确定性无线传感器网络定向扩散路由协议

Novel deterministic directed diffusion routing protocol for WSNs

提出了一种新的确定性无线传感器网络定向扩散路由协议以延长网络生存期.Sink以泛洪方式周期性地广播Interest,网络节点依据收到Interest的时间先后设置与邻近节点的梯度值,最先到达的梯度值最大.选择梯度最大方向上的节点建立数据传输路径.通过调整剩余能量的阈值限制低能量节点加入路径以均衡节点能耗.定性分析和仿真结果表明,在单sink单事件及多sink多事件应用场合,所提出的协议在能耗及可靠性方面均优于定向扩散协议,且更易于实际实现.同时定性分析还说明所提协议能获得更好的时延及时延抖动性能.

A novel deterministic directed diffusion routing protocol was proposed for wireless sensor networks （WSNs） to prolong network lifetime. The sink broadcasted its Interest periodically in flooding fashion. A node set up its gradients towards the neighbor nodes in the arrival order of Interest from them, the earlier arrival the larger gradient. The node toward by the maximum gradient was selected to form a path from the source to the sink. The node energy consumption was balanced by adjusting the energy threshold to preserve lower energy nodes from joining the path. Qualitative analysis and simulation results show that the proposed routing protocol can achieve better performance in terms of energy consumption and reliability than the directed diffusion protocol in the cases of single-sink-single-event and multi-sink-multi-event respectively, and it is easier to practical implement. Analytic discussion also illuminates that the proposed routing protocol has better performance in terms of delay and jitter.