Scheduled System Maintenance:
On Monday, April 27th, IEEE Xplore will undergo scheduled maintenance from 1:00 PM - 3:00 PM ET (17:00 - 19:00 UTC). No interruption in service is anticipated.
By Topic

Physical topology design for survivable routing of logical rings in WDM-based networks

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
$31 $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)
Narula-Tam, Aradhana ; MIT Lincoln Lab., Lexington, MA, USA ; Modiano, E. ; Brzezinski, A.

In a WDM-based network, a single physical link failure may correspond to multiple logical link failures. As a result, 2-connected logical topologies, such as rings routed on a WDM physical topology, may become disconnected after a single physical link failure. We consider the design of physical topologies that ensure logical rings can be embedded in a survivable manner. First, we develop necessary conditions on the physical topology to be able to embed all logical rings in a survivable manner. We then use these conditions to provide lower bounds on the number of physical links that an TV-node physical topology must have in order to support all logical rings for even sizes K. For example, we show that when K ≥ 4 the physical topology must have at least 4N/3 links, and that when K ≥ 6 the physical topology must have at least 3N/2 links, and when K ≥ 8 the physical topology must have at least 1.6N links. Furthermore, we show that for K ≥ N - 2 the physical topology must have at least 2N - 4 links. Finally, we design a physical topology that meets the above bound for K = N - 2. We then modify this physical topology to embed rings of size K = N - 1 and K = N.

Published in:

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE  (Volume:5 )

Date of Conference:

1-5 Dec. 2003