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Routing, modulation, spectrum and launch power assignment to maximize the traffic throughput of a nonlinear optical mesh network

Ives, DJ; Bayvel, P; Savory, SJ; (2015) Routing, modulation, spectrum and launch power assignment to maximize the traffic throughput of a nonlinear optical mesh network. Photonic Network Communications , 29 (3) pp. 244-256. 10.1007/s11107-015-0488-0. Green open access

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Abstract

We investigate the optimization of routing, modulation format adaptation, spectral and launch power assignment as a means of improving the utilization of limited network resources and increasing the network throughput. We consider a transparent optical network operating in the nonlinear transmission regime and using the latest software adapted coherent optical techniques. We separate the problem into one of routing, modulation adaption and channel assignment, followed by channel spectral assignment, and launch power allocation. It is shown, for three test networks, that the launch power allocation and channel spectral assignment can improve the transmission SNR margin over the fixed modulation, fixed power, fully loaded link worst case by approximately 3–4 dB. This increase in SNR margin can be utilized through modulation format adaption to increase the overall network throughput. This paper highlights that increased gains in network throughput can be achieved in nonlinear impaired networks when individual transmitter spectral assignment and launch power are optimized to minimize the nonlinear interference.

Type: Article
Title: Routing, modulation, spectrum and launch power assignment to maximize the traffic throughput of a nonlinear optical mesh network
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s11107-015-0488-0
Publisher version: http://dx.doi.org/10.1007/s11107-015-0488-0
Language: English
Additional information: Copyright © Springer Science+Business Media New York, 2015. The final publication is available at Springer via http://dx.doi.org/10.1007/s11107-015-0488-0
Keywords: Offline routing, Nonlinear impairments, Modulation adaption, Power optimization
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1463839
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