Services and Security Threats in SDN Based VANETs: A Survey

Table 1

Services provided by SDN-based VANETs.

Service	Mechanism	Advantages
Intrusion detection	(i) Intrusion detection system run by SDN controller; (ii) Analyze the traffic behavior	Enhance detection capability as compared to the traditional network
Detection of malicious behavior	(i) Detection performed by RSU or vehicle node; (ii) Use probing technique	(i) Easily implemented; (ii) Reduce load on controller
Network forensics	Monitor flow of data and detect the modification in device settings	Identify the attacker
Self-healing	Rules are defined by the controller that provides detection, diagnoses, and recovery	Automatic recovery against any attack
Path selection	SDN controller performs rerouting in order to obtain balanced routing	Avoid congestion
Channel/frequency selection	SDN controller selects the appropriate channel for communication	Efficient resource utilization