The superposition of variable bit rate sources in an ATM multiplexer

Ilkka Norros, James W. Roberts, Alain Simonian, Jorma T. Virtamo

Research output: Contribution to journalArticleScientificpeer-review

99 Citations (Scopus)


When variable-bit-rate sources are multiplexed in an asynchronous transfer mode (ATM) network, there arise queues with a particular form of correlated arrival process. Such queues are analyzed by exploiting a result expressing the distribution of work in system of the G/G/1 queue originally derived by V.E. Benes (1963). A simple alternative demonstration of this result is analyzed and extended to the case of fluid input systems. The result is applied first to a queue where the arrival process is a superposition of periodic sources (the Sigma D/sub i//D/1 queue), and then to a variable-input-rate constant-output-rate fluid system. The latter is shown to model the so-called burst component of the considered superposition queuing process. The difference between this and the real queue, the cell component, can be evaluated by means of the results obtained for the Sigma D/sub i//D/1 queue. The relative importance of these two components is explored with reference to the particular case of a superposition of on/off sources.
Original languageEnglish
Pages (from-to)378-387
JournalIEEE Journal on Selected Areas in Communications
Issue number3
Publication statusPublished - Apr 1991
MoE publication typeA1 Journal article-refereed


  • bit rate
  • asynchronous transfer mode
  • multiplexing
  • queueing analysis
  • intelligent networks
  • helium
  • digital communication
  • communication switching
  • frequency
  • speech processing

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