Reliable and Scalable Broadcast Scheme for Safety Applications in Vehicular Ad Hoc Network

In vehicular ad hoc networks (VANETs), safetyrelated applications require fast and reliable message broadcasting techniques for efficient performance. Reducing redundancy and increasing the reliability of message broadcasts are key challenges amid high mobility, rapidly changing topologies, and shorter communication ranges. The broadcasting protocol needs to be scalable for large variations in vehicle densities and road topologies. This paper presents a new broadcast protocol for safety applications in vehicular networks. The discussed scheme is adaptive to current network loads and channel conditions. Compared with other state-of-the-art protocols in its category, it offers better robustness, coverage, and scalability. It achieves these gains by selecting the next relay node adaptively and effectively suppressing redundant transmission of safety messages. Compared to existing work, the presented protocol offers performance improvements in terms of coverage and delay. It offers a 21% improvement in delay compared to the farthest distance-based protocol.