3GPP UMTS STANDARD
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Transcript of 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
8/7/2019 3GPP UMTS STANDARD
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Generations
GSM Evolution Towards UMTS
IMT-2000
UMTSArchitecture
UMTS: FDD/TDD
UMTS : Switching
Major Interfaces in UMTS
UMT
Sin India
OVERVIEW
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Evolution of Mobile Communications
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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)
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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)
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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 )
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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)
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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
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UNIVER SAL MOBILE
TELECOMMUNICATION SYSTEM(UMTS)
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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
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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.
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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
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Different Environments for UMTS
Global
Suburban
Macro-Cell
Urban
Micro-CellIn- Building
Pico-Cell
Home-Cell
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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
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UMTSArchitecture
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Main Constituents
- User equipment UE( Mobile
Station )
- Radio AccessNetwork (RAN)(Basestation
subsystem)
- Core network.
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Interface between different Function
Blocks
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Detailed Architecture
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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
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RAN ( Radio Access Network)
� Interfaces to UE and CN
� 2 Parts
* Node B
* Radio Network
Controller
(RNC)
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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
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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
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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
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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
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Switching
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Circuit Switching
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Packet Switching
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Routing by Incoming Call (CS)
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Routing by Packet Switching ( PS )
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UMTSModes
UMTS
UMTS-FDD UMTS-TDD
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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
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UMTSTDD (TD-CDMA)
* Built onto enhanced GSM corenetwork
* Utilises:
� QPSK modulation
� Multiple channel coding andbearer rates
� CDMA� TDD
* Data up to rates of 2Mbps
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Multiple Access Technique in UMTS
Major difference is air interface
± GSM: TDMA and FDMA
± UMTS:Wide-band code division multiple
access (WCDMA)
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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.
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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
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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.
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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)
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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)
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References
Mobile Communication by Jochen Schiller
UMTS : The Fundamentals by B. Walke
www.iec.org www.umtsforum.com
www.radio-electronics.com
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THANK YOU