Proxy prefix caching for multimedia streams

Subhabrata Sen, Jennifer L. Rexford, Don Towsley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

424 Scopus citations

Abstract

High latency and loss rates in the Internet make it difficult to stream audio and video without introducing a large playback delay. To address these problems, we propose a prefix caching technique whereby a proxy stores the initial frames of popular clips. Upon receiving a request for the stream, the proxy initiates transmission to the client and simultaneously requests the remaining frames from the server. In addition to hiding the delay, throughput, and loss effects of a weaker service model between the server and the proxy, this novel yet simple prefix caching technique aids the proxy in performing workahead smoothing into the client playback buffer. By transmitting large frames in advance of each burst, workahead smoothing substantially reduces the peak and variability of the network resource requirements along the path from the proxy to the client. We describe how to construct a smooth transmission schedule, based on the size of the prefix, smoothing, and playback buffers, without increasing client playback delay. Experiments with MPEG traces show how a few megabytes of buffer space at the proxy can substantially reduce the bandwidth requirements of variable-bit-rate video. Drawing on these results, we present guidelines for allocating buffer space for each stream, and how to effectively share buffer and bandwidth resources among multiple clients and streams.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE INFOCOM'99
Subtitle of host publicationThe Conference on Computer Communications - 18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now
Pages1310-1319
Number of pages10
DOIs
StatePublished - 1999
Event18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now, IEEE INFOCOM'99 - New York, NY, United States
Duration: Mar 21 1991Mar 25 1991

Publication series

NameProceedings - IEEE INFOCOM
Volume3
ISSN (Print)0743-166X

Other

Other18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now, IEEE INFOCOM'99
CountryUnited States
CityNew York, NY
Period3/21/913/25/91

All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Electrical and Electronic Engineering

Keywords

  • multimedia streaming
  • proxy caching
  • resource allocation
  • variable-bit-rate video
  • workahead smoothing

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  • Cite this

    Sen, S., Rexford, J. L., & Towsley, D. (1999). Proxy prefix caching for multimedia streams. In Proceedings - IEEE INFOCOM'99: The Conference on Computer Communications - 18th Annual Joint Conference of the IEEE Computer and Communications Societies: The Future is Now (pp. 1310-1319). [752149] (Proceedings - IEEE INFOCOM; Vol. 3). https://doi.org/10.1109/INFCOM.1999.752149