Telefónica España and Alcatel-Lucent trial 100, 200 and 400 Gbps data transmissions over an optical network
The solution, which employs “agile optical networking” technology, more than doubles an operator’s fiber capacity without having to invest in additional optical fiber infrastructure. The trial, made using Telefónica live network in Spain, successfully demonstrated the capacity of Telefónica España existing network to operate at different combinations of line rate, reach, and spectrum width to provide the best balance between network performance and resource usage.
With the advances proven in the trial, Telefónica España will be able to meet the ever growing capacity demand of its customers. It will also use the new network flexibility to increase overall network resilience in working around outages or failures by diverting capacity to where it is needed in the network. GMPLS-based control plane intelligence will allow new ways for protecting highly meshed traffic dynamically so that subscribers can have their expectations met even when there are one or more failures in the network.
The trial successfully demonstrated flexible optical networking with adaptive 100 Gbps, 200 Gbps and 400 Gbps transmission on a live network through the live optical channel successfully adapting to different speeds, distances and spectrum. This technology enables maximizing fiber performance: each channel is assigned just the piece of spectrum required for the performance needed in each case, and adjusts the parameters to have optimum speed/distance balance. The trial has demonstrated the capacity of Telefónica España network to scale up by a factor of 2.66 to 23 Terabits per second (Tbps) in a single fibre pair.
To perform the trial, the photonic mesh of Telefónica España at Catalonia was equipped with Alcatel-Lucent’s latest 400G adaptive-modulation transponder and flexible grid ROADM integrated in the 1830 Photonic Service Switch. The field trial was carried out over an operational 1830 PSS mesh network carrying 40 Gbps channels with live traffic. New 100 Gbps, 200 Gbps, and 400 Gbps light paths were established using PDM-QPSK and PDM-16QAM formats: 100 Gbps and 200 Gbps channels were provisioned with either 50 GHz or 37.5 GHz spacing, while 400 Gbps channels were tested using either 100 GHz or 75 GHz spacing.
The maximum tested distance was around 650 km, on the longest available path in the network. Commercially available flexible grid ROADMs were used to create 37.5 GHz and 75 GHz channels. All channel configurations were generated using the 400 Gbps module based on the Alcatel-Lucent 400Gbps Photonic Service Engine chip, featuring real-time coherent detection and soft-decision FEC. The switch among different operating modes only involved software commands.
www.telefonica.com
www.alcatel-lucent.com
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