l What
is GPRS?
[ General
Packet Radio Service
l Why
GPRS?
[ In
order to provide the data service out the scope of the fixed network
l GPRS
network classification
[ GSM
GPRS
[ UMTS
GPRS
l GPRS
network background
[ GSM
GPRS network reuse the existed GSM network
[ UMTS
GPRS network just change the RAN side
l Some
Abbreviation
[ GPRS:
General Packet Radio Service
[ BSS:
Base Station Subsystem
[ UTRAN:
UMTS Terrestrial Radio Access Network
[ SGSN:
Service GPRS Support Node
[ GGSN:
Gateway GPRS Support Node
[ CG:
Charging Gateway
[ BG:
Bordering Gateway
[ PDN:
Packet Data Network
l Some
Abbreviation
[ MSC/VLR:
Mobile Switch Center/Visitor Location Register
[ SMS-GMSC:
Gateway MSC For Short Message Service
[ SMS-IWMSC:
Short Message Service Interworking MSC
[ SCP:
Service Control Point
[ GMLC:
Gateway Mobile Location Center
[ HLR:
Home Location Register
[ EIR:
Equipment Identity Register
l Important
Entity Function __ SGSN
[ Mobility
management
l
The mobility management functions are used to
keep track of the current location of an MS within the PLMN or within another
PLMN.
[ Session
management
l
Session Management (SM) function manages the PDP
context of MS.
[ Routing
and transfer
l
SGSN performs routing and forwarding of service
data between MS and GGSN.
[ Charging
l
SGSN can generate, store, convert and send CDRs.
[ Lawful
Interception
[ NTP
l Important
Entity Function __ GGSN
[ Session
management
l
Session Management (SM) function manages the PDP
context of MS.
[ Routing
and transfer
l
GGSN performs routing and forwarding of service
data between MS and internet.
[ Charging
l
GGSN can generate, store, convert and send CDRs.
[ Dynamic
IP allocation
[ Service
management
l
Manage APN
l Important
Entity Function __ CG
[ Real-time
collection of GPRS bills
[ Temporary
storage and buffering of GPRS bills
[ Pre-processing
of GPRS bills
[ Sending
GPRS bills to the billing center
lImportant
Entity Function __ HLR/AUC
[Saving and updating GPRS subscriber subscription
data
[User authentication
[Providing location/routing
information and processing needed in mobility management and routing, for
example
−Saving
and updating user service SGSN
number and address
−GPRS
user location deletion indication
−Whether
MS is reachable
[Subscriber tracing (optional)
