Next-Gen Access Technologies: PON and DSL
9
Next Generation Access Technologies Practical Considerations AFTER
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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. Which approaches are practical, necessary and beneficial and what factors determine the best path to take?
Transcript of Next-Gen Access Technologies: PON and DSL
Next Generation Access TechnologiesPractical Considerations
AFTER
2
What’s Deployed Today?
1 3 5 7 9 11 13 15 17 19
100
1000
45
24
75
Do
wn
str
ea
m S
pe
ed
(m
bp
s)
Distance (kft)
ADSL2+
VDSL2Bonded ADSL2+
2.5 GPON (100-200 Mbps effective)
EFM Ethernet 100Mbps
EFM Ethernet 1Gbps
EPON
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A Peek at New Technologies
Technology Projected BW Availability Promised Benefit
G.Vector 80-100 Mbps 2011 Improvements from reduction in crosstalk interference
Super MIMO 100 to 300 Mbps (Vendor specific)
TBD Increased bonded link capacity via ‘phantom’ pair
10G GPON / GEPON
Splitter dependent
2013 and beyond
Backwards compatible with existing PONs
NG-PON2 40+ Gbps aggregate
2015 and beyond???
Much higher bandwidth per subscriber
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Considerations – Infrastructure
Other Infrastructure Considerations
RF vs IPTV
Spectral management – DSL and PONs
Aerial vs buried, right-of-ways, pole vs pad vs retrofit
CO / RT OSPCO / RT OSPCO / RT OSP
FTTC Point to Multipoint
Point to Point
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Considerations – Vectoring
Vectoring 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
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2.5 GPON Migration Options
Option 1: 10G GPON Coexistence
2.5 GPON ONTs designed anticipating 10G GPON standard
Option 2: Deploy blocking filters on existing ONTs
Labor and truck roll intensive, makes sense in limited volumes
Option 3: Utilize 10G only on new PONs
Easiest approach from an operational and cost point of view
Option 4: Replace old ONTs
Makes sense in areas with depreciated or pre-2.5 GPON ONTs
Option 5: Shift to Point-to-Point GE
Auto-sensing ONTs mitigate operational and technical challenges
May need to reinforce feeder fibers
Option 6: No migration needed, happy with 2.5 GPON
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Changes in Access Technology
Change can be Evolutionary
Or change can be Revolutionary
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You Have Options
Today 2020G.Vector
10G GPON NG PON2
FTTN FTTC FTTP
Thank You
