Path protection in WDM networks with quality of transmission limitations

Panagiotis Kokkinos, Konstantinos Manousakis, Emmanouel Varvarigos

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

6 Citations (Scopus)


We consider path protection in the routing and wavelength assignment (RWA) problem for impairment constrained WDM optical networks. The proposed multicost RWA algorithms select the primary and the backup lightpaths by accounting for physical layer impairments. The backup lightpath may either be activated (1+1 protection) or it may be reserved and not activated, with activation taking place when/if needed (1:1 protection). In case of 1:1 protection the period of time where the quality of its transmission (QoT) is valid, despite the possible establishment of future connections, should be preserved, so as to be used in case the primary lightpath fails. We show that, by using the multicost approach for solving the RWA with protection problem, great benefits can be achieved both in terms of the connection blocking rate and in terms of the validity period of the backup lightpath. Moreover the multicost approach, by providing a set of candidate lightpaths for each source destination pair, instead of a single one, offers ease and flexibility in selecting the primary and the backup lightpaths.

Original languageEnglish
Title of host publication2010 IEEE International Conference on Communications, ICC 2010
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISBN (Print)9781424464043
Publication statusPublished - 2010
EventIEEE International Conference on Communications 2010: Communications: Accelerating Growth and Development - Cape Town, South Africa
Duration: 23 May 201027 May 2010 (IEEE Conference Proceedings)


ConferenceIEEE International Conference on Communications 2010
Abbreviated titleICC 2010
Country/TerritorySouth Africa
CityCape Town
OtherThe IEEE Communications Society will hold its 2010 flagship conference,
International Communications Conference (ICC2010) in Cape Town, South Africa. This will be the first time that ICC has been held in Africa and with Cape Town being voted one of the most beautiful cities in the World, this promises to to be an exceptional conference. Conference participants will have a wide range of exciting options to add to their conference tour: hikes up the famous Table Mountain; whale watching; tours of the Cape Winelands, Robben Island and even CapePoint where two oceans meet. The FIFA World Cup Soccer tournament, held all around South Africa starts just after the conference ends.
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