12-10-2010, 03:19 PM
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UMTS A GLOBAL MOBILE SYSTEM
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
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
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.
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.
SPECIAL FEATURES OF UMTS
FOR USERS:
SPEED
ALWAYS ON CONNECTION
VALUE
AVAILABILITY
SUPPORTS BANDWIDTH INTENSIVE APPLICATION
GLOBAL ROAMING
QUALITY OF SERVICE
SECURITY
FOR OPERATORS:
EASY TO IMPLEMENT
SPECTRALLY EFFICIENT AND FLEXIBLE
VOLUME
RESEARCH AND DEVELOPENT
QUALITY CONTROL
FORWARD LOOKING DESIGN
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.
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
ADVANTAGES OVER GSM AND CDMA
SPEED
HIGH SPECTRAL EFFICIENCY
GLOBAL ROAMING
GOOD NETWORK COVERAGE
BETTER QUALITY OF SERVICE
SPEED
HIGH SPECTRAL EFFICIENCY
GLOBAL ROAMING
GOOD NETWORK COVERAGE
BETTER QUALITY OF SERVICE
APPLICATIONS OF UMTS
VPN
Java
Bluetooth
I-mode
Multimedia
M-commerce and e-commerce
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.
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.
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
UMTS A GLOBAL MOBILE SYSTEM
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
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
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.
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.
SPECIAL FEATURES OF UMTS
FOR USERS:
SPEED
ALWAYS ON CONNECTION
VALUE
AVAILABILITY
SUPPORTS BANDWIDTH INTENSIVE APPLICATION
GLOBAL ROAMING
QUALITY OF SERVICE
SECURITY
FOR OPERATORS:
EASY TO IMPLEMENT
SPECTRALLY EFFICIENT AND FLEXIBLE
VOLUME
RESEARCH AND DEVELOPENT
QUALITY CONTROL
FORWARD LOOKING DESIGN
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.
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
ADVANTAGES OVER GSM AND CDMA
SPEED
HIGH SPECTRAL EFFICIENCY
GLOBAL ROAMING
GOOD NETWORK COVERAGE
BETTER QUALITY OF SERVICE
SPEED
HIGH SPECTRAL EFFICIENCY
GLOBAL ROAMING
GOOD NETWORK COVERAGE
BETTER QUALITY OF SERVICE
APPLICATIONS OF UMTS
VPN
Java
Bluetooth
I-mode
Multimedia
M-commerce and e-commerce
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.
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.
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