Universal Mobile Telecommunications System, called UMTS (Universal Mobile Telecommunications System), UMTS as a complete 3G mobile communication technology standards, UMTS is not limited to define an air interface. In addition to WCDMA air interface technology as the preferred continuous improvement get outside, UMTS also have been introduced in the TD-SCDMA and HSDPA technology.
One kind of third-generation (3G) mobile phone technology. It uses WCDMA as the underlying standard by the 3GPP, and represents the European response to ITUIMT-2000 for 3G Cellular radio systems. UMTS is also sometimes called 3GSM, emphasizing the combination of 3G technology and the GSM standard follow-up criteria. UMTS packet switching system is being evolved by the GPRS system, so the architecture of the system is quite similar.
UMTS supports transfer rates of 1920 kbps (not often seen 2Mbps), but typically the highest rate of 384Kbps in reality only about high-load systems. Even so the data rate has been higher than the GSM error correcting data channel 14.4kbps or more consisting of 14.4 kbps HSCSD channel can really achieve price acceptable mobile WWW access and MMS. UMTS premise implementation is now widely used in GSM mobile telephone system, belonging to 2G technology. There is also a way evolution from 2G GPRS called. (Can be seen as 2.5G) GPRS support better data rate (theoretical maximum 140.8kbps, can actually achieve close 56Kbps), better than the connection-oriented data encapsulation. GPRS has been deployed in many GSM networks.
China Unicom's UMTS network upgrade to HSDPA, sometimes also called 3.5G. It can make a downlink transmission speed of 10Mbps.
UMTS has emphasized the possibility in the market for mobile video conference call to achieve, despite the fact that there are many promising service has not been tested to verify.
Other possible uses for UMTS music downloads and video telephony.
