摘要
针对现有无线传感器网络(WSN)锚节点移动策略不能有效避免遍历网络空洞区域时引起的移动路径过长、定位精度低等缺点,提出一种基于改进虚拟力模型的无线传感器网络锚节点移动策略。将未知节点的邻居节点数量及其到邻居节点的距离作为自身的密集权重属性,利用未知节点的密集度作为权值来改进传统的虚拟力模型。同时考虑测距误差ε的大小,利用三边测量法分析锚节点的最优分布情况、方向选择、移动步长、回退策略。使用未知节点收到的虚拟信标数量与其到锚节点的距离计算未知节点到锚节点的虚拟力,根据所受虚拟力的大小进行方向选择并进行移动。仿真实验表明,该策略可使锚节点根据未知节点分布的具体情况进行移动,有较高的定位精度,适应性强,成功缩短了锚节点的移动路径,降低了虚拟信标的数量,同时还能够有效避免锚节点进入网络空洞区域,减少了共线虚拟信标节点的数量。
The existing mobility strategy of the anchor node in wireless sensor network （WSN） has the shortcomings of too long moving path and low positioning accuracy when the anchor node traverses the network voids area. A new mobility strategy of WSN anchor node was proposed based on an improved virtual forces model. The number of neighbor nodes and the distance between the neighbor nodes to the anchor nodes were introduced as their own dense weight attributes. The unknown nodes in-tensity was used as weights to improve the traditional virtual force model. Meantime the distance-measuring error ε was taken into account. The optimal distribution, direction selection, shift step length and fallback strategy of anchor node could be ana-lyzed by the trilateration. Using the number of virtual beacon received by the unknown node and the distance between the un-known node to the anchor node calculate the virtual force. Then according to the virtual force, the direction was chosen and the anchor nodes were moved. Simulation experiments show that the strategy can make the anchor nodes move according to the specific circumstances of unknown node distribution. It has a high positioning accuracy and strong adaptability. It can success-fully shorten the path of the anchor node movement and reduce the number of virtual beacon. Moreover it can effectively avoid the anchor node to enter the network voids area and reduce the number of collinear virtual anchor nodes.
作者
魏连锁
蔡绍滨
潘实
WEI Lian-suo CAI Shao-bin PAN Shi(Department of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China College of Computer ＆ Control Engineering, Qiqihar University, Qiqihar 161006, China Department of Computer Science and Technology, Huaqiao University, Xiamen 361021, China)
出处
《通信学报》
EI
CSCD
北大核心
2017年第6期97-107,共11页
Journal on Communications
基金
国家自然科学基金资助项目(No.61571150)
教育部新世纪人才支持计划基金资助项目(No.NCET-13-0753)
教育部博士点基金资助项目(No.20132304110031)
黑龙江省自然科学基金资助项目(No.42400621-1-14076)
哈尔滨市科技创新人才研究专项基金资助项目(No.2014RFQXJ012)
华侨大学科研基金资助项目(No.16BS303)~~
关键词
无线传感器网络
虚拟力
移动锚节点
移动策略
wireless sensor network, virtual force, mobile anchor node, mobile strategy
