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GSM Mobile Services - Coggle Diagram
GSM Mobile Services
GSM Architecture
NSS (Network Switching Sub System)
GMSC
ISDN
PSDN
MSC
HLR
VLR
OSS (Operational Sub System)
AUC
OMC
EIR
RSS (Radio Sub System)
BSS
MS
UM
BSC
GPRS
Features
Always Online
Upgrade to existing System
Integral part of future 3G plans
Services
SMS service
Point to Point
Future Enhancements
Point to Multi point
Architecture
GGSN
SGSN
GSN
PDN
UMTS (Universal Mobile Tekecommunications Services)
UTRAN (UTRA Network)
RNS
RNC
Node B
IUB interface
CN (Core Network)
PS Domain
CS Domain
UE (User Equipment)
ME (Mobile Equipment)
USIM
GSM Security Services
A% stream cipher encryption
A8 cipher key generation
A3 Authentication
Services
Data Services or Bearer Services
Non-Transparent
Transparent
Telephony Services
Emergency Number
Multi numbering
SMS
Mobile Telephony
Supplementory Services
call redirection
Conference call
closed user group
Localization and Calling
Localization
MSISDN
IMSI
TMSI
MSRN
Calling
MOC (Mobile Original Call)
MTC (Mobile Terminated Call)
Handover
Defintiion
Types of handovers
Inter-cell, intra BSC
inter BSC, intra MSC
INtra-cell
inter MSC