UMTS A GLOBAL MOBILE SYSTEM

1
UMTSA GLOBAL MOBILE SYSTEM
2
TOPICS OF DISCUSSION

• WHAT IS UMTS
• BRIEF HISTORY OF UMTS
• TYPES OF UMTS SYSTEM
• SPECIAL FEATURES OF UMTS
• TECHNOLOGY BEHIND UMTS
• NETWORK STRUCTURE OF UMTS
• SPECTRUM OF UMTS
• ADVANTAGE OVER GSM AND CDMA
• APPLICATION OF UMTS
• UPGRADATION OF UMTS
• FUTURE ASPECTS OF UMTS

3
WHAT IS UMTS?

• UMTS is Universal Mobile Telecommunication
  System.
• It is one of the THIRD GENERATION(3G) mobile
  phone technology
• It is standardized by 3GPP, and is the European
  answer to the ITU IMT-2000 requirements for 3G
  cellular radio systems
• It is an evolution of GSM technology
• UMTS, the 3G successor to GSM which utilizes the
  W-CDMA air interface and GSM infrastructures .so
  it is also called 3GSM

4
HISTORY OF UMTS

• 1G networks (NMT, C-Nets, AMPS, TACS) are
  considered to be the first analog cellular
  systems, which started early 1980s.
• 2G networks (GSM, camion, DAMPS) are the first
  digital cellular systems launched early 1990s.
• 2.5G networks (GPRS, cdma2000 1x) with data rates
  up to about 144kbit/s.
• 3G networks (UMTS FDD and TDD, cdma2000 1x EVDO,
  cdma2000 3x, TD-SCDMA, EDGE, IMT-2000 DECT) are
  the latest cellular networks that have data rates
  384kbit/s and more.

5
CELLULAR TECHNOLOGY
6
TYPES OF UMTS SYSTEM

• There are two types of UMTS systems
• Frequency division duplex (FDD) wideband code
  division multiple access (FDD/WCDMA)
• And time division duplex (TDD) wideband code
  division multiple access (TDD/WCDMA). 
• FDD/WCDMA uses two frequencies, which allows
  separate transmission and reception on two
  different frequencies. 
• TDD/WCDMA allows for duplex transmission on the
  same frequency by assigning different time slots
  in a single frame for transmission and reception.

7
SPECIAL FEATURES OF UMTS

• FOR USERS
• SPEED
• ALWAYS ON CONNECTION
• VALUE
• AVAILABILITY
• SUPPORTS BANDWIDTH INTENSIVE APPLICATION
• GLOBAL ROAMING
• QUALITY OF SERVICE
• SECURITY

8
FOR OPERATORS

• EASY TO IMPLEMENT
• SPECTRALLY EFFICIENT AND FLEXIBLE
• VOLUME
• RESEARCH AND DEVELOPENT
• QUALITY CONTROL
• FORWARD LOOKING DESIGN

9
TECHNOLOGY

• UMTS combines the W-CDMA, TD-CDMA, or TD-SCDMA
  air interfaces, GSM Mobile Application Part (MAP)
  core, and the GSM family of speech codes.
• In the most popular cellular mobile telephone
  variant of UMTS, W-CDMA is currently used
• UMTS over W-CDMA uses a pair of 5 MHz channels.
  In contrast, the competing CDMA2000 system uses
  one or more arbitrary 1.25 MHz channels for each
  direction of communication.
• Uses spread spectrum technology. it assigns
  different codes to users as in CDMA.

10
(No Transcript)
11
UMTS CORE NETWORK
12
Packet switch domain
13
Description

• The network consists of
• Radio interface UTRAN
• Circuit switch domain
• Packet switch domain
• UTRAN umts terrestrial radio access
  network
• -Radio Network Controller (RNC),
• - 3G Base stations (Node Bs)
• - air interface (Tower) to the mobile
  equipment (ME)

14
NETWORK ELEMENTS
msc Mobile switching center switch Serves ME at its current location for circuit switch service
gmsc Gateway msc Serves umts where it is connected to ext CS nw
mgw Media gateway Performs actual switching for user data
sgsn Serving gprs support node Serves ME for packet data
ggsn Gateway serving gprs support node Connects packet switch nw to internet
Node b 3g base station Handles radio channel,multiplexing n demultilexing of data n voice
rnc Radio nw controller Controls n manages multiople base stations
15
UMTS SPECTRUM

• BANDWIDTH IS 5MHZ.
• SPECTRUM SPECIFIED BY WARC-92 IS
• 1900MHZ FOR UPLINK AND 2100MHZ FOR DOWNLINK
• Over 120 licenses have already been awarded to
  operators worldwide (as of December 2004),
  specifying W-CDMA radio access technology that
  builds on GSM

16
ADVANTAGES OVER GSM AND CDMA

• SPEED
• HIGH SPECTRAL EFFICIENCY
• GLOBAL ROAMING
• GOOD NETWORK COVERAGE
• BETTER QUALITY OF SERVICE

17
APPLICATIONS OF UMTS

• VPN
• Java
• Bluetooth
• I-mode
• Multimedia
• M-commerce and e-commerce

18
Upgradation of umts

• UMTS networks have been or are in the process of
  being upgraded with High Speed Downlink Packet
  Access (HSDPA), HSUPA (high speed uplink packet
  access) sometimes known as 3.5G which improves
  the speed up to 14mbps.
• HSDPA enables downlink transfer speeds of up to
  10 Mbit/s.
• HSUPA improves the uplink speed up to 5.76Mbps.

19
FUTURE ASPECT OF UMTS

• UMTS QoS mechanisms also can support Voice over
  Internet Protocol (VoIP), the final stage of the
  UMTS vision, where voice and data travel over the
  same packet infrastructure. That design reduces
  the need for, and cost of, a separate
  infrastructure for circuit-switched voice
• 3GPP Long Term Evolution project plans to move
  UMTS to 4G speeds of 100 Mbit/s down and 50
  Mbit/s up, using a next generation air interface
  technology based upon OFDM.

20
CRITICISM

• UMTS is criticized for its wide spectrum.
• Cost of license for its spectrum is very high
• Deployment of UMTS requires up gradation of
  existing GSM networks which is very costly
• UMTS network requires base station at every 100
  meters which is not possible in urban areas