Event Details
Performance Enhancement in VANET with Admission Control and Contention Window Adjustment
Presenter: Vivek Tiwari
Supervisor: Dr. Lin Cai
Date: Fri, August 17, 2012
Time: 10:30:00 - 11:30:00
Place: EOW 430
ABSTRACT
ABSTRACT:
Vehicular Ad Hoc Networks (VANET), a derivative of mobile networks, has the capability to increase the safety, efficiency and comfort of transportation systems, and provide users on-the-road Internet connectivity. Because of its impetus and signifi cance in practical scenarios, it becomes a sought after topic in both industry and academia. In this thesis, we focus on the vehicle-to-infrastructure (V2I) drive-thru Internet services in a highway scenario. The road side unit (RSU) along a highway can provide network services for vehicles within the coverage. To enhance the network performance, we propose two strategies. First, to ensure a high network throughput, the RSU uses an admission control strategy to limit the competition among vehicles, and avoid the waste of channel time to the low-data-rate users. Second, based on the vehicle density, we also propose a contention window (CW) adjustment strategy which can reduce the collision probability when the network is congested, and reduce the idle time otherwise. Extensive simulations using network simulator (NS-2) are given, which demonstrate the e ectiveness of the proposed solutions.