介入移动汇聚节点的无线传感器网络高效数据收集方法

An efficient data collection method by mobile sink node in wireless sensor networks

引入移动汇聚节点解决无线传感器网络高效数据收集问题.网络中固定汇聚节点与移动汇聚节点共存,全部传感器节点都拥有维护到固定汇聚节点的路由,移动汇聚节点进入网络后定期向其附近小范围内的传感器节点扩散自己的声明信息,传感器节点向距自己跳数最小的汇聚节点发送或转发数据包.移动汇聚节点和距离其一跳的传感器节点之间通过有效的应答机制来保证数据的可靠传输.通过仿真结果显示引入移动汇聚节点的数据收集在节省能耗方面明显优于传统网络.在延长网络生存时间的同时,可以获得较高的数据传输成功率和较短的数据传输延迟.

We introduce mobile sink node to improve energy efficient data collection in a sensor network,where static and mobile sink nodes coexist.All the sensor nodes maintain information of routing to the static sinks.Mobile sink nodes broadcast location update information to adjacent sensor nodes periodically.Sensor nodes send or forward data packets to the nearest sink or mobile sink node with minimum hop counts.The success rate of data delivery is guaranteed efficiently with acknowledge mechanism.Simulation results show that our approach can decrease energy consumption significantly compared to the traditional network approach.It can extend the network lifetime,achieve the higher success rate of data delivery and the lower delay of data transmission.