A large scalable ATM multicast switch

Ka Lun Eddie Law, Alberto Leon-Garcia

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


This paper focuses on designing a large N × N high-performance broad-band ATM switch. Despite advances in architectural designs, practical switch dimensions continue to be severely limited by both the technological and physical constraints of packaging. Here, we focus on augmentation in a "single-switch" design: we provide ways to construct arbitrarily large switches out of modest-size components and retain overall delay/throughput performance. We propose a growable switch architecture based on several key principles: 1) the knockout principle exploits the statistical behavior of cell arrivals, and thereby reduces the interconnect complexity; 2) output queueing yields the best possible delay/throughput performance; 3) distributed control in routing (multicast) cells through the interconnect fabric without internal path conflicts; and 4) simple basic building blocks facilitate scalability. Other attractive features of the proposed architecture include: 1) intrinsic broadcast and multicast capabilities; 2) built-in priority sorting functionality; and 3) the guarantee of first-in, first-out cell sequence. To achieve 10 -14 cell loss probability, only maximum size 32 × 16 basic building modules are required, and no crossover interconnects exist between modules in a three-dimensional configuration.

Original languageEnglish
Pages (from-to)844-854
Number of pages11
JournalIEEE Journal on Selected Areas in Communications
Issue number5
Publication statusPublished - Jun 1997
Externally publishedYes


  • ATM switch fabrics
  • Knockout switch
  • Nonblocking
  • Output queueing
  • PINIUM switch
  • Scalable
  • Self-routing


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