On the bandwidth efficiency of pre-crossconnected trails

Eric D. Manley, Haitham S. Hamza, Jitender S. Deogun

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

3 Scopus citations


Recently, the use of Pre-Crossconnected Trails (PXTs) has been proposed for fault tolerant WDM optical networks. Arranging protection bandwidth into PXTs eliminates the need for switch reconfiguration after a failure which leads to faster recovery times. The researchers who introduced PXTs gave experimental results showing that PXT protection performs not much worse and sometimes better than conventional algorithms in terms of bandwidth efficiency. Their experiments compared a greedy PXT algorithm with a simple non-greedy conventional algorithm, so there remained some question about the effect of the PXT constraint itself on bandwidth efficiency. In this paper, we explore this topic further. We use experimental results to compare simple and greedy heuristics both with and without the PXT constraint. Our results show that the PXT variations require significantly more bandwidth overhead than their conventional counterparts especially in larger networks.

Original languageEnglish (US)
Title of host publication2007 IEEE International Conference on Communications, ICC'07
Number of pages6
StatePublished - 2007
Event2007 IEEE International Conference on Communications, ICC'07 - Glasgow, Scotland, United Kingdom
Duration: Jun 24 2007Jun 28 2007

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486


Conference2007 IEEE International Conference on Communications, ICC'07
Country/TerritoryUnited Kingdom
CityGlasgow, Scotland

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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