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(to be completed)

 


ThinkMind // ICN 2011, The Tenth International Conference on Networks // View article icn_2011_6_30_10229


Optical Protection with Pre-configured Backup Paths and Limited Backup Resource Sharing

Authors:
Krishanthmohan Ratnam
Mohan Gurusamy
Kee Chaing Chua

Keywords: optical networks; wavelength-division-multiplexing; survivability;

Abstract:
In this paper, we consider provisioning protection in WDM optical networks with pre-configured backup paths. In the traditional protection approach, backup resources are not shared among pre-configured backup paths, and thus resources are not utilized efficiently. We propose a protection approach with the use of a switch architecture, which allows limited sharing of backup resources among pre-configured backup paths (referred to as pre-configured backup protection with limited sharing (PBPLS)). The architecture uses switching components with a flexible feature of splitting optical power on need basis in addition to directing the power towards one output port only. Further, configuration can be done which connects two (or more) input ports to the same output port at the same time. These features allow sharing backup resources while provisioning pre-configured backup paths. This approach can be adopted in networks in small geographical area such as metro networks since the power splitting feature is used. While sharing backup resources in this approach, we consider power loss particularly due to potential repeated power splitting. Amplifiers can be used, at additional cost, to compensate the power loss. Instead, we adopt an approach of limiting the number of power splitting to small values to reduce the power loss. Constraining the number of power splitting limits the degree of backup sharing. Through simulation experiments in a single class and multi-class traffic scenarios, we demonstrate that, even with the small number of power splitting such as one or two, significant improvement in blocking performance can be achieved.

Pages: 121 to 126

Copyright: Copyright (c) IARIA, 2011

Publication date: January 23, 2011

Published in: conference

ISSN: 2308-4413

ISBN: 978-1-61208-113-7

Location: St. Maarten, The Netherlands Antilles

Dates: from January 23, 2011 to January 28, 2011

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