Authors: Annapurna P. Patil; Lalitha Chinmayee M. Hurali
Addresses: Department of Computer Science and Engineering, Ramaiah Institute of Technology, Bangalore, India ' Department of Computer Science and Engineering, Ramaiah Institute of Technology, Bangalore, India
Abstract: With the rapid development of smart cities, intelligent transport systems (ITSs) have revolutionised the modern transportation system. Vehicular ad hoc networks (VANETs) have become the backbones of the ITS. These VANETs are characterised by high mobility and dynamically changing topology, leading to frequent link breaks. Thus, routing is an essential aspect of VANETs, contributing to the overall network performance. Some challenges regarding routing are diminished quality of service (QoS), heterogeneous networks, and security. These challenges are efficiently addressed by a networking paradigm called software define networking (SDN). In this paper, we present the current state of the art in SDN based routing along with its merits. Also, a novel taxonomy of such routing protocols based on the organisation of the SDN controller, QoS metric, security, heterogeneity, and type of communication is presented. We conclude the analysis with the benefits of SDN-based routing over the traditional network-based VANETs concerning QoS, security, and heterogeneity in the networks.
Keywords: SDVNs; vehicular ad hoc networks; VANETs; smart cities; routing; software define networking; SDN; security; heterogeneity; intelligent transportation systems.
International Journal of Networking and Virtual Organisations, 2021 Vol.24 No.2, pp.161 - 181
Received: 28 Nov 2019
Accepted: 16 Apr 2020
Published online: 21 Apr 2021 *