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Data retransmission method and device

A technology for data retransmission and retransmission, which is applied in digital transmission systems, data representation error detection/correction, transmission systems, etc. Storage overhead and computational overhead, the effect of reducing decoding complexity

Active Publication Date: 2020-11-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a data retransmission method and device, which are used to solve the problems of excessive storage overhead and high decoding complexity as the number of retransmissions increases

Method used

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  • Data retransmission method and device
  • Data retransmission method and device

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Embodiment Construction

[0057] The embodiments of the present application can be applied to wireless communication systems. It should be noted that the wireless communication systems mentioned in the embodiments of the present application include but are not limited to: Narrow Band-Internet of Things (NB-IoT), Global Mobile Communication system (Global System for Mobile Communications, GSM), enhanced data rate for GSM Evolution system (Enhanced Data rate for GSM Evolution, EDGE), wideband code division multiple access system (Wideband Code Division Multiple Access, WCDMA), code division multiple access 2000 system (Code Division Multiple Access, CDMA2000), time division synchronous code division multiple access system (Time Division-Synchronization Code Division Multiple Access, TD-SCDMA), long term evolution system (Long Term Evolution, LTE) and the next generation of 5G mobile communication system three Large application scenarios include Enhanced Mobile Broadband (eMBB), URLLC and Massive Machine-T...

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Abstract

The present application provides a data retransmission method and device, the method comprising: the sending device obtains the information to be transmitted for the t time, and the information to be transmitted for the t time includes: R t extension bits and the information to be transmitted for the t‑1th time, these extension bits include M t information bits and M t L corresponding to each information bit t check bits. Then the sending device performs Polar code encoding on the information to be transmitted for the tth time to obtain the codeword encoded by the Polar code, and obtains the retransmission codeword for the t-1th time according to the codeword encoded by the Polar code, and then sends the codeword for the t-th time The codeword is retransmitted once, and the receiving device performs Polar code decoding after receiving the t‑1th retransmitted codeword, and obtains the decoding result of the codeword transmitted t times. By checking and encoding the information bits of the extension part at the encoding side, the decoding path can be reduced in the decoding process, thereby greatly reducing the decoding complexity, and reducing storage and calculation costs.

Description

technical field [0001] The present application relates to the field of wireless communication, and in particular to a data retransmission method and device. Background technique [0002] As the next-generation wireless communication technology, the fifth-generation mobile communication technology (5th-generation, 5G) has received extensive attention and research in the Third Generation Partnership Project (Third Generation Partnership Project, 3GPP) and various other international standardization organizations. , the application scenarios of 5G mobile communication systems, such as Ultra-reliable and low-latency communications (URLLC), have higher requirements, such as high reliability and low latency. Communication systems usually use channel coding to improve the reliability of data transmission and ensure the quality of communication. Polar code is the first channel coding method that can be strictly proved to "reach" the channel capacity. Polar code is a linear block co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L1/00
CPCH04L1/0057H04L1/1819H04L1/0067H03M13/13H03M13/6362H03M13/6577H04L1/1816
Inventor 赵明敏张公正徐晨李榕
Owner HUAWEI TECH CO LTD
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