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针对分簇无线传感器网络提出了一种基于虚拟天线阵列的协作算法. 该算法通过节点间的协作来提高网络连通性,所有节点均按照泊松Voronoi网格模型进行分簇,簇首根据通信链路决定是否激活节点协作;若节点协作算法被激活,簇首从其成员中选择适合的节点作为协作节点共同组成虚拟天线阵列.通过协作,可扩展簇间的通信范围从而与远方节点直接通信以避免出现通信覆盖盲区,或者可补偿信道增益以防止由于信道深衰落所导致的传输失败.仿真结果表明,协作算法在通信过程中具有更好的连通性及能量效率,可有效降低接收端的丢包率,维持网络的连通性,从而延长网络的工作时间.
A collaborative algorithm based on virtual antenna array is proposed for clustering wireless sensor network.This algorithm improves network connectivity by coordinating nodes, all nodes are clustered according to Poisson Voronoi grid model, If the node cooperation algorithm is activated, the cluster head selects suitable nodes from its members as the cooperating nodes to form a virtual antenna array, and through cooperation, the communication range between the clusters can be expanded so as to directly communicate with the distant nodes Avoiding blind spots in communication coverage or compensating for channel gain to prevent transmission failure due to deep fading of the channel.The simulation results show that the cooperation algorithm has better connectivity and energy efficiency in the communication process and can effectively reduce packet loss at the receiving end Rate, maintain the network connectivity, thereby extending the network’s working hours.