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Data transmission method, device and communication system

A data transmission method and communication system technology, applied in the field of data transmission method, data transmission device and communication system, can solve the problems of waste of resources, throughput performance, transmission block decoding error, drop, etc., to reduce the amount of data retransmission and feedback The effect of spending

Inactive Publication Date: 2009-12-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] If any coding block in the transmission block is decoded incorrectly, it will appear as a decoding error of the entire transmission block during retransmission, and it is impossible to determine which coding block is wrong, and the entire transmission block needs to be retransmitted during retransmission, resulting in waste of resources and throughput performance Decline

Method used

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  • Data transmission method, device and communication system
  • Data transmission method, device and communication system
  • Data transmission method, device and communication system

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the present invention is described in further detail:

[0024] An embodiment of the present invention provides a data transmission method, the transmission block includes at least one group, and each group includes at least one coding block; a cyclic redundancy CRC check bit is added to each group, and the added CRC check bit is sent group after.

[0025] Such as image 3 As shown, the transmission block is divided into multiple coding blocks (Code Block), and several coding blocks are formed into a group (group). The number of groups contained in one transport block is greater than or equal to 1, and the number of coding blocks contained in each group is greater than or equal to 1. A CRC is added to each group.

[0026] In addition, the transmission block can also be divided into multiple groups, CRC check bits are added to each group, and each group is divided into one or more...

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Abstract

The embodiment of the invention discloses a data transmission method, which comprises the following steps: dividing a transmission block into at least one group, wherein each group comprises at least one coding block; adding cyclic redundancy check CRC bits to each group; and sending the group after addition of the CRC bits. Meanwhile, the embodiment of the invention discloses a data transmission device and a communication system based on grouping concept; and groups corresponding to check errors are retransmitted, so that data retransmission is greatly reduced and simultaneously large throughput gain is acquired.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method, a data transmission device and a communication system. Background technique [0002] In the field of communication and computer, the data frame composed of "0" and "1" is generally used for transmission and storage, and the transmission channel is generally damaged. In order to check the correctness of the received data, the current method is to add correctness check information in the transmitted data frame. This method is called Cyclic Redundancy Check (CRC check for short). [0003] In the 802.16e protocol, when the number of bits in a burst is greater than 4800 bits after adding CRC check bits and padding bits, it will be divided into multiple coded blocks and encoded separately during encoding, and the coded blocks will be encoded before modulation Concatenated in split order, see figure 1 . [0004] If one or more encoded blocks are decoded i...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/00
Inventor 余荣道高驰
Owner HUAWEI TECH CO LTD
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