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ThinkMind // ICDS 2015, The Ninth International Conference on Digital Society // View article icds_2015_2_40_10126


Spectrum Allocation Policies in Fragmentation Aware and Balanced Load Routing for Elastic Optical Networks

Authors:
André C. S. Donza
Carlos R.L. Francês
João C. W. A. Costa

Keywords: Routing; spectrum allocation; elastic optical networks.

Abstract:
The rigid nature of wavelength division multiplexing (WDM) routed networks leads to inefficient capacity utilization. Thus, flexible networks are a possible breakthrough for Internet technology, as long as they provide higher spectrum efficiency use. Several discrete-time simulations were carried out in Matlab in order to analyze different spectrum allocation policies (First-Fit, Exact-Fit and Random-Fit) in some routing algorithms: The Fragmentation Aware Assignment (FA), the Shortest Path with Maximum Spectrum Reuse (SPSR) and the Balanced Load Score Spectrum Assignment (BLSA). Two network topologies were used: a small 6-node subset of Cost239 and a 7-node random topology. As physical layer effects were not included as constraints, Fragmentation Aware and Balanced Load Spectrum Assignment strongly outperformed Shortest Path with Maximum Spectrum reuse, with much better results for BLSA. The separation between First-Fit and Exact-Fit curves was smaller in SPSR than in FA and BLSA. In general, Exact-Fit spectrum allocation policy presented slightly better performance than First-Fit.

Pages: 46 to 51

Copyright: Copyright (c) IARIA, 2015

Publication date: February 22, 2015

Published in: conference

ISSN: 2308-3956

ISBN: 978-1-61208-381-0

Location: Lisbon, Portugal

Dates: from February 22, 2015 to February 27, 2015

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