C M Y CM MY CY CMY K UMTS Protocols UMTS Entities WorldWorld ofof UMTSUMTS Entity Name Description Name 3GPP/ITU Standard Description AuC Authentication Center AAL-2 , ATM Adaptation Layer - Type 2 CBC Cell Broadcast Center AAL-5 ATM Adaptation Layer - Type 5 C-RNC Controlling work Controller ALCAP Access Link Control Application Part D-RNC Drift work Controller AMR Adaptive Multi Rate EIR Equipment Identity Register ATM Asynchronous Transfer Mode GGSN Gateway GPRS Support Node work Planes BMC Broadcast-Multicast Control GMSC Gateway MSC BSSAP+ Base Station System Application Part IP/PPP HLR Home Location Register CAMEL Customized Application for work Enhanced Logic MS Mobile Station (=UE) UTRAN Core CAP CAMEL Application Part MSC Mobile Switching Center CBS Cell Broadcast Service Node-B UMTS Base Station Non-Access Layer Control User Control User Plane Plane Plane Call Control RNS work Subsystem (RNC + Node-Bs) FP , , Frame Protocol SGSN Serving GPRS Support Node GMM GPRS Mobility Management SMSC Short Message Service Center GSMS , GPRS Short Message Service S-RNC Serving work Controller IP/PPP work Layer Control User Plane Plane GTP-C GPRS Tunneling Protocol - Control Plane UE User Equipment (=MS) IP
