Quality Of Service Enhancement For Drive-Thru Internet

Drive-thru Internet (or Internet of Vehicles) is a promising technique that exploits the inter-connected roadside units (RSUs) to offer Internet access for mobile users. Although there have been many studies aiming to improve the performance of the drive-thru Internet system, most existing solutions cannot support multiple services (e.g., data, video, and voice) and guarantee their quality of service (QoS) requirements simultaneously.Based on the in-depth study of drive-thru Internet, QoS enhancement solutions are presented in this thesis for drive-thru Internet to enhance the access performance of different applications. The major works of this thesis can be shown as following:1. An opportunistic vehicle-to-vehicle relay protocol with adaptive modulation is proposed. This scheme is able to guarantee a high successful transmission probability to achieve a high network throughput.2. An adaptive collision avoidance with service differentiation (ACASD) scheme is presented to improve the overall network performance with dynamically adjusted medium access control (MAC) layer parameters and support multiple services by assigning an appropriate priority level for each specific packet.3. For comparing and evaluating different QoS schemes in a drive-thru network environment, an efficient simulator is designed and developed.The simulation results demonstrate that the QoS enhancement solution is able to satisfy the QoS requirements of multiple services simultaneously in drive-thru Internet.