The Full Service Access Network (FSAN) has outlined its vision for fibre access networks for the coming decade.
FSAN is an industry forum that includes over 20 operators and has 70 members. The group identifies service requirements and develops optical access technologies that it passes to the ITU for standardisation.
The latest FSAN technologies to become standards are XGS-PON (10 gigabits symmetrical passive optical network) and the multiple wavelength TWDM-PON (time wavelength-division multiplexing passive optical network), also known as NG-PON2.
“One of the messages of the roadmap is that, in the immediate future, what FSAN wants to do is evolve the existing standards,” said Peter Dawes, FSAN NGPON co-chair.
An obvious way the existing PONs can be evolved is to adopt 25-gigabit wavelengths. This would enable a 25-gigabit symmetrical extension to XGS-PON and a future TWDM-PON variant with up to 200 gigabits of capacity if the standard’s full eight wavelengths are used.
One application that could use such high capacities is mobile front-haul. “It can eat as much bandwidth as you can supply once you start to aggregate [radio] antennas,” said Dawes.
After 2020, FSAN will investigate disruptive technologies as it defines future optical access schemes. R&D work, new modulation schemes and component developments including silicon photonics will all be assessed as to their suitability for optical access schemes.
FSAN says it will also review its roadmap on a yearly basis and amend it as required.
Press release: FSAN Releases New Roadmap for Fibre Access Standards
FSAN Roadmap: https://www.fsan.org/roadmap/
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