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High Level System Architecture (components (radio access network (UMTS…
High Level
System Architecture
components
core network
circuit switched (CS)
public switched
telephone networks (PSTNs)
mobile switching
centre (MSC)
gateway MSC (GMSC)
visitor location
register (VLR)
home location
register (HLR)
packet switched (PS)
.
authentication
center (AuC)
central database
packet data
network (PDNs)
Internet
serving GPRS
support node (SGSN)
gateway GPRS
support node (GGSN)
.
radio access network
UMTS terrestrial radio
access network (UTRAN)
Node B
UMTS
base station
.
radio network
controller (RNC)
lub interface
main functions
controlling RNC (CRNC)
serving RNC
(SRNC)
drift RNC (DRNC)
interface
lu-CS
lu-PS
soft handover
active set
base station
subsystem (BSS)
base station
controller (BSC)
base transceiver
station (BTS)
user equipment
mobile equipment
(ME)
mobile termination
(MT)
terminal equipment
(TE)
universal integrated
circuit card (UICC)
subscriber identity
module (SIM)
universal subscriber
identity module (USIM)
enhancements
release 5
IP multimedia
subsystem (IMS)
Home subscriber
server (HSS)
luFlex
release 4
bearer independent
circuit switched core
network
circuit switched
media gateway (CS-MGW)
GSM EDGE radio
access network (GERAN)
lur-g
release 6
wireless local
area network (WLAN)
interworking
WLAN access
gateway (WAG)
packet data
gateway (PDG)