3GPP UMTS STANDARD

8/7/2019 3GPP UMTS STANDARD

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3GPP UMTS STANDARD

Jashan Kaur EC-10912020M.Tech ± I yr Punjabi University,Patiala



Generations

GSM Evolution Towards UMTS

IMT-2000

UMTSArchitecture

UMTS: FDD/TDD

UMTS : Switching

Major Interfaces in UMTS

UMT

Sin India

OVERVIEW



Evolution of Mobile Communications



1G ( FirstGeneration)

� Introduced in late 1970s

� Transmitted only analog voiceinformation.

� Large cells with wide range� Low infrastructure cost

� Small subscriber capacity

� High transmitter power

� Prominent 1G systems are

± Advanced Mobile TelephoneSystems ( AMTS)

± Nordic mobile telephone (NMT)

± Total Access communicationsystem (TACS)



2G (SecondGeneration)

Was implemented to improve Transmission quality,system capacity, and network coverage.

Digital communication was implemented due to

advancement in semiconductor technology. Provided supplementary services like fax, and short

messaging service.

2G systems include

GSM (

Global

System for Mobile communications)

D-AMPS (Digital AMPS)

CDMA (Code Division Multiple Access )

PDC (Personal Digital Communication)



2.5Generation

2.5 is a stepping-stone between 2G and 3G cellular

wireless technologies,

2.5 G systems

GPR S (General Packet Radio Service)

HSCSD (High Speed Ckt Switched Data)

EDGE (Enhanced Data rates for GSM evolution )



3G (ThirdGeneration)

3G provide the ability to transfer

both voice data and non-voice data .

High Data Rates

3G systems

UMTS (Universal Mobile

Telecommunications System)

CDMA 2000 ( Code Division Multipleaccess)

TD-SCDMA (Time Division

Synchronous CDMA)



Comparision

1G 2G 2.5G 3G 3.5G 4G

Speeds n/a <20Kbps 30Kbps to

90Kbps

144Kbps to

2Mbps

384Kbps to

14.4Mbps

100Mbps to 1Gbps

Features Analog

(voice

only)

Voice; SMS;

conference calls;

caller ID; PTT

MMS; Images;

Web browsing;

Short audio

video clips;

games; apps;

Ring tone

downloads

Full motion

video;

streaming

music; 3D

gaming; faster

Web browsing

On-demand video;

video conferencing

High-quality

streaming video, HQ

video conferencing;

VOIP telephony

Technology AMPS GSM CDMA iDen GPRS 1xRTT

EDGE

UMTS 1xEV-DO HSPDA 1x-EV-DV WiMax

Time 1980 1990 1995 1995 2000 2000 2005 2005 + TBA



UNIVER SAL MOBILE

TELECOMMUNICATION SYSTEM(UMTS)



Definition

³UMTS is a mobile communication system that can offer

significant user benefits including high-quality wireless

multimedia services to a convergent network of fixed,

cellular and satellite components.

It delivers information directly to users and provide them

with access to new and innovative services and

applications.

It offers mobile personalized communications to the massmarket regardless of location, network and terminal

used´.

- umts forum



GSM Evolution Towards UMTS

Evolution of GSM towards UMTS can be explained in terms of

³generations´:

T he entire cellular systems since

introduced has effectively been

replaced at times.

T hese major changes are referred to

as a new ³generation´ of cellular systems.



IMT-2000

* A global standard for (3G) wireless communicationdefined by ITU

* UMTS is being developed by Third Generation

Partnership project (3GPP)Features

Seamless transition from 2G to 3G

High data rate

High speech quality Channel Switching & Packet Switching transfer

High spectrum efficiency

Global availabilty



Different Environments for UMTS

Global

Suburban

Macro-Cell

Urban

Micro-CellIn- Building

Pico-Cell

Home-Cell



Support system inUMTS

Services supported by the UMTS core network include:

1) Voice

2)U

niversal messaging (integrated email, voicemail,S

MS

)3) Video4) Wireless internet access5) File transfer

Interworking is supported to:

1) PSTN2) GSM3) N-ISDN4) IP



UMTSArchitecture



Main Constituents

- User equipment UE( Mobile

Station )

- Radio AccessNetwork (RAN)(Basestation

subsystem)

- Core network.



Interface between different Function

Blocks



Detailed Architecture



UE (User Equipment )

UE = USIM + ME

UE consists of :

Display and User Interface

User specific information

Authentication Algorithms and keys

User End Termination of the Air Interface

Protocol Stack for Radio Interface



RAN ( Radio Access Network)

� Interfaces to UE and CN

� 2 Parts

* Node B

* Radio Network

Controller

(RNC)



Tasks of Node B

Physical unit for Rx/Tx with cells

Connects to UE via the W±CDMAUu radiointerface

Connects to RNC via the Iub ATM interface

Modes of operation : FDD, TDD , Dual

Node B is the ATM termination point

Measures connection quality and strength

Power control



Core Network

Home Location Register (HLR) : Database storing the

master copy of a users profile

Visitor Location Register (VLR) : Database holding a

copy of a visiting users profile

Mobile Switching Centre (MSC): Switch for Circuit

Switched Services

Gateway MSC (GMSC) : interface to external networks

Serving GPRS Support Node (SGSN) : Router for Packet

Switched Services

Gateway GPRS Support Node (GGSN) : gateway to

other packet data networks



Location Management

VLR divided into Location

Areas

Each LA is divided intoRouting areas, controlled by

the SGSN

RA is divided into UTRAN

Routing Areas (URA), which

are tracked by the RNC



Major Interfaces inUMTS

� There are four major new

interfaces defined in UMTS

� Iu

between RAN - CN

� Iur

between RNCs

� Iub

between Node B - RNC

� Uu

The air interface



Switching



Circuit Switching



Packet Switching



Routing by Incoming Call (CS)



Routing by Packet Switching ( PS )



UMTSModes

UMTS

UMTS-FDD UMTS-TDD



UMTS FDD (WCDMA)

� Built onto enhanced GSM core network

� Utilises:

� QPSK modulation� Multiple channel coding and bearer rates

� Variable spreading factors and multi-code transmission

� CDMA

� FDD

� Data up to rates of 2Mbps



UMTSTDD (TD-CDMA)

* Built onto enhanced GSM corenetwork

* Utilises:

� QPSK modulation

� Multiple channel coding andbearer rates

� CDMA� TDD

* Data up to rates of 2Mbps



Multiple Access Technique in UMTS

Major difference is air interface

± GSM: TDMA and FDMA

± UMTS:Wide-band code division multiple

access (WCDMA)



Frequency

Uplink Frequency: 1885- 2025 MHZ

Downlink Frequency: 2110- 2200 MHz

The channels are spaced by 5MHz.

The downlink uses QPSK for all transport channels.

Uplink uses two separate channels so that the cycling of the

transmitter on or off does not cause interference to the audio lines.



Problems withUMTS

Interference is the biggest problem in WCDMA

and need to control, this can be done through

Optimisation of

� Site Location and configuration

� Height, direction, beamwidth and tilt of antennas

� Cable losses

� Mast head amplifiers



Advantages over

previousGenerations

UMTS is a successor to 2G based GSM technologiesincluding GPR S and EDGE.

Support 2Mbit/s data rates. Higher Data rates at lower incremental costs.

Benefits of automatic international roaming plusintegral security and billing functions, allowingoperators to migrate from 2G to 3G while retaining

many of their existing back-office systems Gives operators the flexibility to introduce new

multimedia services to business users and consumers

This not only gives user a useful phone but alsotranslates higher revenues for the operator.



Applications

Conversational Class applications:

Circuit switched voice service and Packet Switched VoicedService

Streaming Class applications:

Streaming / Download (Video, Audio) Videoconferences.

Interactive Class applications: Fast Internet / Intranet. Mobile E-Commerce (M-Commerce) Remote Login

Background Class applications: Any non ±real time applications likeMultimedia-Messaging, E-Mail

Mobile Entertainment (Games)



UMTS in India

BSNL & MTNL are the first in India to be

able to provide with 3G UMTS

Features available :* USIM

* speed upto 384kbps

* video calling* mobile TV(etc)



References

Mobile Communication by Jochen Schiller

UMTS : The Fundamentals by B. Walke

www.iec.org www.umtsforum.com

www.radio-electronics.com



THANK YOU

3GPP UMTS STANDARD

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