Dynamic Wider Bandwidth Channel Access in the Next Generation Vehicular Networks

Abstract

Intelligent Transport System (ITS) has drawn a lot attention using IEEE 802.11 p based technology. As the number of vehicles with IEEE 802.11p increases, communication congestion is expected due to the limitation of Carrier Sensing Multiple Access (CSMA) of IEEE 802.11. In order to alleviate the problem, dynamic wider bandwidth channel access of 20MHz with fairness is proposed in this paper. Instead of using 10MHz ITS channel, the proposed dynamic wider bandwidth channel access can decrease packet transmission time leading to channel capacity increase. However, users using the other 10MHz channel which is used for wider bandwidth channel access suffer from unfair channel usage.