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Join Aniket Dangi from EC-A 3rd Year in a seminar on Global System for Mobiles. Learn about GSM architecture, operation, history, and comparisons between GSM and CDMA technologies. Interactive session included!
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GLOBAL SYSYEM FOR MOBILES Presenter : ANIKET DANGI, EC-A 3rd YEAR
Derived from Groupe Spécial Mobile • Digital Cellular Telephone Technology • Based on TDMA • Operates on 900 MHz In India • Operates on 1800 MHz In Europe • Operates on 1900 MHz In USA DEFINITION
Developed by CEPT,a European group in June 1982 • Developed to offer • Pan-European roaming • Interaction with ISDN HISTORY
Mobile unit initialization • Mobile originated call • Network originated call • Call termination • Handoff procedure OPERATION OF CELLULAR SYSTEMS
Mobile Station [MS] • Base Station Subsystem [BSS] • Network and switching subsystem [NSS] GSM ARCHITECTURE
It includes • Mobile equipment [ME] • Subscriber identity module [SIM] MOBILE STATION A SIM for Bell Mobility (Canada)
It consists of • Base transceiver station • Base station controller • Transcoder rate adaption unit BASE STATION SUBSYSTEM OSS MS BSS NSS
NSS management consists of • Mobile service switching center • Interworking function [IWF] • Gateway MSC NETWORK AND SWITCHING SUBSTATION
It is divided into • Speech • It uses • Regular pulse excitation [RPE] • Linear prediction coding [LPE] • Data service • Modulation TRANSMISSION
Physical channels • TCH/F • TCH/H • TCH/8 • Logical channels • Common channels • Downlink channels • Uplink channels • Signaling channels GSM CHANNELS AND CHANNEL MODES
3G is the current GSM generation • Based on the International Telecommunication Union (ITU)standards • 3G uses .5 MHz channel carrier • Supports greater numbers of voice and data customers at lower cost GSM : CURRENT GENERATION
A GSM (TDMA) mobile has a SIM card, which provides more functionality • CDMA • high communication security • high carrier efficiency • smaller phones, low power requirement • Talk range • GSM : 35 km • CDMA : 110 km GSM AND CDMA : A COMPARISION