What is Universal Mobile Telecommunications System (UMTS)?
The 3G standard proposed by the European Telecommunications Standards Institute (ETSI) with much joint work with Japanese standardization bodies is referred to as the universal mobile telecommunications system (UMTS). UMTS is one of a number of standards ratified by the International Telecommunications Union–Telecommunication Standardization Sector (ITU-T) under the umbrella of International Mobile Telephony 2000 (IMT2000).It provides an evolutionary path from GSM to achieve high speed data and higher capacity.
The UMTS standard is specified as a migration from the 2G GSM standard to UMTS via the general packet radio service (GPRS) and enhanced data rates for global evolution (EDGE) but different Radio Access Technology. UMTS uses a totally new CDMA-based Radio Access technology in the form of WCDMA in which 5 MHz channel is used as carrier. UMTS also supports multiple services, better quality of service(QoS) differentiation and higher data rates (up to 14 Mbps).
The UMTS standard is specified as a migration from the 2G GSM standard to UMTS via the general packet radio service (GPRS) and enhanced data rates for global evolution (EDGE) but different Radio Access Technology. UMTS uses a totally new CDMA-based Radio Access technology in the form of WCDMA in which 5 MHz channel is used as carrier. UMTS also supports multiple services, better quality of service(QoS) differentiation and higher data rates (up to 14 Mbps).
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| GSM evolution to UMTS |