Fundamentals of CDMA2000 1X

Dr. Shahzada Alamgir Khan

Objectives

After completion of this course participants will be able to

• Understand the structure of CDMA 2000 1X

• State the signal process flow of CDMA 2000 1X

• State the technology of CDMA 2000 1X

• Describe the interfaces of CDMA 2000 1X

• Describe the numbers in CDMA 2000 1X

Contents

• CDMA Network Structure

• Development of Mobile Communications

• Technology Roadmap

• Transmission Techniques

• Development of CDMA System

CDMA 2000 1X Network Structure

2G/3G Terminals

Abis

Abis

Abis

PSTN/PLMN

BSC/ PCF (1X)

Internet

Router Router

IP

IP

BTS （ IS-95）

BSC （ IS-95）

AbisE1

UmIS95

UmIS2000

E1 STM-1

E1 STM-1

Ethernet

MSC/VLR HLR/AUC

PDSN/FA

AAA

HA

OMC

SC

WINBTS （ IS-95）

BSC/ PCF (1X)

BTS （ 1X）

BTS （ 1X）

E1

Server

Ethernet

• PDSN also named as FA Foreign Agent

• Lower circle is known as PS domain

• Upper circle is named as CS domain

• For EVDO no CS domain is required

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1st Generation 1980s (analog)

2nd Generation 1990s (digital)

3rd Generation current (digital)

3G provides: Complete integrated service solutions High bandwidth Unified air interface Best spectral efficiency and ……………… a step towards PCS

AMPS

Analog to DigitalTACS

NMT

OTHERS

GSM

CDMA IS95

TDMA IS-136

PDC

UMTS WCDMA

CDMA 2000

TD-SCDMA

Development of Mobile Communications

Voice to Broadband

GSM/UMTS Ecosystem

CDMA 2000 Ecosystem* Theoretical. Standards in progress

Technology Roadmap

Future proofing our technology roadmap

2007 2008 2009 2010 2011 2012 2013

LTE*50 Mbps+

HSPA7 – 30 Mbps

EVDORev A

3.2Mbps

7

Page 8

Transmission Techniques

Traffic channels: different users are assigned unique code and transmitted over the same frequency band, for example, WCDMA and CDMA2000

Traffic channels: different frequency bands are allocated to different users,for example, AMPS and TACS

Traffic channels: different time slots are allocated to different users, for example, DAMPS and GSM

FrequencyTime

Power

FrequencyTime

Power

FrequencyTime

Power

FDMA

TDMA

CDMA

User

User

User

User User

User

Page 9

IS95A 9.6kbps

IS95B 115.2kbps

CDMA2000 307.2kbps Heavier voice service capacity ; Longer period of

standby time

CDMA2000 3X

CDMA2000 1X EV

1X EV-DO1X EV-DV1995 1998

20002003

Development of CDMA System

• Higher spectrum efficiency and network capacity • Higher packet data rate and more diversified services • Smooth transit to 3G