The submarine network seascape in 2020
Submarine networks carry over 99% of intercontinental data traffic making it critical infrastructure to be protected and innovated upon at a frantic rate to maintain pace with the approximately 40% bandwidth growth in all submerged corridors of our world. Ciena’s submarine networking expert, Brian Lavallée, highlights key areas for focused innovation throughout 2020.
By Brian Lavallée – There are several key technologies that are the focus of submarine network innovation and will garner a great deal of time, money, resources, and attention in 2020. These technologies will once again allow submarine cable operators to modernize their submerged assets and not only maintain pace with voracious and ongoing growth in bandwidth demand but provide critical competitive differentiation as well. I cover below these key technology innovation areas that I believe will dominate the discussion seascape throughout 2020.
With voracious and ongoing bandwidth growth experienced for many years now, coupled with expanding rollout of 5G services that significantly increase access speeds to content hosted in data centers, cable operators are constantly seeking new ways to increase available bandwidth between continental landmasses for Data Center Interconnection (DCI) purposes – satellite networks need not apply!
Although Submarine Line Terminating Equipment (SLTE) has been constantly innovative upon at a frenetic pace for the past decade, the wet plants they connect to have experienced comparatively little innovation – until now. Wet plants leveraging SDM technology offer more fiber pairs than traditional submarine cables, and although SDM cables support less capacity per fiber pair, they have a much higher overall capacity due to far more pairs (12 and higher), which is further enhanced with power-optimized repeater (misnomer for subsea optical amplifier) designs.
As an industry proof point, the first SDM-based submarine cable deployed is the transatlantic Dunant cable, which supports up to 250Tb/s of overall capacity over an aggregate of 12 fiber pairs, which is many more than the traditional 6 to 8 fiber pairs offered on recent submarine cable deployments. more>