Abstract
Vehicular ad hoc network is a network of moving vehicles in which a set of road side units (RSUs) are used over vehicular networks to assist and communicate with moving vehicles. Numbers of vehicles are increasing day by day, and the numbers of motor vehicle accidents are also increasing. Therefore, quality of service (QoS) has become very crucial and challenging aspect for safe and convenient driving. Congestion control is one of them that provide quality of service (QoS) in vehicular network. Lots of research has been done in congestion control, and lots of research is to be done to ensure safe and reliable communication. Over the last decades, several algorithms have been proposed to address congestion problem in vehicular ad hoc networks (VANETs). In this paper, various congestion control techniques have been reviewed. These algorithms are compared on different parameters.
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