Check out the slide set that Klaus Grobe and Jörg-Peter Elbers presented in Berlin at the 8th Anuual ITG Fachkonferenz Breitbandversorgung

1. 8. ITG Fachkonferenz Breitbandversorgung in Deutschland, Berlin, April 2014
Dres. Klaus Grobe and Jörg-Peter Elbers, ADVA Optical Networking SE, Advanced Technology
Access and Backhaul Consolidation with NG-PON2

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Content
• NG-PON2 Variants
• NG-PON2 Applications
• Conclusion

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NG-PON2 Variants

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NG-PON2 Main Variants
• Shared vs. Expanded Spectrum (co-existence w/ legacy PON generations)
• TWDM vs. PtP WDM
• 4, 8, more wavelength pairs
• TWDM 2G5 vs. 10G (US and/or DS), PtP WDM w/ 1G, 2G5, 3G, 5G, 6G, 10G, …
• Power split (preference) vs. filtered ODN
• N1 vs. N2 vs. E1 (vs. E2) reach options
• More (DFB vs. DBR lasers, cyclic AWG vs. TFF, …)
Loss N1 N2 E1 E2
Min. 14 dB 16 dB 18 dB 20 dB
Max. 29 dB 31 dB 33 dB 35dB

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Shared-Spectrum NG-PON2
• Co-existence of TWDM and PtP WDM (shared spectrum)
• Potential co-existence w/ G-PON, RF, XG-PON1 (brownfield and greenfield)
• Up to 8 wavelength pairs for TWDM (8  32…64 users)
• Up to 16 PtP WDM wavelength pairs possible (best practice could be 8)
• Total split 256…512 will most likely require Reach Extender (27…31 dB PS IL)
…
PtP ONU x
…
…
TWDM OLT Port 1
TWDM OLT Port 4
PtP WDM OLT 1
PtP WDM OLT N
TWDM ONU n
…
1:N
WMWM
CoexistenceElement
Power
Splitter

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Expanded-Spectrum PtP WDM
• No co-existence w/ TWDM, G-PON, XG-PON1, and/or RF overlay
• Considered greenfield only
• Overlap with ITU-T SG15-Q.6 G.metro pWDM / WDM-PON
• Will most likely have 40…48 WDM channel pairs
• Power-split or filtered ODN (filters shown)
• Full-band tunables lasers
WM
PtP WDM OLT 1
…
PtP WDM OLT N
…
WM
PtP ONU 1
PtP ONU N
Filter

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NG-PON2 Applications

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NG-PON2 Applications
• Residential access – shared, TWDM
• VDSL2 (FTTCab) / G.fast (FTTdp) backhaul – TWDM or PtP
• Broadband business access (shared or dedicated) – TWDM or PtP
• Mobile backhaul (MBH, D-RAN) – TWDM, PtP
• Fronthaul (MFH, C-RAN) – dedicated, PtP
• Hybrid Fiber/Coax (HFC, 2nd-ary Headend backhaul) – TWDM, PtP

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Radio Access Networking
BBU(H) Base Band Unit (Hotel)
CPRI Common Public Radio Interface
C-RAN Centralized (BBUH), Co-operative (multi-point radio), Clean (systems), and Cloud (infrastructure)
RRH Remote Radio Head
• Fronthaul will be based on fiber almost exclusively
• Fiber roll-out similar to FTTB, FTTCab, FTTdp, depending on cell size
• More MFH may mean less MBH, depending on network consolidation
C-RAN, a.k.a. Fronthaul
BBUH
BBU
BBU RRH
Backhaul
CPRI
RRH
RRH
S1
ONU
Evolved
Packet
Core
WM
OLT
WM

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Wireline Backhaul
DPU : Distribution Point Unit
• In order to increase copper bandwidth, fiber must get to the distribution points
• The next wave of wireline backhaul
• NG-PON2 supports all wireline backhaul bandwidths and distances
Local
Exchange
New CO
AGS
DPU
Cabinet
ONU
G.fast
<250 m
ADSL <7 km
VDSL <1.5 km
CP
WM
CP
CP
OLT

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HFC, incl. Backhaul
• In order to increase copper bandwidth, smaller clusters and more fibers are needed
• This increases the Fiber part in HFC
• NG-PON2 may support this, however, there was almost no input from cable operators
to its standardization
CMTS : (Modular) Cable Modem Termination System
Optical
Node
2nd-ary Headend
Opt.
TRX
HFC Fiber CoaxBackhaul
Core
Master Headend
WM
CMTS
OLT
OLT
ONU

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NG-PON2 Applications Consolidation
ILEC Tier-2 Tier-3 Mob. Op. Infra. Prov. Web2.0 HFC Op.
Fronthaul XXX XXX X
Mobile Backhaul XX XX XXXX X
FTTdp Backhaul XXX X
HFC X XXXX
Business Access XX XX XXXX X XX
Residential Access X XX XXX XXXX
(X) TWDM, (X) PtP WDM (shared), (X) PtP WDM (full), (X) Active point-to-point
Note: Font size (X, X, X, X) indicates relative likelihood / relevance

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Conclusion

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Conclusion
• NG-PON2 can come in many different variants
• It can support various access, backhaul and fronthaul applications,
including the network / active-site consolidation for these applications –
Structural Network Convergence (ref., e.g., EU FP7 IP COMBO)
• It can be used by any type of operator for the respective applications

15. KGrobe@ADVAoptical.com
Thank You
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