Authors: Stefan Dahlfort and Diego Caviglia
While some steps have been made to integrate the two transport networks, a fully integrated solution that includes logical integration of all planes – data, control, and management – is still needed.
For example, coherent technology combined with say flexible grid allocation, multi-rate transmitters/receivers – as part of elastic optical networks (EON) – and super-channels allows optical transmission systems to cope with increasing capacity demand without costly upgrades to the physical fiber network.
In addition to these operational benefits, IP-optical convergence puts DWDM optics directly onto router line cards, which is advantageous from a technical point of view, but also has a number of drawbacks.
So the questions that need to be answered are: when is it desirable or necessary to keep operations, and perhaps ownership of IP and optical transport separate, and when should they be integrated?
This Ericsson Review article outlines such a solution, which we refer to as IP-optical convergence.