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Data retransmission method and device, computer readable storage medium, and transmitter

A data retransmission and computer technology, applied in the field of communication, can solve the problems of reduced retransmission efficiency and achieve the effect of improving retransmission efficiency

Active Publication Date: 2018-11-13
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is how to avoid the problem that the retransmission efficiency decreases as the number of retransmissions increases

Method used

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  • Data retransmission method and device, computer readable storage medium, and transmitter
  • Data retransmission method and device, computer readable storage medium, and transmitter
  • Data retransmission method and device, computer readable storage medium, and transmitter

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Embodiment Construction

[0025] figure 1 It is a schematic diagram of code block grouping in 5G. refer to figure 1 , the transmission block with the check code CRC1 can be divided into K code blocks with the check code CRC2, where K is a positive integer and an integer multiple of 2. During data transmission, the transmitter may divide two code blocks into a code block group, and the transmission block is divided into K / 2 code block groups for transmission.

[0026] Currently, during data retransmission by the transmitter, the grouping mode of the retransmitted code blocks is the same as that of the initially transmitted code blocks. As a result, as the number of retransmissions increases, the retransmission efficiency will gradually decrease.

[0027] In view of the above problems, the data retransmission method provided by the embodiment of the present invention, by setting the number of code block groups after regrouping of the code blocks to be retransmitted is less than or equal to the number o...

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PUM

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Abstract

The invention relates to a data retransmission method and device, a computer readable medium, and a transmitter. The method comprises the steps of acquiring identifier information of a code block group in which to-be-retransmitted code blocks are according to NACK information; and determining, based on the acquired identifier information of the code block group, to-be-retransmitted code blocks, and dividing the to-be-retransmitted code blocks into M code block groups and retransmitting, wherein M is less than or equal to N, both M and N are positive integers, and N represents a quantity of code block groups when code blocks of the same transmission block are transmitted last time. Through adoption of the method, the problem of lowered retransmission efficiency due to increase of retransmission times is solved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data retransmission method and device, a computer-readable medium, and a transmitter. Background technique [0002] In a Long Term Evolution (LTE) system, a transmitter usually transmits data to a receiver in units of transport blocks. Wherein, one transport block can usually be divided into multiple code blocks. When receiving the transport block, if the receiver decodes one of the code blocks incorrectly, it will feed back a negative acknowledgment (Negative Acknowledgment, NACK) message to the transmitter, and the transmitter will retransmit the transport block after receiving the NACK message. If all code blocks of the transmission block are decoded correctly, the receiver will feed back an acknowledgment (Acknowledgment, ACK) message to the transmitter, and the transmitter will continue to transmit the next transmission block after receiving the ACK message...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L1/00
CPCH04L1/0061H04L1/1607H04L1/1819
Inventor 徐志昆潘振岗
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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