阴影衰落环境下无线传感网络的概率覆盖研究  

The probabilistic coverage problem of wireless sensor networks in a shadow fading environment

作　　者：刘益[1] 王东[2] 胡楚然[1] 谢小婷[1] 

机构地区：[1]湖南人文科技学院计算机系,湖南娄底417000 [2]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《电子技术应用》2011年第8期98-101,104,共5页Application of Electronic Technique

摘　　要：信号传播过程中因障碍物阻挡产生的阴影衰落对无线传感器网络的覆盖产生较大的影响。针对阴影衰落环境下无线传感器网络的覆盖问题,分析了主要相关因素对网络覆盖性能产生的影响,提出了基于概率的协作感知模型,并推导出满足一定覆盖质量要求时相应的协作感知半径,进而得出所需的最少工作节点数目及其与阴影衰落强度、网络感知概率和覆盖精度之间的关系。实验结果表明了该模型的合理性以及理论分析的正确性。A shadow fading caused by obstructions in the surroundings of transmitting has an important effect on wireless sensor networks. By analysing the major factors, this paper presented a collaborative sensing model based on probability, and then derived the corresponding cooperative sensing radius and minimum working number which can satisfy the certain quality requirements of coverage. Besides, the relation that bewteen the minimum working number and the shadow fading strength, sensing probability, sensing accuracy is given. Experimental results show that the rationality of the model and the validity of theoretical analysis.

关 键 词：阴影衰落 无线传感器网络 概率覆盖 协作感知 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]