A Survey on Software-Defined VANETs: Benefits, Challenges, and Future Directions

TL;DR

This survey reviews the integration of Software Defined Networking with Vehicular Ad hoc Networks (VANETs), highlighting benefits, security challenges, and future research directions for next-generation intelligent vehicular systems.

Contribution

It provides the first comprehensive analysis of SDN-based VANET architectures, security threats, countermeasures, and future research directions in the context of 5G and emerging technologies.

Findings

SDVN architectures enhance network flexibility and management.

Security threats compromise key services like confidentiality and integrity.

Countermeasures can mitigate major security vulnerabilities.

Abstract

The evolving of Fifth Generation (5G) networks isbecoming more readily available as a major driver of the growthof new applications and business models. Vehicular Ad hocNetworks (VANETs) and Software Defined Networking (SDN)represent the key enablers of 5G technology with the developmentof next generation intelligent vehicular networks and applica-tions. In recent years, researchers have focused on the integrationof SDN and VANET, and look at different topics related to thearchitecture, the benefits of software-defined VANET servicesand the new functionalities to adapt them. However, securityand robustness of the complete architecture is still questionableand have been largely negleted. Moreover, the deployment andintegration of novel entities and several architectural componentsdrive new security threats and vulnerabilities.In this paper, first we survey the state-of-the-art SDN basedVehicular ad-hoc Network (SDVN) architectures for their net-working infrastructure design, functionalities, benefits, and chal-lenges. Then we discuss these SDVN architectures against majorsecurity threats that violate the key security services such asavailability, confidentiality, authentication, and data integrity.We also propose different countermeasures to these threats.Finally, we discuss the lessons learned with the directions offuture research work towards provisioning stringent security andprivacy solutions in future SDVN architectures. To the best of ourknowledge, this is the first comprehensive work that presents sucha survey and analysis on SDVNs in the era of future generationnetworks (e.g., 5G, and Information centric networking) andapplications (e.g., intelligent transportation system, and IoT-enabled advertising in VANETs).