Hello, everyone!
In today's topic, I will briefly explain the new DSL technology, better than G.fast technology. It is NG-fast or XG-fast. Very little good data can be found on this technology. In general, this is a new technology, which was started by Huawei, and later other companies joined. Let's get to know each other briefly!
In November 2017, at the Broadband World Forum (BBWF) in Berlin, Huawei launched a new DSL technology – NG-Fast. It was the first prototype of DSL technology that enables huge utilization of copper - bandwidth up to 10 Gbit/s. That is why this technology is also called XG.fast.
The main drivers of the development of new DSL technologies are the same as for PON technology - high customer requirements and new services - smart home, Internet of Things (IoT), 4K, 8Kand 12K UHD videos, virtual reality (VR), telemedical, etc. As I explained in the previous two articles on G.fast technology, the main reason for the further development of this technology is the inability to implement the FTTH PON solution.
The prototype that Huawei showed has 4 ports and supports crosstalk cancellation. Ports can operate simultaneously. Each port can deliver a data rate of 5.1 Gbps (in both directions)at a distance of about 30 m or 3.4 Gbps (in both directions)at a distance of about 100 m. The crosstalk that occurs is eliminated. Full-duplex is used to increase spectrum utilization.
The main features of the new DSL technology are:
upper limit frequency 212 MHz (424 MHz and 848 MHz),
full-duplex operation,
symmetrical data rates of 5 Gbps and 10 Gbps, and
work on short copper lines of poor quality.
In the next figure, we can see one scenario for NG-fast.
Large telecommunications operators, such as BT and Swisscom, are already testing Huawei NG-fast equipment. In Switzerland, the testing was successful and the implementation plan is encouraging. In 2017, here's what Heinz Herren, Swisscom CTO, and CIO, said: “Ten years ago, any engineer worth their salt would have shaken their head in disbelief at talk of gigabit bandwidths on copper cables combined with fiber optics. Who would have imagined that we would come so far in such a short time? At Swisscom, we are constantly looking for new technologies that can be used to expand our network capacities more efficiently, quickly and cheaply. This means that our customers will soon benefit from higher bandwidths and digital advances. Thanks to the broad technology portfolio that is already in place today, Swisscom is well-positioned to plan an upgrade to cover almost all of Switzerland by 2021, including densely populated areas as well as the countryside. NG.fast is a promising option for further optimising the expansion in future.”
It is considered that the target period for the implementation of this technology is 2030.
This is the end of this topic. I hope you learned something new!
Thank you!
