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.
|Title of host publication||2010 IEEE International Conference on Communications, ICC 2010|
|Publication status||Published - 2010|
|Event||IEEE International Conference on Communications 2010: Communications: Accelerating Growth and Development - Cape Town, South Africa|
Duration: 23 May 2010 → 27 May 2010
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=5497983 (IEEE Conference Proceedings)
|Conference||IEEE International Conference on Communications 2010|
|Abbreviated title||ICC 2010|
|Period||23/05/10 → 27/05/10|
|Other||The 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.