Telefónica Móviles España

UMTS(Universal Mobile Telecommunications

System)

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What is UMTS?• UMTS is one of the major new 'third generation'

(3G) mobile communications systems being developed within the framework defined by the ITU and known as IMT-2000.

• UMTS will enable the wireless Information Society, delivering high-value broadband information, commerce and entertainment services to mobile users via fixed, wireless and satellite networks.

• UMTS will speed convergence between telecommunications, IT, media and content industries to deliver new services and create fresh revenue-generating opportunities.

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UMTS advantages• Always-on

• Personalised

• Location aware

• Real-time and flexible

• Greater range of enriched multimedia services

• Higher data rates for a greater number of users

• Lower costs in long-term because of network efficiencies

• IP transport in access and core networks

• Separation of control and transport functionalities

• IP multimedia services for mobile devices

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Telecommunications

• Mobility• Circuit switching services• Packet switching services

UMTS

Internet

• Internet access• E-mail• Real-time images transfer• Multimedia documents

transfer

Contents• Video on-demand

• Interactive video services• Radio and television • Entertainment services• Location based services

Convergence of media, data & telecom

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A new value chain

MOBILE PORTAL

MOBILE NETWO

RK OPERAT

OR

SERVICES

PROVIDER

CONTENTS

PROVIDER

MOBILE INTERNET PROVIDE

R

Where will be each one?

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UMTS services forecast

• Simple and rich voice

• Location Based Services

• Business and consumer MMS

• Mobile Internet Access

• Mobile Intranet/Extranet Access

• Customised Infotainment

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UMTS General Architecture

UMTS basic architecture is split into:

• User equipment (UE): Equipment used by the

user to access UMTS services.

• Infrastructure: Physical nodes which perform

several functions required to terminate the

radio interface and to support the

telecommunications services requirements of

the users.

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Node B

UTRAN

UMTS Basic Architecture Release 99

GMSC

HLR

PSTN/ISDN

BTS

GSM BSS

RNC

BSCMSC/VLR

SGSN

Circuit Domain

Packet Domain

INTRANETS

GGSN

Other PLMN

INTERNET

Radio Access Network

Core Network

MS

UE

ME

ME

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UMTS architecture Release 99 is an evolution of GSM/GPRS system, with a new radio interface based on WCDMA technology, that allows to offer new services with high capacity.

Despite UMTS radio access network is new, UMTS core network is similar to GSM/GPRS core network.

UMTS core network is split into two different switching domains:

•Circuit switching (CS): Based on GSM model.

•Packet switching (PS): Based on GPRS model.

UMTS Basic Architecture Release 99

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User Equipment Domain

The user equipment is sub-divided into:

• Mobile Equipment Domain (ME): Performs radio transmission and contains applications. It consists of:– Mobile termination (MT): Radio transmission and

related functions.

– Terminal Equipment (TE): Contains end-to-end applications.

• User Identity Module Domain (USIM): Contains data and procedures which unambiguously and securely identify itself.USI

M

UE

MT

TE ME

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Infrastructure Domain

The Infrastructure Domain is split into:

• Access Network Domain: Consists of the physical entities which manage the resources of the access network and provides the user with a mechanism to access to Core Network Domain. In UMTS the access network is the UTRAN (Universal Terrestrial Radio Access Network).

• Core Network Domain: Consists of the physical entities which provide support for the network features and telecommunications services.

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Node B

Access Network Domain - UTRAN

UTRAN (Universal Terrestrial Radio Access Network) is the radio access network in UMTS.

UTRAN consists of a set of Radio Network Subsystems (RNS) connected to Core Network.

– A RNS consists of the Radio Network

Controller (RNC) and one or more Node

Bs. Each RNS is responsible for the

resources of its set of cells.

– RNC is responsible for the handover

decisions that require signalling to the UE. It

is equivalent to BSC in GSM network.

– Node B is responsible for radio

transmission/reception in one or more cells

to/from UE. It is equivalent to BTS in GSM

network.

RNC RNC

Node B

RNS

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Spectrum allocation in Europe

UMTS satellite

1850 1900 1950 2000 2050 2100 2150 2200 2250

15 20 60 30 15 60 30

MHz

GSM 1800 and DECT UMTS FDD

20/35 MHz for UTRA “unpaired”

2 x 60 MHzfor UTRA “paired”

UMTS TDD

UTRA: UMTS Terrestrial Radio AccessTDD: Time Division DuplexFDD: Frecuency Division Duplex

A Node B can support FDD mode, TDD mode or dual-mode operation.

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Radio access technology - WCDMA

• Wideband Code-Division Multiple-Access (W-CDMA) is one of

the main technologies for the implementation of third-generation

(3G) cellular systems.

• W-CDMA is based on CDMA, a digital multiple access technique

specified by the Telecommunications Industry Association (TIA) as

"IS-95.“

• In W-CDMA interface different users can simultaneously transmit

at different data rates and data rates can even vary in time.

• The radio access scheme is direct-sequence CDMA with information

spread over a bandwidth of about 5 MHz with a chip rate of

3.84 Mcps. Modulation is dual-channel QPSK.

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CDMA Technology

• CDMA (Code-Division Multiple-Access) is a "spread spectrum"

technology, which means that it spreads the information contained

in a particular signal of interest over a much greater bandwidth

than the original signal.

• With CDMA, unique digital codes, rather than separate RF

frequencies or channels, are used to differentiate subscribers. The

codes are shared by both the mobile station (cellular phone) and

the base station, and are called "pseudo-Random Code

Sequences." All users share the same range of radio spectrum.

• Because of the wide bandwidth of a spread spectrum signal, it is

very difficult to jam, difficult to interfere with, and difficult

to identify.

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Benefits of CDMA• Capacity increase.

• Improved call quality, with better and more consistent sound.

• Simplified system planning through the use of the same frequency in every sector of every cell.

• Enhanced privacy.

• Improved coverage characteristics, allowing for the possibility of fewer cell sites.

• Increased talk time for mobile devices.

• Bandwidth on demand.

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Core Network Domain

The Core Network Domain consists of the physical entities which provide support for the network features and telecommunications services. The support provided includes functionality such as:

• Management of user location.

• Control of network features and services.

• Transfer (switching and transmission) mechanisms for signalling and user generated information.

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The Core Network Domain is sub-divided into:• Serving Network Domain: Represents functions that

are local to the user’s access point and thus their location changes when the user moves. It is responsible for routing calls and for the transport of user data/information from source to destination.

• Home Network Domain: Represents functions that are conducted at a permanent location regardless of the location of the user’s access point. It contains at least permanently user specific data and is responsible for management of subscription information.

• Transit Network Domain: It is located on the communication path between the serving network domain and the remote party.

Core Network Domain

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UMTS security architecture

UMTS security architecture consists of the security features

and security mechanisms that assure the confidentiality,

integrity, authentication and anti-replay protection.

Five security features are defined:

• Network access security (I): Provides users with secure access to UMTS services, and which in particular protect against attacks on the (radio) access link.

• Network domain security (II): Enables nodes in the provider domain to securely exchange signalling data and protect against attacks on the wireline network.

• User domain security (III): Secures access to mobile stations.

• Application domain security (IV): Enables applications in the

user and in the provider domain to securely exchange messages.

• Visibility and configurability of security (V): Enables the user

to be

informed if a security feature is in operation or not.

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UMTS launching in TME

1 June 2002: Technical launching

• 750 base stations have been installed in 21 Spanish cities (16 cities with more than 250000 inhabitants + 4 cities of interest).

• Network equipment suppliers (Circuit Switching): Nortel and Ericsson.

• Technical tests of basic services over the network.

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Second semester 2003: Commercial launching

• The degree of madurity of 3G technology and the

standardization of operating platforms and systems

will determine the commercial launching of services.

• Besides it mainly depends on the availability of

terminals.

• The proposed basic packet of services consists of:

– Voice transmission

– Circuit-switching data transmission (64 kbps)

– Packet-switching data transmission (64 kbps)

– Handover (UMTS)

UMTS launching in TME

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Links

• 3GPPwww.3gpp.org

• UMTS Specificationshttp://www.3gpp.org/ftp/Specs

• UMTS Forumwww.umts-forum.org