GLOBAL SYSTEM FOR MOBILE BRIJESH KAUSHIK COMMUNICATIONS

INTRODUCTION TO GSM ARCHITECTUREa)BSS-MS,BTS,BSCb)NSS-MSC,GMSCOMSGPRS (2.5G) ORGANIZATIONS RELATED WITH GSM,3G INDIA’S FREQUENCY ALLOCAION PLAN

GMSK MODULATION

1710-1785 MHz

1805-1880 MHz

ARCHITECTURE OF GSM (2G) 9.6kbps

ARCHITECTURE OF GSM (2G)

ARCHITECTURE OF GSM (2G)

ARCHITECTURE OF GSM (2G)

ARCHITECTURE OF GSM (2G)

ARCHITECTURE OF GSM (2G)

ARCHITECTURE OF GSM (2G)

ME (Mobile Equipment)IMEI : 15 digits (*#06#)

SIM (Subscriber Identity Module) card

Serial no. – 19 digitsMSISDN : 12 digits(CC+NDC+SN) (1-3+ 12-14) 91xxxxxx37MSRNIMSI : 15 digitsSECRET KEY Ki - 128 bits SAME AS PRESENT IN AUTHENTICATION CENTRETMSI

BTS(Base Transceiver System)

COVERAGE AREA : 100M- 35KM

BSC(Base Station Controller)CALL HANDOVER

GMSC (Gateway Mobile Switching Centre)

BLACK LISTGREY LISTWHITE LIST

OMCROPERATION & MAINTENANCE CONTROL ROOM

ARCHITECTURE OF GPRS (2.5G) 35kbps-171kbps

i) 0-87.5 MHz is used for marine and aeronautical navigation, short and medium wave radio and cordless phones.ii) 87.5-108 MHz is used for FM radio broadcastsiii) 109- 173 MHz Used for Satellite communication, aeronautical navigation and outdoor broadcast vansiv) 230—450 MHz Used for Satellite communication and outdoor broadcast vans.v) 585-698 MHz Used for TV broadcastvi) 806-960 Used by GSM and CDMA mobile servicesvii) 960-1710 Aeronautical and space communicationviii) 1710- 1930 Used for GSM mobile servicesix) 1930-2010 – Used by defence forcesx) 2025-2110 – Satellite and space communicationsxi) 2170-2300 – Satellite and space communicationsxii) 2400- 2483.5 Used for Wi-Fi and Bluetooth short range servicesxiii) 2483.5-3300 Space communicationsivx) 3600-10000 Space research, radio navigationxv) 10000 – used for satellite downlink for broadcast and DTH services