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Next-Gen Access Technologies: PON and DSL

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New technologies options include WDM-PON, VDLS2 bonding, G.fast, and more. In addition, there are new compression techniques and noise mitigation that extend the life of existing networks. …

New technologies options include WDM-PON, VDLS2 bonding, G.fast, and more. In addition, there are new compression techniques and noise mitigation that extend the life of existing networks.

Which approaches are practical, necessary and beneficial and what factors determine the best path to take?

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  • 100 Mbps to 100 M Homes22 M homes passed7.6 M homes connected
  • Transcript

    • 1. AFTERNext Generation Access TechnologiesPractical Considerations
    • 2. What’s Deployed Today? 1000 EFM Ethernet 1GbpsDownstream Speed (mbps) 100 2.5 GPON (100-200 Mbps effective) 75 EFM Ethernet 100Mbps 45 VDSL2 Bonded ADSL2+ EPON 24 ADSL2+ 1 3 5 7 9 11 13 15 17 19 Distance (kft) 2
    • 3. A Peek at New Technologies Technology Projected BW Availability Promised BenefitG.Vector 80-100 Mbps 2011 Improvements from reduction in crosstalk interferenceSuper MIMO 100 to 300 Mbps TBD Increased bonded link (Vendor specific) capacity via ‘phantom’ pair10G GPON / Splitter 2013 and Backwards compatible withGEPON dependent beyond existing PONsNG-PON2 40+ Gbps 2015 and Much higher bandwidth per aggregate beyond??? subscriber 3
    • 4. Considerations – InfrastructureCO / RT OSP CO / RT OSP CO / RT OSP FTTC Point to Point to Point MultipointOther Infrastructure Considerations RF vs IPTV Spectral management – DSL and PONs Aerial vs buried, right-of-ways, pole vs pad vs retrofit 4
    • 5. Considerations – VectoringVectoring has much promise but performance will vary Value is directly proportional to its widespread use in the OSP Pairs that are not within the vectored group can negatively impact pairs within the group by having power levels too high Benefits of vectoring most measurable at loops less than 4 kft Rate predictability should improve but reach remains an Achilles heel Best results come when all pairs are vectored 5
    • 6. 2.5 GPON Migration OptionsOption 1: 10G GPON Coexistence 2.5 GPON ONTs designed anticipating 10G GPON standardOption 2: Deploy blocking filters on existing ONTs Labor and truck roll intensive, makes sense in limited volumesOption 3: Utilize 10G only on new PONs Easiest approach from an operational and cost point of viewOption 4: Replace old ONTs Makes sense in areas with depreciated or pre-2.5 GPON ONTsOption 5: Shift to Point-to-Point GE Auto-sensing ONTs mitigate operational and technical challenges May need to reinforce feeder fibersOption 6: No migration needed, happy with 2.5 GPON 6
    • 7. Changes in Access TechnologyChange can beEvolutionary Or change can be Revolutionary 7
    • 8. You Have OptionsToday G.Vector 2020 10G GPON NG PON2 FTTN FTTC FTTP 8
    • 9. Thank You