01 Cpo p01 e3 Cdma Overview 21

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CDMA Overview

ZTE University

CDMA BSS T&D Team


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Objective

Mobile Communication development history

CDMA evolution history

CDMA features and advantages

CDMA spectrum allocation

Role of ZTE in CDMA


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Evolution of Mobile Communication System


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LTE

Long Term Evolution (LTE), is called as E-UTRA/E-UTRAN, and also named Evolved 3G (E3G) with3GPP2 UMB.

LTE is based on the OFDM technology. To reduce the

user-plane delay, LTE doesnt have the RadioNetwork Controller (RNC). To a certain extent, LTE isa revolution to the communication field rather than anevolution.

The revolution makes the system inevitably losingthe compatibility of networks and terminals. Thus, thedevices at the network side and terminal side must be

updated and replaced. According to the technologyclassification, LTE belongs to the scope of 4G.

LTE


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CDMA2000 Evolution History


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CDMA Status in the World

There are 281 operators in 106 countries have selected CDMA2000 as their

own 3G platform.

By the end of 2008, more than 50% CDMA 2000 operators have provided the

mobile broadband services based on the EV-DO.


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ZTE Leading Position in CDMA

1. The first to sign the research protocols with Qualcomm

2. The first to gain the network access certificate of the BS

3. The first to be commissioned the commercial office of theCDMA BS devices in China

4. The first to produce the CDMA set-card separation handset

5. The first to get through the cdma2000-1x voice call

1. The earliest research2. The largest investment

3. The most fruitful achievements

4. The full experiences

1. Participates in standard making and subject research.2. One of the formal members of CWTS

3. One of the formal members of 3GPP and 3GPP24. One of the members of Qualcomm IPR negotiation group5. Directly participates in formulating:

800 MHz CDMA Cellular Mobile Device Test Specifications:BS Part

800 MHz CDMA Cellular Mobile Communication Network:Mobile Application Part Test Specifications.

6. Undertakes two items research of national 863 high-tech keyprojects about the 3G mobile communication.


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CDMA Features and Advantages (1)

AMPS, D-AMPS, N-AMPS

CDMA

30 30 10 kHz

200 kHz

1250 kHz

1 3 1 Users

8 Users

20 Users

1

1

1

1

1

1

1

1

1

1

11

1

1

12

34

4

32

56

17

Typical Frequency Reuse N=7



Vulnerability:

C/I @ 17 dB

Vulnerability:

C/I @ 12-14 dB

Vulnerability:Eb/No@ 6--7 dB

GSM

The simple wireless

network plan

The high coefficient

of frequency reuse

The simple

engineering design

The easy and

convenient capacity

expansion

1


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The Large coverage range, twice larger than the

standard GSM; less BSs deployed in the same

coverage range so that saving the investment2

For the 1000 km2 coverage, the GSM

needs 200 BSs while the CDMA only

needs 50 BSs. (Note: The exact resultsdepend on Link Budget).

Example


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FDMA: Different users use the different

frequencies, such as TACS and AMPS.

TDMA: Different users use the differenttime slots with one frequency, such asGSM and DAMPS.

CDMA: Different users gain different T-CHs according to various spreading codeson the same time with the same frequency.

High spectrum utilization ratio: Under the same spectrum, the capacity is

8-10 times larger than the AMPS and 4-6 times larger than the GSM.

3


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Good concealing, high privacy and hard to wiretap


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CDMA: To the cell/sector handoff, adopts the connect before breaksoft/softer handoff mode, decreasing the call drop ratio effectively.

Other wireless systems: To the cell/sector handoff, adopts the connectafter break hard handoff mode, easy to generate the call drop.

Adopts the unique soft handoff technology to decrease the call drop rate.


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Provides the high-quality voice

Uses the 8KQCELP, 8KEVRC and 13KQCELP voice coding

technology

Fulfills the favorable suppression function to the background noise.

6


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Small transmission power

Power control, voice

activation


Adopts the perfect power control and voice activation technologies to

reduce the handset transmission power, to improve the system capacity andto prolong the battery utility time, which has little effect on the users health,

so the CDMA mobile phone is called as green handset.

7

TechnologyMechanism

Average TransmissionPower

MaximumTransmission Power

GSM 125mW 2WCDMA 2mW 200mW


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Full high-speed packet structure: Easy to smoothly update to the 3G platform..1

Smoothly update to the 3G! For operators, the minimum loss

wins the maximum benefit!

8.2

Upgrades

software.

Replaceshandsets to

obtain new

services.

Zero-cost

95A 95B Adds the 1X

channel board.

Upgrades

software. Replaces

handsets toobtain newservices.

Is determinedbyrequirementsof newservices.

95B 1X Adds the 1XEV

channel board.

Upgrades

software. Replaces

handsets toobtain newservices.

Is Determinedbyrequirementsof newservices.

1X 1XEV

Technical

Economic

al


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800MHz Spectrum Assignment

1

334

667

991

1023

333

666

715

799

716

Channel

Numbers

A Band B Band AA B

1019 37 78 119 160 201 242 283 384 425 466 507 548 589 630 691 777

CDMA A-Band Carriers CDMA B-Band Carriers

8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 9 9 8

* **** Requires frequency coordination with

non-cellular interferers

**Requires frequency coordination withA-band carrier

A Band Primary Channel 283A Band Secondary Channel 691

B Band Primary Channel 384B Band Secondary Channel 777

736

Frequency

point

BS receiving (Uplink): 825.00+0.03N

BS transmitting (downlink): 870.00+0.03NCenter

frequency


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CDMA Network Architecture

Circuit Switched (CS) domain

HLRe

MSCeGMSCe

GMGWMGW

IP

transport

Core Network

Packet Switched (PS) domain

IP backbone

Network HA

PDSN/FA

AAA

other

Network

BSSB

Internet

Access Network

BBUBSCB


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ZTE CDMA Service Supply

Network optimization simulation

Networking

plan

B A

B

H

LH

B

B

G

F

H

B

H

GB

A

H

B

F

F

B

F

H

B

F

K

FB

F

-

Plan simulation

Maintenance optimization: network performance check

Wireless engineering optimization


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ZTE CDMA Product Supply


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Summary

CDMA Development Overview CDMA Features and

Advantages

CDMA Frequency Allocation

Summary


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01 Cpo p01 e3 Cdma Overview 21

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