A hybrid media access control protocol design for vehicular networks with a novel channel allocation mechanism

Recently, especially with emergence of an autonomous vehicle idea, Vehicular Ad-hoc Networks (VANETs), which are mobile networks, are subject to intense interest of vehicle manufacturers and researchers. Some of the important problems of TTAs formed by very fast moving vehicles are network breaks due to rapid displacement, access collisions, interference problems that arise between communication channels and connection problems in transition to other networks. In order to solve the problems mentioned above, the designing of robust Media Access Control (MAC) protocols that provide effective media access and organize the network is an important issue. In this thesis study, a robust VANET MAC protocol design which provides multichannel and reservation-based hybrid media access to overcome mentioned difficulties was realized. A MAC protocol that reduces access collisions and interferences and enables the vehicles to join the network rapidly thanks to the unique reservation algorithm and maintained its connection to the end of the track has been designed and simulated. In addition, the protocol allocates the channels of the DSRC standard, which is for VANETs. Also it provides multi-channel and hybrid communication by using FDMA, TDMA and CSMA access methods together. It has been observed that ReMAC and SOMMAC protocols developed in this study provide a significant performance advantage in metrics selected according to VeMAC, CS-TDMA, CFR-MAC, TM-MAC, VAT-MAC protocols which are similar. In this sense, it can be said that this study contributed positively to the literature.