ANALYSIS OF POPULAR CONTENT DISTRIBUTION FOR VEHICULAR NETWORKS USING SYMBOL LEVEL NETWORK CODING

The fundamental challenges The fundamental challenges to achieve high speed content downloading come from the highly? dynamic topology of vehicular ad hoc network (VANET)and the lossy nature of the vehicular wireless communications. we introduce CodeOn, a novel push-based PCD scheme where contents are actively broadcasted to vehicles from road side access points and further distributed among vehicles using a cooperative VANET. In CodeOn, we employ a recent technique, symbol level network coding (SLNC) to combat the lossy wireless transmissions. Through exploiting symbol level diversity, SLNC is robust to transmission errors and encourages more aggressive concurrent transmissions. In order to fully enjoy the benefits of SLNC, we propose a suite of techniques to maximize the downloading rate, including a prioritized and localized relay selection mechanism where the selection criteria is based on the usefulness of vehicles’ possessed contents, and a lightweight medium access protocol that naturally exploits the abundant concurrent transmission opportunitiesto achieve high speed content downloading come from the highly dynamic topology of vehicular ad hoc network (VANET) and the lossy nature of the vehicular wireless commu we introduce CodeOn, a novel push-based PCD scheme where contents are actively broadcasted to vehicles from road side access points and further distributed among vehicles using a cooperative VANET. In CodeOn, we employ a recent technique, symbol level network coding (SLNC) to combat the lossy wireless transmissions.? To maximize the downloading rate, including a prioritized and localized relay selection mechanism where the selection criteria is based on the usefulness of vehicles’ possessed contents, and a lightweight medium access protocol that naturally exploits the abundant concurrent transmission opportunities