Architecture and transport for mobile broadband backhaul · In CAPITALS Slide subtitle Architecture...

In CAPITALS

Slide subtitle

Architecture and transport for mobile broadband backhaul

Kåre Gustafsson Ericsson Research

2010-11-04

Slide title

30 pt

Text

18 pt

5

16 pt

Public | © Ericsson AB 2010 | 2010-11-04 |

outline

› Technology and market drivers

› Link technologies

› Backhauling of Heterogeneous Networks

› Main remote connection technology

› Sync issues in mobile broadband backhauling

› Summary

Slide title

30 pt

Text

18 pt

5

16 pt


Introduction

Architectural view of scope

MetroEthernet

BTS

3G Node B

2G BTS

RBS Site

Site

Infrastr. Microwave

Fiber

Copper

Switch/core site

Site infrastructure

Mobile Backhaul

SIU

BTS

LTE eNodeB

BSC

RNC

CPG

Reference network

MME

Radio Transport Radio

Slide title

30 pt

Text

18 pt

5

16 pt


Radio Drivers for transport network modernization

Subscription forecast

0.001

0.01

0.1

1

10

100

1,000

10,000

2013200920052001199719931989

Mill

ion

s

GSM

WCDMA

LTE

Subscription forecast

0.001

0.01

0.1

1

10

100

1,000

10,000

2013200920052001199719931989

Mill

ion

s

GSM

WCDMA

LTE

GSMGSM

WCDMAWCDMA

LTE

Slide title

30 pt

Text

18 pt

5

16 pt


The Beginning of Mobile Broadband

Voice

HSPA

0

1

2

3

4

5

6

7

se

p 0

7

no

v 0

7

jan

08

ma

r 08

ma

j 08

jul 0

8

se

p 0

8

no

v 0

8

jan

09

ma

r 09

ma

j 09

jul 0

9

se

p 0

9

no

v 0

9

Date

Tra

ffic

per

RN

C, G

row

th f

acto

r

Speech traffic DCH Packet traffic HS Packet traffic

CS64 traffic Others traffic Total trafficMobile Broadband will require packet technologies

Both in Radio and in Mobile Backhaul

Mobile Broadband will require packet technologies

Both in Radio and in Mobile BackhaulMobile Broadband will require packet technologies

Both in Radio and in Backhaul

Slide title

30 pt

Text

18 pt

5

16 pt


The Backhaul Situation

› Globally

– 48% micro wave

– 37 % fiber

– 15 % Copper

› Large regional variations

– Fiber common in China, Korea, Japan

– Microwave dominant in India and strong in Europe

– Copper dominant in US

› Variations depending on operator type

– Incumbent has own backhaul and „access to L1‟ control of delay

– Non-incumbent rents backhaul and has „access to L2‟ less control

› Microwave Ethernet and Fiber dominate new macro installations

Global L1 Backhaul Technology Forecast

Microwave

Copper

Fiber

0%

20%

40%

60%

80%

100%

End 2007 End 2008 End 2009 End 2010 End 2011 End 2012 End 2013

Perc

en

tag

e o

f C

ell

Sit

es

Source: heavy reading

Slide title

30 pt

Text

18 pt

5

16 pt


TRANSFORMATION SCENARIOS –towards packet transport

Co

nn

ectio

ns

Time

Ethernet

transport

TDM

Ethernet introduced to new sites

ATM phase out TDM phase out

TDM

transport

Packet only

Native Ethernet,

CES(TDM)

Hybrid

Native TDM,

Native Ethernet

TDM only

PDH, SDH,

NG-SDH,

Ethernet/PDH

TDM

transport

Slide title

30 pt

Text

18 pt

5

16 pt


outline





› Sync in mobile broadband backhauling

› Summary

Slide title

30 pt

Text

18 pt

5

16 pt


High capacity microwave links

› 1 Gbps, 2,5 Gbps and higher can be reached

› Future-proof microwave solution for LTE and LTE-Advanced

› Optical Ethernet interface

› 70/80 GHz channel (E-band)

› FDD RF interface

› Live Gb test link has been running for 1,5 years

Microwave capacity will not be a bottleneck

Slide title

30 pt

Text

18 pt

5

16 pt


Bonded and vectorized VDSL2

Bitrate on Line 1 Bonding rate

200 400 600 800 1000 1200250

300

350

400

450

500

550

Reach (m)

Bitra

te M

bit/s

300 400 500 600 700 800 900 1000 1100 120030

40

50

60

70

80

90

100

110

120

Reach (m)

Bitr

ate

Mbi

t/s

Vectoring

No Vectoring

VDSL2 can reach 500 Mbps over 600 m using bonding

and vectoring technologies

Existing Cu infrastructure can handle high capacities

Slide title

30 pt

Text

18 pt

5

16 pt


outline





› Sync in mobile broadband backhauling

› Summary

Slide title

30 pt

Text

18 pt

5

16 pt


When to Do What?

Enhanced macro site› Most straightforward - first step

› Uniform capacity and coverage

› Limited potential

More dense macro layer› Long term solution for uniform

coverage and capacity enhancements

› Limited by site availability

Additional low-power nodes› Especially for non-uniform traffic demand

› Avoids need for additional macro sites

Higher

data rates

Higher area capacity

Very high

data ratesVery high capacity

Slide title

30 pt

Text

18 pt

5

16 pt


Heterogeneous networks – Different approaches

Conventional Pico RBS

• Main part of processing locally at “pico” site

• Conventional backhaul (copper, fiber, -

wave, …)

Relay• Main part of processing locally at “pico”

site

• Backhaul using cellular radio-

access/spectrum

• Backhaul consumes cellular spectrum

RRU

• Mainly radio at “pico” site, main part of

processing centralized (e.g. at macro site)

• High-speed fiber-based backhaul

Pico processing

Slide title

30 pt

Text

18 pt

5

16 pt


Wireless backhaul?

Densification of radio networks will happen ~2015 and beyond.

› Many bottlenecks in MBB networks

– cell edge and uplink capacity

– indoor coverage

› Heterogenous radio networks

– Initial deployment of macro for coverage

– Pico and relay basestations for incremental

capacity growth and extended coverage

› Order of 100 meters inter-site distances

› Fast roll-out of pico relays, with later roll-out of dedicated

transport to the highly loaded relays.

– Hierarchical radio structures to handle inter-cell interference and

resource management

› Low delay required on X2, and time/phase sync

Pico cell Y

Pico cell W

Pico cell Z

Pico cell X

Macro cell

Slide title

30 pt

Text

18 pt

5

16 pt


outline






› Summary

Slide title

30 pt

Text

18 pt

5

16 pt


Use case for main-remote connectionover GPON infrastructure

FTTH

Central

Node

λ converter

CWDM MUX/ DEMUX

MU

Ethernet switch

Add dropAdd drop

λ converter

MUX/ DEMUX

RR

U

RR

U

RR

U

RR

U

Ethernet switch

Add dropAdd drop

dropdrop

λ converter

MUX/ DEMUX

RR

U

RR

U

RR

U

GPON

Node

λ converter

CWDM MUX/ DEMUX

MU

Central Office

LT

E

Main-remote solution

Optical Fiber carrying

GPON and M-R traffic

Add/drop traffic to/from RRU:s

1…4

BBA

BBA

3 4

2

1

{1…4; BBA}

Slide title

30 pt

Text

18 pt

5

16 pt


Main-remote connectionsover gPON Infrastructure

Converged Access Network

Distributed Split

1:41:8

Iub

1550 1270

RRU-W

1490

CN

1310

Router

WBF-1

1270

1550

RBS

DSLAM

VDSL2

CPE

MU

WDM1

10G ONT

10G OLT

10G ONT

1550

1270

1490

1310

1490149014901550

1270 1310

Video

ServerVideo

Server

OLTMU

High speed fixed & mobile access

infrastructure convergence using

GPON to support:

–Fixed residential and business FTTH

users

–Bonded VDSL2 over GPON

connections

–CPRI MU-RRU links for RBSs

RRU

Slide title

30 pt

Text

18 pt

5

16 pt


outline






› Summary

Slide title

30 pt

Text

18 pt

5

16 pt


Importance of synchronization in Mobile Backhaul

Synchronization (frequency, time-phase or both) is a key aspect in mobile broadband backhaul networks to support:

– the services carried over the packet network (including proper interworking with legacy TDM networks)

– the end-application operations, such as radio base stations.

MetroEthernet

BTS

3G Node B

2G BTS

RBS Site

Site

Infrastr. Microwave

Fiber

Copper

Switch/core site

Site infrastructure

Mobile Backhaul

SIU

BTS

LTE eNodeB

BSC

RNC

CPG

Reference network

MME


MetroEthernet

BTS

3G Node B

2G BTS

RBS Site

Site

Infrastr. Microwave

Fiber

Copper

Switch/core site

Site infrastructure

Mobile Backhaul

SIUSIU

BTS

LTE eNodeB

BSCBSC

RNCRNC

CPGCPG

Reference network

MMEMME


Slide title

30 pt

Text

18 pt

5

16 pt


Sync Technology Highlights

SyncE to become an established technology also in Mobile backhaul

(frequency sync only, but may be used to aid IEEE1588 for time

delivery).

Some limitations in multi-operator scenarios

Increased need to deliver accurate phase-time synchronization

PTP (IEEE1588) being specified for Telecom

Frequency Telecom Profile just released; time sync profile being

discussed

Access technologies are challenging environments to deliver

accurate time due to intrinsic asymmetry (e.g. GPON ; xDSL)

Sync solutions for CoMP, CPRI, wireless backhaul in heterogeneous

NW requires careful analysis

Scheduling

coordination

Coordination

Joint transmission

http://www.sonyericsson.com/spg.jsp?cc=gb&lc=en&ver=4000&template=pp1_loader&php=php1_10238&zone=pp&lm=pp1&pid=10238



Slide title

30 pt

Text

18 pt

5

16 pt


Summary - conclusions

With the rollout of Long Term Evolution the capacity of the radio access

network backhaul needs to be upgraded to 100–150 Mb/s. Next generation

mobile networks, such as LTE Release 10, will increase the requirement for

backhaul capacity to gigabits per second.

The need for increased capacity and decreased cost per transported bit

drives packet-based mobile backhaul capacity boosts over microwave,

copper and fiber. Backhaul link technologies will not be a bottleneck for

Mobile Broadband Traffic.

Variations of backhaul deployment depending on operator type

Converged versus mobile only operator

Possibility to use existing infrastructure (Fiber and Copper)

Microwave Ethernet and Fiber will dominate new backhaul installations

Proper sync solutions are one key aspect for a succesfull deployment of next

generation mobile backhaul networks

Architecture and transport for mobile broadband backhaul · In CAPITALS Slide subtitle Architecture...

Documents

Transcript of Architecture and transport for mobile broadband backhaul · In CAPITALS Slide subtitle Architecture...