ESTIMATION UNCERTAINTIES IN THE OPTICAL SIGNAL-TO-NOISE RATIO NETWORK OPTIMIZATION
Keywords:optical networks, optical signal noise ratio, uncertainties, optimization algorithm
In this work, we investigate the effects of estimation uncertainties in the optimization of the optical signal-to-noise ratio (OSNR) at the wavelength division multiplexing (WDM) optical networks. The OSNR optimization increases the network throughput and energy efficiency and it enables to minimize the number of retransmissions by higher layers. The OSNR optimization algorithms are related with the optical channel estimation performed by the combinations of optical performance monitors (OPM) measurements, analytical models and simulations. Furthermore, the estimation uncertainties are introduced by several factors such as the availability of monitoring information, monitoring accuracy, imperfection of physical layer and dynamic of channel allocation. The main results have shown the relation between the uncertainties in the channel error estimation, normalized mean squared error (NMSE) and power penalty for an evaluated numerical example. The methodology developed could be utilized to determinate the maxim level of acceptable uncertainties in the channel error estimation according the power penalty permitted in the OSNR optimization.
OSA Optics and Photonics News, pp. 50-57, Sep. 2014.
 B. Birand, H. Wang, K. Bergman, D. Kilper, T. Nandagopal, G. Zussman, "Real-time power control for dynamic
optical networks - algorithms and experimentation," IEEE Journal on Selected Areas in Communications, vol. 32, no. 8,
pp. 1615 – 1628, Aug. 2014.
 R. Doverspike and J. Yates, “Optical network management and control,” Proc.IEEE, vol. 100, no. 5, pp. 1092–1104,
 Rodney S. Tucker, "Green Optical Communications - Part II: Energy Limitations in Networks", IEEE J Selected Topics
in Quantum Electronics, vol. 17, no. 2, pp. 261 – 274, March-April 2011.
 J. Sole-Pareta, S. Subramaniam, D. Careglio, and S. Spadaro, “Cross-layer approaches for planning and operating
impairment-aware optical networks,” Proc. IEEE, vol. 100, no. 5, pp. 1118–1129, May 2012.
 G. P. Agrawal, Fiber-optic communication systems, John Wiley & Sons, 2002.
 L. Pavel, “OSNR optimization in optical networks: Modeling and distributed algorithms via a central cost approach,”
IEEE J. Sel. Areas Commun., vol. 24, no. 4, pp. 54–65, Apr. 2006.
 F. R. Durand and T. Abrão, “Distributed SNIR Optimization Based on the Verhulst Model in Optical Code Path Routed
Networks With Physical Constraints”, J. Opt. Commun. Netw., vol. 3, no. 9, pp. 683–691, Sep. 2011.
 Y. Pan, and L. Pavel, “OSNR Game Optimization with Link Capacity Constraints in General Topology WDM
Networks, ” Optical Switching and Networking, vol. 11, Part A, pp. 1-15, Jan. 2014
 G. Pavani, L. Zuliani, H. Waldman and M. Magalhães, “Distributed approaches for impairment-aware routing and
wavelength assignment algorithms in GMPLS networks”, Computer Networks, vol. 52, no. 10, pp. 1905–1915, July
 Z. Pan, C. Yu, and A. Willner, “Optical performance monitoring for the next generation optical communication
networks,” Opt. Fiber Technol., vol. 16, no. 1, pp. 20–45, 2010.
 D. Kilper, R. Bach, D. Blumenthal, D. Einstein, T. Landolsi, L. Ostar, M. Preiss, and A. Willner, “Optical performance
monitoring,” J. Lightw. Technol., vol. 22, no. 1, pp. 294–304, Jan. 2004.
 S. Pachnicke, T. Gravemann, M. Windmann, and E. Voges, “Physically constrained routing in 10-Gb/s DWDM
networks including fiber nonlinearities and polarization effects,” J. Lightwave Technol., vol. 24, n. 9, pp. 3418–3426,
 S. Azodolmolky et al., “A novel impairment aware RWA algorithm with consideration of QoT estimation inaccuracy,”
J. Opt. Commun. Netw., vol. 3, pp. 290–299, Apr. 2011.
 T. Zami, A. Morea, F. Leplingard, and N. Brogard, “The relevant impact of the physical parameters uncertainties when
dimensioning an optical core transparent network,” in Proc. European Conf. Optical Communications (ECOC), 2008.
 L. Velasco, F. Agraz, R. Martínez, R. Casellas, S. Spadaro, R. Muñoz, and G. Junyent, “GMPLS-based multi-domain
restoration: Analysis, strategies, policies and experimental assessment,” J. Opt. Commun. Netw., vol. 2, pp. 427–441,
 L. Velasco, A. Jirattigalachote, M. Ruiz, P. Monti, L. Wosinska, and G. Junyent, “Statistical Approach for Fast
Impairment-Aware Provisioning in Dynamic All-Optical Networks”, J. Opt. Commun. Netw.,, vol. 4, no. 2, pp. 130-
D. Dahan et al.: Optical performance monitoring for translucent/transparent optical networks, IET Optoelectr., vol. 5, n.
1, pp. 1-18, Feb. 2011.