Fast packet switching algorithms for dynamic resource control over ATM networks

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Real-time continuous media traffic, such as digital video and audio, is expected to comprise a large percentage of the network load on future high speed packet switch networks such as ATM. A major feature which distinguishes high speed networks from traditional slower speed networks is the large amount of data the network must process very quickly. For efficient network usage, traffic control mechanisms are essential. Currently, most mechanisms for traffic control (such as flow control) have centered on the support of Available Bit Rate (ABR), i.e., non real-time, traffic. With regard to ATM, for ABR traffic, two major types of ... continued below

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36 p.

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Tsang, R.P.; Keattihananant, P.; Chang, T.; Heieh, J. & Du, D. December 1, 1996.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Livermore, CA (United States)
    Place of Publication: Livermore, California

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Real-time continuous media traffic, such as digital video and audio, is expected to comprise a large percentage of the network load on future high speed packet switch networks such as ATM. A major feature which distinguishes high speed networks from traditional slower speed networks is the large amount of data the network must process very quickly. For efficient network usage, traffic control mechanisms are essential. Currently, most mechanisms for traffic control (such as flow control) have centered on the support of Available Bit Rate (ABR), i.e., non real-time, traffic. With regard to ATM, for ABR traffic, two major types of schemes which have been proposed are rate- control and credit-control schemes. Neither of these schemes are directly applicable to Real-time Variable Bit Rate (VBR) traffic such as continuous media traffic. Traffic control for continuous media traffic is an inherently difficult problem due to the time- sensitive nature of the traffic and its unpredictable burstiness. In this study, we present a scheme which controls traffic by dynamically allocating/de- allocating resources among competing VCs based upon their real-time requirements. This scheme incorporates a form of rate- control, real-time burst-level scheduling and link-link flow control. We show analytically potential performance improvements of our rate- control scheme and present a scheme for buffer dimensioning. We also present simulation results of our schemes and discuss the tradeoffs inherent in maintaining high network utilization and statistically guaranteeing many users` Quality of Service.

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36 p.

Notes

OSTI as DE97050464

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  • IEEE global communications conference, London (United Kingdom), 18 Nov 1996

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  • Other: DE97050464
  • Report No.: SAND--96-8548C
  • Report No.: CONF-961125--2
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 422200
  • Archival Resource Key: ark:/67531/metadc676133

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Aug. 3, 2016, 9:12 p.m.

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Tsang, R.P.; Keattihananant, P.; Chang, T.; Heieh, J. & Du, D. Fast packet switching algorithms for dynamic resource control over ATM networks, article, December 1, 1996; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc676133/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.