UMTS

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UMTS

• (Universal Mobile Telecommunications System)

Telefónica Móviles España
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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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Convergence of media, data telecom
UMTS
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A new value chain
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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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UMTS Basic Architecture Release 99
ME
MS
Circuit Domain
BTS
BSC
GMSC
MSC/VLR
GSM BSS
HLR
UE
Node B
RNC
SGSN
GGSN
ME
UTRAN
Packet Domain
Radio Access Network
Core Network
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UMTS Basic Architecture Release 99

• 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.

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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.

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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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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.

RNS
RNC
RNC
Node B
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Spectrum allocation in Europe
A Node B can support FDD mode, TDD mode or
dual-mode operation.
UTRA UMTS Terrestrial Radio Access TDD Time
Division Duplex FDD Frecuency Division Duplex
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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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Core Network Domain

• The Core Network Domain is sub-divided into
• Serving Network Domain Represents functions that
  are local to the users 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 users 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.

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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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UMTS launching in TME

• 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)

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Links

• 3GPP
• www.3gpp.org
• UMTS Specifications
• http//www.3gpp.org/ftp/Specs
• UMTS Forum
• www.umts-forum.org

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