ACK-based broadcast protocol for vehicular ad hoc networks

This paper proposes a new vehicular broadcast protocol that can operate in a dense as well as in sparse highway traffic scenarios. ACK-CAST is a distributed multihop broadcast protocol that relies on acknowledgment messages from one-hop neighbors to select next rebroadcasting vehicle in VANETs. The performance of the proposed scheme was compared with SERVUS. Simulation results demonstrate that the proposed scheme performs better in terms of efficiency, reliability and scalability.