Method and device for processing HARQ (Hybrid Automatic Repeat Request) in spatial multiplexing mode

Abstract

The invention provides a method and device for processing an HARQ (Hybrid Automatic Repeat Request) in a spatial multiplexing mode. The method comprises the following steps of: storing layer number and modulation and coding scheme (MCS) parameters used by new transmission of a transport block (TB) for HARQ transmission of user equipment (UE) as well as the retransmission times of each TB, and receiving and storing rank indication and channel quality indication information latterly reported by the UE by a base station; performing rank self-adaptive processing by the base station to obtain a layer used at a current transmission time interval (TTI) of the UE; and determining the TB of the HARQ waiting to be retransmitted at the current TTI of the UE and the MCS used by each TB according to the layer number and the MCS parameters used by new transmission of the TB transmitted by the HARQ of the UE, the retransmission times of each TB, the rank indication and channel quality indication information latterly reported by the UE and the layer used at the current TTI of the UE, obtained by rank self-adaptive processing. According to the method and the device, the retransmission time delay of the TB can be shortened.

Description

technical field [0001] The present invention relates to the communication field, in particular to a HARQ retransmission processing method and device in a spatial multiplexing mode. Background technique [0002] MIMO (Multi-input Multi-output, multiple input multiple output) is the use of multiple (N T ) transmit antenna and multiple (N R ) The wireless transmission technology of the receiving antenna, which can effectively improve the capacity of the wireless network and the transmission performance of the link. by N T Launch and N R The MIMO channel formed by the receiving antennas (using the matrix Indicates) can be decomposed into N S Independent channels, in the LTE (Long Term Evolution, long-term evolution) system, called Rank (rank) on the UE (User Equipment, user equipment) side, called Layer (layer) on the network side, and N S ≤min{N T , N R}. [0003] There are two main ways to realize MIMO technology: space diversity and space multiplexing. In the LTE s...

AI Technical Summary

Problems solved by technology

This processing may lead to the following two problems: Problem 1: When the SINR (Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio) required by the retransmitted TB block is smaller than the SINR of

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