Overview of GSM and UMTS
 Architecture of GSM
 Architecture of UMTS
 Location of BSS division in GSM
and UMTS System
GSM-Global System for Mobile
Communications
FUNCTION OF GSM NODES
• MS - MOBILE STATION
Consist with ME - Mobile Equipment and SIM –
Subscriber Identity Mobile
Is used by subscriber to access the services provided by
Network
• BSS - Base Station Subsystem
Consist with BTS (Base Transceiver Station) and BSC
(Base Station Controller)
BTS – Include radio equipment (antennas, signal
processing devices and amplifiers), connect with MS
using air interface
FUNCTION OF GSM NODES
BSC – Manages the allocation of radio
channels, handover processes and BTS power
• NSS – Network and Switching Subsystem
MSC – Mobile Switching Center
HLR – Home Location Register
VLR – Visitor Location Register
EIR - equipment identity Register
AuC - Authentication Center
FUNCTION OF GSM NODES
MSC – Switching calls, controlling calls and
logging calls,
Interface with other PSTN (Public Switched
Telephone Network)
Mobility Management over the radio network
Radio recourse management and handover
between BSCs
Cont. FUNCTIONS OF GSM NODES
HLR – Is the database which stores the information about
subscribers such as: IMSI – International Mobile
Subscriber Identity, Subscribed services, a key for
authenticating the subscriber the current location of
subscriber
VLR - Is associated with each MSC in the network. When
a new subscriber roams into a location area, the VLR is
responsible for copying subscriber information from the
HLR to its local database.
.
FUNCTIONS OF GSM NODES
EIR - Is a database that stores the International
Mobile Equipment Identities (IMEI) of all the
mobile stations in the network
AuC – Is associated with HLR, and stores an
identity key for each mobile subscriber. This key
is used generate data for authenticate the IMSI
and to cipher communication over the radio path
UMTS – Universal Mobile
Telecommunication System
FUNCTION OF UMTS NODES
• UTRAN - UTMS terrestrial Radio Access
Network
Compound by RNC – Radio Network Controller
and NodeB
RNC- Performs functions that are equivalent
with the Base Station Controller (BSC) in GSM
NodeB - performs functions that are equivalent
to the base Transceiver station (BTS) functions
in GSM
FUNCTION OF UMTS NODES
• Core Network
SGSN – Serving GPRS Support Node Provides
Mobility Management, Session Management,
and Billing
GGSN – Gateway GPRS Support Node
Responsible for interconnection with other
external packet
LOCATION OF BSS DIVISION ON
SYSTEM
OVERVIEW OF BSS DIVISION
BSS System Movitel is composed by 3 Vendors:
Nokia, Huawei and ZTE
Operation and Maintenance server used:
Nokia - Netact
Huawei - M2000, U2000
ZTE - NetNumen
OVERVIEW OF BSS DIVISION
• 2G System
Vendor
Nokia
ZTE
HW
Province
MAC
MAP
GAZ
INH
SOF
MAN
TET
NIA
CAB
ZAM
NAC
NAM
MOC
OVERVIEW OF BSS DIVISION
• 3G System
Vendor
Nokia
HW
Province
MAC
MAP
GAZ
INH
SOF
MAN
TET
NIA
CAB
ZAM
NAC
NAM
MOC