QoS Enabled Audio Teleportation
C. Chafe
CCRMA Stanford University

S. Shalunov, B. Teitelbaum
Internet2

M. Gröger
Deutsche Telekom

R. Roberts
Stanford Networking

S. Wilson, D. Chisolm, R. Leistikow, G. Scavone
CCRMA

Description:
Real-time Internet transmission of CD-quality sound is being demonstrated between the SC2000 floor and Stanford University. Uncompressed live audio streams are possible by employing network enhancements that support minimal delay and low-jitter packet delivery over WAN. Applications include two-way communication (full-bandwidth voice and music) and "surround sound" multi-channel eavesdropping on Stanford spaces. And the Internet itself can be listened to as a vibrating acoustic medium, as if it were a guitar string, with a new technique for generating sound waves on the Internet from real-time echoes (SoundWIRE). This auditory "ping" is used as a tool for evaluation of network constancy.
Network quality of service (QoS) for this demonstration consists of marking application traffic for Expedited Forwarding (EF), shaping and policing it at the network edge, and sending it over the Stanford University, CalREN2, and Abilene backbone network, where EF-marked traffic is preferentially serviced. The QoS network design in this demo reflects the architecture of the Internet2 QBone Premium Service. Heavy congestion is created at one or more points near the edge and effective protection of application traffic is demonstrated. For comparison purposes, QoS configuration is dynamically enabled and disabled via the Globus GARA tools and application quality without QoS protection is demonstrated as well.