DF中继网络中的分布式机会信道接入策略

Distributed opportunistic channel access strategy in DF relay networks

针对连续传输速率下分布式机会信道接入场景设定与性能优化受限的问题,提出了离散传输速率下译码转发中继网络中的分布式机会信道接入策略.该策略在最优停止理论的指导下,将最大化系统平均吞吐率作为优化目标,通过对译码转发中继网络中的第2跳传输时间进行完全优化,使总体的传输时间大幅度减小,系统性能得到显著提高.仿真结果表明,相较现有策略,文中所提策略在系统平均吞吐率上具有明显优势.

Considering the two limitations of scenario assumption and performance optimization in distributed opportunistic channel access under the continuous transmission rate,a distributed opportunistic channel access strategy is proposed in DF relay networks under the discrete transmission rate.The proposed strategy maximizes the system average throughput with the instruction of optimal stopping theory.By optimizing the second-hop transmission time in DF relay networks completely,the total transmission time is reduced,and the system performance is improved.Compared with the current strategy,simulation result demonstrates the validity of the proposed strategy in system average throughput.