synchronization module is used to send the description information of the dictionary file generated by the dictionary generation module to the edge agent, and the second dictionary synchronization module is used to download the dictionary file according to the description information.

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