基于EDA的机会监听中继选择的改进机制

机会监听中继选择机制结合了中继间监听与机会选择,可以充分利用重传机制进一步降低误包率.然而其忽视监听信道和低适应性的不足,使得该机制在某些场景中不能发挥长处.因此,提出了基于分布估计算法的改进方案,使得改进后的机制不仅考虑了监听信道对于中继选择的影响,还具备了不断自我优化的学习性能.通过仿真验证后表明,提出的方案可以进一步提升系统的性能,还具有很强的自适应能力.

Improved Opportunistic Relaying with Inter-relay Listening Scheme Using EDA

The inter-relay listening and the opportunistic listening are combined by the opportunistic relaying with inter-relay listening scheme which utilizes the retransmission probability to reduce the packet error rate.However,with the scheme’s disadvantages such as the neglect of the quality of inter-relay channels and low compliance,a good performance couldn’t be given by it in some scenes.Therefore,an improved scheme using estimation of distribution algorithms is proposed,in which the influences of quality of inter-relay channels are considered and the self-optimizing learning is provided.From the simulation,it is shown that the system performance is further improved with an adaptive capability given by the proposed scheme.