路由深度对Sink轨迹固定传感器网络的影响

无线传感器网络中,使用移动Sink进行数据采集能够减少网络节点死亡速度,延长网络时间,是最有效均衡网络负载的方法之一。在实际应用中,移动Sink通常采用固定路径策略,同时路由深度的改变直接影响网络拓扑和路由选择结果。比较了在不同路由深度下,采用4种典型固定策略的移动Sink网络的网络能耗、网络寿命和包延时。仿真结果表明:在较小的路由深度下,外边界策略能更好地降低节点能耗,延长网络寿命;内边界策略能取得更好的覆盖和较低的时延。

Effect of routing depth on sensor networks with path-fixed Sink

The use of Sink mobility in wireless sensor networks(WSNs) is commonly recognized as one of the most effective means of load balancing,ultimately leading to fewer failed nodes and longer network lifetime.When it comes to the use of mobile Sink in real-world WSNs,fixed Sink strategy is the most likely deployment model and network topology will be directly affected by routing depth.The aim of this paper is to provide a comprehensive evaluation of four typical fixed Sink strategies under different routing depth.The evaluation of the surveyed techniques is based on the traditional performance metrics(energy consumption,network lifetime,delay).Simulation results show that in smaller routing depth,the outer-periphery strategy is better to reduce the node energy consumption and prolong the network lifetime and the inner-periphery strategy can obtain better coverage and lower delay.