Speed and Position Aware Dynamic Routing for Emergency Message Dissemination in VANETs

Abstract

Vehicular Ad hoc Networks (VANETs) can help reduce traffic-related accidents by broadcasting Emergency Messages (EMs) in advance between vehicles. Due to the high-speed mobility of VANETs and attenuation of the wireless signal, reliable and fast transmission of EMs is a challenging task. Such as the chosen next-hop vehicle may have driven away from the neighborhood of the sender before receiving the EM, and rerouting may increase the delay when the EMs encounter transmission failure. To this end, we propose a Speed and Position aware Dynamic Routing (SPDR) for EM dissemination in VANETs. First, we introduce a speed metric dynamic greedy routing to provide a dynamic hop-by-hop rebroadcast of the EM. SPDR dynamically shrinks the Routing Decision Area (RDA) range based on the velocity variance of candidate neighbors and prioritizes the farthest vehicle in the shrunk RDA as the optimal next-hop, enhancing the reliable transmission of EMs. Then, we present a collaborative forwarding strategy to enable candidate neighbors to collaborate in communication. In case of transmission failure, SPDR elects the candidate vehicle close to the destination as the forwarder to reduce rerouting. Simulations in a practical motorway scenario using NS-2 and VanetMobiSim show that SPDR outperforms the existing protocols in terms of message delivery ratio, network throughput, and average dissemination delay.INDEX TERMS Vehicular ad hoc networks (VANETs), dynamic routing, emergency message (EM), nexthop selection, velocity variance.

A Reliable Message Broadcast Protocol Using Active RFID Mechanism in Vehicular Ad hoc Networks

“…Han et al [6] proposed a Speed and Position aware Dynamic Routing (SPDR) for the distribution of messages in VANETs. To enable a dynamic hop to hop retransmission of the message, the authors develop a speed measured dynamic greedy routing.…”

“…The location of vehicles in a simulation environment may also be quickly and accurately determined by network simulators with extensive facilities. But an error in location and the transmission of incorrect data to another vehicle can lead to unsuitable forwarder vehicle selection and, as a result, decreases the quality of service in network [4][5][6].…”

An Optimal Navigation Model for Realistic Traffic Network Scenarios in VANET

“…These features led to the conclusion that the platooning algorithm is an effective technique to reduce passengers' waiting times. The authors of [9] presented an examination of several simulation tools available for VANET. The taxonomy of VANET simulators makes it easier for upcoming VANET analysts to select the best simulator for the goals of the VANET scheme.…”

Multicasting Model for Efficient Data Transmission in VANET

“…The simulation outcomes revealed the effectiveness of the established algorithm over other position-based technique concerning PDR and E2E delay under numerous scenarios. M. Sindhwani, et.al (2021) designed AODV (Ad-hoc Ondemand Distance Vector) and ACO method and emphasized on transmitting the data is transmitted [15]. The primary algorithm deployed preliminary coordinates of every node.…”