Adaptive retransmission combining method, system and medium in wireless communication system
A wireless communication system, self-adaptive technology, applied in the direction of transmission system, digital transmission system, using the return channel for error prevention/detection, etc., can solve the problem of being affected by strong co-channel interference, etc., to improve efficiency and save HARQ buffer effect of size
Active Publication Date: 2021-12-24
合肥酷芯微电子有限公司
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[0005] When the communication system works in an unlicensed frequency band, each transmission may be affected by strong co-channel interference, including two transmissions of the same data packet. Positively improve the receiving performance, consider interference detection and signal-to-noise ratio separately, and apply it to the design of HARQ combining weights, which is rarely involved
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[0063] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0064] A method for combining adaptive retransmissions in a wireless communication system according to the present invention includes:
[0065] Signal and parameter acquisition step: For the received signal before constellation diagram mapping, judge whether the corresponding data packet is a retransmission packet: if so, the signal is not directly subjected to constellation diagram mapping, but the signal is extracted and used for retransmission Pass the merged parameters to enter the weight merge step...
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The present invention provides an adaptive retransmission combination method, system and medium in a wireless communication system, including: a signal and parameter acquisition step: for a received signal before constellation diagram mapping, determine whether the corresponding data packet is a retransmission Package: If yes, the signal is not directly mapped to the constellation diagram, but the signal and the parameters used for retransmission combination are extracted, and enters the step of weight combination; otherwise, it is uploaded directly. The present invention proposes to use the signal before the constellation diagram mapping as the merging node for HARQ merging. Compared with the HARQ cache in the traditional technology, which stores the soft bits before decoding, considering the high-order modulation, one signal corresponds to multiple soft bits, which can effectively save the size of the HARQ cache; The present invention is based on the principle of improving the weight of gain combining, considering factors such as co-channel interference / signal-to-noise ratio change / maximum ratio combining times, etc., and designs a retransmission combining scheme for various scenarios, thereby improving retransmission combining from multiple angles s efficiency.
Description
technical field [0001] The present invention relates to the technical field of physical layer algorithms in a wireless communication system, in particular to an adaptive retransmission combining method, system and medium in a wireless communication system. Background technique [0002] The automatic retransmission mechanism is a technology that combines FEC (Forward Error Correction) and ARQ (Automatic Repeat reQuest) methods. If the CRC check of the FEC at the receiving end is wrong, based on the ARQ mechanism, a NACK is sent to the sending end, requesting the sending end to resend the data; if the CRC check is correct and the reception is successful, an ACK is sent to inform the sending end; generally, the maximum The number of retransmissions. Automatic retransmission is generally also called HARQ (Hybrid Automatic RepeatreQuest, hybrid automatic repeat request), and one of the commonly used combining techniques is Chase Combining (CHASE), that is, after retransmission i...
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IPC IPC(8): H04L1/18
CPCH04L1/1845H04L1/1835H04L1/1812
Inventor张玉龙方腾龙
Owner合肥酷芯微电子有限公司