A Layered Broadband Switching Architecture with Physical or Virtual Path Configurations

Joseph Y. Hui, Melike B. Gursoy, Nader Moayeri, Roy D. Yates

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


We describe a multilayer connection control architecture for broadband communications. A graph framework is introduced to describe network layers of network design, path configurations, dynamic call routing, burst switching, and ATM cell switching. These hierarchical layers of switching are performed at decreasing time scales, respectively. Switching at the higher layer is performed to reduce blocking at the next smaller time scale. A layered notion of equivalent bandwidth for satisfying layered grade-of-service parameters is introduced for making connections at these time scales. We then focus on the path configuration layer. Two path setup methods, namely physical and virtual path setup, are described. Mathematical programs minimizing path bandwidth usage subject to meeting grade-of-service requirements are formulated for both methods. The relative merits of these methods are compared. In one example, physical path setup is shown to require roughly 50% more bandwidth than virtual path setup.

Original languageEnglish (US)
Pages (from-to)1416-1426
Number of pages11
JournalIEEE Journal on Selected Areas in Communications
Issue number9
StatePublished - Dec 1991

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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