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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 4 — Apr. 1, 2013
  • pp: 305–315

Routing, Modulation Level, and Spectrum Assignment in Optical Metro Ring Networks Using Elastic Transceivers

Cristina Rottondi, Massimo Tornatore, Achille Pattavina, and Giancarlo Gavioli  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 5, Issue 4, pp. 305-315 (2013)
http://dx.doi.org/10.1364/JOCN.5.000305


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Abstract

For decades, optical networks have provided larger bandwidths than could be utilized, but with the increasing growth of the global Internet traffic demand, new optical transmission technologies are required to provide a much higher data rate per channel and to enable more flexibility in the allocation of traffic flow. Currently, researchers are investigating innovative transceiver architectures capable of dynamically adapting the modulation format to the transmission link properties. These transceivers are referred to as elastic and enable flexible allocation of optical bandwidth resources. To exploit their capabilities, the conventional fixed spectrum grid has to evolve to provide a more scalable and flexible system that can provide the spectral resources requireded to serve the client demand. The benefits of elastic transceivers with distance-adaptive data rates have been evaluated in optical core networks, but their application to metro ring networks has still not been addressed. This paper proposes methods based on integer linear programs and heuristic approaches to solve the routing, modulation level, and spectrum assignment problem in optical rings with elastic transceivers and rate-adaptive modulation formats. Moreover, we discuss how to analytically compute feasible solutions that provide useful upper bounds. Results show a significant reduction in terms of transceiver utilization and spectrum occupation.

© 2013 Optical Society of America

OCIS Codes
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(060.4256) Fiber optics and optical communications : Networks, network optimization
(060.4262) Fiber optics and optical communications : Networks, ring

ToC Category:
Research Papers

History
Original Manuscript: October 5, 2012
Revised Manuscript: December 23, 2012
Manuscript Accepted: January 10, 2013
Published: March 18, 2013

Citation
Cristina Rottondi, Massimo Tornatore, Achille Pattavina, and Giancarlo Gavioli, "Routing, Modulation Level, and Spectrum Assignment in Optical Metro Ring Networks Using Elastic Transceivers," J. Opt. Commun. Netw. 5, 305-315 (2013)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-5-4-305

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