Gsm Global System For Mobile Comm[1]. Really Nice

INTRODUCTION TO CELLULAR TECHNOLOGY GSM-GLOBAL SYSTEM FOR MOBILE COMMUNICATION RAHUL GUPTA

MOBILTY THE MAGIC WORD ,[object Object],[object Object]

GSM: GLOBAL SYSTEM FOR MOBILE COMMUNICATION ,[object Object],[object Object]

EVOLUTION OF MOBILE TELEPHONE SYSTEMS

PCS-United States 1996 CDMA 1995 GPRS 2003 PCS-1900 1995 Personal digital cellular 1994 Digital cellular system 1992 GSM 1991 American digital cellular 1991 Nordic mobile technology 1986 Total access communication system 1985 American mobile telephone system 1983 Nordic mobile telephone 1981 MOBILE SYSTEM YEAR

GSM-NETWORK ARCHITECTURE Mobile station

Mobile station ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Base station subsystem(BSS) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Network & switching subsystem(SS) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

INTERFACES & PROTOCOLS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

OSI ARCHITECTURE PSTN PSPDN ISDN Um Abis A MS BTS BSC MSC

The air interface Um ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],ITU (international telecommunication union) has allocated following bands: GSM 900: uplink : 890-915 MHz downlink:935-960 MHz GSM 1800: uplink : 1710-1785 MHz downlink:1805-1880 MHz * TDMADMA scheme * BURST – fundamental unit in the TDMA scheme

Protocols on the air interface ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

System features ,[object Object],[object Object],[object Object],[object Object],[object Object]

User identity & authentication

GSM –SUBSCRIBER SERVICES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

GSM V/S CDMA 127 MILLION USERS 456 MILLION USERS INTERNATIONAL ROAMING 64-140kbps 56 kbps DATA RATE SOFT MAKE BEFORE BREAK HARD BREAK BEFORE MAKE HANDOVER SPREAD SPECTRUM TECHNOLOGY FDMATDMA TECHNOLOGY USED CDMA GSM PARAMETERS

[object Object],[object Object]

Gsm Global System For Mobile Comm[1]. Really Nice

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