Impact of graph theoretic network parameters on the design of regular virtual topologies for optical packet switching

O. Komolafe, D.A. Harle, D. Cotter

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

3 Citations (Scopus)


The design of regular virtual topologies to facilitate optical packet switching in networks with arbitrary physical topologies is studied in this paper. Due to the intractable nature of the problem, two different artificial intelligence based heuristics are used to find favourable solutions expeditiously. The impact that the spread of the degree of physical topology nodes has on the quality of solutions obtained is investigated. Two important counter-intuitive findings emerge from this paper. Firstly, increasing the spread of the nodal degree in the physical topology leads to an improvement in the quality of initial non-optimised (or random) solutions. Secondly and conversely, increasing the spread of nodal degree has a detrimental impact on the final optimised solutions obtained. Both these surprising conclusions are explained by introducing novel estimates for the initial cost and the margin for improvement on this cost. The results produced in this paper are interesting and are applicable to the design of regular virtual topologies in generic physical topologies and additionally, suggest principles that are applicable to the wider area of telecommunication network design.
Original languageEnglish
Title of host publicationCommunications, 2002. ICC 2002. IEEE International Conference on
Pages2827 - 2831
ISBN (Print)0-7803-7400-2
Publication statusPublished - 2002
EventInternational Conference on Communications 2002 - New York, NY, , United States
Duration: 28 Apr 20022 May 2002


ConferenceInternational Conference on Communications 2002
Country/TerritoryUnited States
CityNew York, NY,


  • telecommunication network topology
  • circuit topology
  • costs
  • high speed optical techniques
  • network topology
  • optical design
  • optical fiber networks
  • optical packet switching
  • resistance heating
  • routing
  • artificial intelligence
  • packet switching
  • optical switches
  • optical fibre networks
  • multiprocessor interconnection networks
  • graph theory


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