Energy-Efficient Barrier Coverage Based on Nodes Alliance for Intrusion Detection in Underwater Sensor Networks

The barrier coverage problem is generally considered for intrusion detection in underwater sensor networks (UWSNs). In conventional barrier coverage strategies in UWSNs, there is no cooperation between sensors. The information fusion is used to construct barrier coverage for higher detection probability by enhancing the sensor's interaction capability. However, more energy is consumed for information fusion, which will shorten network lifetime. In this paper a novel high-energy-efficient barrier coverage based on nodes alliance is proposed. Based on the UWSN's detection mode and energy consumption mode adopting nodes alliance, the relationship between the number of virtual sensors and the energy consumption is discovered. Based on this relationship, the problem of high energy efficiency is transformed into an optimization problem. By solving the optimization problem, the optimal number of physical sensors forming virtual sensors is achieved. Based on the optimal number, high detection probability and low energy consumption are taken into account simultaneously to construct barrier coverage. Both analytical and simulation studies demonstrate that the proposed strategy can provide high-energy-efficient barrier coverage.