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iCAIR Consortium QBone Proposal

Launched in October 1998, the QBone is an Internet2 initiative to build a testbed for new IP quality of service (QoS) technologies. Advanced university applications like remote instrument control, scientific collaborations and virtual classrooms are placing increasingly higher demands on the research networks. The QBone testbed will initially implement the differentiated services (DiffServ) approach to QoS now taking shape within the IETF. DiffServ has great potential to overcome some of the complexities of earlier IP QoS architectures, but requires a great deal of implementation experience, engineering, and study before it will mature to offer production-quality QoS.

This project uses two driver applications - digital video and tele-immersion - both of which are latency intolerant. Typical digital video streams currently used by some members of this consortium are MPEG1 1.5 Mbps. Tele-immersion can incorporate such a stream, and add a measure of control information and data (sometimes a separate audio channel for sound effects), but a basic 1.5 Mbps estimate is sufficient for now. It is expected that some experiments will be conducted using more than 1.5 Mbps, 3 Mbps and greater. This project will be linked to a parallel middleware project.


Phil Chimento
Centre for Telematics and Information Technology (CTIT) University of Twente
The Netherlands

Joseph Mambretti
MREN, Northwestern University

Cees de Laat
Department of Physics, Utrecht University


iCAIR / Northwestern University, MREN Consortium Indiana University / TransPAC

Centre for Telematics and Information Technology University of Twente
The Netherlands

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