能量异构的无线传感器网络加权无标度拓扑研究

Studies on weighted scale-free topology in energy heterogeneous wireless sensor network

针对无线传感器网络节点能耗不均和如何高效获得节点和边的负载问题,提出一种局域范围内能量异构的加权无标度拓扑演化模型.通过对节点能量与负载、能耗的关系建模,建立节点能量与点权和边权的联系,进而结合点权和加权模型给出网络的演化方式,推出点权、度和边权的幂率分布规律,最终根据网络获得的点权和边权来分析负载和能耗.仿真结果表明,提出的模型不仅能够准确计算点边的负载,而且缓解了无标度网络的节点能耗不均衡问题.

In view of the problems about imbalance of node energy consumption and obtaining the load of node or edge efficiently in wireless sensor network, a kind of weighted scale-free topological evolution model for energy heterogeneity is put forward within the scope of local areas. By modelling the relationship among the node energy, load, energy consumption, and the weight to node and edge, we then give the evolution of the network through combining node weight and weighted model, deduce the power-law distribution of the node weight, the edge weight, and node degree, respectively, and next analyze the load and energy consumption according to the node weight and edge weight. Simulation results show that the proposed model not only can make accurate calculation for node and edge loads, but also can alleviate the node energy consumption imbalance in scale-free network.