【摘要】 针对现有无线局域网MAC层协作通信的不足,提出一种根据即时信道信息选择最优中继的策略,引入固定退避时隙和改进的随机退避时隙解决中继碰撞问题,增加CTC(Compete to Clear,取消竞争)控制帧来协调源-中继-目的节点三者之间的关系。本文以吞吐量和服务延迟为性能指标对新算法和现有MAC算法进行仿真和比较,结果表明新算法能够带来网络性能的显著提升。更多还原

【Abstract】 In order to solve the deficiency of current MAC cooperative protocols,this paper proposed an improved method to select the best helper according to the instantaneous channel information.Fixed back off and modified random back off slot are imported to solve the collision problem,besides,CTC control frame is added to coordinate the relationship of the source-helper-destination nodes.Simulation and contrast are given for the new and current algorithms with the throughput and service delay specification.It turns out that new algorithm can raise the network performance significantly.更多还原