Telecoms are opting to build Fiber to the Node (FTTN) network architectures to leverage their existing copper lines and avoid the hefty installation costs associated with Fiber to the Home (FTTH) deployment. But even with standards such as G.fast, Docsis 3.1 and VDSL2 vectoring, Telecoms are having trouble delivering stable 100 Mbps performance. Though VDSL2 vectoring has helped deliver faster speeds to the last mile of a customer’s premise, Alcatel-Lucent has revealed that VDSL2 Vectoring alone is not enough to stabilize 100 Mbps throughput.
Merging VDSL2 Vectoring With G.inp
Originally standardized in 2010 by the International Telecommunication Union (ITU), G.inp promises to counteract against other noise sources such as impulse noise or radio noise, making 100 Mbps speeds more obtainable using VDSL2 vectoring.
VDSL2 Vectoring eliminates signal attenuation and cross talk in the digital subscriber lines (DSL). Because VDSL2 utilizes higher frequencies than traditional analog telephone signals, the wider spectrum shortens copper loop length. VDSL2 vectoring utilizes a process called Digital Signal Processing (DSP) to measure crosstalk in a copper bundle to generate an anti-noise signal that nullifies the noise.
Types of Signals G.inp Regulates
But according to Alcatel-Lucent, vectoring alone does not counteract against other noises sources such as impulse noise or radio noise. The G.998.4 standard, otherwise known as G.inp, removes the leakage of signals in copper pairs caused by common household items. The standard is meant to improve impulse behavior generated from “any appliance with an electric motor, power switch or power adapter.” Weaker copper lines are the most susceptible to this type of noise interference.
G.inp regulates two types of signals: Single High Impulse Noise Event (SHINE) which consist of erratic signals caused by appliances that are turned on and off and Repetitive Electrical Impulse Noises (REIN) which consist of intermittent signals sometimes caused by Household Dimmers and Fault power adapters.
Alcatel asserts that “G.inp increases stability, reduces latency, and makes the 100 Mbps speeds stable.”
G.inp will enable Telecoms to deliver stable 100 Mbps through put using Fiber to the Node (FTTN) network architectures, a medium term solution that helps ISPs prepare for the high demand for faster broadband.
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