Adaptive Routing Control Mechanism with a Stable Communication Topology Based on Vehicle Geocasting

Adaptive Routing Control Mechanism with a Stable Communication Topology Based on Vehicle Geocasting

Vehicular Ad-Hoc Networks (VANETs) are an emerging Telematics environment. VANETs have been applied in many fields, such as congestion avoidance, vehicle tracking, and crash notification. This work propose a novel stable communication control mechanism for VANETs, called dynamic geocast, and the information sharing group is defined by the information in the shared region. The dynamic geocast region also offers seamless and stable inter-vehicle communication based on highway conditions and vehicle status, including vehicle speed, transmission distance, and maximum and minimum speed limits on a highway. The key idea of the adaptive defer time routing algorithm is modified to overcome the problem of frequent network fragmentation, to predict when vehicles are within transmission range, and to identify new relay vehicles before network fragmentation occurs. The proposed transmission management system achieves stable inter-vehicle communication for a dynamic information sharing group in various situations in a highway environment.