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what's the difference between UMTS and WCDMA?

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Thinkid
what's the difference between UMTS and WCDMA?

UMTS and WCDMA,what's the difference? it has confused me for a long time ???

Edited by: admin on 05/16/2010 - 04:32
thuylt
Re: what's the difference between UMTS and WCDMA?

Thinkid wrote:
UMTS and WCDMA,what's the difference? it has confused me for a long time ???

UMTS: imply a case of 3G network, which uses WCDMA technology in radio access network and network structure shown in R99, R4, R5... (how many releases has been launched up to now? i'm not sure)
WCDMA: a radio access technology, may be used in other networks

pramod
Re: what's the difference between UMTS and WCDMA?

Hi
sorry for the delayed response
UMTS is the  high speed front end network to the existing voice and data n/w's.
where as WCDMA is the modulation scheme used within the UMTS radio access network.

dumbi
Re: what's the difference between UMTS and WCDMA?

TDMA is air interface of GSM, that is b/w the Mobile Station to BTS,CDMA is the Air interface of CDMA200,EVDO etc, while WCDMA is the Air interface of UMTS.
Note Um interface=Air interface=Radio access.

Dumbi
Nigeria

ruslani
Re: what's the difference between UMTS and WCDMA?

Ham Holma and Antti Toskala explain it in their book

Ham Holma,Antti Toskala, WCDMA FOR UMTS -Radio Access For Third Generation Mobile Communications, John Wiley & Sons.

erpervez
erpervez's picture
Hi Thinkid,UMTS refer to 3G

Hi Thinkid,UMTS refer to 3G technologu where as WCDMA is a Access technique on Air part which is CDMA. Here 'W' in WCDMA refers to wide having meaning of Broadband.Hope it'll clear your doubt.

harinder (not verified)
difference between UMTS and WCDMA

Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) mobile telecommunications technologies, which is also being developed into a 4G technology.UMTS also covers the radio access network (UMTS Terrestrial Radio Access Network, or UTRAN) and the core network (Mobile Application Part, or MAP), as well as authentication of users via USIM cards (Subscriber Identity Module).But W-CDMA (Wideband Code Division Multiple Access), UMTS-FDD, UTRA-FDD, or IMT-2000 CDMA Direct Spread is an air interface standard found in 3G mobile telecommunications networks. It is the basis of Japan's NTT DoCoMo's FOMA service and the most-commonly used member of the UMTS family and sometimes used as a synonym for UMTS.it uses the same core network as the 2G GSM networks deployed worldwide, allowing dual-mode operation along with GSM/EDGE; a feat it shares with other members of the UMTS family.

navneetkaur (not verified)
Hello, Thinkid Differnce between UMTS and WCDMA

Universal Mobile Telecommunications System(UMTS) is the successor of 2G (GSM) network specification in which much more consideration was given for higher data rates to support a variety of applications by mobile users. UMTS uses a totally different air interface for radio communications hence different from 2G in many ways and require specialized handsets for the new networks based on UMTS. WCDMA is the air interface technology being used in UMTS networks.
Wideband Code Division Multiple Access(WCDMA) is the multiple access technology being specified for UMTS radio access interface allowing subscribers to achieve more secured communication facility with much higher data rates. UMTS utilizing WCDMA in air interface has allowed broadband communication a reality so that people can have video conferences, high speed internet access, mobile gaming, and video streaming through the mobile terminal (User Equipment).

scorpion
scorpion's picture
UMTS is part of IMT-2000 of

UMTS is part of IMT-2000 of ITU under which it can use any of the many accepted Air-Interface technologies...while WCDMA one of them and the most popular.

Regards

Scorpion King - Returns
www.linkedin.com/in/scottreplund

kkamal
UMTS and WCDMA

UMTS stands for Universal Mobile communication system, typically used for 3G, while WCDMA stands for wideband code division multiple access, the technology used in 3G.

richard
UMTS and WCDMA

actually nothing but the name is different but in practical very limited engineer know that wcdma is one of th advance version of cdma and umts is just Universal Mobile communication system so that any one can use no commission of qaucms

My Favorite Blog :

http://www.teletopix.org

JimmyOliver
UMTS Vs W-CDMA

UMTS and WCDMA are terms related to 3G mobile communication. While UMTS refers to the 3G network specification, WCDMA is one of the radio access technologies for UMTS.

UMTS (Universal Mobile Telecommunications System):- This is the successor of 2G (GSM) network specification in which much more consideration was given for higher data rates to support a variety of applications by mobile users. UMTS uses a totally different air interface for radio communications hence different from 2G in many ways and require specialized handsets for the new networks based on UMTS.
WCDMA (Wideband CDMA):- This is the multiple access technology being specified for UMTS radio access interface allowing subscribers to achieve more secured communication facility with much higher data rates. UMTS utilizing WCDMA in air interface has allowed broadband communication a reality so that people can have video conferences, high speed internet access, mobile gaming, and video streaming through the mobile terminal (User Equipment).

Thanks,
Jimmy Oliver,
Professional Telecom Trainer
Telecom Training for Telcos