An opportunistic relay selection algorithm for hybrid-ARQ in wireless networks

This paper proposes a simple relay selection algorithm among Nr possible relays. The technique enhances reliability and performance of wireless communication system by retransmitting a data from the selected relay to the destination. The method finds a relay on distributed manner, i.e., no requirement of centralized node which has knowledge of whole network. The proposed algorithm is based on opportunistic feedback and channel information measured by each relay. The channel information controls the feedback parameter which affects the performance of system. Simulation result verifies performance of the proposed algorithm.