microsoft powerpoint - cdma_technology_roadmap

PT. Telekomunikasi Indonesia

1

Setyo BudiantoManager O&M Network

[email protected]

Seminar Teknologi GSM vs CDMA

PT. Telekomunikasi Indonesia 2

Content

Wireless World MarketCDMA Technology OverviewCDMA Technology Evolution


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Wireless World Market


Wireless Subscriber in The World


Key Drivers For Wireles Market Expansion

CDMA2000

WCDMA

CDMA2000

WCDMA

More Capacity, High Speed Data

Capacity/Quality

Roaming

Mobility

AMPS

TDMA/GSM

cdmaOneIS-95A

cdmaOneIS-95 BGPRS

cdmaOneIS-95 BGPRS

Medium Speed Data

Time

Multi-ModeMulti-Mode

CDMA-GSMCDMA-GSM

Global Roaming

1G 2G 3G2.5G

Multi-BandMulti-Band

Multi-Network

Multi-Network


Worldwide 2G and 3G Subscriber Trends


Wireless Handset in India


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CDMA Technology Overview


FDMA (Frequency Division Multiple Access)

TDMA (Time Division Multiple Access)

CDMA (Code Division Multiple Access)

1 user/narrowband channel4.8 TCH/Mhz/CellCapacity depends much on spectrum

8 Users/Narrowband Channel10.0 TCH/Mhz/CellCapacity depends much on spectrum

N Users/Wideband Channel8 kbps vocoder : mobile 56.1 TCH/Mhz/Cell

fixed 86.2 TCH/MHz/Cell13 kbps vocoder : mobile 29.6 TCH/Mhz/CellCapacity depends much on noise level

Multiple Access Technology


A room with several pairs of people with different languageThe air in the room is the carrierThe language is the coding systemOther languages are heard as noiseNew pairs can join to talk in the same room until it is too noisyIf people whisper, more conversation can take place

CDMA - How does coding work?


4 site, 12 frequency

repeat

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N=1 frequency repeat

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GSMGSM CDMACDMA

CDMA nearly eliminates cost of frequency planning

Frequency Planning


The mobile unit is monitored by two or more cell sitesComparing the best quality frames on frame-by-frame basisTake advantage of the moment-by-moment changesMinimizing drop call and noise during handoffs

Soft Handoff


CDMA Power ControlEnsures equal receive power from all subscribers

avoids "near-far" problem

Forward and reverse link power control MS power measured at cell site and MS is commanded to change power in small steps (1.25 msec)


Path Diversity

ReceiverReceiver

Receiver

Rake Receiver

GSM

Fading

D/A Audio

Fading

D/AReceiver

CDMAEffects of fading are mitigated through use ofmultiple receivers that sum radio signals from

different cells and from reflected rays.

Fading is more likely to cause loss of information =lower speech quality


Frequency Diversity

Outgoing Waveform

-80 dB-90 db

-110 db

-120 db

1.25 MHz

1.25 MHz

This 400 kHz fade of 12 dB only affects 1/3 of CDMA bandwidth. Therefore, total fade to CDMA user is 2 dB

Received Waveform

-80 dB-90 dB

-110 dB

-120 dB

12 dB Fade

2 dB LossCDMA

The entire 30 kHz Channel of TDMA is affected by this same fade.Therefore, total fade to end user is 12 dB

30 kHz

Outgoing Waveform

-80 dB-90 dB

-110 dB

-120 dB

30 kHz

Received Waveform

-80 dB-90 dB

-110 dB

-120 dB

12 dB Fade

12 dB LossTDMA


CDMA 2000 Network ArchitectureCircuit Switched Network

MSC

R

AAAServer

HLRWIN

BTS1

BSC1

R

InternetInternet

PCMS

Application Server

HA

MS

PDSN/FA

PSTNPSTN

Packet Switched Network

IWF

VMS SMS

BTS2BSC2

RAN

ATM


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CDMA Technology Evolution


Wireless Services Trend


The 3G Choice is CDMA

IMT-2000 Standard

• 2 Mbps in fixed or in-building environments

• 384 kbps in pedestrian or urban environments

• 144 kbps in wide area mobile environments

• Variable data rates in large geographic area systems (satellite)


200620052004200320022001200019991995 200620052004200320022001200019991995

In -Band Migration and

Designed for In-Band Migration and New Spectrum

3G CDMA

2G CDMA

1.25 MHzVoice & Data

2.5G CDMA

Rel. 4

HSDPA

Additional voice capacity doubling- Terminal antenna diversity

Rel. 5

CDMA2000 1X

14.4 kbps dataSoft HandoffSynchronous Timing

64 kbps packet data

− Channel Concatenation

Double voice capacity− Fast Fwd Power Control− Coherent Uplink 153.6 kbps packet data− Turbo Codes

307 kbps packet data

Simultaneous voice and data

Dedicated & OptimizedFor Packet Data2.4 Mbps Peak RatesAll IP Architecture

Improvementsto data services.More flexible data packet scheduling.

64/384 kbps cs/packet dataSoft handoffAsynchronous timing

Improvements to data servicesMore flexible datapacket scheduling

cdmaOne

QoS, Broadcast, Personal Media, IMM ,2x

1xEV-DV

Forward Link: Peak Rate: 3.1 mbpsReverse Link: Peak Rate:1.8 mbps

Fwd & Rev. Capacity GainsForward Link: Peak Rate 3.1 mbpsReverse Link: Peak Rate 1.8 mbps

HSUPA

Rel. 6

EnhancedUp-Link

IS - 95A IS-95B

1.25 MHzOptimized for Data

IS-2000 Rel. 0 Rel. A Rel. B Rel. C Rel. D

Designed for New Spectrum

5 MHzVoice & Data

3GPP Rel. 99

CDMA2000 1xEV-DO

UMTS(WCDMA)

IS-856, Rel. 0 Enhancements Rel. A

3G CDMA Evolution


Mobile Service Evolution


CDMA2000 Deployment


CDMA Terminals


Thank You

Merci

Grazie

Gracias

Obrigado

Danke

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