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Title:	Introduction to IP over WDM
Author:	Spadaro, Salvatore; Careglio, Davide; Aracil Rico, Javier; Fernández Palacios, Juan Pedro; Jajszczyk, Andrzej; Larrabeiti, David; López, Víctor; Masip Bruin, Xavier; Sánchez López, Sergio
Other authors:	Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CBA - Sistemes de Comunicacions i Arquitectures de Banda Ampla; Universitat Politècnica de Catalunya. ANA - Grup d'Arquitectures Avançades de Xarxes; Universitat Politècnica de Catalunya. GCO - Grup de Comunicacions Òptiques
Abstract:	The simple idea of having IP traffic directly transported over optical Wavelength Division Multiplexing (WDM) technology (“Internet Protocol (IP) over WDM”) has been envisioned as the future for the telecommunication infrastructure. The key point in this infrastructure becomes the switching layer between ubiquitous IP-centric networks and WDM physical layer. An intense debate has been ongoing about which model to adopt, aiming at identifying the degree of optical transparency and the proper flexibility of optical interconnection. Expected migration of switching functions from electronic to optics will be gradual, and will take place in several phases. The first phase is presented in this chapter. It is characterised by the use of the wavelength as a switching granularity; the terms optical circuit switching (Optical Circuit Switching (OCS)), wavelength switching and wavelength routed network are commonly and indifferently used.
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica -Wavelength division multiplexing -Multiplexatge per divisió de freqüència
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Document type:	Article - Published version Book Part
Published by:	Springer
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