摘要
研究无线传感器网络节点自定位问题,由于传感器节点固定能量有限,给识别定位一路带来困难。针对无线传感器中,节点定位误差较大,精确度不高等问题缺陷,提出了一种跳数和RSSI测距技术的DV-Hop定位算法,可有效利用每跳的统计信息并结合RSSI测距技术,在不增加传感器节点的硬件开销的基础上有效提高定位精度和扩大定位范围。仿真结果表明,改进算法在不同的节点比例和节点数的情况下,定位误差小和定位范围广等性能,与原始的DV-Hop定位算法相比定位误差明显减小,精度明显提高。表明算法是一种高效节能的定位算法。
Study the self-localization problem of wireless sensor network node.In wireless sensor networks,the node localization errors are larg and precision is not high.A hop and RSSI based ranging technology,DV-Hop localization algorithm was proposed in the paper.The mapping algorithm can make use of every combination of jump statistics and RSSI ranging technique,improve positioning accuracy and expand the scope without increasing the hardware cost of sensor nodes.Simulation results show that in different proportion and number of nodes,the location error of the algorithm is small and the positioning range is wide.Campared with the original DV-Hop localization algorithm,the positioning error can be reduced significantly and the accuracy can be improved significantly.The algorithm is an energy efficient location method.
出处
《计算机仿真》
CSCD
北大核心
2011年第12期122-125,共4页
Computer Simulation
关键词
无线传感器网络
跳数
定位
Wireless sensor networks（WSN）
Hop
Location
