The Way to EPON and NG-PON2
Needs are increasing
The need for faster data transmission to network operators’ end customers is growing. Passive Optical Networks (PON) and Fiber to the Home (FTTH) have to become more efficient. Innovations in laser technology are becoming apparent. The standardization committees are raising the bar.
After the new GE-PON and 10GE-PON standards (which allow transmission at 10 Gbit/s in both directions), the IEEE is now working on a 100 Gbit/s solution (IEEE P802.3ca). The ITU has evolved the GPON standard to XG-PON and XGS-PON. This allows symmetric transmission at 10 Gbit/s over a 20 km range.
XGS-PON can be seen as a part of a bigger network architecture: Next Generation PON or NG-PON2. In this new technology, 4 to 8 channel pairs can be used in such a way that multiplexing is not only happening in time, but also in wavelength. This, however, requires the use of innovative lasers which are currently still relatively expensive.
Pay as you grow
The model can be organized on a “pay as you grow” basis. Network operators only have to integrate new wavelengths when they require more bandwidth on site. At the same time, they can use the existing passive network.
The current PON developments can help network operators to reduce investment risks when extending their FTTH networks. FTTH is becoming more competitive and offers economic advantages.
At the same time it also opens up new perspectives. Because backhaul and fronthaul FO networks can be extended at more favorable prices on the basis of PON developments. And this extension will be necessary to be able to successfully operate the forthcoming 5G cellular phone services.
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