True Mobile Broadband Paper/True... · 2015-07-29 · Copyright © 2012 Wireless City Planning inc....

1Copyright © 2012 Wireless City Planning inc. all rights reserved.

TrueMobile Broadband

Wireless City Planning

a Softbank company


TrafficExplosion

20001993 ２００７

3G2G

1973


x1K10 years

x325 years

x2/year

An inconvenient truth


“Cloud” requires huge radio capacity

Let there be light


Wemust survive

against Data Storm


What do wehave to do?


Reduce Interference

Smaller Cell


Simple Smaller Cell

Poor fringe quality

BS1 BS2

BS3


Smaller Cell +

nice Interference Cancel Technologies

BS1 BS2

BS3


Next 10 to 15 Years


LTE

All bandsGSM, UMTS


Three different approaches toLTE


1. GSM with limited WCDMA

2. Cdma / WiMAX

3. Well deployed UMTS


Skip 3GSave 3G

Investment

GSM with limited WCDMA


All in one chipare shipping

Single Eco-system

GSMUMTSLTE


Shareexistingfacilities


First application of LTE

Wireless DSLNomadic Data


Smart PhoneSmart Phone

Gradually

Ready 2012



2. Cdma / WiMAX



Eco-system issue forcdma / WiMAX

Nationwide LTEmigration rapidly

with VoLTE



2. Cdma / WiMAX



deploy LTEfor capacity

Well deployedUMTS


fortunately


Concentrated Traffic


70% > TRFgenerated at Indoor


+4G+Wi-FiNation Wide

2/3G

2/3G

Urban/Suburban


High Dense& Pinpoint



Also


4G

All bandsGSM, UMTS


Capacity

Coverage (Power)

Use Bands asa Cocktail

700-900MHz

1800/1900MHz

2100MHz

3500MHz 2600MHz

WiFi

MacroMacro

Micro

Pico


CapacityToday each band (system) has various size of cell

Macro

Macro

Micro

Pico

2G900MHz

Coverage

Macro

Macro

Micro

Pico

Femto

3G2.1GHzInt

erfere

nce


Capacity

Coverage (Power)

Dedicated Pico bandswould give us ahuge Capacity

700-900MHz

1800/1900MHz

2100MHz

3500MHz 2600MHz2300MHz

WiFi

MacroMacro

Micro

Pico


so


Offload2/3G2/3G

4G&

WiFi

4G&

WiFi

Traffic


Is this enough?


No!


x1K10 years

x325 years

x2/year

An inconvenient True


whatcould we do more

against Data Storm


TDD


Mobile Internetfits better toTDD


FDD = VoiceSymmetric

Internet fits better to TDD

Internet = TDDAsymmetric & Broadband


GuardTime

<<10%

T

FDD TDD

UL

DLGB DLUL

T

F FN:1U:D=1:1

Guard Band >>10%


5%

T

FDDB7

TDDB41

25%

70%26% 37%37%

T

F F190MHz190MHz

2x

2.5/2.6GHz


Inter Bands Guard Band >>10%

F

T

FDD DLUL DLUL

T

F

TDDUL

DL=

UL

DL

UL

DL


So, I would say…


TDDis the hope

against Data Storm


but


People ask me…


DoesTDD have a eco-system?


Yes! We are here!


Global TD-LTE Initiative (GTI) Since Feb 2011 in MWC

InitiatorsChina MobileBharti AirtelSoftbankVodafoneClearWire

32Operators

*Include several WiMAX operators.


Over

600M

200M

200M33M

and more... Subscribers1Billion


755MHz Bandwidth

TDD bandopportunities

3.7GHz 200MHz3.5GHz 200MHz2.6GHz 200MHz2.3GHz 100MHz1.9GHz 40MHz2.0GHz 15MHz


TDD ≒ FDDfor LTE

Single Eco-system

GSM

UMTS

LTE[F&T]


Also


People ask me…


Has TDD been matured?


Yes!It’s working Now!


System Launchedin Nov.1st 2011

Major30+ Cities

Tokyo, Osaka, Nagoya…


4G TDD

(20MHzBW)110Mbps110MbpsMax.


CommercialDevice

Feb 2012

MiFi4G+3G


20122012

NW Supports Smart Phone


AcceleratingDeployments

~2000eNB/Month


Most of TRFCoverage

20132013


Only One Small Concern is


Launch beforeChina


OurPotentials


150BS/km2150BS/km2

160k Micro cell Sitesare available for 4G

160k Micro cell Sitesare available for 4G


More antenna elements

More antenna elements

More speedMore speed

N MIMO : N elements


Which one is easier to havemore antenna elements?


Cloud RAN

BBU

Distributed RRH@sites

Cloud BBU @LXC office

Dark Fiber


Cloud RAN

Which one is

much intelligent?

Distributed RAN


Cloud RAN

Which one is

lower power consumption?

Distributed RAN


Cloud RANw/pooling BBU

Which one is

more robust?

Distributed RAN

N+1


Cloud RANThe best performance for Mobile BB


but


Dark Fiberdoes not exist everywhere!

with reasonable price

Except for Japan


What could we dow/o centralized solution?


TDD


Diversity of opinionIndependence

Decentralization Aggregation


Null SteeringBeam Forming

We should know the Power of TDD’s FrequencyReciprocity


Using reciprocityTDD => Autonomous

nice performance without Dark Fiber


We would say


True Mobile

Broadband

True Mobile

Broadband

We providesWe provides

True Mobile Broadband Paper/True... · 2015-07-29 · Copyright © 2012 Wireless City Planning inc....

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Transcript of True Mobile Broadband Paper/True... · 2015-07-29 · Copyright © 2012 Wireless City Planning inc....