Fast Restoration Based on Alternative Wavelength Paths in a Wide Area Optical IP Network

Authors: Matera, Francesco¹; Rea, Luca¹; Venezia, Matteo¹; Capanna, Lorenzo¹; Prete, Giuseppe Del²

Source: Fiber And Integrated Optics, Volume 26, Number 2, March 2007 , pp. 123-134(12)

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Abstract:

In this article we describe an experimental investigation of IP network restoration based on wavelength recovery. We propose a procedure for metro and wide area gigabit Ethernet networks that allows us to route the wavelength in case of link failure to another existing link by exploiting wavelength division multiplexing in the fiber. Such a procedure is obtained by means of an optical switch that is managed by a loss-of-light signal that is generated by a router in case of link failure. Such a method has been tested in an IP network consisting of three core routers with optical gigabit Ethernet interfaces connected by means of 50-km-long single-mode fibers between Rome and Pomezia. Compared with other conventional restoration techniques, such as OSPF and MPLS, our method -in very fast (20 ms) and is compatible with real-time TV services and low-cost chips.

Keywords: DiffServ; gigabit Ethernet; GMPLS; IP; MPLS; restoration; router

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01468030601131519

Affiliations: 1: Fondazione Ugo Bordoni, Roma, Italy 2: Istituto Superiore delle Comunicazioni e Tecnologie dell'Informazione, Roma, Italy

Publication date: 2007-03-01

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