基于改进单锚节点的无线传感器网络节点定位算法

NODE LOCALISATION ALGORITHM IN WIRELESS SENSOR NETWORKS BASED ON IMPROVED SINGLE ANCHOR NODE

节点定位是无线传感器关键技术之一。针对固定多锚节点方法定位精度低的缺陷,为了提高无线传感器的定位精度,提出一种基于改进单锚节点的无线传感器网络节点定位算法(SFOA-SVM)。首先采用单移动锚节点在无线传感器网络中移动,构建无线传感器定位模型的学习样本,然后采用SVM构建节点定位模型,并采用渔夫捕鱼算法模拟渔夫捕鱼行为找到最优SVM参数,最后采用仿真实验测试节点的定位性能。结果表明,相对于其他定位算法,SFOA-SVM提高了无线传感器节点的定位精度,具有一定的实际应用价值。

Node localisation is one of the key technologies in wireless sensor network. Aiming at the defect of fixed multi-anchor nodes method in low localisation precision, and in order to improve the localisation precision of wireless sensor, in this paper we propose an im- proved single anchor node-based WSN node localisation method （SFOA-SVM）. First, it uses single mobile anchor node to moved in the WSN, and constructs study samples of wireless sensor localisation model; then it uses SVM to build node localisation model, and employs fisher fishing algorithm to simulate fisher＇ s behaviour of fishing to find optimal SVM parameters ; finally the localisation performance of the node is tested by simulation experiment. Results show that relative to other localisati0n method, the SFOA-SVM method improves the localisa- tion precision of wireless sensor nodes and has certain practical applied value.