Data transmission method for embedded application special characters

A data transmission method and special character technology, applied in the field of communication, to achieve the effect of improving transmission efficiency and reliability

Inactive Publication Date: 2019-08-06
北京海泽时空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem that no error correction function affects data transmission in the data transmission process under the SLIP protocol in the prior art, a data transmission method for embedded application special characters is provided, by setting special characters and error detection on the coded frame character, transmission error detection and error correction can be done at the data link layer, greatly improving the overall transmission efficiency and reliability

Method used

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  • Data transmission method for embedded application special characters
  • Data transmission method for embedded application special characters
  • Data transmission method for embedded application special characters

Examples

Experimental program
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Embodiment 1

[0041] Such as figure 1 As shown, a data transmission method for embedded application special characters, comprising the following steps:

[0042] S1. On the sending side, the data link layer of the host obtains the application protocol data unit 300 from the application layer of the host, performs encoding to generate an encoded frame, and transmits the encoded frame to the physical layer of the host;

[0043] Such as image 3 As shown, the coded frame includes successively connected one byte END character 100, one byte data sequence character 200, application protocol data unit 300, two byte error detection character 400, one byte END character 100; as figure 2 As shown, the encoding process of an encoded frame includes the following steps:

[0044] S11. Adding a data sequence character 200 before the application protocol data unit 300;

[0045] S12. Generate an error detection character 400 according to the data sequence character 200 and the application protocol data u...

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PUM

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Abstract

The invention discloses a data transmission method for embedded application special characters, which comprises the following steps: S1, a host data link layer acquires an application protocol data unit (300) from a host application layer at a sending side for coding to generate a coding frame, and transmits the coding frame to a host physical layer, wherein the coding frame comprises an END character (100), a data sequence character (200), an application protocol data unit (300), an error detection character (400) and an END character (500) which are sequentially connected; s2, the host physical layer transmits the coded frame to a slave physical layer located on the receiving side; s3, the slave physical layer transmits the coded frame to a slave data link layer for decoding; and S4, data transmission is completed. According to the data transmission method used for the embedded application special characters, the END characters (100) and the error detection characters (400) are set on the coding frame, transmission error detection and correction can be completed on the data link layer, and the overall transmission efficiency and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a data transmission mode for embedded application special characters. Background technique [0002] The communication protocol between the slave (DSP) and the host (PC) consists of a three-layer protocol roughly following the simplified model of the OSI 7-layer network protocol. These three layers include: [0003] The physical layer defines the electrical interface between the master and slave and provides the byte width of the data bits transmitted over the physical link. [0004] The data link layer encodes multibyte data messages into frames to be sent and received on the physical layer. [0005] The application layer defines the set of messages used to communicate between the master and the slave. These messages are called APDUs. The application layer defines a set of commands and responses used for communication. [0006] Hierarchically, the application layer is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/16
CPCH04L1/0061H04L1/1607
Inventor 张载龙
Owner 北京海泽时空科技有限公司
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