Abstract
Vehicular Ad-hoc Network (VANET) is an emerging and promising technology that places great demand on the access capability of the existing wireless technology. In VANET one primary issue is Medium Access Control (MAC), which aims to utilize the radio spectrum efficiently, to resolve potential contention and collision among vehicles for using the medium. Contention reduces the performance of single channel MAC layer and the workload distribution is also not well defined. So multi channel MAC protocols are useful to provide better quality of services (QoS) wherein, multi channel interference is a major problem to assign channel to a particular vehicle. Hence a survey is necessary on multi channel MAC protocols based on various parameters in vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) communication. This paper gives a brief overview of various issues involved in the design of multi channel MAC protocol in VANET.
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