UMTS is one of the third-generation (3G) mobile systems being developed within the International Telecommunications Union's IMT-2000 framework. UMTS is a global 3G system implemented with WCDMA technology.
Basic concepts of HSPA Efficient softswitchingEnhancing telecom managementIntroduction to IMSPrepaid postpaid convergent charging
Energy efficiency enhancements in radio access networksThird-generation radio access standards
