UTRA - significado y definición. Qué es UTRA
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Qué (quién) es UTRA - definición

THIRD GENERATION MOBILE CELLULAR SYSTEM FOR NETWORKS
UMTS (telecommunication); W-CDMA; TD-SCDMA; WCDMA; Universal Mobile Telephone System; Umts; UMTS-TDD; TD-CDMA; UTRA TDD-HCR; Wideband Code Division Multiple Access; Wideband CDMA; TDSCDMA; Time Division-Synchronous Code Division Multiple Access; Time Division Synchronous Code Division Multiple Access; UTRA-TDD HCR; UTRA-TDD LCR; UTRA TDD-LCR; UTRA; UMTS-FDD; UARFCN; TD SCDMA; Wideband code division multiple access; Universal mobile telecommunications system; List of TD-SCDMA networks; Universal Mobile Telecommunications System; UTRA-TDD; Uu interface
  • 3G sign shown in notification bar on an Android powered smartphone
  • UMTS base station on the roof of a building
  • UMTS network architecture
  • UMTS network architecture

WCDMA         
??? Code Division Multiple Access (Reference: mobile-systems)

Wikipedia

UMTS

The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard. Developed and maintained by the 3GPP (3rd Generation Partnership Project), UMTS is a component of the International Telecommunication Union IMT-2000 standard set and compares with the CDMA2000 standard set for networks based on the competing cdmaOne technology. UMTS uses wideband code-division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators.

UMTS specifies a complete network system, which includes the radio access network (UMTS Terrestrial Radio Access Network, or UTRAN), the core network (Mobile Application Part, or MAP) and the authentication of users via SIM (subscriber identity module) cards.

The technology described in UMTS is sometimes also referred to as Freedom of Mobile Multimedia Access (FOMA) or 3GSM.

Unlike EDGE (IMT Single-Carrier, based on GSM) and CDMA2000 (IMT Multi-Carrier), UMTS requires new base stations and new frequency allocations.

Ejemplos de uso de UTRA
1. More than 30 other people in the wedding party were injured late Saturday night in Jhok Utra, a village about 2'0 miles southwest of the capital Islamabad, area police officer Khadim Hussain Khadim said.
2. Azhar Masood & Agencies ISLAMABAD, 18 December 2006 — Twenty–seven people, including the bride, were killed and 30 others were injured when tragedy struck a wedding party in a central Pakistani town yesterday, sources said. «A fire broke out in a tent at a marriage party in the town of Jhok Utra, 20 km west of Dera Ghazi Khan, triggering a stampede and wall collapse that killed 27 women and children,» said area police officer Khadim Hussain Khadim. «The bride was among the dead.» A high–powered electric light apparently sparked the fire in the large canvas tent where more than 100 women and children, many singing wedding songs, were present, Khadim said.