Se ha denunciado esta presentación.
Utilizamos tu perfil de LinkedIn y tus datos de actividad para personalizar los anuncios y mostrarte publicidad más relevante. Puedes cambiar tus preferencias de publicidad en cualquier momento.

Gigabit Copper 2015 David Baum Keynote Speech

1.512 visualizaciones

Publicado el

David Baum, co-founder and CEO of Sckipio Technologies - the leading G.fast chipset vendor presented at the Gigabit Copper conference in Munich, Germany. David presented the great performance of G.fast and how G.fast will be deployed by major service providers globally.

Publicado en: Internet
  • Sé el primero en comentar

  • Sé el primero en recomendar esto

Gigabit Copper 2015 David Baum Keynote Speech

  1. 1. ULTRA BROADBAND FOR THE MASSES
  2. 2. 27-Mar-15Sckipio | How Do We Make G.fast Real2 HOW DO WE MAKE G.FAST REAL The Best Practices for Deploying G.fast David Baum Co-founder and CEO, Sckipio Technologies
  3. 3. 27-Mar-15Sckipio | How Do We Make G.fast Real3 7 SECRETS TO SUCCEEDING IN G.FAST DEPLOYMENTS
  4. 4. 27-Mar-15Sckipio | How Do We Make G.fast Real4 SECRET #1: MODEL THE BUSINESS
  5. 5. 27-Mar-15Sckipio | How Do We Make G.fast Real5 WHAT’S THE BIG G.FAST IDEA? Leverage your existing copper wiring to deliver ultra broadband to the masses
  6. 6. 27-Mar-15Sckipio | How Do We Make G.fast Real6 PROBLEM OF SUBSCRIBER DROP •Trenching on premises •Installation scheduling & cost •Right of way issues •Roll-out delays due to capacity of installers •Very expensive overall Average 1.8km Average 500m Average 100m $$$
  7. 7. 27-Mar-15Sckipio | How Do We Make G.fast Real7 Central Office VDSL2 800-1,000 meters Less than 140Mbps G.fast Distribution Point 30-400 meters Up to 1Gbps Fiber to the Home Over 1 Kilometer Over 1Gbps Fiber Twisted Pair
  8. 8. 27-Mar-15Sckipio | How Do We Make G.fast Real8 G.FAST IS VERY FAST! 700 Mbps 100 meters 500Mbps 200 meters 350Mbps 300 meters 270Mbps 400 meters 150Mbps 500 meters Numbers are aggregate upstream/downstream 16 lines with crosstalk
  9. 9. 27-Mar-15Sckipio | How Do We Make G.fast Real9 NEW ≠ MORE EXPENSIVE Cost per port FTTH Cost per port VDSL VECTORING Cost per port G.FAST G.FAST Lowest cost per port
  10. 10. 27-Mar-15Sckipio | How Do We Make G.fast Real10 SECRET #2: FOCUS ON POWER
  11. 11. 27-Mar-15Sckipio | How Do We Make G.fast Real11 IMPORTANCE OF POWER • G.fast leverages reverse power • Everything driven from power budget – Distance it can go – Size of unit – Overall cost
  12. 12. 27-Mar-15Sckipio | How Do We Make G.fast Real12 Cost vs. Power Consumption Impact of power consumption on the equipment housing cost • Reference: Adtran ITU-T contribution 2012-02-4A-058R1, a case study done in 2012 0 1 2 3 4 5 6 7 8 0 10 20 30 40 50 60 70 NormalizedComplexity Max Power Dissipation (Watts) 16 with DO no DO 16 24 24
  13. 13. 27-Mar-15Sckipio | How Do We Make G.fast Real13 WHAT DRIVES POWER CHOICES • Discontinuous operation • Vectoring • Training times and low power states • G.int and network management
  14. 14. 27-Mar-15Sckipio | How Do We Make G.fast Real14 POWER COMPARED TO VDSL • Time Division Duplexing • Frequency Division Duplexing • Fast retraining • Slow retraining • Low power default • Default: Always broadcasting • Power down each port • All ports active • Fast vector pairing • Slow vector pairing VDSL
  15. 15. 27-Mar-15Sckipio | How Do We Make G.fast Real15 SECRET #3: UNDERSTANDING VECTORING
  16. 16. 27-Mar-15Sckipio | How Do We Make G.fast Real16 CROSSTALK IS BANDWIDTH KILLER 0 20 40 60 80 100 120 140 160 180 200 -160 -150 -140 -130 -120 -110 -100 -90 -80 -70 Channel and FEXT for BT 100m line Frequency [MHz] SignalandFEXT[dBm/Hz] 10dB Received signal FEXT sum
  17. 17. 27-Mar-15Sckipio | How Do We Make G.fast Real17 G.FAST = VECTORING
  18. 18. 27-Mar-15Sckipio | How Do We Make G.fast Real18 DYNAMIC VECTORING IS KEY • Real time • Must respond in time • Built-in vectoring critical
  19. 19. 27-Mar-15Sckipio | How Do We Make G.fast Real19 SECRET #4: UNDERSTAND THE TRANSITION FROM VDSL
  20. 20. 27-Mar-15Sckipio | How Do We Make G.fast Real20 HOW G.FAST DIFFERS FROM VDSL Parameter VDSL G.FAST Frequency Range Up to 30MHz (30a) 2-106MHz, 2-212MHz (future) Max Rate Up to 250Mbps (30a) and 150Mbps (17a) for short loops, real-world is 30-80Mbps 1Gbps over short loops, exceeding 500 Mbps over real 100m lines Modulation OFDM OFDM Number of carriers 4K (8K for future V+) 2K (for 106MHz profile) Multiplexing scheme FDD TDD, synchronized among the different copper pairs Symbol time ~250 μsec (17MHz profile) ~20 μsec Vectoring Via G.993.5 Supported, with adaptations needed for higher frequency Tx power Varies by profile, 14.5dBm 4dBm FEC RS + Trellis code RS + Trellis code
  21. 21. 27-Mar-15Sckipio | How Do We Make G.fast Real21 HOW G.FAST DIFFERS FROM VDSL Parameter VDSL G.FAST Downstream/Upstream ratio Fixed Configurable: 90:10 to 30:70 Customer self-install Questionable. i.e. rates become marginally low Yes xDSL Spectral compatibility Issues with 17M/30M mix Issues with CAB/DP Mix Yes, fresh start with new frequency band Retrain time Very long (30-90 second range) Very short – few seconds Rate adaptation Very slow, 128 carriers at a time, SOS not robust Very fast, quick and robust adaptation – within few msec Low power mechanisms Under definition, expected savings up to 50%, very slow wake up time Specified from day one, discontinuous operation, scales with traffic rate
  22. 22. 27-Mar-15Sckipio | How Do We Make G.fast Real22 CO-EXISTENCE WITH VDSL • VDSL and G.fast can co-exist • Separate by frequency VDSL G.FAST Up to 17Mhz 20-106Mhz
  23. 23. 27-Mar-15Sckipio | How Do We Make G.fast Real23 VDSL & G.FAST ARE USUALLY NOT CO-LOCATED •Most operators install VDSL far from the DP •When deploying G.FAST, legacy VDSL service will continue without interferences •The service can be gradually upgraded to G.FAST Average 500m Average 100m VDSL G.FAST 20-106MHz 17MHz Co-Existence
  24. 24. 27-Mar-15Sckipio | How Do We Make G.fast Real24 APPROACH MOST ARE TAKING • Bring fiber to the DPU • Keep infrastructure as is (ADSL/VDSL) • Using diplexer in the DPU to merge the lines • Migrate gradually to G.fast over time without truck roll
  25. 25. 27-Mar-15Sckipio | How Do We Make G.fast Real25 VDSL FALLBACK • Not required by ITU or Broadband Forum • Most service providers won’t deploy • Don’t want to double pay for existing VDSL customers – They already have VDSL running, no need to pay again • Cross-technology vectoring is challenging – If integrated into a single chip – extremely complex and inefficient • If needed, can be implemented with two-chip solution
  26. 26. 27-Mar-15Sckipio | How Do We Make G.fast Real26 SECRET #5: FIND THE SWEET SPOT
  27. 27. 27-Mar-15Sckipio | How Do We Make G.fast Real27 DEPLOYMENT OPTIONS
  28. 28. 27-Mar-15Sckipio | How Do We Make G.fast Real28 MDU IS KEY USE-CASE
  29. 29. 27-Mar-15Sckipio | How Do We Make G.fast Real29 DPU IN THE BASEMENT • Smaller buildings • Fiber to the DPU • DPU in basement • 1:16 today to CPE • 24 feasible now, 48 future
  30. 30. 27-Mar-15Sckipio | How Do We Make G.fast Real30 DPU ON EACH FLOOR • FTTF (Fiber to the Floor) • Larger buildings • Fiber to riser (WDM-PON, GPON) • DPU on each floor • 1:16 for each floor • 24 feasible now, 48 future x16 x16 x16 x16 x16 Fiber . . . Floor 1 . . . . . . Floor 2
  31. 31. 27-Mar-15Sckipio | How Do We Make G.fast Real31 OUTDOOR PLANT • Row housing • Fiber down street (WDM-PON, GPON) • DPU to each building or section of building • Reverse power feed from CPE to power DPU
  32. 32. 27-Mar-15Sckipio | How Do We Make G.fast Real32 SECRET #6: STAY DYNAMIC
  33. 33. 27-Mar-15Sckipio | How Do We Make G.fast Real33 PROBLEMS TO SOLVE • The high G.fast frequencies increase the risk of changes in the channel – Lower noise floor on the high band with vectoring implies exposure to various noise sources – Higher cross-talk cancellation levels (as FEXT is very high) implies higher sensitivity – Neighboring lines • Lessons learned from VDSL – You cannot avoid changes on the line, you can only: • Adapt quickly and reliably to avoid retrains • If retrain still occurs, shorten the retrain time to keep good user experience • Higher performance – Increasing the noise margin to improve stability is not a good strategy! – Noise margin is never high enough, need to use it only when we have to (for a short time)
  34. 34. 27-Mar-15Sckipio | How Do We Make G.fast Real34 FAST OLR - Online Reconfiguration Use of noise margin Slow adaptations Fast and robust adaptation Old paradigm New paradigm
  35. 35. 27-Mar-15Sckipio | How Do We Make G.fast Real35 FAST RETRAINING • Critical to success • Responsive to dynamic line conditions • Target - limited to just few seconds
  36. 36. 27-Mar-15Sckipio | How Do We Make G.fast Real36 SECRET #7: CHALLENGE YOUR ASSUMPTIONS
  37. 37. 27-Mar-15Sckipio | How Do We Make G.fast Real37 G.FAST GOING FURTHER 700 Mbps 100 meters 500Mbps 200 meters 350Mbps 300 meters 270Mbps 400 meters 150Mbps 500 meters Numbers are aggregate upstream/downstream 16 lines with crosstalk
  38. 38. 27-Mar-15Sckipio | How Do We Make G.fast Real38 CHALLENGES TO OVERCOME • Bad environments – Untwisted pairs – Quad pairs – Power lines running in parallel – Ham radio interferences • Dynamic response works
  39. 39. 27-Mar-15Sckipio | How Do We Make G.fast Real39 FUTURE OPPORTUNITIES • Bonding • Mobile backhaul • Wider bandwidth • New applications
  40. 40. 27-Mar-15Sckipio | How Do We Make G.fast Real40 7 SECRETS TO SUCCEEDING IN G.FAST DEPLOYMENTS 1. Model the business 2. Focus on power 3. Understand vectoring 4. Understand the transition from VDSL 5. Find the sweet spot 6. Stay dynamic 7. Challenge your assumptions
  41. 41. ULTRA BROADBAND FOR THE MASSES

×