An Information Relevance Related Broadcast scheme for Safety Packets in VANETs

The emerging wireless vehicular communication technologies are intended to improve the safety of transportation system. This paper proposes a multi-hop to deliver Safety Packets (SPs) in Vehicular Ad Hoc Network (VANET). The proposed broadcast scheme, namely the Information Relevance Related Broadcast (IRRB) approach, introduces three related parameters of SPs, i.e., the Affecting Time (AT), the Affecting Distance (AD) and the Affecting Lane Set (ALS), to confine the dissemination of each SP within a limited area. IRRB also deploys the Distance-and-Lane-based Relay Selection (DLRS) strategy and the Distance-based Delay Time (DDT) strategy to improve the broadcast efficiency. Simulation results show that the IRRB scheme is able to reduce redundant packets while ensuring the delivery reliability of SPs.