Wave-type barrier coverage for border security in Wireless Sensor Networks

Recently, border security systems attract attention as large-scale monitoring system applying Wireless Sensor Networks (WSNs). In this paper, we deal with a network construction method of sensor nodes for border security systems. Border security systems generally monitor intruders by using sensor nodes with communication function. Those systems require the detection of some intruders and the long-term operation. Moreover those systems have a serious problem of power consumption. In this paper, we propose an effective method to reduce substantially the power consumption of the system by dynamic sleep scheduling of sensor nodes. This method periodically shifts the sleeping area of sensor nodes such as waves in seashores. We call it Wave-Type Barrier Coverage (WTBC). By computer simulation, we show that WTBC can control substantially power consumption of the system with high reliability and simple architecture.