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SUMMARY:GateKeeper: Making Streaming Overlays Bandwidth Aware - Ant Rowstr
 on\, Microsoft Research Cambridge
DTSTART:20071113T143000Z
DTEND:20071113T153000Z
UID:TALK7726@talks.cam.ac.uk
CONTACT:Minor Gordon
DESCRIPTION:Scalable media streaming using overlays is becoming popular\, 
 but to support high bit-rate streams and smooth\, uninterrupted playback i
 s challenging. The maximum supported stream rate is constrained by the agg
 regate outbound bandwidth of the overlay\; if this bandwidth is less than 
 required then a large number of users can experience poor playback. Managi
 ng the overlay bandwidth efficiently is a major challenge especially when 
 a significant number\nof overlay members are behind asymmetric links. In t
 his talk I will describe GateKeeper\, a system that dynamically monitors a
 nd profiles the overlay-wide bandwidth and usage. I will demonstrate how t
 his information can be used to allow an overlay to adapt to the available 
 bandwidth - including admission control\, dynamic streaming rate scaling a
 nd per-node contribution adaption. This is joint work with Frank Uyeda (UC
 SD)\, Simon Schubert\, Denisa Ghita and Dejan Kostic (EPFL).\n
LOCATION:Room FW26\, Computer Laboratory\, William Gates Building
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