AODV, DSDV, and DSR Protocols of Routing: A Comparative Study in VANETs Using Network Simulator-2

Mobile Ad-Hoc Networks (MANETs) are a group or a collection of wireless moving nodes (mobile-nodes) that spontaneously forms a network and functions with-out a central controller or coordinator. Mobile Ad Hoc Networks include the subset known as Vehicle Ad Hoc Networks (VANETs). The unpredictability of the multi-hop network design is further compounded by the fact that in MANET and VANET, nodes move around at their whim. Many well-known routing methods have been proposed to facilitate data flow between the different nodes of a wireless network. The NS-2 simulation in this research paper compares the performance of the protocols (reactive and proactive) of AODV, DSR, and DSDV across a variety of metrics, including "throughput, control overhead, packet delivery ratio, and average end-to-end latency". Simulations showed that different routing protocols may optimize the (VANET) connectivity and throughout. Moreover, the evaluations also illustrates the impact of sizes for the network and routing protocols on "packet loss, packet delivery ratio, average end-to-end delay and overhead transmission".