An Adaptive Routing Protocol Based on QoS and Vehicular Density in Urban VANETs

Abstract

Multihop data delivery between vehicles is an important technique to support the implementation of vehicular ad hoc networks (VANETs). However, many inherent characteristics of VANETs (e.g., dynamic network topology) bring great challenges to the data delivery. In particular, dynamic topology and intermittent connectivity make it difficult to design an efficient and stable geographic routing protocol for different applications of VANETs. To solve this problem, the paper proposes an adaptive routing protocol based on QoS and vehicular density (ARP-QD) in urban VANETs environments. The basic idea is to find the best path for end-to-end data delivery, which can satisfy diverse QoS requirements by considering hop count and link duration simultaneously. To reduce the network overhead furthermore, ARP-QD adopts an adaptive neighbor discovery algorithm to obtain neighbors' information based on local vehicular density. In addition, a recovery strategy with carry-and-forward is utilized when the routing path is disrupted. Numerical simulations show that the proposed ARP-QD has higher delivery ratio than two prominent routing protocols in VANETs, without giving large compromise on delivery delay. The adaptivity of ARP-QD is also analyzed.

Reducing the Amount of Data for Creating Routes in a Dynamic DTN via Wi-Fi on the Basis of Static Data

“…In contrast to the authors of paper [9] we, in our research, put the reliability of delivery in the first place. Another difference between our routing method and the method proposed in [9] is its basing on static information about the movement of vehicles. And also data is transferred via Wi-Fi.…”

“…In particular, dynamic topology and intermittent connectivity make it difficult to design an efficient and stable geographic routing protocol for different applications of VANETs. To solve this problem, paper [9] proposes an adaptive routing protocol based on QoS and vehicular density (ARP-QD) in urban VANETs environments. Generally, path efficiency and path stability are two important criteria in designing routing protocol for VANETs.…”

“…Generally, path efficiency and path stability are two important criteria in designing routing protocol for VANETs. To achieve high efficiency, authors of article [9] selected the shortest path with minimum hop count as the best path. In contrast to the authors of paper [9] we, in our research, put the reliability of delivery in the first place.…”

“…To achieve high efficiency, authors of article [9] selected the shortest path with minimum hop count as the best path. In contrast to the authors of paper [9] we, in our research, put the reliability of delivery in the first place. Another difference between our routing method and the method proposed in [9] is its basing on static information about the movement of vehicles.…”

Road-Aware Routing Strategies for Vehicular Ad Hoc Networks: Characteristics and Comparisons

“…An adoptive routing protocol based on QoS and traffic density (ARP-QD) was proposed in [42] to find the best path by determining the hop count and link duration in a network. The protocol also uses an adaptive neighbor discovery protocol to determine the local traffic density.…”