Teachers Name : Suman Sarker Telecommunication Technology Subject Name : Mobile & Wireless Communication-2 Subject Code : 9471 Semester :7th Department : Telecommunication Ideal Institute Of Science & Technology (IIST)

Lecture - 01 UMTS

UMTS Network Architecture UMTS combines three different air interfaces, GSM's Mobile Application Part (MAP) core, and the GSM family of speech codecs.GSMMobile Application Part

UMTS combines three different air interfaces, GSM's Mobile Application Part (MAP) core, and the GSM family of speech codecs. GSM Mobile Application Part Air interfaces[edit]edit UMTS provides several different terrestrial air interfaces, called UMTS Terrestrial Radio Access (UTRA). [3] All air interface options are part of ITU's IMT In the currently most popular variant for cellular mobile telephones, W-CDMA (IMT Direct Spread) is used. air interfaces [3] ITU IMT-2000

Please note that the terms W-CDMA, TD- CDMA and TD-SCDMA are misleading. While they suggest covering just a channel access method (namely a variant of CDMA), they are actually the common names for the whole air interface standards. [4] channel access method CDMA [4]

UMTS base station on the roof of a building

Handsets and modems

Migrating from GSM/GPRS to UMTS From a GSM/GPRS network, the following network elements can be reused: Home Location Register (HLR)Home Location Register Visitor Location Register (VLR)VLR Equipment Identity Register (EIR) Mobile Switching Center (MSC) (vendor dependent)Mobile Switching Center Authentication Center (AUC)Authentication Center Serving GPRS Support Node (SGSN) (vendor dependent)SGSN Gateway GPRS Support Node (GGSN)GGSN

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