Relaying method and device based on bit rearrangement

Abstract

Disclosed are a relaying method and device based on bit rearrangement. The invention provides a method for relaying multi-stage quadrature amplitude modulated signals sent by second equipment in first equipment in a wireless communication system, and the method includes receiving initial multi-stage quadrature amplitude modulated signals sent by the second equipment; decoding the signals to acquire initial a symbol sequence comprising at least one symbol comprising one bit sequence comprising a front part and a rear part which are different in reliability; rearranging the front part and rear part of the bit sequence to allow the position corresponding to the front part to contain at least one bit in the rear part and position corresponding to the rear part to contain at least one bit in the front part in the bit sequence in the symbol after rearranging; forming a rearranged symbol sequence according to the arranged symbol; coding the rearranged symbol sequence to acquire and send rearranged multi-stage quadrature amplitude modulated signals.

Description

technical field [0001] The present invention relates to the field of wireless communication technology, in particular to the field of relay cooperative transmission. Background technique [0002] As one of the basic functions determined by LTE-Advanced, the subsequent development of LTE, the relay cooperative transmission technology has received widespread attention. Its main feature is that it can enable mobile terminals that are difficult to adopt multi-antenna technology to obtain transmit diversity gain, thereby overcoming the adverse effects of fading channels on wireless communication systems. [0003] The relay cooperative transmission method used in the existing 3G / LTE wireless communication system is mainly decode-and-forward (abbreviated as DF). The forwarding process of this method is shown in Figure 1, and mainly includes two stages: as shown in Figure 1(a), in the first stage, the sending end (such as a user terminal, UE) sends the data packet to the receiving ...

AI Technical Summary

Problems solved by technology

However, such methods based on constellation reorganization are not suitable for the actual application scenarios of current relay cooperative transmission.

The main reasons include: first, corresponding control signaling and feedback signals from the receiving end are required to indicate how to perform constellation reorganization, while the cooperative relay transmission method is direct forwarding, and there is no step of receiving feedback before sending; second, the existing 3GPP The specification has clearly specified the constellation diagrams used for each order of QAM modulation. The use of constellation diagrams outside the specification may cause equipment compatibility issues. In addition, this method requires the receiving end and RN to store all possible constellation diagrams, while the cooperative relay transmission A major advantage is that a certain UE can act as the RN. In the case of the UE acting as the RN, storing all possible constellation diagrams increases the storage requirements of the terminal equipment for the UE and increases the cost; third, this type of method requires Finding the optimal constellation diagram through a complex search algorithm increases the requirements for the RN's computing power, and it is also not applicable to the situation where the UE acts as the RN

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