The opportunistic relay selection protocol is a single cooperative relay selection method based on the real-time channel state. This paper extends the idea of opportunistic relay to the multi-relay selection scenario and proposes a new relay selection protocol. The protocol effectively reduces the conflict probability of relay selection by adopting mechanisms such as destination node confirmation of cooperative relay and adding delay, and can control the number of relay selections to ensure the fairness of relay selection. The protocol also corrects the relay timer parameter selection problem of the original protocol. Simulation shows that the protocol can greatly improve the system bit error rate performance.
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