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Serial communication method

A serial communication and receiver technology, applied in the direction of error prevention/detection using the return channel, digital transmission system, electrical components, etc., can solve the problems of increasing overhead, efficiency, and improving the complexity of encoding and decoding of the sender and receiver, etc. problem, achieve the effect of reducing overhead, improving efficiency, and avoiding frame synchronization errors

Active Publication Date: 2014-11-19
AEROSPACE DONGFANGHONG SATELLITE
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  • Abstract
  • Description
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Problems solved by technology

[0004] (1) When the sending and receiving parties perform data transmission, a fixed frame length is generally used for data transmission, and because the size of the data packet varies greatly, when the data packet is split with a fixed frame length, it will cause efficiency problems
[0005] (2) in the prior art, when the data transmitted is binary data, the data loaded by the data frame will inevitably conflict with the control word adopted by the frame. The traditional technology has adopted various encoding methods to solve this problem, but This will increase the complexity of the sender and receiver due to the encoding and decoding of data
[0006] (3) The frame headers all use fixed-format bytes, which adds additional overhead to the communication process

Method used

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Embodiment Construction

[0019] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0020] like figure 2 Shown is a schematic diagram of the frame format of the present invention. In the frame format, frame header, check field, data field and frame tail.

[0021] Frame header part: In order to reduce the overhead introduced by the communication protocol, a combination of frame type and data type is used in the frame header part. The frame type is used to identify whether the currently transmitted data frame is the first frame of the data block to be transmitted, the middle frame or The last frame, in the frame type part, the three types other than the data frame can also include the frame type used to represent the control frame including the coordination frame and the retransmission request frame; the data type is used to distinguish the data frame loaded Data block type identifier, starting with figure 2 Take the frame header with a length of ...

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Abstract

The invention discloses a serial communication method, comprising: a step of sending a coordination frame to a receiver by a sender; a step of framing and sending according to the convention of the coordination frame by the sender; a step of receiving the data frame and checking and recording error data blocks according to the convention of the coordination frame by the receiver; and a step of sending a re-sending request frame to the sender by the receiver. Through the serial communication method, the data sending behaviors and the data frame formats of the receiver and the sender of serial data communication are coordinated, so that the flexibility and the communication efficiency of the serial data communication are improved.

Description

technical field [0001] The invention relates to a serial communication method. Background technique [0002] As a widely used physical layer asynchronous communication interface, the serial interface is used in the lower computers on the star and the computer of the star service center, such as the data communication interface on the star or the debugging interface. In these applications, two serial ports are usually directly connected for data transmission. However, due to the bidirectional transmission of a large amount of data of various types in practical applications, and the serial communication can only transmit one byte at a time, it is necessary to customize the data link layer and application layer protocol to ensure reliable and effective data transmission. Generally, a method of framing the transmitted data of the same type is adopted. [0003] In the existing serial communication technology, there are the following problems: [0004] (1) When the sending and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16
Inventor 申泽庶谢松刘思远
Owner AEROSPACE DONGFANGHONG SATELLITE
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