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Application layer QoS

Don TowsleyUniv. Massachusetts

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Premise

Networking Technology lots of BW in core bottlenecks at peering points, access points little support for QoSApplications bulk data continuous media interactive (games, teleconferencing) … and others widely variable QoS requirements

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Overlay networks

CDNs for bulk data caching understood logical topology? routing?

CDNs for streaming applications caching strategies? (prefix caching) handling heterogeneity? (transcoding) handling variable quality network access?

(resilient packet level FEC, playout delay adjustment)

4

Next generation

distributed simulation nets distributed game nets teleconferencing nets intelligent information retrieval nets

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Overlay networks

intelligent game network teleconferencing

network

information retrieval network

video distribution

network

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Challenges

filtering (for QoS) fast setup and teardown

specialized vs. general purpose overlay net hierarchies management