Beacon-Based Cooperative Forwarding Scheme for Safety-Related Inter-Vehicle Communications

Abstract

AbstractMost safety-related applications targeting Inter-Vehicle Communications systems (IVC) rely on multi-hop broadcasts to disseminate safety-related information to all surrounding vehicles. However, these conventional broadcast schemes suffer from the so-called ”broadcast storm” problem, a scenario in which contention and collisions happens a lot due to an excessive number of broadcast packets. In this paper, we propose a novel solution, referred to as the Beacon-based Cooperative Forwarding (BCF) scheme for fast and reliable propagation of safety message within a critical area. With the aid of periodic beacons, the proposed scheme specifies multiple appropriate forwarder candidates to broadcast the alert message before detecting a danger. Moreover, a cooperative forwarding scheme is also proposed to guarantee high reachability and to delay constraints. After realistic simulations, the BCF scheme demonstrated better performance than other contention-based schemes by reducing the end-to-end delay and message rebroadcasting ratio by over 30% while maintaining a high message reception rate.KeywordsMedium Access ControlEnhance Distribute Channel AccessAccess CategoryNeighbor TableBeacon MessageThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.