Campus Units

Electrical and Computer Engineering

Document Type

Conference Proceeding


First International Conference on Broadband Networks

Publication Version

Accepted Manuscript

Link to Published Version

Publication Date


Journal or Book Title

First International Conference on Broadband Networks

First Page


Last Page




Conference Title

First International Conference on Broadband Networks

Conference Date

October 25-29, 2004


San Jose, CA


Failure resilience is one of the desired features of the Internet. Most of the traditional restoration architectures are based on single-failure assumption which is unrealistic. Multiple link failure models, in the form of shared-risk link groups (SRLG's) and shared risk node groups (SRNG's) are becoming critical in survivable optical network design. We classify both these form of failures under a common heading of shared-risk resource groups (SRRG) failures. In our research, we propose graph transformation techniques for tolerating multiple failures arising out of shared resource group (SRRG) failures. Diverse routing in such multi-failure scenario essentially necessitates finding out two paths between a source and a destination that are SRRG disjoint. The generalized diverse routing problem has been proved to be NP-complete. The proposed transformation techniques however provide a polynomial time solution for certain restrictive failure sets. We study how restorability can be achieved for dependent or shared risk link failures and multiple node failures and prove the validity of our approach for different network scenarios.


This is a manuscript of a proceeding published as Datta, Pallab, and Arun K. Somani. "Diverse routing for shared risk resource groups (SRRG) failures in WDM optical networks." In First International Conference on Broadband Networks, (2004): 120-129. DOI: 10.1109/BROADNETS.2004.34. Posted with permission.


© 2004 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Copyright Owner




File Format


Published Version


Article Location