By Topic

When is wavelength conversion contributing to reducing the blocking rate?

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
B. Jaumard ; Dept. of Comput. Sci. & Oper. Res., Montreal Univ., Que. ; C. Meyer ; Xiao Yu

Although many studies have now appeared on solving the routing and wavelength assignment (RWA) problem with full or partial wavelength conversion, it is still unclear to which extend the addition of wavelength converters has a significant or even measurable impact on network bandwidth efficiency or on the blocking rate. Indeed, several authors have observed that the blocking rate is often unchanged even with the addition of converters depending on the traffic instances and the network topology. For this reason, some authors, e.g., Ramaswami and Sasaki (1998) or Erlebach and Stefanakos (2003) have investigated further the usefulness or the impact of adding converters. In this study, we pursue in this direction and investigate two issues: performing some preprocessing tests when solving the RWA problem with/without conversion by identifying, at the outset, some lightpaths that will be present in the optimal solution, and some of the patterns that the traffic instances must contain in order to observe an advantage of adding converters. Conclusions are that quite particular traffic patterns must be present in order for wavelength conversion to be useful, and in that case, it is sufficient to have conversion features at a very limited number of nodes

Published in:

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.  (Volume:4 )

Date of Conference:

Nov. 28 2005-Dec. 2 2005