UMTS combines three altered air interfaces, GSM's Adaptable Application Allotment (MAP) core, and the GSM ancestors of accent codecs.
Air interfaces
UMTS provides several altered earthbound air interfaces, alleged UMTS Earthbound Radio Admission (UTRA).3 All air interface options are allotment of ITU's IMT-2000. In the currently a lot of accepted alternative for cellular adaptable telephones, W-CDMA (IMT Direct Spread) is used.
Please agenda that the agreement W-CDMA, TD-CDMA and TD-SCDMA are misleading. While they advance accoutrement just a approach admission adjustment (namely a alternative of CDMA), they are in fact the accepted names for the accomplished air interface standards
Air interfaces
UMTS provides several altered earthbound air interfaces, alleged UMTS Earthbound Radio Admission (UTRA).3 All air interface options are allotment of ITU's IMT-2000. In the currently a lot of accepted alternative for cellular adaptable telephones, W-CDMA (IMT Direct Spread) is used.
Please agenda that the agreement W-CDMA, TD-CDMA and TD-SCDMA are misleading. While they advance accoutrement just a approach admission adjustment (namely a alternative of CDMA), they are in fact the accepted names for the accomplished air interface standards
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