(太原理工大学 计算机科学与技术系, 山西 太原 030000;太原大学 外语师范学院 现代信息技术系, 山西 太原 030012)
Study of Mixed Virtual Potential Field Coverage Algorithm in WMSN
WANG Xiao-Chen,FENG Xiu-Fang,FENG Xiao-Yuan
(Department of Computer Science and Technology, Taiyuan University of Technology, Taiyuan 030000, China;Department of Modern Information Technology, Foreign Language Normal College, Taiyuan University, Taiyuan 030012, China)
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Received:May 02, 2013    Revised:August 22, 2013
> 中文摘要: 主要研究无线多媒体传感器网络的模型优化和区域覆盖增强问题.首先从多媒体传感器节点具有方向性的感知特性出发,针对视频可接受清晰度问题,设计了一种改进的扇环感知模型,并以此为基础对无线多媒体传感器网络(WMSN)中区域覆盖增强问题进行研究.其次,采用混合虚拟势场对WMSN 的区域覆盖进行增强,质心在虚拟势场产生的引力和斥力作用下运动.算法针对传统虚拟势场可能出现因局部极小而导致覆盖优化效果降低的问题改进了斥力函数,引入邻居节点共同覆盖率辅助节点感知方向的调整.并在传感器节点迭代完成后引入边界斥力,以进一步优化边界节点的利用率.最后通过一系列的模拟仿真实验和效率对比表明了算法的有效性.
Abstract:This paper studies the optimization model and area coverage enhancement issues in wireless multimedia sensor networks (WMSNs). First, based on the directional perception characteristics of the multimedia sensor nodes, a modified sector-ring sensing model is provided to explore issues in video acceptable sharpness and regional coverage enhancement in WMSNs. Next, a mixed virtual potential field is proposed to enhance the area coverage in WMSNs through centroids movement under the effect of gravity and repulsion from the virtual potential field. To overcome the deficiency of local minimum and its reduced optimizing effect of coverage with traditional virtual potential field, the proposed algorithm improves the function of repulsion force by taking the common coverage rate of neighbor nodes into consideration to assist the adjustment of perception directions of the nodes. It also transmits border-dynamic repulsion force to sensor nodes after the iteration is completed to further optimize utilization of boundary nodes. Finally, a series of experiments and related simulations are performed to demonstrate the effectiveness of the algorithm.
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基金项目:山西省回国留学人员科研资助项目(2011-029); 山西省留学人员科技活动项目择优资助; 山西省科技基础条件平台建设项目(20110910003-0103) 山西省回国留学人员科研资助项目(2011-029); 山西省留学人员科技活动项目择优资助; 山西省科技基础条件平台建设项目(20110910003-0103)
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WANG Xiao-Chen,FENG Xiu-Fang,FENG Xiao-Yuan.Study of Mixed Virtual Potential Field Coverage Algorithm in WMSN.Journal of Software,2013,24(S1):1-6