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Presenter: Ms. Lin Cai - Ph.D. Candidate, Dept. of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario
Supervisor:

Date: Wed, April 20, 2005
Time: 14:30:00 - 15:30:00
Place: EOW 430

ABSTRACT

Abstract

With the ever-increasing demand of Internet access anywhere, anytime, the Internet and wireless cellular systems will converge into a ubiquitous information transport infrastructure. Future proliferation of wireless Internet depends on its ability to support heterogeneous multimedia applications. Unlike traditional data applications, multimedia applications have more diverse and stringent Quality of Service (QoS) requirements. How to efficiently support multimedia applications with QoS provisioning over wireless Internet is a very challenging task. Since the dominant transport layer protocol, TCP, cannot meet the challenge, in this talk I will introduce our recent progress in transport layer protocol design for multimedia applications and a novel analytical framework for quantifying the QoS performance in hybrid wireless/wired networks. Based on the analytical results, the protocol parameters can be fine-tuned with the consideration of the QoS requirements and the wireless link profile. Extensive simulations have been conducted to validate the analysis and demonstrate the feasibility of our approach. It is shown that the re-engineered transport layer protocol can appropriately regulate multimedia traffic to efficiently utilize the wireless links and fairly share the Internet resources with coexisting TCP flows in a distributed manner. More importantly, the protocol can provide satisfactory QoS to heterogeneous multimedia applications.