Rosanna Pastorelli

The LOGON strategy for low-complexity control plane implementation in new-generation flexible networks

Recently proposed non-linear propagation models allow to derive simple link optimization rules. We show that local optimization leads to global optimization (LOGO) and propose a network optimization strategy (LOGON) that allows substantial control-plane simplification.

Network planning strategies for next-generation flexible optical networks [invited]

Using well-established results on nonlinear propagation modeling in coherent optical links, two different approaches for network planning are addressed and compared in terms of performance maximization and robustness to dynamic changes in the network, one based on maximization of the margin in the optical signal-to-noise ratio, the other on minimization of the pre-forward-error-correction bit error rate (BER). We show that, in pure coherent optical networks, the planning strategy that best supports the dynamic evolution of the network is the design aimed at BER minimization. A closed-form formula for the maximum reach (in terms of number of spans and loss budget) of each interface is analytically derived, which is a useful tool for the evaluation of the overall network cost for a desired traffic capacity.

Network planning strategies for next-generation flexible optical networks

Using well-established results on non-linear propagation modeling in coherent optical links, two different approaches for network performance optimization are addressed and compared in terms of performance maximization and robustness to dynamic changes in the networkThe benefits of the SDN control plane to drive fast restoration are demonstrated on flexible optical networks. Required OpenFlow extensions are detailed. Simulations report improved recovery time with respect to GMPLS/PCE restoration.

Network optimization strategies and control plane impacts

Network planning strategies based on GN-model are explored and compared to identify the best solution that maximizes network flexibility. An optical architecture for real-time network optimization is presented and implications at optical control plane are discussed.

Flexible and reconfigurable metro-regional WDM scaling beyond 32/spl times/10 Gb/s and 1000 km of G.652 fiber

This study explores the performance of operationally flexible, and fully channel reconfigurable, cost-effective metro WDM. This work also demonstrates an industrial-quality 32 /spl times/ 10 Gb/s system with commercially available technology that achieves 15 /spl times/ 20 dB, scaling beyond 1000 km of standard (G.652) fiber, far exceeding the previously reported related results.

What is the right physical layer model for a highly dynamic reconfgurable optical network

We investigated the variability of non-linearity generation in dynamically-reconfigurable network scenarios with re-routing, non-homogenous formats and variable accumulated dispersion among channels. Based on the results, we discuss practical modeling options fore real-time physical-layer awareness in dynamically reconfigurable networks.

Design and demonstration of a reconfigurable metro-regional WDM 32 /spl times/ 10 Gb/s system scaling beyond 500 kin of G.652 fiber

We demonstrate a industrial-strength 32 /spl times/ 10 Gb/s WDM system with multiple reconfigurable optical-add/drop nodes that enables metro regional networks to cost-effectively scale to < 500 km with span and installation/maintenance flexibility.

Network Planning Strategies for Next-Generation Flexible Optical NetworksOptical Fiber Communication Conference

Using well-established results on non-linear propagation modeling in coherent optical links, two different approaches for network performance optimization are addressed and compared in terms of performance maximization and robustness to dynamic changes in the networkThe benefits of the SDN control plane to drive fast restoration are demonstrated on flexible optical networks. Required OpenFlow extensions are detailed. Simulations report improved recovery time with respect to GMPLS/PCE restoration.