Performance evaluation of an Enhanced Hybrid Wireless Mesh Protocol (E-HWMP) protocol for VANET

In this paper we evaluate Enhanced Hybrid Wireless Mesh Protocol (E-HWMP), an enhanced version of HWMP based on IEEE802.11p and IEEE802.11s standards, especially created for Vehicular Ad-hoc Networks (VANETs). An enhanced gateway selection algorithm for multi-hop relay in VANET- LTE integration network is proposed. In the proposed algorithm the gateway selection is implemented using the E-HWMP protocol. The proposed gateway selection algorithm aims to improve the handoff efficiency and increasing the data rate while minimizing the average delay and overhead. Therefore, a multi-hop routing over the VANET network is designed. NS2 simulator is used to evaluate the system performance of the proposed gateway selection algorithm (E-HWMP). The results show that, compared to conventional methods, the proposed algorithm significantly improves the system performance in terms of packets delivery ratio, overhead and average end-to-end delay.