基于再生技术的无线传感器网络容侵拓扑控制方法

Self-Regeneration Based Method for Topology Control with Intrusion Tolerance in Wireless Sensor Networks

面对入侵时如何生成一个具有较高容侵能力的拓扑,在节点能源都会耗尽时如何维持一个可用的网络拓扑是布置在不可照料环境下的无线传感器网络拓扑面临着的两个关键问题.针对这两个问题,提出了一种基于再生技术的容侵拓扑控制方法,该方法被证明为可生成具有较强容侵能力的拓扑结构,同时将不断播撒进入部署区域的新增节点视为网络的可更新资源,以一代代再生网络的方式补充网络的可用能量以延长网络的生存期.仿真实验分析了拓扑控制方法中的一些参数特征及其在延长网络的生存期方面的性能,并与相关工作进行了比较.

Two key problems of topology controlling are pointed out for unattended wireless sensor networks which are deployed in hostile region. Firstly, how to get an intrusion-tolerant architecture with intrusion in existence; Secondly, how to sustain a connected network when all deployed nodes will be exhausted ultimately. To solve these two problems, A novel approach for topology control is presented, which disassembles into three phases, such as topology discovery, topology update and topology regeneration. In topology discovery phase, a tricolor based method is proposed to build ~lrchitecture with high tolerance ability, in which black nodes are selected as cluster and grey nodes are in dormancy, so the networks are sparse and tolerant. In update and regeneration phases, the newly deployed nodes are regarded as renewable resource to replace the failure nodes, fill in the consumed energy, enhance the debased tolerance, and prolong network life. The topology constructed by this approach is proved to be intrusion tolerant. Some attributes of the integrated method are shown by simulations, such as the parameter of distribution of cluster head, the relation between the density of nodes and the number of clusters, and the advantage of replenishing residual energy. Finally, the differences of that from related work are given by comparison.