Monitoring neighboring vehicles for safety via V2V communication

A driver should constantly keep an eye on vehicles closest to her/his location in order to avoid collisions. Unfortunately, the driver often does not see closest vehicles due to obstacles (other vehicles, trees, buildings, etc). In this paper, we introduce a novel type of query called a continuous range k-nearest neighbor (CRNN) query in vehicular ad-hoc networks, and propose a scheme for query processing. Our scheme aims at optimizing the usage of the wireless network bandwidth, computational cost, and local storage while preserving information on the continuous movement of vehicles within the broadcast range of a vehicle. Both simulation and road test results confirm the effectiveness and superiority of our scheme over an existing method.