An Enhanced GPSR Protocol for Vehicular Ad hoc Networks Several routing protocols have been proposed for ad hoc vehicle networks. They affect directly but differently the quality of the transmitted data. In this paper, we introduce a multipath feature to decrease packet loss in greedy perimeter stateless routing protocol (GPSR). Since using only one path during transmission may cause packet loss due to congestion and saturation in this path. Our enhancement is based on sending the same packet over two different paths to maximize its reception probability. This scheme is evaluated in a highway environment using Omnet, Veins, and SUMO. The results show that the proposed solution overcomes GPSR in packet delivery ratio.

VANETs Routing Protocols Survey: Classifications, Optimization Methods and New Trends The specific characteristics of vehicular adhoc networks, such as highspeed nodes, frequent topology changes and predefined vehicle movement paths, make mobile adhoc networks routing protocols not convenient to disseminate data in the vehicular environment. In addition, the new vision towards Internet of Vehicles concept along with the advent of autonomous cars contribute to the proliferation of new innovative applications with different QoS requirements, rising new challenging issues. In this paper, we survey the different taxonomies for vehicular routing protocols, while exposing several optimization techniques used to enhance routing protocols. Moreover, in order to foster the deployment of robust Internet of Vehicles routing protocols at large scale, we give some directions for future research work.