On the Protection of Multicast Trees in All Optical Networks Using the NEPC Strategy - LIRMM - Laboratoire d’Informatique, de Robotique et de Microélectronique de Montpellier Access content directly
Reports Year : 2011

On the Protection of Multicast Trees in All Optical Networks Using the NEPC Strategy

Abstract

Due to the huge volume of the carried data in all optical networks, the ability of these networks to cope with failures becomes crucial. One of the proposed mechanism is the protection of the routes (lightpaths and light trees) with the help of precomputed ans reserved backup routes permitting to rapidly change the routes in the case of failures. The protection with p-cycles is an efficient method, which was originally proposed to protect on-cycle and straddling links. Recently the cyclic protection was extended to protect nodes in lightpaths and in light trees. As light trees can contain some branching nodes where the incoming light is spitted to several outgoing sub trees, the protection of these kind of trees is more delicate. In opaque networks where the switches may be virtual sources, efficient cycle-based protection schemes can be computed since each node can be the source of newly inserted light branches on an arbitrary precomputed cycle. Contrarily, with the apparition of optical switches and all optical solutions in core networks, the protection scheme should correspond to stringent optical constraints. Namely, the branching nodes of a protection scheme must correspond to available splitters. That is, the protection of multicast trees is limited in all optical domains. Our paper aims with the formulation of the potential protection possibilities and give the conditions to apply NEPC based protection.
Fichier principal
Vignette du fichier
mc_protection.pdf (194.12 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

lirmm-00611957 , version 1 (27-07-2011)

Identifiers

  • HAL Id : lirmm-00611957 , version 1

Cite

Miklós Molnár. On the Protection of Multicast Trees in All Optical Networks Using the NEPC Strategy. RR-11022, 2011. ⟨lirmm-00611957⟩
111 View
80 Download

Share

Gmail Facebook X LinkedIn More