An adaptive cross-carrier hybrid automatic repeat request processing method and application

Abstract

The invention belongs to the technical field of digital information transmission, and discloses an adaptive cross-carrier hybrid automatic repeat request processing method and system. The method comprises the steps that high-frequency-band data transmission is carried out, and the data is aggregated through a special A-MPDU; new transmission and retransmission information transmission is carried out; a receiver receives the data and carries out BA feedback, a the sender selects a retransmission scheme and carries out retransmission indication according to the BA feedback information; and the receiver receives redundant information of the retransmitted error data according to the instruction, judges a corresponding relationship between the retransmitted information and the error informationreceived last time, combines the retransmitted redundant information with the data received last time, and performs combined decoding. According to the invention, an adaptive cross-carrier retransmission HARQ scheme is adopted, the retransmission information adaptively selects high-frequency-band same-frequency transmission or cross-carrier low-frequency transmission according to the direction ofthe data currently transmitted in the high frequency band, retransmission does not need to wait for the completion of new transmission, and the retransmission time delay is reduced.

Description

technical field [0001] The invention belongs to the technical field of digital information transmission, in particular to an adaptive cross-carrier hybrid automatic repeat request processing method and application. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: HARQ (Hybrid Automatic Repeat Request) is a technology that combines FEC (Forward Error Correction) and ARQ (Automatic Repeat Request) methods. FEC enables the receiving end to correct some errors by adding redundant information, thereby reducing the number of retransmissions. For errors that cannot be corrected by FEC, the receiving end will request the sending end to resend data through the ARQ mechanism. The receiving end uses an error detection code, usually a CRC check, to detect whether the received data packet has an error. If there is no error, the receiving end will send a positive acknowledgment (ACK) to the sending end, and the sending end wi...

AI Technical Summary

Problems solved by technology

[0013] To sum up, the problems existing in the existing technology are: the existing HARQ technology in LTE needs to adopt multi-channel technology, and the MPDU and scrambling code blocks are inconsistent, which is not conducive to HARQ retransmission

Moreover, retransmission and new transmission cannot be carried out synchronously in the existing technology, and retransmission-related operations cannot be performed during new transmission, which will increase unnecessary delay

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