移动传感网中一种基于RSSI的机会主义路由设计

An Opportunistic Routing for Mobile Wireless Sensor Networks Based on RSSI

本文针对移动无线传感网提出一种结合节点移动向量和接收信号强度指示值RSSI(Received Signal Strength Indicator)信息的机会主义路由OR-RSSI,利用Sink节点Beacon报文的RSSI信息建立并更新机会概率值,使用报文广播后所能到达的具有最大机会概率值的最佳节点进行存储转发,完成移动无线传感网信息收集.OR-RSSI是一种良好的后择路由,不以既存路径为基础,不需额外设备支持,具有报文成功传输率高、网络有效吞吐量大以及能耗低等优点.

In Mobile Wireless Sensor Networks （MWSN） with a sparse node population,an end-to-end path may be broken frequently or may not exist at any time due to nodes＇ mobility, which makes it impossible to apply the existing shortest-path routing protocols based on static topology for MWSN. An RSSI-based opportunistic routing protocol for MWSN, called OR-RSSI, is proposed in this paper.In OR-RSSI, Opportunistic Probability（OP）based on the RSSI of the Sink＇s Beacon packets and Mobility Vector （MV） is established and the best node with the highest OP is chosen to store and relay packets at each hop after packets are broadcasted.Simulation results show that OR-RSSI performs better on successful delivery ratio, goodput and energy overhead as compared with traditional TinyAODV.