Abstract
As the number of vehicles is increasing, the number of road side accidents is also increasing rapidly. The majority of these accidents is caused by the negligence of the driver. For intelligent transportation services, new protocols and architecture are continuously being developed by researchers around the globe. Thus to ensure the safety of drivers many countries are now adopting and investing a lot on vehicular ad hoc network (VANET). On the other perspective, there are many issues related to this field that must be resolved before VANET technology is practically adopted. In the case of no or low-security, several attacks can occur that may affect the efficiency and the reliability of the system. To make VANET systems more efficient software defined networking (SDN) technology is introduced in it. This technique was shortly named as SDN-based VANET. SDN-based VANET system helps us to get rid of the restriction and the challenges that are present in the simple VANET systems. It helps us to decrease the overall load on the network by managing the overall network through a single remote controller. In this survey paper, we will elaborate the concept of SDN-based VANET, its working, applications, services, security threats, and benefits over the previous techniques.
Highlights
Because travel modes change over time, new techniques and mechanisms are introduced to increase their efficiency
The wireless network provides the convenience of a wire-free environment to its hosts, so they have the ability to move freely, which leads to dynamic topologies
This system differs from a wired infrastructure because in wireless networks, a specific node can act as an access point [2]
Summary
Because travel modes change over time, new techniques and mechanisms are introduced to increase their efficiency. DSRC provides a high data transmission rate and is used in safety applications Through this form of communication, vehicles can share secure information to prevent any mishap as well as in postaccident investigation [4]. The separation of the control and data planes makes this network simple and easy to manage even when the number of nodes in the network increases rapidly This new SDN system has been introduced in VANET to manage the communication throughout the network. Because of the increase in the demand for the VANET system, it has become difficult for the routing protocols to manage the communication, privacy, and security of the system This problem can be solved with the help of the SDN system.
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