Session: Mo.3.F.1 Heterogeneous access fiber … access fiber networks enabled by ... UMTS GSM/EDGE...

1 ECOC 2013-09-23, Session: Mo.3.F.1

Ronald Heron – FTTH Technologies, CTO team, Alcatel-Lucent, Ottawa, Canada

September 23rd, 2013

Session: Mo.3.F.1

Heterogeneous access fiber networks enabled by multi-wavelength PONs and virtualization

2 ECOC 2013-09-23, Session: Mo.3.F.1

Abstract

• Once devoted solely to FTTH,

access fiber must increasingly support enterprises, G.FAST nodes, multi-operator uses and mobile backhaul/fronthaul for small cells. These heterogeneous networks will be supported in an operationally efficient way by multi-wavelength PONs and increasing virtualization.

3 ECOC 2013-09-23, Session: Mo.3.F.1

Fiber & Mobile Trends and Drivers

• Fiber trends:

Subs growing

BW growing …but growing slower than BW provided

Fiber Applications:

FTTH, FTTdp, Enterprise, Multi-operator, Mobile

• Mobile trends

More subs, more devices

more BW, more nodes

large cells & metro cells

CPRI BH / mobile Fronthaul

Virtualization / Compression

…fiber to the everything …fiber meets mobile

PON Aggregation market (annual sales)

EPON

GPON

10GEPON

XGPON

0

2

4

6

8

10

12

14

16

HSPA

UMTS

GSM/EDGE

GSM/GPRS

GSM

Population

Households

Average of 4.3 mobile

subscriptions per household!!!

Source:

Pyramid Research – Mar-12

Mobile growth

Source: Infonetics 2013

4 ECOC 2013-09-23, Session: Mo.3.F.1

Outline

• Fiber and mobile trends

• Fiber technology evolution and economics

• Applications

FTTH

FTTdp

Enterprise

Multi-operator

Mobile backhaul & fronthaul

• Summary and Conclusions

5 ECOC 2013-09-23, Session: Mo.3.F.1

NGPON2

Post-NGPON2

Fiber Technology Evolution in 4 Dimensions

TDM

WDM

GPON

XGPON1

Bit interleaved

40G PON

Bit internleaved

N * 40GPON

Existing 2013

TWDM GPON?

1G

TWDM

Coloured P2P – 1G, 10G

P2P

10G

2016 2020 2013 2016 2020

NGPON1

NGPON2 4-8l

Colourless WDM-PON

NGPON2 1l

Improvements in

tuning technology and

parallel optics

Improvements in

tuning technology and

parallel optics

parallel optics Improved sensitivity,

optical budget and

power consumption

6 ECOC 2013-09-23, Session: Mo.3.F.1

Fiber Technology Overview 1/3: TDM PON

• EPON, GPON Can reduce split to increase bit rate/sub

lowest cost solution and meets foreseeable BW growth

• XGPON G.987 - 10G/2.5G

can coexist with GPON

high cost, very low projected volumes

• 10GEPON IEEE 802 - 10G/1G, 10G/10G

can coexist with EPON & 10/10GEPON can coexist with GPON

high cost, low projected volumes

• NGPON2-1l-10G G.989.2: 10G/10G, 10G/2.5G, 2.5G/2.5G

can coexist with GPON, EPON & XGPON

too early to project volumes, high costs, perhaps it supplants XGPON.

GPON

GPON

GPON

GPON

G ONT 4 x 2.5G

GPON

XGPON

G ONT

XG ONT

2.5G + 10G

1580nm

1260nm

GPON

10GEPON

G ONT

10G ONT 2.5G + 10G

1580nm

1260nm

Coexistence possible with 10/10G

GPON 2.5 + 1 x 10G

NGPON2 l1

NG ONT

G ONT

1600nm

1530nm

GPON

XGPON

10GEPON

NGPON2-1l

7 ECOC 2013-09-23, Session: Mo.3.F.1

Fiber Technology Overview 2/3: TWDM-PON

• NGPON2 – 4-8l – 40G+

G.989.2: Nx10G/10G, Nx10G/2.5G, Nx2.5G/2.5G

Coexists with GPON, EPON, XGPON

Limited use cases, too early to project volumes, high costs

• GPON+ – 4-8l -10G+

Apply NGPON2 (G. 989.2) l mgmnt to GPON G.983.2 MAC

Nx2.5G/1.25G

use GPON band (other bands possible)

GPON+ could become the new GPON Can start with one lambda and evolve to more

Could it play a role in the future?

GPON

2.5G + 4 x 10G NG ONT

G ONT

NGPON2

G+ ONT 4l

GPON+

WM

4 x 2.5G

GPON+

NGPON2

8 ECOC 2013-09-23, Session: Mo.3.F.1

Fiber Technology Overview 3/3: WDM-PON & P2P

• P2P l overlay

A few coloured wavelengths are overlaid to serve a special application (e.g. mobile node)

Could be 1G or 10G

• WDM-PON

Routed OSP vs Tuned ONTs

Objective to have >32 x 1G

10G more difficult

Technical challenges

low cost tunable ONTs (Tx & Rx)

Parallel optics at OLT

• P2P

Simple P2P fiber links

1G or 10G according to the need

Technical challenge: Density - parallel optics

S ONT

32 x 1GE

x 10G WDM

PON

WDM-PON Tuned ONTs

10G

ONT

32 x 1GE

x WDM PON

10G 1GE

1GE

1GE

1GE ONT

x . . .

36 x 1GE

WDM-PON Routed OSP

GPON

2.5G + n x P2P GE GE ONT

G ONT

GE OLT GE OLT

GE ONT

P2P l overlay

P2P

9 ECOC 2013-09-23, Session: Mo.3.F.1

2.5G 10G 40G-ready

Cost Comparison

4km

•1:32 split

•Excludes civil works and OSP

construction

10 ECOC 2013-09-23, Session: Mo.3.F.1

Technical enablers

• Fiber enablers Tunable Tx for ONT

Heat-only DFB laser with cyclic AWG

TEC-based wavelength control

InP or Silicon optics tunable transmitter

Tunable Rx for ONT Tunable Bragg filter

Component for GPON+ since <2010

NGPON2 in progress

InP or Silicon-optics tunable filter

DWDM Tx/Rx for OLT

P2P, TWDM, WDM Arrays

Higher speed TDM and increased optical budgets SOA, EDFA

Coexistence elements

• Copper enablers Vectoring

Bonding

G.FAST

• Mobile enablers CPRI backhaul

Compression

Virtualization

11 ECOC 2013-09-23, Session: Mo.3.F.1

Outline



• Applications

FTTH

FTTdp

Enterprise

Multi-operator



12 ECOC 2013-09-23, Session: Mo.3.F.1

FTTH Application 1/2

• Bit rate projection

Announced service rates are increasing

Verizon vs Comcast: 100Mbs, 300, 305, 500, 505Mbps…

Chatanooga, Google fiber in KC, Gigabit Squared, fiber communities: 1Gbps

Actual continuous BW consumed is much lower (Even with aggressive assumptions)

<50Mbps by 2025

Requires ability to burst briefly at higher rates

0

200

400

600

800

1000

1200

2012 2014 2016 2018 2020 2022 2024 2026

Agg

rega

ted

de

man

d (

Mb

/s)

99%-ile aggregated streaming video demand

32 subs

16 subs

GPON is expected to be able to meet FTTH bandwidth demand far into the future

Assumes continuous increase in quality of HD, annual improvement in

compression, annual upgrade of consumer’s CPE, multiple CPE/home.

13 ECOC 2013-09-23, Session: Mo.3.F.1

FTTH Application 2/2

• Technical solutions to accommodate BW growth

GPON reduced-split

No ONT change-out

Requires splitter change at FDC, plant rework for spliced network.

Can pre-install CO splitter in cascade, then remove

XGPON or 10GEPON overlay

ONT change-out

No urgent need for residential

NGPON2

Too much BW for residential for foreseeable future

GPON+

Latent capability to turn all ONTs into higher speed

Soft provisioning of BW without truck rolls

Could be an interesting solution

WDM-PON – more technology than is needed for res

P2P – an option for short loops

GPON

GPON

GPON

GPON

G ONT 4 x 2.5G

GPON

G+ ONT 4l

GPON+

WM

4 x 2.5G

GPON+ G+ ONT GPON

Defer purchase of DWM laser

No WM Tuning capability in

ONT

14 ECOC 2013-09-23, Session: Mo.3.F.1

FTTdp 1/2

• Copper enablers

Bonding

Vectoring

• Sustained BW consumption for copper fed homes is no different from fiber fed homes

GPON rates are adequate for aggregation

Downstream 4-pair vectored

1-pair vectored

2-pair vectored

4-pair non-vectored

1-pair non-vectored

2-pair non-vectored 0

500

1000

1500

2000

2500

3000

3500

4000

16 32 64 128 256

Agg

rega

ted

dem

and

(Mb

/s)

No. of aggregated subscribers

99%-ile aggregated demand

sustained + 1G burst headroom

Year 2020

Year 2013

–Average # of streams per sub (λ): 1.25

–Acceptable HAS adaptation: 100%

–Percent of HD content is 3D 5%

–# MC channels offered: 500

–Zipf exponent -0.75

G.Fast – 1Gbps symmetrical over 200m

8 nodes with 16 ports

consume <2.5G by 2020

Expect FTTdp to be complementary to FTTH

15 ECOC 2013-09-23, Session: Mo.3.F.1

FTTdp 2/2

• Techical solutions

GPON reduced split

Shared or dedicated PONs

Completely adequate for aggregation

XGPON,10GEPON, NGPON2-1l overlay

A valid next technology for aggregating nodes

NGPON2 More bandwidth than needed

GPON+

Latent capability to turn GPON aggregation into 4-8 x speed

No truck role would be needed

Interesting option

WDM-PON - more BW than is needed

P2P – is always a backup option

GPON

GPON

GPON

GPON

G ONT 4 x 2.5G

GPON

G+ ONT 4l

GPON+

WM

4 x 2.5G

GPON+ G+ ONT GPON Defer

purchase of DWM laser

No WM

Tuning capability in

dp ONT

GPON

XGPON

G ONT

XG ONT

2.5G + 10G

1580nm

1260nm

XGPON/10GEPON

16 ECOC 2013-09-23, Session: Mo.3.F.1

Enterprise 1/2

• Characteristics

Different organizations

Often want dedicated system or dedicated l

Customers location

Clustered in business area enterprise-only solutions

…or distributed throughout residential areas integrated enterprise/residential solutions

Move BW than needed for res – dedicated BW

100G,

<=1G,

<=10G

17 ECOC 2013-09-23, Session: Mo.3.F.1

Enterprise 2/2 • Technical Solutions (for scattered enterprise/res areas)

Dedicated GPON with reduced split

Ok initially but need more (esp for 10G service)

XGPON, 10GEPON, NGPON2-1l

Dedicated enterprise-only PON

…or overlay on residential GPON

NGPON2

Only needed for highly clustered enterprise areas

GPON+

Would require all residential customer ONTs to be already GPON+

Does not address 10G service

WDM

Only needed for highly clustered enterprise areas

Must support 1G and 10G rates

P2P l overlay

Meets specific customer needs

PP

Always a fall back option – requires Fiber Distribution Cabinet

GPON

XGPON

G ONT

XG ONT

2.5G + 10G

1580nm

1260nm

XGPON/10GEPON/NGPON2-1l

GPON

2.5G + n x P2P GE GE ONT

G ONT

GE OLT GE OLT

GE ONT

P2P l overlay

18 ECOC 2013-09-23, Session: Mo.3.F.1

Multi-operator 1/4

• Characteristics

Different operators

-> dedicated system or dedicated ls

Various levels of sharing

Share in-building wiring but competing OSP infrastructure

Share fiber infrastructure

Churn means truck rolls

Share wavelengths

Differentiation but avoided truck rolls

Bit stream services

Some differentiation may be possible

Access virtualization could allow some optimizatio

19 ECOC 2013-09-23, Session: Mo.3.F.1

Multi-operator 2/4

• Technical solutions

GPON w/ fiber infrastructure sharing

Optimal for residential applications

But requires truck rolls for churn


more than what is needed for rez

NGPON2

Allows wavelength sharing but is more BW than needed

GPON+

Allows wavelength sharing – zero touch provisioning paradigm

would be a very nice fit

WDM

Would provide wavelength sharing

Cost challenges

P2P – is used successfully where network built expressly with short loops

G+ ONT 4l

GPON+

WM

4 x 2.5G

Op A

Op B

Op C

Op D

GPON

GPON

GPON

GPON

G ONT 4 x 2.5G GPON

Op A Op B Op C Op D

GPON+

20 ECOC 2013-09-23, Session: Mo.3.F.1

COPYRIGHT © 2013 ALCATEL-LUCENT. ALL RIGHTS RESERVED. ALCATEL-LUCENT — INTERNAL PROPRIETARY — USE PURSUANT TO COMPANY INSTRUCTION

20

Multi-Operator, 3/4 Optimization Choices: Splitters in Fiber Distribution Cabinet or Hard-Wired

OLT port

OLT port

OLT port

OLT port

Splitters are

connectorized

Splitters are spliced

Connectorized pay-as-you-grow • Splitters are in flexibility cabinet

• Splitters filled up and OLT ports lit up one at a time as

subscribers are turned up

• High cost of fiber distribution cabinet

• Drives higher utilization of OLT ports

• Numerous failures related to connectors

Hard-wired Day-1 deployment • All HHP are hard-wired to splitters and corresponding

OLT ports, on day 1

• High OLT costs on Day 1

• Take rate determines OLT utilization rate

• Fiber distribution cabinet cost eliminated

• Enables zero-touch OSP – lower opex

• No connector problems

Cabinet

Some data suggests that a high proportion of field problems are related to connectors in FDCs

No cabinet

21 ECOC 2013-09-23, Session: Mo.3.F.1

Multi-operator, 4/4

• Virtualization of the access network could further enable multiple operators to share the active components while providing differentiation

OLT

Flow Table

Flow Table

FTTdp ONT

Flow Table

Flow Table

OpenFlow Controller

Edge Router

MDU ONT

Flow Table

Flow Table

RG

RG can also be an OpenFlow Device

OpenFlow Configuration

Point

Operates on a timescale of a flow.

Add, update and deletes flow entries in flow tables. Could be

integrated into OLT

Operates on a long timescale. Configuration

of ports and queues. Discovery of OF Logical

Switch capabilities,

configuration of tunnels

OF-CONFIG OpenFlow

Switch and topology discovery, capability

configuration for further study

RG

22 ECOC 2013-09-23, Session: Mo.3.F.1

Source: Bell Labs 2012

EXPLODING BANDWIDTH

VIDEO AND WIFI DRIVING FIXED BROADBAND NETWORK CONSUMPTION

By 2014:

70% of internet traffic will be

VIDEO

By 2016:

85% of wireless communications

will rely on FIXED networks

Mobile Backhaul / Fronthaul, 1/5

23 ECOC 2013-09-23, Session: Mo.3.F.1

Enterprise Small Celll

Home Small Cell

Metro Cell

Enterprise Small Cell

WiFi Hotspots

Distributed Antenna

3G/4G Macro 3G/4G Macro

Wi-Fi

A HETEROGENEOUS NETWORK PUTS NEW CHALLENGES ON THE BACKHAUL NETWORK

Mobile Backhaul / Fronthaul, 2/5 In FTTH areas and non-FTTH areas

Macro cells and metro cells

Different organizations from FTTH, different companies

-> dedicated system or dedicated l

Backhaul vs Fronthaul

24 ECOC 2013-09-23, Session: Mo.3.F.1

Need fiber-rich backhaul or very high speed multiplexed link.

Macro Cell

Or

Micro Cell

Local or Regional

Site

(BBU Hotel)


• Fronthaul: CPRI links from mobile radio heads to centralized Base Band Units

Consolidates the BBU digital processing in one spot

Deployment savings, smaller footprint at the radio (LightRadio)

All of the intelligence is in the large central processing cluster

possibility of virtualization and sharing of resources at different peak hours

Traffic characteristics are different from most access traffic

High sustained bandwidth = 1-10Gbps 300Mbps – 3Mbps with compression

Low latency (round trip) = <300us

24 Backhaul is much more challenging due to very high bit rates (>>100Mbps)

25 ECOC 2013-09-23, Session: Mo.3.F.1

Mobile Backhaul / Fronthaul, 4/5 • Addressing the BW and latency challenge

Bandwidth Requirement

= 1-10Gbps

DS

US

DS

US

10Gbps 2.5 or 10Gbps 1 or 10Gbps 1 or 10Gbps

Latency Requirement

= < 0.3 ms

Typical OLT for Access

•Ethernet switching, packet inspection, etc.

0.2ms – 1ms

0.2ms – 1ms

0.2ms – 1ms

0.2ms – 1ms

Fiber Access

•Speed of light (for 20km)

•Forwarding for CBR

•FEC Coding and decoding

•Ranging

0.1ms

-

0.002ms

-

0.1ms

0.05ms

0.002ms

0.2 ms

0.1ms

-

0.002ms

-

0.1ms

-

0.002ms

-

Solution: By-pass the OLT and terminate directly on BBU Hotel

Solution - if needed: Eliminate delay by setting up ranging at time of provisioning

BW is not an issue.

Latency can be addressed with ALL technologies by terminating directly on BBU Hotel

P2P l overlay, WDM-PON, P2P TDM PON / TWDM-PON

26 ECOC 2013-09-23, Session: Mo.3.F.1


• FH Technical solutions


Sufficient BW for most applications, can be overlaid on GPON

small cells

mid-sized macro cells with passive distribution directly to radio head

NGPON2

Well suited for macro cells - eliminates active aggregator

Also good for distributed metro cells

GPON+ -not enough

WDM

Macro node - could serve individual radio heads without active aggregation

Scattered nodes - would require FDC in res area to separate GPON subs from mobile

P2P overlay ls over GPON

Good way to leverage FTTH network

P2P – default solution.

Good for macro cells but requires active aggregation node

Wasteful for distributed metro-cells.

OLT

BBU Hotel

l1, l2, l3, l4

splitter TWDM-PON

l1

Cell site

WDM

BBU Hotel

XGPON

XGPON l1

Cell site

GPON

GPON

XGPON

NGPON2

OLT

27 ECOC 2013-09-23, Session: Mo.3.F.1

Outline



• Applications

FTTH

FTTdp

Enterprise

Multi-operator



28 ECOC 2013-09-23, Session: Mo.3.F.1

Mobile fronthaul Residential MDU SOHO/SME Enterprise

P2P (limited)

FIBER TECHNOLOGIES FOR EACH APPLICATION

GPON GPON

XGPON / 10GEPON

P2P

WDM-PON

P2P

GPON

P2P

WDM-PON

XGPON / 10GEPON XGPON / 10GEPON XGPON / 10GEPON

NGPON2 NGPON2

Multi-Operator

P2P

GPON w. FDC

GPON+ GPON+ GPON+ GPON+

29 ECOC 2013-09-23, Session: Mo.3.F.1

Summary and conclusions

• The access network is indeed becoming more heterogeneous, with multiple applications being added to the traditional FTTH with GPON

• GPON has more than enough capacity for long term FTTH needs.

• GPON+ could in fact be very well suited for all applications except those that require a 10Gbps service rate (i.e. FTTH, FTTdp, SoHo, multi-operator)

• Mobile Fronthaul (CPRI backhaul), in particular, calls for special solutions.

• XGPON, 10GEPON, NGPON2-1l and NGPON2 could be well suited for MFH and high end enterprise solutions

• P2P will always have it’s place, though not necessarily optimal in all cases

• P2P l overlay and WDM-PON will find their niches, though work is needed to meet cost targets

• Continued innovation is needed, especially in tunable Tx/Rx and parallel optics

Session: Mo.3.F.1 Heterogeneous access fiber … access fiber networks enabled by ... UMTS GSM/EDGE...

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Transcript of Session: Mo.3.F.1 Heterogeneous access fiber … access fiber networks enabled by ... UMTS GSM/EDGE...