无线多媒体传感器网络部署控制算法

A deployment-controlling algorithm for wireless multimedia sensor networks

已有的无线多媒体传感器网络(WMSNs)研究针对传感器放置在目标区域内的情况进行,且没有考虑节点通过云台的转动获得的整个可能感知区域对覆盖率的影响。本文首先针对节点放置点高于目标区域的应用进行研究,综合考虑节点感知区域和可能感知区域,建立了延时和无延时感知模型,并针对不同的感知模型提出了传感器网络部署控制算法(IVPDCA),算法中改进了虚拟势场算法,定义了节点质量的概念来表示节点间覆盖重叠的大小,建立受力模型,使得节点在合力作用下进行重新部署,同时关闭冗余节点,既延长了网络寿命,又提高了区域覆盖率。仿真结果验证了算法的有效性。

As for the existing research on coverage of Wireless Multimedia Sensor Networks（WMSNs）,applications of sensor being in target region are paid more attention to,and the effect of the whole possible sense area on coverage ratio is not taken into consideration.Aiming at different applications of sensor being higher than target region,a classification taxonomy is presented,in which these applications are fallen into two categories： delayed coverage and non-delayed coverage.Then a Deployment-Controlling Algorithm（IVPDCA） is put forward.Force model of improved virtual potential fields is established,and the sensor＇s mass is defined to exhibit the overlap between sensors.Redundant sensors are shut off and the coverage of networks can be enhanced by re-deploying sensors.Simulation results are presented for demonstrating the effectiveness of the proposed approach.