A Prioritization-Based Application-Oriented Broadcast Protocol for Delay-Tolerant Networks

In this paper, we will study an broadcast protocol based on prioritization for delay-tolerant networks (DTNs). Considering the feature of the DTNs where there may be rare stable links, we propose an application-oriented broadcast (AOB) protocol built atop "bundle layer" in DTNs, which adjusts the forwarding probability for different types of traffic categories. As a result, AOB can provide differentiated services for prioritized data packets and simultaneously reduce the broadcast overhead. The performance of the proposed protocol is evaluated by extensive simulations for scenarios with not only random way point mobility model but also realistic mobility traces collected from cars moving in the city.