基于虚拟MIMO的无线传感网数据传输策略

Data Transmission Strategy for Wireless Sensor Network Based on Virtual MIMO

基于无线传感网的虚拟多输入多输出(multi-input multi-output,MIMO)技术,结合分簇多跳传输模式进行全网的数据传输,根据分簇算法得到每一个簇的簇头,利用协作传输方式,将数据传输至相邻簇头.在进行数据传输时,综合考虑网络的电路能耗与传输能耗,推导出簇间传输的最小能耗为发送方簇的协作节点个数Mt的表达式,从而得到到达汇聚节点的最优路径.基于最小簇间能耗的协作虚拟MIMO多跳传输策略不需要接收端协同,避免了接收端协同的复杂性,同时从整个网络生存周期角度出发,节省更多的网络能耗.仿真结果表明,该策略在轮次增加或者簇间距离变化的情况下,都能得到较好的节能效果,从而延长网络的生存周期.

Data transmission for the entire network based on virtual MIMO （multi-input-multi-output） wireless sensor network structure in multi-hop clusters was studied in the system. Each cluster＇s head was formed according to the clustering algorithm, and data transmitted to the adjacent cluster＇s head by cooperative communication. The circuit energy consumption and the transmission energy consumption were both considered when data was transmitted in the system, so that M,, with the minimum energy consumption and the best numbers of cooperative nodes in the transmitter cluster, was acquired, and the optimal path to the Sink node obtained. The proposed strategy does not need the receiver＇s collaboration so that it is free of the complexity to coordinate the receiver and much energy-efficient from the perspective of the network life cycle. Simulation results show that the proposed strategy has good energy-saving effect and network lifecycle extending results whether with increased rounds or varied inter-cluster distance.