ee8315_lecture7_ cdma2000_2005_pa1

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cdma2000

© 2005 H. H’mimy Lecture 10, Slide 1SMU EE 8315 Advanced Topics in Wireless Communications - Spring’05

Southern Methodist University

EE 8315 / TC752-NAdvanced Topics in Wireless Communications

Spring 2005http://engr.smu.edu/eets/8315

Lecture 7: CDMA2000

Instructor: Dr. Hossam H’mimy, Ericsson Inc.

[email protected](972) 583-0155

cdma2000

© 2005 H. H’mim Lecture 10 Slide 2SMU EE 8315 Advanced To ics in Wireless Communications - S rin ’05



cdma2000


Course Outline…• Lecture 1

• Lecture 2

• Lecture 3

• Lecture 4• Lecture 5

• Lecture 6

• Lecture 7

• Lecture 8

• Lecture 9

• Lecture 10

1/24

1/31

2/7

2/142/21

2/28

3/7

3/14

3/21

3/28

Introduction & overview

IMT2000Traffic & simulation

Mobile IP, CDPDCSD, SMS, MMS

GPRS: RN & CN ( Abstract Due )

EDGE, GERAN

Exam

CDMA2000 1xRTT RN & CN

UMTS (WCDMA) RN & CN

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Course Outline…

• Lecture 11

• Lecture 12

• Lecture 13

• Lecture 14

4/4

4/11

4/18

4/255/2

WCDMA DesignWLAN/ HiperLAN2 ( Paper Due )

WiMax, Blutooth/ HomeRF

Paper slides and wrap up.Exam



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Outline

• cdma2000 development process• Overview of cdma2000 channel structure

– Forward link channel structures – Reverse link channel structures

• Radio configurations• Modulation and Spreading• CDMA2000 network

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cdma2000 Development Process

• Member companies to the TelecommunicationIndustry Association (TIA) made proposals for3rd generation based upon IS-95 to theInternational Telecommunications Union (ITU)

• The resulting system is a combination of manyproposals ( Qcom, Lu, NT, Nok, Samsung, Mot,..)

• ITU proposal evolved into IS-2000 standard – First published Summer, 1999

• Operators Harmonization Group (OHG)specified aspects for global 3G CDMA standardin May, 2000 – Covered ETSI proposal (WCDMA) and cdma2000



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Introduction ..

• There is over 6 million mobile subscribers in Japan KDDImarket with 1XRTT capability.

• The advances in the 1XRTT technology allows an increasein capacity of approximately 1.7% for voice traffic and data

throughput of approximately 144kbps• 2nd phase of CDMA2000, which is EVDo (HDR) allows a

peak throughput of 2.4Mbps and an average of 644kbps• Release C: CDMA 2000 EVDV will allow a peak throughput

of 3.1Mbps and an average of 1Mbps. Qualcom put thedevelopment of EVDV on hold for now.

• Release D: UL improvement.• Alignment between 3GPP and 3GPP2 is the adoptation of IP

Multimedia sub-system (IMS) in the CN

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cdma2000 ..

• 1x RTT 1.288Mcps• 3x RTT

– Direct sequence

– Multi carrier

DL only



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IP

CDMA2000

• CDMA2000

L1

LACPPP

IPTCP

L1MAC

Relay

L1

RP

PDSNBSCMS

MAC

LAC

L1

RP

PPP

L1

L2

IPIPsec

L1

L2

IPIPsec

IP

L1

L2

IP

L1

L2

HA host

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Detailed protocol stack



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CDMA2000 network

MS

HLR

broker AAA

BTS

BSC

MSC/VLR

SS7

A’

A

PDSN

visited AAA

Home AAA

IP

Home IP

AAA brokerIP Net

HA

R-P

PSTN

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Core Network

• R5 (UMTS) CN and IP Multimedia sub-system(IMS) – MSC MSC-Server + Media Gateway – GMSC GMSC-Server + MGW

– PS will all be IP based – Server: signaling – MGW: Switching of data and IWF ( echo canceller + – USING SIP

• R6 (UMTS) IMS – CS services on IP CN



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IMS

• Media Resource function (MRF) – Control/ mix different media streams

• Call Session Control Function (CSCF)

– Proxy ( first POC for Terminal in the IMS. – Firewall – handle session state.

• Media Gateway control function(MGCF) – Protocol conversion – Control in CS domain – May perform echo-canceling

MRF CSCF MGCF

BSC MGW MGW

Services andapplications

PDSN

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Forward Link Channel Structure

Channel Type Maximum Number

Forward Pilot Channel 1

Transmit Diversity Pilot Channel 1

Auxiliary Pilot Channel Not specified

Auxiliary Transmit Diversity Pilot Channel Not specified

Sync Channel 1

Paging Channel 7

Broadcast Channel Not specified

Quick Paging Channel 3

Common Power Control Channel 7

Common Assignment Channel 7

Forward Common Control Channel 7

Forward Dedicated Control Channel 1*

Forward Fundamental Channel 1*

Forward Supplemental Channel 2*

* per Forward Traffic Channel



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Logical Channel• Forward link (Down link )

• Common Control Channels (F-CMCH / R-CMCH) – Carry MAC signaling

• Dedicated Traffic ( F-DTCH / R-DTCH) – P2P used by single terminal

• Common Signaling Channel (F-CSCH / R-CSCH) – P2M for signaling

• Dedicated Signaling Channel (F-DSCH / R-DSCH) – P2P signaling

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Forward Link Channel Structure• Forward link - Common Channels

– Forward Pilot Channel (F-PICH) - beacon signal used for maintainingactive set information and for coherent detection when the Auxiliary Pilot isnot present ( HO measurements, cell selection,..)

– Forward Transmit Diversity Pilot Channel - pilot used for transmit antenna

diversity – Forward Common Auxiliary Pilot Channel - pilot used for spot coverage – Forward Auxiliary Transmit Diversity Pilot Channel - pilot used for transmit

diversity applications – Forward Paging Channel (F-PCH) - paging channel – Forward Common Control Channel (F-CCH) - “enhanced” paging channel,

control channel for MAC and common traffic channel



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• Forward link - Common Channels (cont.) – Forward Sync Channel - Used by mobile for acquiring initial timing

and other global parameters symbol rate 1.2kbps. – Forward Broadcast Channel (F-BCCH) - General purpose

broadcast 19.2kbps with rate 1/3 convolutional. – Forward Quick Paging Channel (F-QPCH) - Used for alerting

mobiles in standby mode that a page is coming on the Pagingchannel

– Forward Common Power Control Channel (F-CPCH) - Used fortransmitting power control commands to mobiles which do not haveactive dedicated channels with 200/400/800 Hz

– Forward Common Assignment Channel (F-CACH) - Used forcontrol of mobiles which transmit bursty data

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• Forward link - Dedicated Channels – Forward Fundamental Channel (F-FCH) - basic low rate

channel used for voice, low rate data, signaling, and powercontrol

– Forward Supplemental Channel (F-SCH) - high data ratechannel

– Forward Dedicated Control Channel (F-DCCH) - MACsignaling channel



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Reverse Link Channel Structure

Channel Type Maximum Number

Reverse Pilot Channel 1

Access Channel 1

Enhanced Access Channel 1

Reverse Common Control Channel 1

Reverse Dedicated Control Channel 1

Reverse Fundamental Channel 1

Reverse Supplemental Channel 2

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• Reverse link - Common Channels – Reverse Pilot Channel (R-PICH) - pilot used for coherent

detection and power control – Reverse Access Channel (R-ACH) - access channel – Reverse Common Control Channel (R-CCCH) - control

channel and common traffic channel – Reverse Enhanced Access Channel (R-EACH) - enhanced

access mode used for delivery of bursty data; can be used inpower-controlled mode



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• Reverse Link - Dedicated Channels – Reverse Fundamental Channel (R-FCH) - basic low rate

channel used for voice, low rate data, signaling, and power

control – Reverse Supplemental Chanel (R-SCH) - high rate data

channel RC 3 - 6 only – Reverse Dedicated Control Channel (R-DCCH) - MAC

signaling channel

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Radio Configurations

• Several Radio Configurations exist for cdma2000 – RC1 and RC2 are IS-95 compliant – RC3, RC4 ,and RC5 are for 1.25 MHz bandwidth – RC6, RC7, RC8, RC9 are for triple-bandwidth deployments

– Formed by the use of 3 x1.25 MHz carriers on ForwardLink: "Multicarrier" CDMA

• Spreading rates for spreading codes – Spreading rate 1: 1.2288 Mcps (RC1-RC5) – Spreading rate 3: 3.684 Mcps (RC6-RC9)



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Forward

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Reverse



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F-FCH and F-SCH : RC 3

Data RateBits/Frame Bits (kbps) R Factor Deletion Symbols Rate (ksps)

24 Bits/5 ms 16 9.6 1/4 1 × None 192 38.4

16 Bits/20 ms 6 1.5 1/4 8 × 1 of 5 768 38.440 Bits/20n ms 6 2.7/n 1/4 4 × 1 of 9 768 38.4/n80 Bits/20n ms 8 4.8/n 1/4 2 × None 768 38.4/n

172 Bits/20n ms 12 9.6/n 1/4 1 × None 768 38.4/n

360 Bits/20n ms 16 19.2/n 1/4 1 × None 1,536 76.8/n744 Bits/20n ms 16 38.4/n 1/4 1 × None 3,072 153.6/n

1,512 Bits/20n ms 16 76.8/n 1/4 1 × None 6,144 307.2/n3,048 Bits/20n ms 16 153.6/n 1/4 1 × None 12,288 614.4/n

1 to 3,047 Bits/20n ms

Convolutionalor TurboEncoder

SymbolRepetition

SymbolPuncture

BlockInterleaver

AddFrameQuality

Indicator

Add 8Reserved/Encoder

Tail Bits

ChannelBits

ModulationSymbol

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F-FCH and F-SCH: RC4


24 Bits/5 ms 16 9.6 1/2 1 × None 96 19.2

16 Bits/20 ms 6 1.5 1/2 8 × 1 of 5 384 19.240 Bits/20n ms 6 2.7/n 1/2 4 × 1 of 9 384 19.2/n80 Bits/20n ms 8 4.8/n 1/2 2 × None 384 19.2/n

172 Bits/20n ms 12 9.6/n 1/2 1 × None 384 19.2/n

360 Bits/20n ms 16 19.2/n 1/2 1 × None 768 38.4/n744 Bits/20n ms 16 38.4/n 1/2 1 × None 1,536 76.8/n

1,512 Bits/20n ms 16 76.8/n 1/2 1 × None 3,072 153.6/n3,048 Bits/20n ms 16 153.6/n 1/2 1 × None 6,144 307.2/n6,120 Bits/20n ms 16 307.2/n 1/2 1 × None 12,288 614.4/n



SymbolRepetition

SymbolPuncture

BlockInterleaver

AddFrameQuality

Indicator

Add 8Reserved/

Encoder Tail Bits

ChannelBits

ModulationSymbol



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Forward Link I & Q Mapping and WalshModulation Multicarrier

D e m u l t i p l e x e r

Carrier 3

Carrier 2

Carrier 1

I1

Q1

ComplexPN

SpreadingBaseband

filter

I N

Q N

I2

Q2

cos(2 π f 1t)

sin(2 π f 1t)

I1 (t)

Q1 (t)

cos(2 π f 2t)

sin(2 π f 2t)

I2 (t)

Q2 (t)

WmN cos(2 π f Nt)

sin(2 π f N

t)

I N(t)

Q N(t)

Muxand

IQ Map0 → +11 → -1

PC Bits16 bits/20 ms± 1 Values (Optional)

Z

Basebandfilter

Long CodeGenerator

Long CodeMask For User m

BitSelector

Z

ComplexPN

Spreading

Wm2

Muxand

IQ Map0 → +11 → -1

Basebandfilter

Basebandfilter

Basebandfilter

ComplexPN

Spreading

Wm1

Muxand

IQ Map0 → +11 → -1

Basebandfilter

Z

Z

ModulationSymbol

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Forward Link I & Q Mapping and WalshModulation Direct Spread

MUXa nd

SignalPoint

Mapping0 +11 –1

Long CodeMask for User m

LongCode

Generator

BitSelector

MUX Control

DataChannel

Gain

PCChannel

Gain

DataChannel

Gain

PuncturePC Sym.

I

PC Bits16 bits/frame

±1 Values

Walsh

N X 1.22 88 Mbps

Puncture

PC Sym.

YI

YQ

(Optional)

(Optional)

ModulationSymbol



cdma2000


Forward Link PN Spreading and BasebandFiltering Direct Spread

BasebandFilter

BasebandFilter

PN I

PN I

PN Q

PN Q

cos(2 π f ct)

sin(2 π f ct)

s(t)

+

-

+

+

YI

YQ

PN I = I-Channel PN Sequence,N X 1.2288 Mcps

PN Q= Q-Channel PN Sequence,N X 1.2288 Mcps

cdma2000


Transmit Diversity

• Transmit diversity adopted in cdma2000 – Means of increasing spectral efficiency using multiple

transmit antennas on forward link

• Two modes adopted in cdma2000 – Orthogonal transmit diversity (OTD) – Space-time spreading (STS)



cdma2000


Reverse Link Channel Structure - RC3/RC4

RelativeGain

RelativeGain

RelativeGain

+

+

Complex Multiplier

–

+

+

+

BasebandFilter

BasebandFilter

cos(2 π f c t)

sin(2 π f c t)

GainWalsh Cover(+ + + + + + + + – – – – – – – – )

Walsh Cover(+ + + + – – – – + + + + – – – – )

Walsh Cover(+ – ) or (+ + – – )

for Reverse Supplemental Channel 1(+ + – – + + – – )

for Reverse Common Control Channeland Enhanced Access Channel

B

C

C

ReversePilot

Channel

ReverseSupplemental

Channel 1, ReverseCommon Control

Channel, or EnhancedAccess Channel

ReverseFundamental

Channel

ReverseDedicated

Control Channel

Σ

Σ

Σ

Decimatorby Factor

of 2

Walsh Cover(+ – )

C

A

RelativeGain

+

ReverseSupplemental

Channel 2

Walsh Cover(+ + – – ) or (+ + – – – – + +)

s(t)

1-ChipDelay

Long CodeGenerator

(1.2288 Mcps)

Q-ChannelPN Sequence

I-ChannelPN Sequence

Long CodeMask

I-ChannelData

Q-ChannelData

+

+

Σ

Σ+

+

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R-FCH and R-SCH: RC3


24 Bits/5 ms 16 9.6 1/4 2 × None 384 76.8

16 Bits/20 ms 6 1.5 1/4 16 × 1 of 5 1,536 76.840 Bits/20n ms 6 2.7/n 1/4 8 × 1 of 9 1,536 76.8/n80 Bits/20n ms 8 4.8/n 1/4 4 × None 1,536 76.8/n

172 Bits/20n ms 12 9.6/n 1/4 2 × None 1,536 76.8/n

360 Bits/20n ms 16 19.2/n 1/4 1× None 1,536 76.8/n744 Bits/20n ms 16 38.4/n 1/4 1 × None 3,072 153.6/n

1,512 Bits/20n ms 16 76.8/n 1/4 1 × None 6,144 307.2/n3,048 Bits/20n ms 16 153.6/n 1/4 1 × None 12,288 614.4/n6,120 Bits/20n ms 16 307.2/n 1/2 1 × None 12,288 614.4/n



SymbolRepetition

SymbolPuncture

BlockInterleaver

AddFrameQuality

Indicator


Tail Bits

ChannelBits C

ModulationSymbol



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R-FCH and R-SCH: RC4

Data RateBits/Frame Bits Bits (kbps) R Factor Deletion Symbols Rate (ksps)

24 Bits/5 ms 0 16 9.6 1/4 2 × None 384 76.8

21 Bits/20 ms 1 6 1.8 1/4 16 × 8 of 24 1,536 76.855 Bits/20n ms 1 8 3.6/n 1/4 8 × 8 of 24 1,536 76.8/n

125 Bits/20n ms 1 10 7.2/n 1/4 4 × 8 of 24 1,536 76.8/n267 Bits/20n ms 1 12 14.4/n 1/4 2 × 8 of 24 1,536 76.8/n

552 Bits/20n ms 0 16 28.8/n 1/4 1 × 4 of 12 1,536 76.8/n1,128 Bits/20n ms 0 16 57.6/n 1/4 1 × 4 of 12 3,072 153.6/n2,280 Bits/20n ms 0 16 115.2/n 1/4 1 × 4 of 12 6,144 307.2/n4,584 Bits/20n ms 0 16 230.4/n 1/4 1 × 4 of 12 12,288 614.4/n

1 to 4,583 Bits/20n ms 0

ChannelBits


SymbolRepetition

SymbolPuncture

BlockInterleaver

AddFrameQuality

Indicator


Tail Bits

AddReserved

BitsC

ModulationSymbol

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1X EVolution

• 1xEV – Frame 26.67 msec – Started with Data only 1xEVDo ( HDR)

– Shared Forward Link =>Power proportional to Data Rate – Schedule algorithm optimize data rate for all users – Time multiplexed: Pilot Channel, forward MAC Channel,

Forward Traffic Channel or the Control Channel. – Adaptive coding and Modulation

– delayed phase 2005? 1xEVDV



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CDMA2000 1xEVDo

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• 1xEVDO reverse link – Access Channel: Pilot Channel and a Data Channel – Traffic Channel. a Pilot Channel, MAC Channel, ACK

Channel, Data Channel. – MAC Channels contains a Reverse Rate Indicator (RRI)

Channel and a Data Rate Control (DRC) Channel.



cdma2000


Reading

• Ch 5 section 5.7.2 (IMS)• CH 14.

ee8315_lecture7_ cdma2000_2005_pa1

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