Modul 12.a _te4103_new Version Wcdma

8/9/2019 Modul 12.a _te4103_new Version Wcdma

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Modul 12 b Standar WCDMA1

TE 4103 SISTEM KOMUNIKASI BERGERAK

Modul 12 b. Standar WCDMA

Jurusan Teknik Elektro STTTelkom

2005


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Modul 12 b Standar WCDMA

2 Obyektif Pengajaran

Memahami karakteritik khas sistem celullar

WCDMAMemahami arsitektur dasar WCDMA.

Memahami evolusi sistem celular WCDMA


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3 Outline

Introduction WCDMA Brief Discussion of Physical Layer

Uplink Downlink

cdma2000 Brief Discussion of Physical Layer Uplink Downlink

cdma2000 versus WCDMA 4G Mobile Broadband Systems Overview References


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4 Evolution of Standards

GSM

IS-95A

PDC

IS-136

cdma2000

iDEN

1xEV-DVIS-95B

1xEV-DO

GPRS EDGE

W-CDMA HSPDA

2G 2.5G 3G

world

Japan

U.S.

U.S.

U.S./Asia


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10 What is Third Generation?

Flexible support of multiple services (data rates from kbps to

Mbps; packet transmission) Voice

Messaging email, fax, etc.

Medium-rate multimedia Internet access, educational

High-rate multimedia file transfer, video High-rate interactive multimedia video teleconferencing,

telemedicine, etc.

Mobility: quasi-stationary to high-speed platforms

Global roaming: ubiquitous, seamless coverage

Evolution from second generation systems



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14

5th Supplier5th Supplier

- UMTS RAN- UMTS RAN

BSCBSCBSCBSC PCUPCUPCUPCU

PSTNPSTN

MSCMSCMSCMSC

XCDRXCDRXCDRXCDR

GGSNGGSNGGSNGGSN

SGSNSGSNSGSNSGSN

BTSBTSBTSBTS

GMSCGMSCGMSCGMSC

BSCBSCBSCBSC

XCDRXCDRXCDRXCDR

BTSBTSBTSBTS

RNCRNCRNCRNC

NODE BNODE BNODE BNODE B NODE BNODE BNODE BNODE B

UMTS RANUMTS RAN

IuGb

A

4

22

11

55

33

ServerServerServerServerPPDNPPDNPPDNPPDN

Single MSC/Single MSC/+ BSS Supplier+ BSS Supplier

22

ndnd

SupplierSupplier- BSS- BSS

33rdrd

SupplierSupplier- GPRS Core- GPRS Core

NetworkNetwork

44thth SupplierSupplier

- Service Framework- Service Framework

Integrasi Dengan 3GIntegrasi Dengan 3G

Ini jaringan3G dengankemampuanyanglengkap !!


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15 Node B

Gambar 2.7 Gambaran Node B

RNC

Node B

UE

Uu

Iub

Physical Node* Connected via Uu/Iub* Support of 1/several cells* FDD and/or TDD Mode

operation* ATM Termination (Iub)* Data conversion for Uutransmision* Inner Loop PC* Measurement reports* FDD : Micro Diversity

(Softer HO )


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16 Radio Network Controller ( RNC )

Gambar 2.7 Kegunaan RNC

RNC

UE

RNC

D-RNC

* Orty RRAllocation

S-RNC:

* Combining/

Splicing

* Active Set* RRAllocation

Core Network CN

RNCFunction :* Autonomous RRM

* ATM Switching &Multiplexing

* Control Over RNS

* O&M Interface

Uu Uu

Uu

Iub

Iu

Iur

Iub

Iub

Iu

UTRAN : TS 25.401

WCDMA V d 2000


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17 WCDMA Versus cdma2000

Parameter W-CDMA cdma2000

Carrier spacing 5 M H z 3.75 M Hz

Chip rate 3.84 M cps 3.6864 M cps

Data modulation BPSK FW QP SK ; RV- BP SK

Spreading Complex (O QPSK) Complex (OQPSK)

Pow er control frequency 1500 Hz 800 Hz

Variable data rate implem ent.Variable S F; m ultico de R ep eti., p un ctu rin g, m ultico d

Frame duration 10 ms 20 ms

Coding Turbo and convolutional Turbo and convolutional

Base stations synchronized? Asynchronous Synchronous

Base station acquisition/detect3 step; slo t, frame, code Time shifted PN correlation

Forward link pilot TDM dedicated pilot CDM common pilot

Antenna beam forming TDM dedicated pilot Auxiliary pilot


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28

Ch l T i WCDMA


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29 Channel Types in WCDMA

Uplink Dedicated : DPCCH + 1 or

more DPDCHs

Random Access Channel

Common Packet Channel

Downlink

Dedicated

Synchronization Channel

(SCH) used by terminal

to find the cell Primary

Secondary;

Common Pilot Channel

Primary Common Control

Physical Channel

Secondary Common Control

Physical Channel

Random Access Channel for

Signaling Transmission Acquisition Indicator Channel

Paging Indicator Channel

WCDMA Uplink Frame Structure


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30 WCDMA Uplink Frame Structure

DPDCHI: data channel

Q: sync & control DPCCH

k

data 10 2 bits ( 0, ,6)N k= = K

chips2560 =slot

T

pilot bitsNPilot: TFCI FBI TPC

DPDCH = dedicated physical data channelDPCCH = dedicated physical control channel

TFCI = transmit format combination indicator

FBI = feedback information (used with DL transmission diversity)

TPC = transmit power control (always present)

DPCCH + DPDCH = coded composite transport channel (CCTrCh)

ms667.0

slot 0 slot 1 slot i slot 14

radio frame = 10 ms

Rate Examples:

SF = 56; Chan. bit rate = 5 kbps (7.5 kbps)

SF = 8; Chan. bit rate = 30 kbps (5 kbps)

. . .

SF = 4; Chan. bit rate = 960 kbps (480 kbps)

SF = 4; Chan. bit rate = 5740 (6 codes)

d 2000 WCDMA


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31 cdma2000 versus WCDMA

cdma2000 Backward compatible with cdmaOne

Can evolve in steps 1 RTT; then 3 RTT

cdmaOne has only 12% market share world-wide

WCDMA Physical layer is not backward compatible with GSM

2.5G is still a TDMA-based system GSM has 60+% market share world-wide


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32 Core & Radio Access Network UMTS

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33 Radio Spektrum UMTS

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34 Core Network Architecture UMTS

TE ... Terminal EquipmentMT ... Mobile TerminalUTRAN ... Access NetworkERAN ... Edge Access NetworkSGSN ... Serving GPRS Support NodeGGSN ... Gateway GPRS Support Node

HSS ... Home Subscriber ServerCSCF ... Call State Control Function

R-SGW ... Roaming Signalling Gateway FunctionMGCF ... Media Gateway Control FunctionMGW ... Media Gateway Function

T-SGW ... Transport Signalling Gateway Function

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35 Arsitek Jaringan UMTS

BTS

BTS

BSC

RNC

VLR

NODE B

NODE B

NODE B

RNC

MSC GMSC

GGSNSGSN

VLR

OMC

UE(USIM)

TC

PDNe.g. internet,intranet, X-25

PSTN

ISDN

AuC

HLR

A

Gb

Iu CS

Iu PS Gn Gi

Iu

ExternalNetwork

GSM BSS

TRAU

Abis

Iub

Iub

USIM & SIM for

GSM, UMTS &UMTS/GSMTerminals

Iur

GSM Phase 2+ Core Network

Um

Uu

UTRAN

Gambar 2.4 Arsitektur Jaringan UMTS

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36Struktur Interface Protokol UMTS

Layer 1- Physical

Layer 2- MediumAccessControl (MAC)

Layer 2- RadioLinkControl (RLC)

Layer 2-Broadcast /

MulticastControl (BMC)

Layer 2- PacketDataProtocolConvergence

(PDCP)

Layer 3-

RadioResourceControl (RRC)

Control Plane User Plane

U-PlaneRadioBearers

Logical Channels

Transport Channels

Control

Control

Control

Control

Control

Gambar 2.8 Struktur Protokol Antar Muka Udara UMTS

Signalling

radiobearers

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37 Radio Network Architecture UMTS

38 C it M bilit A t f 3G/4G


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38 Capacity-Mobility Aspects of 3G/4G

Mobility

Capacity (Mb/s)

GSM

WCDMA

BroadbandRadio

MBS

LMDSBSM

0.0 0. 0 00

BSM = Broadband satellite multimedia

GSM = European G system

LMDS = Local multipoint distribution systems

MBS = Mobile broadband systems

WCDMA = European 3G system

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39 4G Mobile Broadband Systems A variety of technology standards able to provide

transmission rates beyond 3G (2 Mb/s) Advantages

Provides access to services and applications requiring thesehigher transmission rates

Extends capacity in zones where 3G is close to saturation

Microwave and millimeter wave bands to be used meansmaller cell size (a few to 1000 meters); 5 GHz band willbe first used with migration to higher carrier frequencies

Coverage not continuous, necessitating mobile units toroam between different bands and standards

40 A Comparison of WCDMA and MBS


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Parameter WCDMA MBS

Service area National coverage Localized and high traffic densityservice areas

Services Voice, video, and moderate-demand data applications

Voice, video, and high-demand dataapplications

User data rate Up to 2 Mb/s (slow motion or stationary)

Up to 150 Mb/s (impact of mobilespeed not yet known)

Connections Point-to-point & point-to-multipoint;asym. capabilities

Point-to-point & point-to-multipoint;asym. capabilities

Supporting networks Public (mobile and fixed), satellites,and private networks Public (mobile and fixed), satellites,and private networks

Terminals Hand portable or vehicle mounted,multimode, and multiband

Movable - hand or vehicle; single- &multimode; multiband



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Mobility Pedestrian and vehicles up to 500km/h

Pedestrian and vehicles up to 250km/h

Cell coverage range Up to a few kilometers outdoor;indoor pico cells may also be used

Up to 1 km outdoor; 100 m for indoenvironments

Link quality (BER) From 10-9 to 10-6 From 10-9 to 10-6

Transfer delay Less than 100 ms Less than 100 ms

Transmitted power Up to 33 dBm (2 W) Up to 33 dBm (2 W)

Frequency bands 1920-1980/2110-2170MHz (FDD)1900-1920/2010-2025 MHz TDD

5 and 17 GHz - indoor; 40 GHz -outdoor MBS; 60 GHz - WLANs

Transport technology ATM based IP based

42 Channel Characteristics and Impacts


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42 Channel Characteristics and Impacts

Characteristic Impact on Mobile Broadband Communications

High frequency bands Higher path losses limiting cell range for same radiated power

Multipath Delay spread = ISI; small scale fading; mitigate with diversity,equalization, coding, multicarrier modulation, directive antennas, etc.

Shadowing Due to obstacles; multiple BS visibility and fast handover may reduce

MT omni antennas Allow MT movement freedom; vulnerability to multipath and interf.

Space diversity recept. Combats small-scale fading; reqd complex RF front end = expense

PA nonlinearity & eff. Use modulation schemes that allow NL ampl. Increases efficiency

Modulation scheme Directly related to spectral efficiency; constant envelope desireable

Single carrier modul. Requires equalizer; operate with saturated PAs if modul. compatible

Multicarrier modul. Requires large processing power for FFT; requires linear PA

Chan. coding & interl. Fixed BW implies reduced bit rate; can be adaptive

ARQ mechanism Reduces BER at expense of increased system end-to-end delay

MT motion Induced Doppler shift impacts system performance

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Modul 12.a _te4103_new Version Wcdma