Exact Diversity-Multiplexing-Delay Tradeoff of Diffusion Selection Cooperation Networks with ARQ

Selection cooperation is an effective solution for cooperative communications and the automatic repeat request (ARQ) protocol can provide additional diversity gain for wireless networks. In this work, considering a large network where direct transmissions only exist in the neighbors of each node, we investigate an improved diffusion selection cooperation protocol integrated with ARQ, and taking into account of the case that neighbors of the destination join cooperation at each ARQ retransmission. As a result, it can provide a complete insight into the performance analysis of the improved protocol. Moreover, the exact diversity-multiplexing-delay (D-M-D) tradeoff for each round of retransmission is derived. And the simulation results validate the accuracy of the improved scheme.