A new scaling law on throughput and delay performance of wireless mobile relay networks over parallel fading channels

In this paper, utilizing the relay buffers, we propose an opportunistic decode-wait-and-forward relay scheme for a point-to-point communication system with a half-duplexing mobile relay network. The proposed scheme achieves the maximum throughput of ¿(log K) at a cost of O(1) total transmission power and O(K/q) average end-to-end packet delay, where 0 < q ¿ ¿ measures the speed of relays´ mobility. It can be proved that this system throughput is unattainable for the existing designs with low relay mobility. Therefore, the proposed relay scheme can exploit the time diversity and relays´ mobility more efficiently.