Virtual Scanning Algorithm Based on Additional-area in Road Surveillance

The road surveillance based on wireless sensor network nowadays has received great attention and its application has been extensively used in practice. In this application, when the invasion target moves from road entrance to system protection points in road network, the nodes in wireless sensor network could detect the target timely and give an alarm before the target reaches the protection points.There are three main types of algorithms for nodes awake in road surveillance application presently, namely AAU(Always Awake-Up) algorithm, DC(Duty-Cycling) algorithm and Virtual Scanning Algorithm (VISA). VISA, which tailored and optimized for road network surveillance, has better performance than the others.This paper puts forward Virtual Scanning Algorithm based on Additional-area(VISAA), which introduces the more sleep time of the nodes based on the Additional Communication Area, to ensure the surveillance more reliability and effectively.The simulation results show that our algorithm has positive significance to improve the performance of road surveillance.

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