Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Impact of routing and wavelength selection strategies on GMPLS-controlled distributed restoration

Not Accessible

Your library or personal account may give you access

Abstract

The restorability problem in wavelength-routed networks without wavelength converters is investigated. A distributed control plane based on the generalized multiprotocol label switching (GMPLS) suite is considered for disseminating link-state information and reserving network resources. Different routing and wavelength selection strategies are proposed and a detailed performance analysis is carried out during restoration. Simulation results evaluate the blocking probability due to both lack of available resources (i.e., forward blocking) and resource contentions (i.e., backward blocking). Performance comparison provides some insightful suggestions to be applied to GMPLS-controlled wavelength-routed networks without wavelength converters. First, it is recommended to perform routing and wavelength selection separately at the lightpath source and destination, respectively. Second, routing can be computed on link-state information advertised during provisioning, without the need of flooding link-state information during restoration. In fact, during restoration, the resource contention among concurrent signaling instances is the dominant cause of blocking (i.e., backward blocking overcomes forward blocking). For this reason, intelligent routing and wavelength selection strategies aiming at avoiding or limiting resource contentions can help to improve restorability. In particular, among those strategies, the proposed wavelength selection has a better ability to reduce resource contentions than the routing strategies.

© 2008 Optical Society of America

PDF Article
More Like This
GMPLS-based Multidomain Restoration: Analysis, Strategies, Policies and Experimental Assessment

L. Velasco, F. Agraz, R. Martínez, R. Casellas, S. Spadaro, R. Muñoz, and G. Junyent
J. Opt. Commun. Netw. 2(7) 427-441 (2010)

Distributed Sharing of Functionalities and Resources in Survivable GMPLS-Controlled WSONs

A. Manolova, I. Cerutti, R. Muñoz, S. Ruepp, A. Giorgetti, N. Andriolli, N. Sambo, P. Castoldi, R. Martínez, and R. Casellas
J. Opt. Commun. Netw. 4(3) 219-228 (2012)

Dynamic Restoration With GMPLS and SDN Control Plane in Elastic Optical Networks [Invited]

Alessio Giorgetti, Francesco Paolucci, Filippo Cugini, and Piero Castoldi
J. Opt. Commun. Netw. 7(2) A174-A182 (2015)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved