Vehicular Communications Framework for Efficient Multihop Connectivity in AHVN

The advanced heterogeneous vehicular network (AHVN) is a new paradigm for future vehicular networks. AHVN is an integrated architecture between the VANET and the existing cellular wireless networks. This paper introduces a vehicular communications framework for efficient Multihop connectivity in AHVN. The vehicular communication in VANET is based on the failure probability of vehicular connectivity. However, the vehicular communications to cellular networks (V2I) depends on the access failure probability to radio channel in base station (or Node B). We proposed a Multihop vehicular connectivity model in VANET which depends on the optimal headway distance, false initiation connectivity and the received signal strength (RSS). Then we determine the failure probability of vehicular connectivity (P_f) in Multihop VANET. Subsequently, we employ P_f as a handover criterion in order to establish a communication link with V2I when the VANET connectivity fails. Therefore, we propose an efficient multiple access scheme based-code reservation for resource management in AHVN, and then we can determine the failure access probability by employing a Markov chain model. The analysis of the proposed framework in terms of throughput, delay and access failure probability is driven. The numerical results demonstrate the effectiveness of the proposed framework.