Telepresentations & Reliable Multicast

5/13/98


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Table of Contents

Telepresentations & Reliable Multicast

Outline

Introducing Gordon Bell

Motivation: Telepresentations

Telepresentation Elements

Telepresentations: The Essentials

Telepresentations: The Killer App

Today’s Experiment

Scalable Telepresentations

Multiple Unicast

IP Multicast

Multicast Telepresentations

Reliable Multicast

Receiver-Reliable

SRM Approaches

Hierarchy / local recovery

Suppression

Polling

FEC

(n,k) encoding

ECSRM - Erasure Correcting SRM

Example: EC group size (k) = 7

…example

…example

…example: summary

More than one packet lost

ECSRM: more features

ECSRM: Cache Ambiguity

ARQ - obvious

Receiver-reliable Multicast

LRU/FIFO caching

Levels of persistence

Levels of persistence: layers

Layers of a presentation

Receiver scenario #1

Receiver scenario #2

Transmitting Telepresentations

Conclusion & Future Work

Author: Jim Gemmell

Email: jgemmell@microsoft.com

Home Page: http://research.microsoft.com/~jgemmell

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