3g System Wall Chart

8/4/2019 3g System Wall Chart

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PulseShapingFilter

RFOut

DataChannel

1

DataChannel

N

Linear

Summation

Spread Spectrum Code(PN Code or Gold Code)

FECCoding

OrthogonalCode 1

OrthogonalCode N

1:2Demux

PulseShaping

Filter

I/QModulator

CRCCoding

Inter-leaving

CRCCoding

ComplexMultiplier

(I + jQ)

FECCoding

Inter-leaving

D/A

D/A

SSC_Q SSC_I

I

Q

I

Q

I

Q

Allows for

error detectionin the receiver

Allows for

errorcorrection

in the

receiver

Improves

errorcorrection

in the

receiver

Gives a unique

identity toeach data

stream

Maps

digital bitsto analog

signals

0 +1

1 -1

Provides 2x

higher datarate

(WCDMA,cdma2000

downlink)

Gives a unique

identity to thistransmitter

Contains

transmittedfrequencyspectrum

Allows both signals

from 1:2 Demux toshare the same RF

bandwidth

Pre-coded data (bits) Symbols Chips

Cellular CDMA Transmitter

+

+



CDMA RAKE Receiver Architecture

BPF LPF

“I” PN

Code(+1/-1)

“Q” PN Code

(+1/-1)

Orthogonal

Code(+1/-1)

Integrateover

„SF‟ chips

De-Interleave

Data

Viterbi/Turbo

Decoder

CRCVerification

DecodedOutputBits

ErrorIndication

cos(2f RFt)

PilotOrthogonal

Code(all zeros)

TimingAdj.

bit rate = chip rate / SF

cos(2f IFt)

Carrier Frequency Tracking Loop

Other Rake Receiver Finger

Rake Receiver “Finger”

D

D

I/Q

Demod

Correlator



MobileSwitching

Center(MSC)

BaseStation

Controller(BSC)

Base

Transceiver

Station

(BTS)

To other

BTS’s

Toother

BSC’s

To otherBTS’s

Um

Um

Um

Abis

Abis

Abis

A

A

E

VLR HLR

EIR

Gateway

MSC

AC

H F

CB

Toother

MSC’s

E

F

C

VLR

B

D

G

GPRS Network Components

D

GSM/GPRS Network Architecture

Packet

ControlUnit

(PCU)

Serving GPRSSupport Node

(SGSN)

Gateway GPRSSupport Node

(GGSN)

External Networks

PSTN

ISDN

Internet

...

External Data

Network

IP / X.25

To

other

BSC’s

A

Base Station

Subsystem

(BSS)



MobileSwitching

Center(MSC)

RNCNode B

(BTS)

To other

RNC’s

To other

RNC’s

Uu

Uu

Uu

IuE

VLR HLR

EIR

Gateway

MSC

AC

H F

CB

To

otherMSC’s

E

F

C

VLR

B

D

G

GPRS Network Components

D

WCDMA/UMTS Network Architecture

Serving GPRS

Support Node(SGSN)

Gateway GPRS

Support Node(GGSN)

External Networks

PSTN

ISDN

Internet

...

External Data

Network

IP / X.25

Radio Network Subsystem

(RNS)

Iub

RNCNode B

(BTS)

Uu

Uu

IuIub

Iu

Iu

Iu

UMTS

Terrestrial Radio Access Network

(UTRAN) Core Network

(CN)

Iu

Iur



Logical Channels(Layers 3+)

Transport Channels(Layer 2)

Physical Channels(Layer 1)

UplinkRF Out

WCDMA Uplink (FDD)

UE

Scrambling

Code

I+jQ I/QMod.

Q

I

Chc

I

Filter

Filter

CCCHCommon Control Ch.

DTCH (packet mode) Dedicated Traffic Ch.

RACHRandom Access Ch.

PRACHPhysical Random Access Ch.

DPDCH #1Dedicated Physical Data Ch.

CPCHCommon Packet Ch.

PCPCHPhysical Common Packet Ch.

Data

Coding

DataCoding

DPDCH #3 (optional)Dedicated Physical Data Ch.





Q

DPCCHDedicated Physical Control Ch.

Pilot, TPC, TFCI bits

Chd

Gc

Gd

j

Chd,1 Gd

Chd,3 Gd

Chd,5 Gd

Chd,2 Gd

Chd,4 Gd

Chd,6 Gd

Chc Gd

Chc

Chd

Gc

Gd

j

RACH Control Part

PCPCH Control Part

j

DCCHDedicated Control Ch.

DTCHDedicated Traffic Ch. N

DCHDedicated Ch.

DataEncoding

DTCHDedicated Traffic Ch. 1

DCHDedicated Ch.

Data

Encoding M

U X

CCTrCH

DCHDedicated Ch.

Data

Encoding



BCCHBroadcast Control Ch.

PCCHPaging Control Ch.




BCHBroadcast Ch.

PCHPaging Ch.

FACHForward Access Ch.

DCHDedicated Ch.

P-CCPCH(*)Primary Common Control Physical Ch.

S-CCPCHSecondary Common Control Physical Ch.

DPDCH (up to 14 per carrier)Dedicated Physical Data Ch.

TFCI bits

SSCi

Logical Channels

(Layers 3+)

Transport Channels

(Layer 2)

Physical Channels

(Layer 1)

DownlinkRF Out

DSCHDownlink Shared Ch.

SHCCHDSCH Control Ch.

CTCHCommon Traffic Ch.

DataEncoding

DataEncoding

Data

Encoding

Data

Encoding

Data

Encoding

PDSCHPhysical Downlink Shared Channel

PICH(Paging Indication Channel )

Paging Indication bits

WCDMA Downlink (TDD)

S/P

S/P

S/P

S/P

S/P

Cell-specific

ScramblingCode

I+jQI/Q

Modulator

Q

I

Cch

Cch

Cch

Cch

Cch 256,1

GS

PSC

GP

Sync Codes(*)

* Note regarding P-CCPCH and SCH

Sync Codes are transmitted only in bits 0-255 of each timeP-CCPCH transmits only during the remaining bits of each

Filter

Filter

Gain

Gain

Gain

Gain

SCH (Sync Channel)

DTCH

Dedicated Traffic Ch. 1

DCH

Dedicated Ch.

Data

Encoding

MU

X

CCTrCH

DCHDedicated Ch.

Data

Encoding



Logical Channels(Layers 3+)

Transport Channels(Layer 2)

UplinkRF Out

WCDMA Uplink (TDD)

UE

Scrambling

Code

I+jQ I/QMod.

Q

IFilter

Filter


RACHRandom Access Ch.

PRACHPhysical Random Access Ch.

DPDCH #1Dedicated Physical Data Ch.

Data

Coding




TPC, TFCI bits

RACH Control Part



DCHDedicated Ch.

Data

Encoding

DTCHDedicated Traffic Ch. 1

DCHDedicated Ch.

Data

Encoding

M

U X

CCTrCH

DCHDedicated Ch.

Data

Encoding

USCHDownlink Shared Ch.

SHCCHUSCH Control Ch.

Data

Encoding PUSCHPhysical Uplink Shared Channel

S/P

Cch Gain

S/P

Cch Gain

S/P

Cch Gain

S/P

Cch Gain

S/P

Cch Gain

S/P

Cch Gain

3g System Wall Chart

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