Determination of K-Coverage Configuration for Meeting Desired Quality of Surveillance on WSNs

Abstract

For monitoring critical applications by using wireless sensor networks (WSNs), users usually care about the false positive (false alarm) probability and false negative (detection miss) probability of a WSN, which are defined as quality of surveillance (QoSu) in this paper. To mask faulty sensors, the K-coverage configuration is widely exploited to ensure that each location is covered by at least K sensors. However, increasing K effectively reduces detection misses but incurs high false alarm rate. Little work evaluates the K-coverage configuration in terms of explicit metrics. In this paper, we propose a fault-tolerant model, which determines the value of K according to a desired QoSu while maximizing the system lifetime. Experimental results show that (1) the K-coverage configuration is insufficient to meet the QoSu without adopting any fusion scheme, and (2) the derived configuration minimizes power consumption while meeting the QoSu.