无线传感器网络多汇聚节点动态路径切换机制  

Dynamic path switching mechanism in multi-sink wireless sensor networks

作　　者：刘少卿[1] 陈祖爵[1] 

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《计算机工程与设计》2010年第9期1889-1892,共4页Computer Engineering and Design

基　　金：江苏省自然科学基金项目(BK2006076)

摘　　要：为了解决在具有多个汇聚节点的传感器网络中由于节点能耗不均匀而产生一些节点能量提前耗尽的问题,提出一种节点动态路径切换机制。该机制利用梯度传输协议计算出每一个节点至各汇聚节点的成本字段,选出距离各节点最近和次近的汇聚节点并进行分群。节点在信息传输时将依据上游节点电力层级进行对比,动态选取较高电力层级的上游节点作为其下一跳节点,建立到最近或次近汇聚节点的传输路径。实验结果表明,采用该机制可以在不同来源产生环境下达到延长整个网络存活时间的效果。To solve the problem of rapid depletion of some nodes as a result of uneven energy consumption in multi-sink sensor networks, a mechanism of dynamic path switching is proposed. This method adopted gradient protocol to calculate the cost field to the nearest and the sub-nearest sink node. After nearest and sub-nearest sink nodes being elected from each node, the network is further divided into clusters. The node which needed transmission would compare the power level in the upstream nodes and establish the route to the nearest or sub-nearest sink node by dynamically selecting a upstream node of a higher level as its next hop. Experimental results show that the proposed methods could be achieved under different source generation conditions to extend the survival period of the entire network.

关 键 词：无线传感器网络 多汇聚节点 能量效益 动态切换 存活时间 分群 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]