Abstract-We have developed a novel link layer architecture that provides multiple Quality of Service points simultaneously over wireless Internet links. Our approach enhances the performance of diverse applications over error prone links. We discuss the performance problems of Internet protocols over wireless links, presenting as a case study our measurements on a wireless LAN, and argue that it is preferable to handle wireless impairments at the link layer. We present a simulation study of various link layer enhancements and their impact on TCP and UDP performance. Our results show that different approaches are preferable for each type of application. We thus propose a Multi Service Link Layer approach that supports multiple link layer mechanisms over a single link. Our scheme is transport protocol independent and customizable for the underlying wireless link technology. While our approach can be directly deployed on the existing Internet, it also provides support for future Quality of Serviceaware protocols and applications. Our simulation results show that our approach improves uniformly the performance of both TCP and UDP applications.
Different link layer schemes might be appropriate for different transport layer protocols (TCP and UDP) and application types REF .
Link Layer Support for Quality of Service on Wireless Internet Links
IN PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON TELECOMMUNICATIONS (ICT '98
Computer Science