Hybrid automatic retransmitting method based on reliability, transmitting terminal and system thereof

Abstract

The invention relates to a method for realizing hybrid automatic retransmission based on reliability, which comprises that: channel coding codewords are divided into a plurality of groups and each group is a set comprising one or more coding bits; when a coding error exists at a receiving terminal, the receiving terminal chooses a group with minimum reliability from all groups of the present codewords; the receiving terminal feeds back the position information of the group with minimum reliability and negative acknowledgement NACK signals to a sending terminal and the sending terminal is notified of coding error existing at the receiving terminal so that to start up retransmission operation; the sending terminal retransmits all coding bits in groups corresponding to the position information and corresponding redundant versions according to the position information and NACK signals fed back from the receiving terminal.

Description

technical field [0001] The present invention relates to hybrid automatic repeat request (HARQ) technology in the communication field, and more specifically, relates to a method, sending end and system for realizing reliability-based hybrid automatic repeat request, which can only add very limited feedback information Under certain conditions, the bit error rate performance is better than that of the traditional HARQ type 2 scheme, so as to achieve a better compromise between the amount of feedback information and the bit error rate performance, and further, it can reduce the number of retransmissions required by the receiving end to achieve correct decoding , to improve the overall throughput of the system, and compared with the traditional RB-HARQ scheme, it can reduce the amount of feedback information fed back to the sending end. Background technique [0002] HARQ (Hybrid Automatic Repeat Request) is a technology that combines Forward Error Correction Coding (FEC) and Aut...

AI Technical Summary

Problems solved by technology

[0010] However, traditional RB-HARQ needs to feed back the coordinates of each coded bit, especially when the code length is relatively large, the amount of information that needs to be fed back by the receiving end will become very large, thus limiting the application of this scheme

[0011] In addition, for the traditional TYPE II / III HARQ HARQ scheme, although a certain redundancy version (RV) will be retransmitted to the receiving end and improve the error correction capability of the entire codeword, in some cases due to the previous Due to the influence of erroneous bits in the received codeword, the decoding operation after retransmission will still be wrong

Although traditional RB-HARQ has high retransmission efficiency and good bit error rate performance, the information that needs to be fed back to the sender is too large, especially when the code length is long, this problem is particularly serious

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