spaper13_slides - streaming BinCuiandYazhen Liu Background...

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Enhancing aggregate QoS for video  streaming Bin Cui and Yazhen  Liu
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Background Multimedia applications create challenge for net work Streaming video, teleconferencing and distributed simulatio n systems. Multimedia applications require network QoS gu arantees Minimum path bandwidth End-to-end latency
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Background Traditional connection-oriented routing schemas  assume single-path routing, and attempt to find b est path base on one or two metrics For example, minimum end-to-end latency A path is useful for multimedia only if it satisfies  the QoS requirements A path with minimum end-to-end latency may doe s not meet the bandwidth requirement
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Background High performance multimedia applications may r equire: Controlled or guaranteed end-to-end quality Bounded delay Maximum loss rate High bandwidth consumption May consume high bandwidth steadily for long time
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Background Integrated Services (Int-Serv) Reserves resources within the network to provide a  particular QoS to individual traffic flow May not scale well to handle large volume of traffi c Differentiated Services (Diff-Serv) Provide different types or levels of service for Inter net traffic Aggregated traffic flows; IP packets are classified a
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Background Multiprotocol Label Switching (MPLS) Provide fast forwarding and flexible path control Small packet switching label in the forwarding table lo ok-up MPLS integrates IP and ATM Forwarding Equivalence Class (FEC) Each FEC is associated with a traffic characterization th at defines QoS requirement
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Background Support of Diff-Serv over MPLS Diff-Serv-aware Traffic Engineering (DS-TE) Mapping traffic from a given Diff-Serv class of service  on a separate LSP Allow traffic to utilize resources available to the give n class
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Motivation Traditional multimedia streaming usually assume  single-path data delivery Aggregate traffic between two nodes exceeds the p ath’s bandwidth Solution: disperse aggregate traffic over multiple  paths between ingress and egress Reduce the required bandwidth for each sub-strea m Improve reliability and security
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Related Works MPEG video dispersion MPEG video I-, P-, B- frames
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Related Works Dispersing Protocols Maxemchuk Introduced channel sharing in store-and-forward net
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This note was uploaded on 11/30/2011 for the course CIS 6930 taught by Professor Staff during the Fall '08 term at University of Florida.

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spaper13_slides - streaming BinCuiandYazhen Liu Background...

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