基于混合汇聚节点的无线传感器网络数据收集方法  

A data collection method with hybrid sinks in wireless sensor networks

作　　者：马奎[1] 黄河清[2] 沈杰[2] 姚道远[2] 刘海涛[2] 阴泽杰[1] 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《光学精密工程》2008年第9期1752-1758,共7页Optics and Precision Engineering

基　　金：国家863目标导向类项目(No.2007AA01Z2A8);中科院知识创新工程重要方向项目(No.KGCX2-YW-110-2)

摘　　要：考虑固定传感器网络中固定与移动汇聚节点共存的工作模式,提出了一种数据收集方法。在兼容网络原有固定汇聚节点模式的同时,支持一个到多个移动汇聚节点,移动汇聚节点定期地向其附近小范围内的传感器节点扩散自己的存在信息,传感器节点向离自己跳数最小的汇聚节点发送或者转发数据包。距离移动汇聚节点一跳的传感器节点通过应答-超时重传的方法来保证到移动汇聚节点的数据可靠传输。仿真研究表明:相对于传统固定传感器网络,使用该方法能够大幅度地延长网络寿命(正常流量情况下延长600%以上,大流量情况下延长350%以上);在网络高负载时最高数据传输成功率能达到91%,比节点全静止时提高了8.3倍,最低数据传输延迟仅为46.5 ms,比节点全静止时减小了92%。A data collection method is proposed to support hybrid sink mode in wireless sensor networks where static and mobile sinks coexist. One or more mobile sinks cooperate with the static sinks to broadcast status update periodically only to a subset of sensor adjacent nodes, Then, the sensor nodes send or transmit data packets to the nearest sink in hop counts. The correct data transmission between the mobile sinks and the last hop sensor node is guaranteed by using ACK-RETRANSMIT method. Simulation result shows that the network lifetime has been improved with the increase of the number of mobile sinks. When the ratio of the mobile sinks to the sensor nodes is above 7.5 %, more than 600% lifetime improvement can be achieved. When the load of network is high, the maximum success rate of data transmission reaches to 91%, which has increased by 8.3 times as compared with that of the network in only one static sink,meanwhile, data transmission delay remains at a low level.

关 键 词：无线传感器网络 移动汇聚节点 混合汇聚节点 数据收集 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]