Traffic Control and Multimedia Coding for High Speed Internet Access over Wireless Networks

This investigation spans two funded multi-year projects on traffic control techniques to enable quality of service support over the General Packet Radio Service (GPRS) and over broadband satellites for Internet access. We are developing novel service scheduling, traffic shaping and connection admission control methods to provide quality of service support for different service classes in GPRS. This work will be extended to include new service classes for real-time applications in future IMT2000/UMTS. The techniques will also be applied to the IETF Integrated Service (RFC2215) and Differentiated Service (RFC2475), using protocols such as RSVP (RFC2205) and RTP (RFC1889). Other subjects of investigation includes enhancement of TCP over satellite, and development of efficient IP multicasting techniques for wireless networks. Our techniques will be evaluated using realistic multimedia traffic generated using such ITU standards as H.323 and H.263. Results will facilitate the ongoing research on multimedia encoding/decoding and signal processing techniques. Work is in progress to enhance the robustness, error resilience and scalability of these techniques for multimedia communications over the Internet.