一种新型的WSAN两层协作路由协议

New Two-layer Cooperative Routing Protocol in WSAN

在WSN网络中引入执行器节点构成WSAN网络,并依据WSAN网络特性提出一种新的协作路由协议———基于动态分簇的角度转发路由协议AFRPDC(Angle Forwarding Routing Protocol base on Dynamic Clustering)。AFRPDC协议由2部分算法组成:基于接收信号强度RSSI(Received Signal Strength Indication)的动态分簇算法BRCA(Based on RSSI Dynamic Clustering Algorithm)和角度转发路由协议AFRP(Angle Forwarding Routing Protocol)。BRCA算法保证传感器节点形成较为稳定的拓扑,实现传感器节点与簇头节点的协作;AFRP协议利用簇头节点的角度信息转发事件报告,实现簇头节点与执行器节点的协作通信。仿真结果表明,AFRPDC协议中节点分簇有较好的稳定性,同时AFRPDC较基于链路状态分簇的定向扩散协议DDLSC在降低平均时延和节点能耗方面有更好的表现,可满足WSAN网络对实时性、可靠性和低能耗的要求。

Wireless sensor and actor network （WSAN） was derived from WSN by adding actor nodes which would make decisions and executive scheduled tasks, and a new cooperative routing protocol based on the characteristics of WSAN network was propose^the angle forwarding routing protocol based on dynamic clustering （AFRPDC）, which consists of a RSSI-based dynamic clustering algorithm （BRCA） and an angle forwarding routing protocol （AFRP）. The cluster-head election was improved and the stable topology was constructed in BRCA. Then, event data was transmitted directly to cluster-head nodes by sensor nodes using peer-to-peer communications, and was reported to actor nodes by cluster-head nodes with AFRP. Next-hop nodes were selected using angle informations and multi-path routings were found from source cluster-head nodes to actor nodes. The routing path with minimum delay was established when trans- fering event data. The simulation results show that the proposed cooperative routing protocol has better perfor-mance than the directed diffusion protocol based on link-state clustering （DDLSC） in reducing the latency and power consump- tion,and prove that the protocol could meet the requirements of real-time, reliability and low energy comsumption in WSAN.