Mulit-technology Single RANs – System Requirements and Solutions

HUAWEI TECHNOLOGIES CO., LTD.

47pt

www.huawei.com

Mulit-technology Single

RANs – System

Requirements and

Solutions

Jena Michael Lemke, PhD

May, 9th 2008

HUAWEI TECHNOLOGIES CO., LTD. Page 2Huawei Confidential


WIMAX

38Networks

Worldwide

UMTS

86(Contracts)

No.1 in 2007

CDMA

240(Operators)

No.1

Softswitch

470M+(Subscribers)

No.1

GSM

700K+(TRXs in 2007)

Top 3

� USD 7 billion contract sales in 2007

� Commercial contracts: 86 UMTS/HSPA, 65 EVDO, and 12 WiMAX

� GSM 700K TRXs shipment in 2007, account for 21％％％％ market share

Achievements in 2007


Preface


Future Wireless Network

Vision of Service

Features of Service

Features of Future Network

Ultra-high

data rate and

low latency

Enhancing User

ExperienceUbiquity

Low cost

All IP

Network


The HSPA brought fast growth in

data services, network value has

been improved sharply.

Launch HSPA

OFDM/MIMO/AAS

IS95

CDMA2K

CDMA2K

Evolution

1995 2000 2005 2010+

~14.4kbps 144kbps 384kbps 50Mbps 100Mbps

802.16d

WiMAX

2.4GHz

WLAN

5.8GHz

WLAN

802.16e

WiMAX

GSM

WCDMA

WCDMA

Evolution

1G

(Analog)

Bandwidth Improvement : Key

techs & smaller coverage

E2E IP: IP core & IP Transmission

Service Transformation Demands Wider Bandwidth

HUAWEI TECHNOLOGIES Co., Ltd. Page 7HUAWEI Confidential

Evolution to Future Technologies

2007 201020092008

HSDPA

DL:14.4Mbps

UL: 384kbps

HSUPA

DL:14.4Mbps

UL: 5.76Mbps

HSPA+

DL: 40Mbps

UL: 10Mbps

LTE

DL: 100Mbps

UL: 50Mbps

GSM

GSM phase out?

UMTS

Spectrum

� Broadband era requires more bandwidth

� Technology neutrality within the available spectrum

� Multi-technology co-existence / multiple migration options / paths

WIMAX / LTE

>1Gbps

2015 2020

LTE + +

Performance


The Challenge(s)


Operator challenges in this evolution?

Operator

Multi-standard

vs Cost Efficiency

Growing Traffic ≠≠≠≠

Growing Income

Quality and Performance

Customer Expectations


Single RAN : Managing the challenges!

Convergence� Equipment Level

� Component Level

� Transmission Level

Advantages

� Flexible Business Plan

� Fast Deployment on

Demand

� Sharply reduced OPEX

� Outstanding Performance

� High Reliability

Single RANGSM / UMTS / HSPA / LTE

GSM Expansion

Current GSM Network

• GSM Expansion Pressure

• UMTS Roll-out Pressure

• LTE is Approaching

Backhaul

UMTS/HSPA Introduced

LTE in the coming future

Current

Disadvantages

� High CAPEX

- Buy systems separately

- Deploy systems separately

� High OPEX

- Operate systems separately

- Maintain systems separately

� Performance Down

- Bad intersystem coordination

- High intersystem interference

� Reliability Down

- Fault point & risk increasing

- Hard for trouble shooting

Core Network


Requirements for Vendors

HSPA+2009 onwards

2008

LTE2010 onwards

WiMAX 1.02007

UMB ?2009 onwards

2009 2010

WiMAX 2.0 (16m)2011+ onwards

WiMAX 1.x2009 onwards

Time to Market2007

• Clear solution & roadmap

• The same platform & all IP network architecture should be adopted all RAN technologies

Industry consensus on 4G technologies timeline to market

IP Core

WiMAX BTS

WiMAX BTS

ASN-GW

IP Core

eNodeB

eNodeB

SAE-GW


Key Radio Technologies Requirements

①①①① System to be 20MHz capable

• 2G/3G: Multi-TRX / Multi-Carrier

•16e: currently main focus on mandatory 5/10MHz, 20MHz optional

• LTE: 20MHz mandatory (+scalability)

System Requirements

• Radio Unit: wide broadband RF technologies, 20MHz support

• Baseband Unit: 20MHz processing capability

high transmission

power required

②②②② More transmission power needed: high efficiency Power Amplifier

③③③③ Advanced multiple antenna technologies for additional gain

System Gain (dB) = EIRP (dBm) –

RX Sensitivity composite (dBm) +

Antenna Configuration Gain (dB) +

Cyclic Combining Gain (dB)

advanced

antenna required

Wider channel size,

lower sensitivity


High efficient Power Amplifier

P

C

λλ λλ/4

In

OutDoherty•Up to >30% power efficiency

FF Linear RegionRF Output (dBm)

RF Input (dBm)

0 +5 +10 +15 +20

Saturation

Saturation

DPD Linear Region

A’

A

Linear characteristics of FF and DPD

DPD advantages

• Better linearity than FF

• Higher efficiency than FF

• PA determines volume, weight, power consummation which directly influence CAPEX

• Doherty & DPD PA should be adopted in initial network deployment


Advanced Multiple Antenna Technologies

4T4R MIMO-Beam Forming2T4RAntenna Configuration

4~6dB

Downlink

-

Downlink

Additional Gain Compared to

2T2R

2~4dB2~4dB

UplinkUplink

Additional Gain from 2T4R & 4T4R MIMO-BF technologies

• 2T4R and 4T4R could be the main stream for future 4G technologies

• Capability for future advanced multiple antenna technology evolution

DL: 2x2, 2x4, 4x2, 4x4 MIMOUL: 1x2, 1x4, 2x2, 2x4 MIMO



MIMO Configuration

802.16m/Mobile WiMAX

R2

Source: IEEE 802.16m

3GPP2 UMB

Source: CDG

3GPP LTE

Source: 3GPP TR 25.913Feature

IMT-Adv.(4G) Candidates Multiple Antenna Configuration Requirements

3dB Output gain means, 120% Radius gain, 140% Coverage gain & ~30% Sites reduction


Solutions


Single RAN starts in NodeB

� Distributed architecture

� Zero footprint� Digital Multi-

Carrier PA

� High-performance

HSDPA

Huawei Base S

tation Evolution

R1

R2

R3

BBU

RRU

� G/U/LTE/Wimax Co-platform

� Multi-carrier

� All IP

� Green

R4

indoor outdoorBBU

RRURFU

DBS

Uni-BTS

Now

Evolution brings simplicity and multi-technology support


Base Band Unit

Radio Remote Unit

GSM GSM+UMTS UMTS+LTE

Software upgrade to support new technologies or additional capacity

2G3G2G 3GLTE

Now FutureAntenna

BBU

Active

Antenna

Single RAN by Software Defined Radio


Single RAN High Efficiency Broad-Band

PA technology reduce OPEX

DPD+

A-Doherty

1500W

power consumption 800W

S1/1/1, Typical Configuration

Previous

Industry

Standard

Indoor

Macro

Huawei

Indoor

Macro

Huawei

DNBS

400W 520W

73% saving 35% saving

Previous

Industry

Standard

Outdoor

Macro

Huawei

Outdoor

Macro

590W

60% saving


Example: WiMAX Network Switching to LTE

CSNIP Bear Network

ASN-GW

HA

DHCP server

MME

New MME

added

Software

Upgrade to

SAE-GW

SAE-GW

eNodeB

Software

Upgrade to

LTE

Software

Upgrade to

LTEeNodeBWiMAX

BS

WiMAX

BS

Purely software upgrade to protect investment

• Same Base Station platform for WiMAX & LTE

• Same GW platform for WiMAX & LTE


Radio Unit Switching Examples

2x10MHz WiMAX20MHz LTE (TDD)

10MHz WiMAX

10MHz LTE

Multiple Carriers

WiMAX Radio Units

Dual Mode

Radio Unit

LTE(TDD) only Radio Unit

Software Upgrade

Software UpgradeSoftware Upgrade

• Multiple Carrier support, upgradeable to 20Mhz

• PA: >30%, DPD & Doherty based high output power

• Multiple antenna technologies: 2T4R/ 2T2R supported


� Pure IP core and

interfaces, the way to

internet era

� Transmission savings

� Same footprint, 3

times capacity

� 50%+ Power

amplifier efficiency

� Smooth Evolution

� Power Saving

� Reduction of

auxiliary facilities

Easy Modernization and Evolution solution

Convergence Multi-carrier

All IPGreen

Uni-BTS

� G/U/LTE Co-platform

� Software upgrade to

future

� Smooth Evolution

1 2

34


Thank You!

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