Abstract
Previous studies have proposed various uses of wireless sensor networks, including military, surveillance, environmental monitoring, and health care applications. Sensor network coverage is a major concern because it reveals how well an area is monitored. However, the number of sensor nodes in a monitored area must be sufficient for achieving full spatial coverage. When the monitored area cannot be fully covered because of few sensor nodes, continually monitoring the specific area is a considerable challenge. Full temporal coverage, in which every point of a given monitored region is monitored within a specific time interval, can be achieved if mobile sensors are precisely scheduled. In this study, an energy balance mechanism is designed to maintain full temporal coverage in a monitored area. Furthermore, the monitoring lifetime is lengthened. The experimental results revealed that the proposed mechanism supports full temporal coverage and improves the quality and lifetime of monitoring.
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