A cross layer design for efficient multimedia message dissemination with an adaptive relay nodes selection in VANETs

Due to rapid extensions of multimedia applications, achieving high data transfer ratio is still challenging issue in higher mobility vehicles. Despite the numerous layered protocols designed for successful message dissemination, selects and saves least hops rather stable paths to destination to reduce delay. We propose novel cross layered design-CLARR (Cross Layer Autonomous Route Recovery) routing protocol, attempts to establish stable and shortest paths against inherent behavior of the network like frequent link breaks, short transmission time and random topology changes. CLARR includes two mechanisms: first selecting appropriate relay vehicles provides least possible hops to destination using neighborhood knowledge improves delay performance. Second is calculating high link life time by adding new field format like send time to Route Request packet for stable links. Thus decreases percentage of route error significantly. Simulation results under different scenarios using network simulator-2.34 shows proposed protocol has good performance.