一种基于节点行为的无线传感器网络信誉计算模型

A Reputation Calculating Model Based on Node′s Behavior in Wireless Sensor Networks

针对BRSN模型在计算过程中没有考虑节点能量的不足,设计一种基于节点行为的无线传感器网络信誉计算模型.该模型在评价节点信誉时,先计算节点行为的直接信誉参数,再参考邻居节点所提供的间接信誉参数,最终和节点的能量信誉参数进行整合,得到节点的综合信誉评估值,根据其值是否大于等于规定的阀值来确定节点是否可信.仿真结果证明该模型能够更准确反映节点的可信程度,有效防止恶意诽谤,提高系统安全性、可靠性,体现网络的公平性.

For the lack of node energy in BRSN model,a reputation calculating model of wireless sensor network is designed on the basis of the node′s behavior.In order to evaluate a node′s reputation,the model firstly calculates direct trust parameters from the node′s behavior,then uses indirect trust parameters as reference,and finally integrates these parameters with energy reputation to get the synthetic reputation evaluation value.If the evaluation value is larger than or equal to the specified threshold,we can confirm the node is credible.The simulation experimental results show the model can help to identify the credit grade of the examined node so as to prevent the malicious defamation;to increase the system′s security and reliability;and to embody the impartiality of the network.