Virtual MIMO Multicast-based Multihop Transmission Scheme for Wireless Sensor Networks
Virtual MIMO technique can greatly reduce the fading effect of wireless link,and save transmission energy.In this paper,we proposed a new virtual MIMO multihop transmission scheme(VMMM) by combining MIMO multicast with LEACH protocol.Through avoiding intra-cluster broadcast in multi-hop data forwarding process,this transmission scheme can improve the energy efficiency of sensor networks.In order to optimize the performance of VMMM,we first analyzed the energy consumption of this scheme,and then developed a jointly optimization model to determine the optimum network parameters.Simulation results show that compared with the previous virtual MIMO multi-hop transmission scheme(vMISO protocol),the proposed scheme significantly improves the energy efficiency,and prolong the network lifetime by at least 50%.