Transport layer protocol design for multimedia wireless Internet

							Transport Layer Protocol Design for Multimedia Wireless Internet by Lin Cai, PhD
Tuesday, March 29, 2005 S&T2, rm 320 2:30pm Abstract: With the ever-increasing demand of Internet access anywhere, anytime, the Internet and wireless cellular systems will converge to 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 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 confirm the efficacy of 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.