基于介数中心性重要节点的能量均衡机制

摘要

针对无线传感器网络中瓶颈节点和准瓶颈节点对网络影响的特例性问题,将重要节点的概念推广到对节点介数的研究,提出了基于介数中心性重要节点的能量均衡机制.该机制将介数值大于网络平均介数值的节点判定为重要节点,并利用重要节点的邻居节点建立缓冲机制来减少其数据的转发次数,在牺牲较少数据传输延时的情况下节省了介数中心性重要节点的能量消耗.仿真实验表明该机制能够较好地均衡无线传感器网络中的节点能耗,提高了网络生命周期.%In wireless sensor networks,the problem of the influence of the bottleneck node and the quasi bottleneck node on the network is a special case. The concept of important nodes to the study of the betweenness centrality of nodes is extended. An energy balance mechanism based on betweenness centrality important nodes is proposed. In this mechanism,we determine the node is important node which the value of betweenness centrality is more than the average value of the network. Then a buffer mechanism is established on neighbor nodes of important nodes which can reduce data forwarding times. The mechanism saves the energy consumption of important nodes in the case of less data transmission delay. Simulation results show that the proposed mechanism can well balance the energy consumption of nodes in wireless sensor networks,and improve the network lifetime.