Walid Wakim

Near-Hitless Protection in IPoDWDM Networks

A new protection scheme that takes advantage of integrated DWDM interfaces on routers to enable a near-hitless switchover of traffic from a failing working path to a protection path, using pre-FEC error statistics.

IP-optical interaction during traffic restoration

We analyze the required interaction between the optical and IP layers to enable restoration of IP links in the optical layer. Significant interaction is needed to achieve a cost effective process that minimizes traffic impact.

Field trial demonstration and evaluation of a coherent 100G IP over WDM alien wavelength across 769 km of multiple WDM infrastructures without regeneration [invited]

We report the first successful coherent 100G IP over WDM alien wavelength field trial over WDM infrastructures spanning a total distance of 769 km, demonstrating the feasibility and robust performance of a simplified 100G IP over WDM core network architecture. Key performance aspects have been investigated including co-propagation of a 100G IP over WDM alien wavelength and native wavelengths generated from WDM transponders, polarization mode dispersion tolerance, and operation without in-line dispersion compensation modules. We also demonstrated the feasibility of a 100G IP over WDM alien wavelength over multiple WDM systems and optical router or regenerator bypass. In addition, we show evaluation results on the key performance management and monitoring functions with a coherent 100G IP over WDM optical interface in the core router.

Field trial demonstration and evaluation of coherent 100G IP over WDM alien wavelength across 769km of multiple WDM infrastructures without regeneration

We report the first successful coherent 100G IP over WDM alien wavelength field trial over WDM infrastructures of total 769km, demonstrating the feasibility and robust performance of the 100G IP over WDM core network architecture.

Proactive protection based on pre-FEC statistics in pure IP networks

We extend the implementation of proactive protection to pure IP protection schemes and test its performance over a real DWDM system and additional failure modes: PMD injection and mechanical disconnection.

Network architecture in a converged optical + IP network

As demands on Provider Networks continue to grow at exponential rates, providers are forced to evaluate how to continue to grow the network while increasing service velocity, enhancing resiliency while decreasing the total cost of ownership (TCO). The bandwidth growth that networks are experiencing is in the form packet based multimedia services such as video, video conferencing, gaming, etc... mixed with Over the Top (OTT) content providers such as Netflix, and the customers expectations that best effort is not enough you end up with a situation that forces the provider to analyze how to gain more out of the network with less cost. In this paper we will discuss changes in the network that are driving us to a tighter integration between packet and optical layers and how to improve on todays multi - layer inefficiencies to drive down network TCO and provide for a fully integrated and dynamic network that will decrease time to revenue.

40 Gb/s Transmission over a Reconfigurable 10 Gb/s WDM system scaling beyond 1000 km of G.652 fiber.

In this report, the first to our knowledge, 40 Gb/s transmission over a fully reconfigurable 10 Gb/s WDM system, that leveraging 40 Gb/s ODB channels, demonstrates a WDM system scaling beyond 410 Gb/s and 1000 km (12times80 km) of G.652 fiber, with 3 dB margin, even after the ROAMD filter concatenation, and typical residual chromatic dispersion penalties