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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 6, Iss. 2 — Feb. 1, 2014
  • pp: 138–151

Integrated OTN/WDM Switching Architecture Equipped With the Minimum Number of OTN Switches

V. Eramo, M. Listanti, R. Sabella, and F. Testa  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 6, Issue 2, pp. 138-151 (2014)
http://dx.doi.org/10.1364/JOCN.6.000138


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Abstract

In packet-optical integrated transport nodes for metropolitan networks, the wavelength data rate of the transponders has increased quickly to 10, 40, and 100 Gbps to reduce the cost of the transported bit. Meanwhile, the majority of the client data rate in routers and packet switches are still operating at 1, 2.5, and 10 Gbps. In this scenario, the introduction of optical transport network (OTN) switching technology enables an efficient wavelength bandwidth utilization and reduces the number of wavelengths, leading to reduced network costs. It has been shown that the use of integrated OTN/WDM switch architecture is cost effective because it reduces the number of short-reach client interfaces. The OTN/WDM also reduces the rack space and the power consumption compared to an architecture that uses a reconfigurable optical add–drop multiplexer and a separate standalone OTN switch or one that uses back-to-back muxponder connections to perform manual grooming. We introduce and investigate the performance of a new integrated OTN/WDN switching architecture in which the number of OTN switches is minimized. We propose an analytical model for the evaluation of the switch-blocking probability when two different OTN switch assignment policies are used. We show how the number of OTN switches can be reduced if a suitable dimensioning procedure is performed and depending on the traffic percentage needing OTN switching. As an example, if traffic is less than 45%, then the new proposed OTN/WDM switching architecture allows for 25% savings in OTN switching resources in the case of a switch with 4 input/output lines, 48 wavelengths, and 12×12 OTN switches.

© 2014 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.1155) Fiber optics and optical communications : All-optical networks
(060.4253) Fiber optics and optical communications : Networks, circuit-switched
(060.6718) Fiber optics and optical communications : Switching, circuit

ToC Category:
Research Papers

History
Original Manuscript: July 1, 2013
Revised Manuscript: November 27, 2013
Manuscript Accepted: December 1, 2013
Published: January 20, 2014

Citation
V. Eramo, M. Listanti, R. Sabella, and F. Testa, "Integrated OTN/WDM Switching Architecture Equipped With the Minimum Number of OTN Switches," J. Opt. Commun. Netw. 6, 138-151 (2014)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-6-2-138

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