CN111625244A - 3GPP protocol-based ASN.1-PER dynamic and static encoding and decoding method - Google Patents
3GPP protocol-based ASN.1-PER dynamic and static encoding and decoding method Download PDFInfo
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- CN111625244A CN111625244A CN202010472600.3A CN202010472600A CN111625244A CN 111625244 A CN111625244 A CN 111625244A CN 202010472600 A CN202010472600 A CN 202010472600A CN 111625244 A CN111625244 A CN 111625244A
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Abstract
The invention relates to the technical field of communication, and provides an ASN.1-PER dynamic and static encoding and decoding method based on a 3GPP protocol, which comprises the following steps: step 100, acquiring a compiling option and an ASN.1 text configured by a user; the compiling options comprise protocol names, structure body prefixes, constant type prefixes, macro definition prefixes, enumeration prefixes and dynamic and static information for controlling dynamic and static states; step 200, inputting the ASN.1 text and the compiling options into an ASN.1 text compiler as input; step 300, an ASN.1 text compiler processes the ASN.1 text to generate a required interface file and a required data file; and step 400, encoding or decoding according to the generated interface file and data file, and outputting an encoding result after encoding or outputting a decoding result after decoding. The invention can improve the advantage of product flexibility and has the advantages of small volume of a dynamic structure and high efficiency of a static structure.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an ASN.1-PER dynamic and static encoding and decoding method based on a 3GPP protocol.
Background
The 3GPP organization was established in 1998, month 12, and the 3GPP initially worked to set globally applicable specifications and technical reports for the third generation mobile communication system. The working range of 3GPP has subsequently improved, increasing the research and standardization efforts for UTRA long term evolution systems. The subsequent fourth generation mobile communication technology (LTE, LTE-a), and the latest 5G at present, are emerging from this organization.
The wireless communication technology of China does not participate in the 2G era, the standard of the proprietary intellectual property rights is released in the 3G era, the influence of the proprietary property rights on the 3GPP is expanded in the 4G era, and the 5G communication technology is basically dominated by China until the current 5G era. The importance of ASN.1 has become apparent from TD-SCDMA in the 3G era.
Due to limited radio resources, radio wave transmission of data is required to express as much information as possible with as few data streams as possible to achieve efficient transmission of wireless communication data. And asn.1 just fulfills this requirement. Asn.1(Abstract Syntax Notation One, first edition of common Syntax Notation) describes a data format for data representation, encoding, transmission and decoding. The method provides a mode for describing an object mechanism, does not recognize an environment platform, does not recognize a programming language, and is a set of independent abstract structure methods. PER (Packed Encoding Rules) can better meet the requirement that the most content is represented by the least number of bytes.
At present, a common coding and decoding system needs to do special script coding and decoding according to a specific communication protocol, the self-defined adjustment of a structural mechanism is difficult, the system volume is large, and the resource consumption is large.
Disclosure of Invention
The invention mainly solves the technical problems that the existing coding and decoding system needs to do special script coding and decoding according to a specific communication protocol, the self-defined adjustment of a structural mechanism is difficult, and the like, and provides an ASN.1-PER dynamic and static coding and decoding method based on a 3GPP protocol, which can generate a dynamic data structure or a static data structure or a data structure combined with dynamic and static states and is convenient for a user to adjust the generated structural file according to the requirement; the advantages of improving the flexibility of the product, small volume of the dynamic structure and high efficiency of the static structure are taken into consideration; meanwhile, the purpose of both the accuracy and the reliability of encoding and decoding is achieved.
The invention provides an ASN.1-PER dynamic and static coding and decoding method based on a 3GPP protocol, which comprises the following processes:
301, reading all contents of the ASN.1 text by the ASN.1 text compiler, analyzing the read contents byte by byte, matching keyword information of each type, and converting the ASN.1 text into C structural bodies of different types according to the keyword information in the ASN.1 text; converting the ASN.1 text into a data file according to other information in the ASN.1 text;
step 302, reading the content in the compiling options, determining to generate a data structure with a pointer or a data structure with an array according to the dynamic and static information, and adjusting the name of the generated C structure through the information of the prefix name to generate interface files output by different types of structures;
and step 400, encoding or decoding according to the generated interface file and data file, and outputting an encoding result after encoding or outputting a decoding result after decoding.
Preferably, in step 400, the encoding method includes: assigning a corresponding message structure in the generated interface file according to a C language assignment mode, calling a coding function, converting the data of the C structure into a binary code stream according to a compression coding rule by using the generated data file through the coding function, and outputting a coding result;
the decoding method comprises the following steps: and taking the compressed binary code stream as an input parameter, calling a decoding function, converting the binary code stream into data with a C structure by using the data file and a decoding rule by using the decoding function, wherein the data structure with the C structure is a data structure in the interface file, and realizing decoding.
Preferably, the data types supported by the asn.1 text include: NULL type, BOOLEAN type, ENUMERATED type, INTEREGER type, BIT STRING type, OCTETSTRING type, CHOICE type, SEQUENCE type, and SEQUENCE OF type.
Compared with the prior art, the ASN.1-PER dynamic and static coding and decoding method based on the 3GPP protocol has the following advantages that:
1. different from the scripted realization of other part manufacturers, the invention adopts a universal coding and decoding mode, does not need to carry out special script coding and decoding according to a specific communication protocol, and can adapt to the main communication protocol only by using one set of coding and decoding software.
2. The invention only adapts to part of ASN.1 types supported by the wireless communication protocol, reduces the resource consumption of ASN.1 software in MODEM, ensures the simplification of the ASN.1 software volume, greatly reduces the software volume and the software complexity, and improves the software efficiency and reliability.
The C structural body generated by the ASN.1 text structure is customizable, all messages can be customized into a dynamic structure, all messages can be customized into a static structure, and different messages can be respectively generated into a dynamic or static structure. The flexibility of use of the user is improved. On the basis of volume optimization, the method also has the function of adjusting the dynamic and static structures of the data types of the interface files, and can be adjusted into a dynamic pointer structure according to the requirements of users to further save space, or a static array structure is adopted to further improve efficiency, or different messages respectively use dynamic and static combined coding and decoding modes of dynamic or static modes to meet different requirements of the users.
4. The invention can realize the customization of the interface file, and the user can adjust the naming mode, the abbreviation mode and the like of the interface file generated by the ASN.1 according to the self requirement.
5. The invention can be applied to the field of wireless communication, and both mobile phone wireless communication and vehicle-mounted wireless communication need convenient and reliable compression coding technology.
Drawings
FIG. 1 is a flow chart of the ASN.1-PER dynamic and static encoding and decoding method based on 3GPP protocol provided by the present invention;
FIG. 2 is a schematic process diagram of step 300;
fig. 3 is a process diagram of step 400.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Fig. 1 is a flow chart of the implementation of the asn.1-PER dynamic and static encoding and decoding method based on the 3GPP protocol provided in the present invention. As shown in fig. 1, the asn.1-PER dynamic and static encoding and decoding method based on the 3GPP protocol provided in the embodiment of the present invention includes the following processes:
Step 101, obtaining a compiling option configured by a user.
The compiling options comprise characteristics of protocol names, structure body prefixes, constant type prefixes, macro definition prefixes, enumeration prefixes, dynamic and static information for controlling dynamic and static states and the like. In this embodiment, the compiling option uses a profile.
Wherein [ STATIC ] of the MESSAGE parameter is a STATIC parameter, and [ DYNAMIC ] of the MESSAGE parameter is a DYNAMIC parameter, which may affect the state of the generated interface file. If the static parameters are selected, each type of data generated is mainly in an array form. If dynamic parameters are selected, each type of data generated is primarily in the form of pointers. The invention flexibly adjusts the dynamic and static information, can greatly reduce the memory occupied by the system and improve the coding and decoding efficiency.
Step 102, acquiring the ASN.1 text configured by the user according to the description of the ASN.1 text in the 3GPP protocol.
301, reading all contents of the ASN.1 text by the ASN.1 text compiler, analyzing the read contents byte by byte, matching keyword information of each type, and converting the ASN.1 text into C structural bodies of different types according to the keyword information in the ASN.1 text; and according to other information in the ASN.1 text, converting the ASN.1 text into a data file, and providing support of related information for the encoding and decoding processes.
Step 302, reading the content in the compiling options, determining to generate a data structure with a pointer or a data structure with an array according to the dynamic and static information, and adjusting the name of the generated C structure through the information of the prefix name to generate interface files output by different types of structures.
The data types supported by the ASN.1 text supported by the invention comprise: NULL type, BOOLEAN type, ENUMERATED type, INTEREGER type, BIT STRING type, OCTET STRING type, CHOICE type, SEQUENCE type, and SEQUENCE OF type.
And step 400, encoding or decoding according to the generated interface file and data file, and outputting an encoding result after encoding or outputting a decoding result after decoding.
Fig. 3 is a process diagram of step 400. Referring to fig. 3, the encoding method includes: and assigning a corresponding message structure in the generated interface file according to a C language assignment mode, calling a coding function, converting data of the C structure into a binary code stream by using the generated data file according to a Packed Encoding Rule (PER) by the coding function, and outputting a coding result. The embodiment adopts the PER to better realize the requirement that the most content is represented by the least number of bytes, and the PER can be converted into a more simplified binary code stream.
The decoding method comprises the following steps: and taking the compressed binary code stream as an input parameter, calling a decoding function, converting the binary code stream into data with a C structure by using the data file and a decoding rule by using the decoding function, outputting a decoding result and realizing decoding, wherein the data structure with the C structure is a data structure in the interface file.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some or all technical features may be made without departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. An ASN.1-PER dynamic and static encoding and decoding method based on 3GPP protocol is characterized by comprising the following processes:
step 100, acquiring a compiling option and an ASN.1 text configured by a user; the compiling options comprise protocol names, structure body prefixes, constant type prefixes, macro definition prefixes, enumeration prefixes and dynamic and static information for controlling dynamic and static states;
step 200, inputting the ASN.1 text and the compiling options into an ASN.1 text compiler as input;
step 300, the asn.1 text compiler processes the asn.1 text to generate the required interface file and data file, including steps 301 to 302:
301, reading all contents of the ASN.1 text by the ASN.1 text compiler, analyzing the read contents byte by byte, matching keyword information of each type, and converting the ASN.1 text into C structural bodies of different types according to the keyword information in the ASN.1 text; converting the ASN.1 text into a data file according to other information in the ASN.1 text;
step 302, reading the content in the compiling options, determining to generate a data structure with a pointer or a data structure with an array according to the dynamic and static information, and adjusting the name of the generated C structure through the information of the prefix name to generate interface files output by different types of structures;
and step 400, encoding or decoding according to the generated interface file and data file, and outputting an encoding result after encoding or outputting a decoding result after decoding.
2. The ASN.1-PER dynamic and static codec method based on 3GPP protocol as claimed in claim 1, wherein in step 400, the coding method comprises: assigning a corresponding message structure in the generated interface file according to a C language assignment mode, calling a coding function, converting the data of the C structure into a binary code stream according to a compression coding rule by using the generated data file through the coding function, and outputting a coding result;
the decoding method comprises the following steps: and taking the compressed binary code stream as an input parameter, calling a decoding function, converting the binary code stream into data with a C structure by using the data file and a decoding rule by using the decoding function, wherein the data structure with the C structure is a data structure in the interface file, and realizing decoding.
3. The ASN.1-PER dynamic and static codec method based on 3GPP protocol according to claim 1 or 2, wherein the data types supported by the ASN.1 text include: NULL type, BOOLEAN type, ENUMERATED type, INTEREGER type, BIT STRING type, OCTET STRING type, CHOICE type, SEQUENCE type, and SEQUENCEEF type.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113239394A (en) * | 2021-05-06 | 2021-08-10 | 国家计算机网络与信息安全管理中心 | Firmware protection method, device and equipment |
| CN113742294A (en) * | 2021-08-23 | 2021-12-03 | 宜通世纪科技股份有限公司 | Method, system, device and medium for decoding ASN.1-PER signaling message |
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Denomination of invention: ASN.1-PER dynamic and static encoding and decoding method based on 3GPP protocol Effective date of registration: 20230920 Granted publication date: 20230425 Pledgee: China Merchants Bank Co.,Ltd. Dalian Branch Pledgor: Huachang Technology (Dalian) Co.,Ltd. Registration number: Y2023210000237 |