RFID和WSN融合网中的能耗优化

Energy Consumption Optimization in RFID and WSN Integrated Network

为了提高融合网络的生存时长,提出一种节点轮换休眠策略和分簇路由协议相结合的优化方法。通过分析节点轮换休眠算法发现基于退避时间休眠策略所得到的休眠节点集与无退避时间的休眠策略最终所得到的休眠节点集之间存在差集,这里称为盲休眠节点。节点轮换休眠策略中的盲休眠节点作为分簇路由协议中簇首选择的调节函数的一个影响因子,根据邻居节点中盲休眠节点的数量影响被选为簇首的概率。在节点轮换休眠策略中对休眠的判断条件进行了范围优化,使判定条件更全面精确,可有效降低采集信息的冗余度。将基于节点覆盖策略和分簇路由协议的累加算法与基于节点覆盖策略和路由协议的融合算法分别在相同条件下进行实验仿真,结果表明在基于节点覆盖策略和路由协议的融合算法下融合网络的生存时长得到有效的提升,能耗均衡系数得以降低。

In order to improve the survival time of the fusion network, an optimization method with combination of node rotation sleep strategy and clustering routing protocol is proposed. By analysis of the node rotation sleep algorithm, it is found that the difference set have existed between the dormant node set based on the backoff time sleep strategy and that based on sleep strategy with no backoff time, which is called blind sleep node. The blind sleep node in the node rotation strategy as an influence factor of the adjustment function affects the probablity of being selected as the cluster head according to the number of blind sleep nodes in the neighbor node. In the node rotation sleep strategy, the judgment condition of hibernation is optimized, which makes it more accurate and can reduce the redundancy of the col- lected information effectively. The algorithm based on node overlay strategy and clustering routing protocol and fusion algorithm based on node coverage strategy and routing protocol are simulated respectively in same environment. The results show that the latter is effectively lifting on lifetime of fushion network and its energy consumption balance coefficient is lowerd.