Access and Backhaul Consolidation with NG-PON2

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

© 2014 ADVA Optical Networking. All rights reserved. Confidential.2

Content

• NG-PON2 Variants

• NG-PON2 Applications

• Conclusion


NG-PON2 Variants


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


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

WM

WM

Coe

xist

ence

Ele

men

t PowerSplitter


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


NG-PON2 Applications


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


Radio Access Networking

BBU(H) Base Band Unit (Hotel)CPRI Common Public Radio InterfaceC-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

EvolvedPacketCore

WM

OLT

WM


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

LocalExchange

New CO

AGS

DPU

Cabinet

ONU

G.fast

<250 m

ADSL <7 km

VDSL <1.5 km

CP

WM

CP

CP

OLT


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

OpticalNode

2nd-ary Headend

Opt.TRX

HFC Fiber CoaxBackhaulCore

Master Headend

WM

CM

TS

OLT

OLT

ONU


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


Conclusion


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

[email protected]

Thank You

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