11-04-2012, 05:03 PM
GLOBAL SYSYEM FOR MOBILES
[attachment=19945]
DEFINITION
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
GSM ARCHITECTURE
Mobile Station [MS]
Base Station Subsystem [BSS]
Network and switching subsystem [NSS]
MOBILE STATION
It includes
Mobile equipment [ME]
Subscriber identity module [SIM]
NETWORK AND SWITCHING SUBSTATION
NSS management consists of
Mobile service switching center
Interworking function [IWF]
Gateway MSC
GSM AND CDMA : A COMPARISION
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
[attachment=19945]
DEFINITION
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
GSM ARCHITECTURE
Mobile Station [MS]
Base Station Subsystem [BSS]
Network and switching subsystem [NSS]
MOBILE STATION
It includes
Mobile equipment [ME]
Subscriber identity module [SIM]
NETWORK AND SWITCHING SUBSTATION
NSS management consists of
Mobile service switching center
Interworking function [IWF]
Gateway MSC
GSM AND CDMA : A COMPARISION
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