Protection Mechanisms for Optical WDM Networks Based on Wavelength Converter Multiplexing and Backup Path Relocation Techniques

Protection Mechanisms for Optical WDM Networks Based on Wavelength Converter Multiplexing and... In this paper, we consider the problem of routing connections in survivable wavelength-routed optical wavelength-division multiplexing (WDM) networks with wavelength conversion capabilities. A circuit-switched network architecture, using path-level protection to provide 100% protection guarantee to single link failures, is assumed. The blocking performance in such a network depends on the routing and wavelength assignment algorithm used and the amount of wavelength conversion available. Optical wavelength conversion, however is an expensive technology and may also cause signal degradation. Hence, it is important to effectively utilize the wavelength converters present in the network. With path protection, each connection is given a primary and a link-disjoint backup path. In this paper, we present four primary and backup route computation mechanisms that attempt to improve overall network performance compared to existing solutions. First, we present a routing algorithm, termed conversion free primary routing (CFPR) that tries to compute primary paths that do not require wavelength conversion. Next, we present a converter multiplexing technique that is used to share wavelength converters among multiple backup paths. We then propose a backup path relocation scheme that migrates existing backup paths, whenever needed, to accommodate more primary paths and also to obtain primary routes with fewer hops. Finally, we introduce modified CFPR (m-CFPR) that improves on CFPR by trying to find routes that will minimize relocations, while still maintaining the blocking performance. The proposed techniques are analyzed in detail using a discrete-event simulation model. The results show that significant reduction in blocking probability is possible with the proposed routing mechanisms. The converter multiplexing technique is seen to significantly reduce the number of connections blocked due to wavelength converter unavailability, and the number of wavelength converters required at each node, thus reducing system cost. The number of converters required at each node to achieve a given blocking probability is also seen to be four times lower, compared to existing architectures based on static shortest path routing. The proposed m-CFPR technique achieves the same blocking performance as that of CFPR, while requiring only one fourth the total number of relocations required with CFPR. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

Protection Mechanisms for Optical WDM Networks Based on Wavelength Converter Multiplexing and Backup Path Relocation Techniques

Loading next page...
 
/lp/springer_journal/protection-mechanisms-for-optical-wdm-networks-based-on-wavelength-ytHWIC05tb
Publisher
Kluwer Academic Publishers
Copyright
Copyright © 2006 by Springer Science+Business Media, LLC
Subject
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-006-0015-4
Publisher site
See Article on Publisher Site

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial