Harq Method for Adaptive Adjustment of Code Block Group Size in Satellite Communication System

Abstract

An embodiment of the present invention provides a HARQ method for adaptively adjusting the size of a code block group in a satellite communication system, which is applied to a user terminal of the satellite communication system and receives at least one code block group sent by a satellite in a retransmission process; based on When the decoding result of each code block group is successfully decoded, when the cache processing of the code block group is completed, the current cache space size of the user terminal and the segmentation granularity of this retransmission process are obtained; if the current cache space size is Full state, select a pre-stored segmentation granularity smaller than the segmentation granularity of this retransmission process from multiple pre-stored segmentation granularities, and feed back the selected pre-stored segmentation granularity to the satellite, so that the satellite will receive the pre-stored segmentation granularity as the next The split granularity of the retransmission process. This scheme can reduce the problem of the transmission performance degradation of the satellite communication system caused by continuous decoding errors.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a HARQ method for adaptively adjusting the size of a code block group in a satellite communication system. Background technique [0002] At present, the terrestrial mobile communication network has entered the 5G era, and the large coverage capability of satellite communication can effectively supplement and expand the dense 5G terrestrial network. In order to deal with the problem of reduced satellite communication reliability caused by long transmission distance and large link attenuation of satellite communication links, Hybrid Automatic RepeatreQuest (HARQ) technology can be used to improve satellite communication reliability. [0003] Among them, the HARQ method may include: when the user terminal in the satellite communication system fails to decode the data sent by the satellite, the data that fails to be decoded is used as error data, and the retransmissio...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a HARQ method for self-adaptive adjustment of the code block group size in a satellite communication system, so as to reduce the problem of decreased transmission performance of the satellite communication system caused by continuous decoding errors

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