ITS- 802.11p based vehicular communication

Nowadays, wireless communications have spread to many application areas by serving different interfaces. Intelligent Transportation System is one of them which will play vital role for the future of safety communication and traffic management. Especially in the urban regions the communication density increases highly which causes saturated network for the vehicles. In the saturated network the collision probability increases abruptly that leads to exponential decrement of the throughput which is the well known problem of IEEE 802.11 standard MAC. In this thesis, to overcome with this problem and to increase the throughput, we propose two enhancement models such as CEA and DEA algorithms in MAC-layer protocol which is based on IEEE802.11p standard. Basically we update the back-off mechanism on the fly according to the knowledge of the previous state of the channel and the number of the active nodes within communication range in order to reduce the packet collision, to increase the throughput and to control congestion in the saturated network.