A distributed MAC protocol based on reservation for ad hoc networks

Wireless ad hoc networks built up on such as the airborne, vehicular or shipborne, which have known geographic location when they had been equipped with GPS, have a requirement of real-time traffic for collision avoidance in emergency. That is, the closest two nodes desire an assurance of the priority. Therefore, a new protocol called a distributed reservation MAC protocol (DR-MAC) has been presented. Based on geographic location, DR-MAC implements the reservation of control channel based on SOTDMA, further solves reservation of data channel. The algorithm design and the collision analysis are also introduced in this paper. The simulation results show that it can decrease the average end-to-end delay and improve priority of the nearest nodes.