An Active Mobile Sensor Scheduling Protocol Based on Virtual Force

In the last period of wireless sensor network deployed by barrier coverage,the lifetime can be prolonged with the help of limited mobile wireless sensor.In this paper,we first analyze the distribution characteristics in the scene and propose an adaptive adjustment method of scoping replaceable mobile wireless sensor.Then,we establish a virtual force model of wireless sensor in different states.Last,we propose a mobile sensor active scheduling protocol based on virtual force. Simulations show that our methods provide effective enhancement in coverage probability and lifetime,compared with traditional static wireless sensor network.And,our methods bring minimal increase in network load.