Maximize the Value of CDMA Networks and Smoothly Evolve to the Next GenerationMaximize the Value of CDMA Networks and Smoothly Evolve to the Next Generation

Sean CaiVP Wireless, ZTE Corporation 

Sean CaiVP Wireless, ZTE Corporation 

CDG Technology Forum 2011

Technology Evolution  

Table of Contents 

Maximizing Values of CDMA 

Smooth Migration to LTE

33

2G3G

UMTS, CDMA, TD-SCDMA

4G

GSM, IS-95

Mobile Technology Evolution Mobile Technology Evolution 

Mobile Market TrendsMobile Market Trends

Source: CDG

55

Different CharacteristicsDifferent Characteristics

Basic ServicesGuaranteed communication connections at anytime and anywhere.

Value Added ServicesRequiring high throughput and low latency communication connections covered in relative small areas or hot spots.

66

High Traffic Increase vs.. Slow Revenue GrowthHigh Traffic Increase vs.. Slow Revenue Growth

Source: 3rd party

Global Mobile Revenue (million USD)Mobile Data Traffic and Revenue

Source: 3rd party

77

Concurrent Voice & Data ServicesConcurrent Voice & Data Services

Voice and Data Concurrent ServicesCDMA currently does not support voice and data concurrent services. But this is a very important feature for smart phones.

Overloaded Data Services Impact on Voice CallsData service not only increases the data traffic, but also occupies a lot of bandwidth on signaling channel, which causes high call drop rate.

88

Dual Network ArchitectureDual Network Architecture

8 8

GSM/UMTS/LTE

xGSN

BSC/RNC

Servers

EPC

Voice bearer network (IP)

Internet bearer network (IP)

Voice

Broadband Data

No TCO Increases!

99

Independent Migration PathsIndependent Migration Paths

Smooth EvolutionSmooth Evolution

CDMA and LTE

CDMA2000 1X AdvCDMA2000 1X

CDMA2000 HRPD

1010

Different Deployment StrategyDifferent Deployment Strategy

Voice NetworksWide area coverage for voice and low throughput data services

SuburbUrban areaHot spot

To cover high density areas for data servicesInterworking and evolving to single data network

Technology Evolution  

Table of Contents 

Maximizing Values of CDMA 

Smooth Migration to LTE

1212

Voice Quality  Voice Quality  

1313

Values of CDMA Voice Networks  Values of CDMA Voice Networks  

Title in hereVoice Quality

Title in here

Network Coverage

System Capacity

CDMA Technology

1414

Voice Capacity Voice Capacity 

1515

Radio CoverageRadio Coverage

Without soft handoffWithout soft handoff

Discontinuous power transmission mode

Discontinuous power transmission mode

AMR  12 . 2 kbpsAMR  12 . 2 kbps

Soft handoffSoft handoff

Continuous power transmission mode

Continuous power transmission mode

EVRC‐BEVRC‐B

1X Advanced LTE VoIP

1 ~ 2 db1 ~ 2 db

6 db6 db

2 . 6 db2 . 6 db

RL Budget Difference

10 db10 db

1616

Migration to 1X AdvancedMigration to 1X Advanced

EVRC‐B(4GV)

Mobile Receive Diversity (MRD)

Quasi Linear Iinterference Cancellation (QLIC)

Quasi Orthogonal Function(QOF)

Software Upgrade

Smart Blanking of the 1/8 rate frame

Improved closed loop power control

Early termination of forward and reverse links

Hardware upgrade required

Enhanced FL IC

Reverse Link Interference Cancellation (RLIC)

50% More Capacity Gain

Over 3x  Capacity Gain

1717

Benefits to Data ServicesBenefits to Data Services

The same voice capacity on 1x advanced only takes 25% 

of the existing spectrum.

The same voice capacity on 1X advanced only takes 25% of the existing spectrum.Saved spectrum can be used for DO or LTE to increase data capacity.

CDMA Network MigrationCDMA Network Migration

Technology Evolution  

Table of Contents 

Maximizing Values of CDMA 

Smooth Migration to LTE

1919

Future Network Consideration  Future Network Consideration  

2020

CDMA2000 1X

Baseband module + software upgrade

CDMA2000 1XCDMA2000 EV‐DO

LTE and CDMA enhancement

SDR BBU Platform

MultiMulti‐‐Radio TechnologiesRadio Technologies

Baseband module + software upgrade

Single PlatformSingle Platform

UNI‐RAN for Multi‐Radio TechnologiesUNI‐RAN for Multi‐Radio Technologies

2121

Single PlatformSingle Platform

RRU

CDMA RRU

700MHz 

LTE(5M)

> 100MHz

CDMA

LTE RRU

800MHz  1900MHz

LTE

< 20MHz

CDMA

CDMA + LTE RRU

UNI‐RAN for Multi‐band RadiosUNI‐RAN for Multi‐band Radios

2222

Outdoor InstallationIndoor InstallationPowerTrans

Feeder

RRU BBU 

BatteryPower

Transmission

Centralized Installation Centralized Installation 

Distributed InstallationDistributed Installation

FeederFiber

C/L Dual‐ModeC/L Dual‐Mode

C/L Dual‐ModeC/L Dual‐Mode

Equipment sharing 

Equipment room sharing 

Power supply and battery sharing 

Tower sharing 

Feeder sharing 

UNI‐RAN: Much Easier to InstallUNI‐RAN: Much Easier to Install

2323

Core network

Wireless network

UNI‐CORE for Smooth Network MigrationUNI‐CORE for Smooth Network Migration

2424

Core network

Wireless network

UNI‐CORE for Smooth Network MigrationUNI‐CORE for Smooth Network Migration

2525

Combined BSC/RNC

Multi-mode BBU

Multi-modeBaseband Cluster

MSR/MBR/SDR Unified-User ProfileService PlatformUnified-NMS

Unified Gateway

Micro/Pico/Femto

UNI-BEARER

Unified Network PlatformsUnified Network Platforms

Voice & Data dual network strategy 

Maximized the values of CDMA

Maximized spectrum efficiency of voice for data services

Unified Network Platform provides a way to smoothly migrate to LTE

Summary: