Adaptive IR-HARQ transmission method and system of 5G polarization code

Abstract

The invention discloses a self-adaptive IR-HARQ transmission method of a 5G polarization code. The method comprises the following steps: a sending end sends a polarization coding symbol; a receiving end carries out decoding based on the log-likelihood ratio of the polarization coded symbol; when the decoding result CRC verification is not passed, the receiving end feeds back a symbol bit needing to be retransmitted to the sending end at least once, so that the sending end intercepts a retransmission symbol from the punching bit every time and returns the retransmission symbol to the receiving end; when a receiving end receives a retransmission symbol, decoding based on the log-likelihood ratio of all received symbols; if the CRC verification of the decoding result is passed, transmission is completed; if the verification is not passed, feeding back the symbol digits needing to be retransmitted to the sending end again; wherein when the receiving end feeds back the symbol bits needing to be retransmitted to the sending end every time, the symbol bits needing to be retransmitted this time are calculated based on the decoding reliability of the current decoding result. According to the invention, IR-HARQ is combined with the 5G polarization code, so that the communication time delay is reduced.

Description

technical field [0001] The invention belongs to the field of communication technology, and in particular relates to an adaptive IR-HARQ (Incremental Redundancy-Hybrid Automatic Repeat Request, Incremental Redundancy-Hybrid Automatic Repeat Request) transmission method and system of 5G polar codes. Background technique [0002] HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) technology is a technology formed by combining forward error correction coding and automatic repeat request. In this technology, when the decoding fails, the receiving end saves the received data and asks the sending end to retransmit the data, and the receiving end combines the retransmitted data with the previously received data before decoding. On the basis of HARQ technology, IR-HARQ technology can greatly increase the throughput of the system, while reducing the frame error rate and improving the success rate of communication transmission. Therefore, if the IR-HARQ technology...

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Problems solved by technology

[0003] In related technologies, a paper published in "IEEE Communications Letters" titled "A hybridARQ scheme based on Polarcodes" with a retrieval number of 13875572 discloses an incrementally redundant hybrid automatic repeat request based on polar codes scheme; in this scheme, the new information bits are retransmitted using the incremental redundancy hybrid automatic repeat request mechanism, and the data of the previous transmission is used; however, this method confirms whether it needs Retransmission, the calculation process is more complicated, and it is easy to cause communication delay; and when the method confirms the number of information bits that need to be retransmitted, it needs to determine the number of information bits that need to be retransmitted by exhaustive search, and the amount of calculation is large , resulting in a higher communication delay

Therefore, how to combine the IR-HARQ technology with the polar code in 5G, reduce the communication delay, and further improve the performance of the 5G mobile communication system, there is no practical solution in the existing technology

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