Speaker: Prof. Thomas C Schmidt,
Affiliation: University of Hamburg, Germany.
Date/Time: 28th January 2009, 13:00-14:00.
Location: Room G74, Philip Lyle Building.
Map: http://www.info.rdg.ac.uk/maps/maps-display.asp
Abstract:
Video Conferencing, like IPTV and MMORPGs, is a rapidly emerging multimedia group application that extends to the next generation, truly mobile Internet. While unicast mobility has been standardized within the IETF, a standard design of mobile multicast is still awaited. The open problem poses significant operational and security challenges to the Internet infrastructure, since IP multicast routing, when adapting its distribution trees to moving listeners or senders, needs to newly establish forwarding states. The latter requires a homogeneous and coherent availability of multicast routing in all visited networks. Multicast communication services are one of the longest debated issues in the 30 years history of the Internet. Disagreement over countless approaches and solutions to the IP host group model has led to a strongly divergent state of deployment. Stimulated by the need of applications, alternative multicast mechanisms have been developed. P2P technologies have enabled group distribution on the application or service middleware layer, which can be transparently deployed with respect to the network layer. In this presentation we start from our mobile multipoint video conferencing solution, and continue to discuss problems, proposals and possible solutions for establishing a mobility-agnostic group communication layer. The Hybrid Shared Tree multicast approach is outlined to support a mobility-agnostic integration of interdomain multicast routing on the overlay. Cryptographic authentication of mobile multicast sources completes this work.
Bio:
Thomas C. Schmidt teaches Computer Networks & Internet Technologies at Hamburg University of Applied Sciences (HAW) and leads the Internet Technologies research group (INET) there. Prior to moving to Hamburg, he headed the computer centre of FHTW Berlin for many years, and continued work as an independent project manager later. He studied mathematics and physics at Freie Universität Berlin and University of Maryland. He has continuously conducted numerous national and international projects. His current interests lie in next generation Internet (IPv6), mobile multicast and multimedia networking, as well as XML-based hypermedia information processing. He serves as co-editor and technical expert in many occasions and is actively involved in the work of IETF.
Web:
Home - http://www.informatik.haw-hamburg.de/~schmidt/
Project - http://moviecast.realmv6.org/
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