一种新型多协作中继选择协议研究

Study on a new multi-relay selection protocol in cooperative system

机会中继选择协议是一种基于即时信道状态的单协作中继选择方法。文章将机会中继的思想推广到多中继选择场景,提出一种新的中继选择协议。协议通过采用目的节点确认协作中继及加入延时等机制,有效地降低了中继选择的冲突概率,并能控制中继选择的数目,保证中继选择的公平性。协议还修正了原协议中继定时器参数选择问题。仿真表明该协议能够极大地提升系统误码率性能。

Opportunistic relaying scheme is a single cooperative relay selection method based CSI （Channel State Information）. The paper extends its idea to multi-relay selection system and proposes an improved protocol. The new protocol takes some effective measures like the destination＇s confirming the cooperative relay, the destination＇s delaying etc. The protocol can reduce collision probability effectively and control the cooperative relays＇ number, thus ensure the fairness of the relay selection. The protocol also corrects the relay＇s timer parameter. System simulation also shows the new protocol performs better than the former one in bit error rate greatly.