An Efficient Emergency Messages Dissemination for Hybrid Sensor and Vehicular Networks

Hybrid Sensor and Vehicular Network (HSVN) is a combination of Vehicular Ad hoc Network (VANET) and Wireless Sensor Network (WSN). The main objective of HSVN is to provide real-time detection of road conditions and to solve the disconnection problem in VANET. In HSVN, the major challenge is to find an efficient scheme ensuring fast and reliable emergency messages dissemination. In this paper, firstly, we have proposed a new one-hop weight-based clustering algorithm for vehicle-to-vehicle communication, where only beacon messages are used for information exchange, to reduce the broadcast storm problem and to increase the stability of clusters. Secondly, we have presented a fast and reliable emergency messages dissemination protocol for HSVN to reduce the dissemination delay and to improve the reachability of emergency messages. Simulation results show that the cluster head lifetime and the awareness degree of vehicles are improved up to 87% and 40% respectively, and the dissemination delay is reduced up to 77%.