A Novel Scheme of Multi-node Cooperation in Wireless Networks

Many previous schemes of multi-node cooperation mimic the behavior of the multiple-antenna system, and the imitation usually causes extra overheads. In this paper, we propose a novel multi-node cooperation scheme to avoid the imitation. The basic idea is to take the wireless broadcast advantage in the whole procedure. As a result, each source could maintain a multihop diversity route to the destination. Both theoretical analysis and simulation results confirm that the proposed scheme achieves full diversity. Furthermore, we compare the proposed scheme with DSTC and the selection cooperation in terms of outage probability through simulation. In the symmetric scenario, we prove that the proposed scheme outperforms the DSTC and has a comparable performance with the selection cooperation but without the overhead in choosing the best relay. While in the asymmetric scenario, the proposed scheme behaves better than the selection cooperation with the knowledge of the topology, through minimizing the performance gaps between different sources.