基于时空联合性的无线传感网覆盖采样技术

摘要

Coverage sampling technology has been studied extensively, which is a prime problem of wireless sensor networks. However, most researches only consider spatial coverage and network lifetime factors, therefore, few of them investigates spatial-temporal coverage concept from a practical view. In this paper,a new coverage ratio index is induced with comprehensive consideration in the spatial domain and temporal domain. Moreover,a novel coverage sampling technology based on spatial-temporal joint union for wireless sensor networks is proposed. Finally, the proposed algorithm is verified with two metrics including spatial-temporal coverage ratio and event detection ratio through simulations.%覆盖采样作为无线传感器网络领域的一个基本问题,已经得到了广泛研究.但是目前研究大多只考虑空间覆盖性和网络生存周期等因素,并没有从实用的角度考虑覆盖区域的时空域覆盖特性.以综合考虑空间域和时间域为研究视角,提出了一种新型的以应用为导向的覆盖率指数,研究了一种基于时空联合性的无线传感网覆盖采样机制.最后通过时空覆盖率与事件侦测率两个指标进行了验证.