基于正方形区域的WSAN节点定位算法的研究  

Research on Node Localization Algrithom Based on Square Area in Wireless Sensor and Actor Network

作　　者：徐焕良[1] 李多[1] 任守纲[1] 方贺贺[1] 王浩云[1] 

机构地区：[1]南京农业大学信息科技学院,南京210095

出　　处：《计算机科学》2013年第10期77-82,共6页Computer Science

基　　金：国家科技部重大科技支撑计划(2011BAK21B05);国家农业科技成果转化资金项目(2011GB2C100001);江苏省科技支撑计划项目(BE2011398);江苏省科技支撑计划项目(BE2011339);南京农业大学青年科技创新基金项目(KJ2010022);中央高校基本科研业务费项目(Y0201100080);南京农业大学2013年国家大学生创新创业训练计划项目(201310307049)资助

摘　　要：在WSAN中,执行器节点可根据传感器节点感知的数据做出决策并执行相关操作,因此其对感知到事件的传感器节点的准确定位对于实施精确的控制策略至关重要。区别于现有WSN中的非测距定位方式,利用移动的执行器节点代替WSN中的锚节点,提出了一种基于正方形区域的WSAN节点定位算法。首先通过执行器节点的移动确定待定位传感器节点所在区域,然后通过迭代不断缩小该区域,当满足定位精度要求时计算区域的质心作为待定位节点的坐标。仿真实验证明,算法能够在存在RSSI误差和GPS误差干扰的情况下取得较好的定位精度,且使用少量的执行器节点完成定位不仅能节省网络部署成本,还可以克服传统WSN中非测距定位算法严重依赖锚节点密度的不足。In WSAN, actors make decisions and execute appropriate actions according to the data gathered from sen-sors. So accurate positioning of sensors that perceive the events is very important to implementing exact control policy. Different from those range-free algrithoms in WSN, a mobile location algrithom based on square area was proposed in WSAN. It used mobile actors instead of anchors to locate sensors. First, the area of the unknown node was determined through the movement of actors, secondly, this area decreased through iteration, when precision was satisfied, the cen-troid of this area was calculated and treated as coordinate of the unknown node. Via simulation experiments, the alg-rithom is proven to have a good locating accuracy when RSSI error and GPS error exist, and localizing unknown nodes with a few actors can not only save the cost of network deployment, but also can overcome shortcomings of range-free location algrithoms in WSN,which seriously depend on density of anchors.

关 键 词：无线传感执行网络 无线传感器网络 移动执行器 非测距定位 区域划分 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]