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ThinkMind // ICSNC 2012, The Seventh International Conference on Systems and Networks Communications // View article icsnc_2012_7_40_20253


Distance-Adaptive Routing and Spectrum Assignment of Deadline-Driven Requests in Reconfigurable Elastic Optical Networks

Authors:
Jared Morell
Gokhan Sahin

Keywords: deadline-driven traffic; elastic optical network; optical OFDM; routing modulation level and spectrum assignment; network reconfiguration

Abstract:
Spectrum-sliced elastic optical networks, enabled by technological advances such as CO-OFDM, bandwidth-variable transponders, bandwidth-variable optical cross-connects, and optical multi-level modulation, provide a means to divide the spectrum on a finer granularity than WDM and to slice-off just the adequate amount for each connection. It is envisioned that these networks will carry various types of traffic with different service level guarantees, including deadline-driven requests (DDRs) that require the data to be transferred by a given deadline without imposing a specific constant bandwidth requirement. As a result, DDRs can be provisioned with variable transmission rates between their arrival times and deadlines. We consider the DDR-provisioning problem in a reconfigurable elastic optical network that supports such bandwidth readjustments through minimal reconfiguration in the network, and develop a distance-adaptive routing, spectrum assignment, and reconfiguration algorithm for this purpose. Our results show major improvement in performance due to bandwidth reallocation of DDRs in elastic networks over a range of reconfiguration delay parameters.

Pages: 175 to 179

Copyright: Copyright (c) IARIA, 2012

Publication date: November 18, 2012

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-231-8

Location: Lisbon, Portugal

Dates: from November 18, 2012 to November 23, 2012

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