A Priority MAC Protocol to Support Real-time Multimedia TraÆc in Ad Hoc Networks

Carrier sense multiple access and its variants have been widely used in mobile ad hoc networks. However, such access cannot guarantee the quality of real-time traÆc. This paper presents a distributed medium access control protocol that provides priority based multimedia access to wireless ad hoc networks. First, a priority classi cation scheme is used to distinguish the higher-priority frames (real-time frames) and lower-priority frames (data frames). Stations with the same priority frames are then individually assigned a unique identity number by an initialization scheme. Finally, stations transmit their frames in turn according to their identity numbers. Simulation results indicate that our protocol has bounded real-time frame delay and high channel utilization.