目的端控制中继协同ARQ策略研究

提出了一种新的中继协同Rayleigh衰落ARQ策略:基于目的端中断概率的目的端控制ARQ策略.此策略根据性能需求预先设定信噪比门限,由目的端瞬时信噪比是否低于此门限即是否中断决定是否重传.当高于此门限时不需重传,大大减小时延.块衰落下的理论分析和仿真结果表明,源和中继的上行链路质量越差,目的端平均接收信噪比越小,ARQ带来的性能增益越大.

Destination-controlled ARQ Strategy for Relay Cooperative System

A novel ARQ (Automatic Repeat reQuest) protocol for relay cooperative Rayleigh fading system was proposed, which is the destination-controlled protocol, and the control is based on the outage probability. In this protocol, a SNR threshold is set according to the performance requirement, retransmission depending on whether instantaneous received SNR of relay is higher than the threshold or not, that is outage or not. If higher, retransmission is not needed, that will reduce the system time delay. Numerical analysis and simulation under the block fading channel show that when the uplink qualities of the source and relay are worse, the average received SNR of the destination is lower, the system performance can be improved efficiently.