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gfast map nov

Dark Green: Firm commitments from incumbent: BT (10M), Belgacom, Australian NBN, Swisscom,  Austria, Bezeq Israel, Chunghwa Taiwan, Telus Canada, Telekom South Africa, SK Korea, (U.S.) AT&T, Century, Frontier, Windstream, Belgium, Omantel

Mid Pink: Smaller carriers in Germany, Norway, Finland, Japan

Light Green: Incumbent likely:  France, Germany, Italy

metanoiaWorking with Huawei. Metanoia, also known as Yi Chung, stays under the radar but they continue active in technical fora. They have participated in the UNH-BBF plugfests and have appeared occasionally at trade shows. As you can see from the spec sheets below, their chips are aimed at the mainstream G.fast market, They worked with Soft At Home on an SFP reference design. 

They also have been filing patents. These are by Chun-che Chang 

12/17/15 - 20150365131 - Crosstalk management for ofdm communication systems in power efficient transmission mode
In the present disclosure, several techniques are proposed to estimate the worst-case crosstalk noise and use it for bit-loading and SRA calculations so that fluctuating crosstalk when PET mode is enabled does not lead to system instability. One of the proposed techniques involves strategically placing some marker tones in the... 
Inventors: Chun-che Chang, Ravi Mantri(Metanoia Communications Inc.)



11/12/15 - 20150326305 - Framing mechanism for time-division-duplex ofdm communication systems
The present disclosure outlines mechanisms, systems, methods, techniques and devices that reposition a RMC symbol in a TDD frame. In one aspect, a method queues data transmission units (DTUs) for transmission in a TDD OFDM communication system, with each of the DTUs occupying a single symbol partially or fully, or... 
Inventors: Chun-che Chang, Sam Mungall(Metanoia Communications Inc.)

11/13/14 - 20140334283 - Dynamic rate adaptation methods in a vectored g.fast system
The present disclosure provides mechanisms, systems, methods, techniques and devices for dynamic rate adaptation in a vectored G.fast system. More specifically, a flexible framework that incorporates with residual crosstalk noise is provided.... 
Inventors: Chun-che Chang, Sam MungallTien-ke Huang(Metanoia Communications Inc.)

09/18/14 - 20140269957 - Dynamic bandwidth allocation in ofdm communication systems
Various embodiments of a mechanism of dynamic allocation of bandplan are provided. In one aspect, a communication device utilizes a bandplan during initialization in a digital communication system. The communication device modifies the bandplan after one or more channel estimations to optimize data rates of communications in a downstream direction... 
Inventors: Chun-che Chang (Metanoia Communications Inc.)

11/07/13 - 20130294298 - Framing mechanism for time-division-duplex ofdm communication systems
The present disclosure outlines mechanisms, systems, methods, techniques and devices that reposition a RMC symbol in a TDD frame. In one aspect, a method queues data transmission units (DTUs) for transmission in a TDD OFDM communication system, with each of the DTUs occupying a single symbol partially or fully, or... 
Inventors: Chun-che Chang, Sam Mungall(Metanoia Communications Inc.)

05/16/13 - 20130121435 - Crosstalk management for ofdm communication system in power efficient transmission mode
In the present disclosure, several techniques are proposed to estimate the worst-case crosstalk noise and use it for bit-loading and SRA calculations so that fluctuating crosstalk when PET mode is enabled does not lead to system instability. One of the proposed techniques involves strategically placing some marker tones in the... 
Inventors: Chun-che Chang, Ravi Mantri(Metanoia Communications Inc.)

12/20/12 - 20120324262 - Automatic power saving for communication systems
Various embodiments of a power saving scheme in data communication are provided. In one aspect, a method transmits a plurality of symbols each of which containing an overhead portion and at least a portion of a respective data transmission unit (DTU). In particular, the method transmits the overhead portion of... 
Inventors: Chun-che Chang, Sam MungallRavi Mantri(Metanoia Communications Inc.)

 

 

 

 

MT-G5321 

G.fast PHY 

- G.fast SFP transceiver hot-swappable Small Form Solutions

 
 
G.fast Features
  Frequency band 2.2MHz to 106MHz
  Modulation Discrete Multi Tone (DMT)
  Duplexing TDD (Time Division Duplexing)
  Sub carriers 2048 carriers with 12 bits / carrier
  Sub carrier spacing 51.75kHz
  ANDR 1Gbps (Aggregate Net Data Rate)
  FEC Trellis coding 
Reed-Solomon coding
  Maximum TX power 4dBm
  Handshake ITU-T G.994.1
OAM Features
  SOC, EOC, RMC Compliant
  SRA Seamless Rate Adaption
  Bit Swapping Compliant
  RPA RMC Parameter Adjustment
  FRA Fast Rate Adaptation
  TIGA Transmitted Initiated Gain Adjustment
Advance ITU Features
  G.inp Retransmission
  Vectoring Linear vectoring (CPE)
  NTR NTR transport on G.fast
  ToD Frequency synchronize and Time synchronize
Other Features
  QoS Flexible packet classify based on EtherType, VLAN ID or VLAN 
priority (supports QinQ).
  EBM Ethernet Boot & Management 
Interfaces
  MAC MII / RGMII
  Host / master SPI, I2C
MT-G2321

G.fast PHY 
- Single port G.fast PHY for both FTU-O and FTU-R

G.fast Features
  Frequency band 2.2MHz to 106MHz
  Modulation Discrete Multi Tone (DMT)
  Duplexing TDD (Time Division Duplexing)
  Sub carriers 2048 carriers with 12 bits / carrier
  Sub carrier spacing 51.75kHz
  ANDR 1Gbps (Aggregate Net Data Rate)
  FEC Trellis coding 
Reed-Solomon coding
  Maximum TX power 4dBm
  Handshake ITU-T G.994.1
OAM Features
  SOC, EOC, RMC Compliant
  SRA Seamless Rate Adaption
  Bit Swapping Compliant
  RPA RMC Parameter Adjustment
  FRA Fast Rate Adaptation
  TIGA Transmitted Initiated Gain Adjustment
Advance ITU Features
  G.inp Retransmission
  Vectoring Linear vectoring (CPE)
  NTR NTR transport on G.fast
  ToD Frequency synchronize and Time synchronize
Other Features
  QoS Flexible packet classify based on EtherType, VLAN ID or VLAN 
priority (supports QinQ).
  EBM Ethernet Boot & Management 
Interfaces
  MAC MII / RGMII
  Host / master SPI, I2C

The Site for gfast 230
 

G.fast News

I’m still working through remarkable presentations from the Broadband Forum events. Michael Weissman, Bernd Hesse and team did a remarkable job choosing the speakers. http://bit.ly/BBFBASE

Deutsche Telecom: 35b Supervectoring Delayed to 2019 http://bit.ly/35blater
Broadcom is now over 3 years late. DT briefed German reporters after their financial call and revealed 35b was now delayed until 2019. 35b should deliver 200+ meg downloads 500-600 meters, a crucial tool for DT, which is losing share to cable. Cable now covers about 70% of Germany and is expanding. DT now only offers 50-100 megabit DSL while cable is often 400 megabits, going to a gigabit. 

The problem is software; the hardware is shipping and supposedly will work. DT says 35b is not ready to turn on. Broadcom in 2015 said 35b was in "production" in the press release below. Alcatel in early 2016 said to expect complete systems very soon. "35g is very similar to 17a so there should be little delay."

Broadcom's problems are leading major telcos and vendors to have a plan B, using Sckipio G.fast. DT itself is planning extensive G.fast deployments in 2019, mostly in apartment buildings. http://bit.ly/35blater

Gigabit 100 Meters - Unless the Wires are Lousy http://bit.ly/gflousy
Speeds are fine, "Unless there's a line problem." I've been reporting for three years that ~10% of lines have problems. In the chart by Rami Verbin of Sckipio, he finds G.fast goes ~130 meters on good lines. Poor lines have about half the reach. 

His chart roughly matches the reports from Swisscom, Belgacom, and England for both G.fast & vectored DSL. The 10% with problems can cause the majority of the line-related complaints to support. The angry customers drive up cost.

Rami's solution to reach the gigabit is bonding, supported on the Sckipio chips. Verbin made some additional points:

  • 4 gigabits is possible by bonding two decent 2 gigabit lines.
  • Even in a service from remote cabinets, ~25% are close enough to get a full gigabit."
  • cDTA and iDTA are practical ways to deliver much higher upstream by switching some bandwidth from downstream to upstream only when needed.
  • 35B will probably be similar but Deutsche Telecom doesn't expect to deploy until 2019. http://bit.ly/gflousy

AT&T Wants Coax 2-5 Gigabit G.fast. Very Soon. http://bit.ly/ATTCoax
AT&T faces intense competition from cable, talking about 10 gigabits in both directions. (Cable will only be 1 gig down, ~100 meg up, until ~2021.) AT&T wants something to brag about as well.

AT&T gained millions of lines of coax as part of the DirecTV deal. Alcatel and Huawei are leading the development of G.mgfast. That uses 424 MHz, full duplex, to achieve ~2.5 gigabits in both directions. The reach on telco twisted pair is only about 30 meters. On coax, those speeds can probably extend far enough to service most apartment buildings. Using 848 MHz, speeds can reach 5 gigabits. The ITU standards group has been aiming for 2019-2020 for G.mgfast, too slow for AT&T's marketers. David Titus wants a high-speed standard for coax "early in 2018." He believes that is "doable."http://bit.ly/ATTCoax

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