Wavelength Conversion in WDM Networks

Authored by: Partha Pratim Sahu

Advances in Optical Networks and Components

Print publication date:  July  2020
Online publication date:  July  2020

Print ISBN: 9780367265656
eBook ISBN: 9780429293962
Adobe ISBN:

10.1201/9780429293962-5

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Abstract

Wavelength conversion (WC) can be included in WDM networks to increase link utilization/efficiency [1,2]. Wavelength converters [3–6] were already mentioned in Chapter 2 of volume 1. This chapter deals with the network performance issues when WC is incorporated. Various analytical models used to assess the performance benefits in a wavelength-convertible network will be reviewed. To establish a lightpath, a wavelength is allocated on all of the links in the path considering the wavelength-continuity constraint [1]. This constraint differentiates the wavelength-routed network from a “circuit-switched” network which has no such constraints since the latter blocks a connection only when there is no capacity along any of the links in the path assigned to the connection.

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