Glossary
This glossary lists the abbreviations that this book uses, together with their expanded forms. The text spells out each abbreviation at its first use in each part and uses only the abbreviation after that, so a reader who starts in the middle of a part can look up an abbreviation here. 3GPP TR 21.905 defines the common vocabulary of the 3GPP specifications, and the specification that each chapter cites defines the abbreviations that are specific to one protocol or procedure.
| 3GPP |
Third Generation Partnership Project |
| 5G-EIR |
5G Equipment Identity Register |
| 5GC |
5G Core Network |
| 5GS |
5G System |
| AAA |
Authentication, Authorization, and Accounting |
| ADC |
Application Detection and Control |
| ADRF |
Analytics Data Repository Function |
| AF |
Application Function |
| AMBR |
Aggregate Maximum Bit Rate |
| AMF |
Access and Mobility Management Function |
| API |
Application Programming Interface |
| APN |
Access Point Name |
| APN-AMBR |
APN Aggregate Maximum Bit Rate |
| ARP |
Allocation and Retention Priority |
| AS |
Access Stratum |
| ASN.1 |
Abstract Syntax Notation One |
| AUSF |
Authentication Server Function |
| AUTN |
Authentication Token |
| AVP |
Attribute-Value Pair |
| BAR |
Buffering Action Rule |
| BCM |
Bearer Control Mode |
| BM-SC |
Broadcast Multicast Service Centre |
| BSS |
Base Station Subsystem |
| C-RNTI |
Cell Radio Network Temporary Identifier |
| CAMEL |
Customised Applications for Mobile network Enhanced Logic |
| CBC |
Cell Broadcast Centre |
| CCA |
Credit-Control-Answer (Diameter command) |
| CCR |
Credit-Control-Request (Diameter command) |
| CDR |
Charging Data Record |
| CGI |
Cell Global Identification |
| CHAP |
Challenge Handshake Authentication Protocol |
| CHF |
Charging Function |
| CIoT |
Cellular Internet of Things |
| CLA |
Cancel-Location-Answer (Diameter command) |
| CLR |
Cancel-Location-Request (Diameter command) |
| CN |
Core Network |
| CP |
Control Plane |
| CS |
Circuit-Switched |
| CSG |
Closed Subscriber Group |
| CUPS |
Control and User Plane Separation |
| DAPS |
Dual Active Protocol Stack |
| DCCF |
Data Collection Coordination Function |
| DCN |
Dedicated Core Network |
| DDN |
Downlink Data Notification (GTPv2-C message) |
| DN |
Data Network |
| DNS |
Domain Name System |
| DRB |
Data Radio Bearer |
| DRX |
Discontinuous Reception |
| DTI |
Direct Tunnel Indicator |
| DTM |
Dual Transfer Mode |
| E-CID |
Enhanced Cell-ID |
| E-RAB |
E-UTRAN Radio Access Bearer |
| E-SMLC |
Evolved Serving Mobile Location Centre |
| E-UTRA |
Evolved Universal Terrestrial Radio Access |
| E-UTRAN |
Evolved Universal Terrestrial Radio Access Network |
| EASDF |
Edge Application Server Discovery Function |
| EBI |
EPS Bearer Identity |
| ECA |
ME-Identity-Check-Answer (Diameter command) |
| ECGI |
E-UTRAN Cell Global Identifier |
| ECM |
EPS Connection Management |
| ECR |
ME-Identity-Check-Request (Diameter command) |
| EDGE |
Enhanced Data rates for GSM Evolution |
| eDRX |
Extended Discontinuous Reception |
| EEA0 |
EPS Encryption Algorithm 0 |
| EHPLMN |
Equivalent HPLMN |
| EIR |
Equipment Identity Register |
| eKSI |
Key Set Identifier for E-UTRAN |
| EMM |
EPS Mobility Management |
| eMPS |
Enhanced Multimedia Priority Service |
| EN-DC |
E-UTRA-NR Dual Connectivity |
| eNodeB, eNB |
E-UTRAN Node B |
| EP |
Elementary Procedure |
| EPC |
Evolved Packet Core |
| ePDG |
Evolved Packet Data Gateway |
| EPS |
Evolved Packet System |
| ESM |
EPS Session Management |
| ETSI |
European Telecommunications Standards Institute |
| F-TEID |
Fully Qualified Tunnel Endpoint Identifier |
| FAR |
Forwarding Action Rule |
| GBR |
Guaranteed Bit Rate |
| GERAN |
GSM EDGE Radio Access Network |
| GGSN |
Gateway GPRS Support Node |
| gNB |
NR Node B |
| GPRS |
General Packet Radio Service |
| GSM |
Global System for Mobile communications |
| GSN |
GPRS Support Node |
| GTP |
GPRS Tunnelling Protocol |
| GTP-C |
GTP for the control plane |
| GTP-U |
GTP for the user plane |
| GTPv0 |
GTP version 0 |
| GTPv1 |
GTP version 1 |
| GTPv1-C |
GTP version 1 for the control plane |
| GTPv1-U |
GTP version 1 for the user plane |
| GTPv2 |
GTP version 2 |
| GTPv2-C |
GTP version 2 for the control plane |
| GUMMEI |
Globally Unique MME Identifier |
| GUTI |
Globally Unique Temporary UE Identity |
| HFN |
Hyper Frame Number |
| HLR |
Home Location Register |
| HPLMN |
Home PLMN |
| HRPD |
High Rate Packet Data |
| HSS |
Home Subscriber Server |
| HTTP |
Hypertext Transfer Protocol |
| IDA |
Insert-Subscriber-Data-Answer (Diameter command) |
| IDR |
Insert-Subscriber-Data-Request (Diameter command) |
| IE |
Information Element |
| IETF |
Internet Engineering Task Force |
| IGMP |
Internet Group Management Protocol |
| IMEI |
International Mobile Equipment Identity |
| IMEISV |
International Mobile Equipment Identity and Software Version Number |
| IMS |
IP Multimedia Subsystem |
| IMSI |
International Mobile Subscriber Identity |
| IoT |
Internet of Things |
| IP |
Internet Protocol |
| IP-CAN |
IP Connectivity Access Network |
| ISR |
Idle mode Signalling Reduction |
| ITU-T |
International Telecommunication Union, Telecommunication Standardization Sector |
| KSI |
Key Set Identifier |
| KSI_ASME |
Key Set Identifier for the Access Security Management Entity |
| LAPI |
Low Access Priority Indicator |
| LBI |
Linked EPS Bearer Identity |
| LCI |
Load Control Information |
| LLC |
Logical Link Control |
| LPPa |
LTE Positioning Protocol Annex |
| LTE |
Long Term Evolution |
| MAC |
Medium Access Control |
| MAP |
Mobile Application Part |
| MBMS |
Multimedia Broadcast Multicast Service |
| MBR |
Maximum Bit Rate |
| MDT |
Minimization of Drive Tests |
| ME |
Mobile Equipment |
| MFAF |
Messaging Framework Adaptor Function |
| MLD |
Multicast Listener Discovery |
| MM |
Mobility Management |
| MME |
Mobility Management Entity |
| MNOP |
Measurement of Number of Packets |
| MNRG |
Mobile station Not Reachable for GPRS |
| MS |
Mobile Station |
| MSISDN |
Mobile Station International Subscriber Directory Number |
| NAS |
Non-Access Stratum |
| NAS-MAC |
NAS Message Authentication Code |
| NAS-PDU |
NAS Protocol Data Unit |
| NB-IoT |
Narrowband Internet of Things |
| NCC |
Next hop Chaining Counter |
| NEF |
Network Exposure Function |
| NF |
Network Function |
| NG-RAN |
Next Generation Radio Access Network |
| NGAP |
NG Application Protocol |
| NH |
Next Hop |
| NOA |
Notify-Answer (Diameter command) |
| NOR |
Notify-Request (Diameter command) |
| NR |
New Radio |
| NRF |
Network Repository Function |
| NSACF |
Network Slice Admission Control Function |
| NSAPI |
Network layer Service Access Point Identifier |
| NSSAAF |
Network Slice-specific and SNPN Authentication and Authorization Function |
| NSSF |
Network Slice Selection Function |
| NWDAF |
Network Data Analytics Function |
| OAM |
Operations, Administration, and Maintenance |
| OCI |
Overload Control Information |
| OCS |
Online Charging System |
| OFCS |
Offline Charging System |
| OTDOA |
Observed Time Difference Of Arrival |
| P-CSCF |
Proxy Call Session Control Function |
| P-GW, PGW |
PDN Gateway |
| P-TMSI |
Packet Temporary Mobile Subscriber Identity |
| PAA |
PDN Address Allocation |
| PAP |
Password Authentication Protocol |
| PCC |
Policy and Charging Control |
| PCEF |
Policy and Charging Enforcement Function |
| PCF |
Policy Control Function |
| PCO |
Protocol Configuration Options |
| PCRF |
Policy and Charging Rules Function |
| PDCP |
Packet Data Convergence Protocol |
| PDCP-SN |
PDCP Sequence Number |
| PDI |
Packet Detection Information |
| PDN |
Packet Data Network |
| PDP |
Packet Data Protocol |
| PDR |
Packet Detection Rule |
| PDU |
Protocol Data Unit |
| PEI |
Permanent Equipment Identifier |
| PER |
Packed Encoding Rules |
| PFCP |
Packet Forwarding Control Protocol |
| PFD |
Packet Flow Description |
| PGW-C |
PDN Gateway - Control Plane |
| PGW-U |
PDN Gateway - User Plane |
| PLMN |
Public Land Mobile Network |
| PMIP |
Proxy Mobile IP |
| ProSe |
Proximity-based Services |
| PS |
Packet-Switched |
| PSCell |
Primary SCG Cell |
| PSM |
Power Saving Mode |
| PTI |
Procedure Transaction Identity |
| PWS |
Public Warning System |
| QCI |
QoS Class Identifier |
| QER |
QoS Enforcement Rule |
| QoS |
Quality of Service |
| RAA |
Re-Auth-Answer (Diameter command) |
| RAB |
Radio Access Bearer |
| RADIUS |
Remote Authentication Dial-In User Service |
| RAI |
Routeing Area Identity |
| RAN |
Radio Access Network |
| RANAP |
Radio Access Network Application Part |
| RAND |
Random Challenge |
| RAR |
Re-Auth-Request (Diameter command) |
| RAT |
Radio Access Technology |
| RAU |
Routeing Area Update |
| RB |
Radio Bearer |
| RES |
Authentication Response |
| RFC |
Request for Comments |
| RIM |
RAN Information Management |
| RLC |
Radio Link Control |
| RNC |
Radio Network Controller |
| RNS |
Radio Network Subsystem |
| RRC |
Radio Resource Control |
| S-GW, SGW |
Serving Gateway |
| S-TMSI |
S-Temporary Mobile Subscriber Identity |
| S1AP |
S1 Application Protocol |
| SAE |
System Architecture Evolution |
| SAI |
Service Area Identifier |
| SAPI |
Service Access Point Identifier |
| SBI |
Service-Based Interface |
| SCG |
Secondary Cell Group |
| SCP |
Service Communication Proxy |
| SCTP |
Stream Control Transmission Protocol |
| SDF |
Service Data Flow |
| SDU |
Service Data Unit |
| SEID |
Session Endpoint Identifier |
| SGSN |
Serving GPRS Support Node |
| SGW-C |
Serving Gateway - Control Plane |
| SGW-U |
Serving Gateway - User Plane |
| SIM |
Subscriber Identity Module |
| SIPTO |
Selected IP Traffic Offload |
| SM |
Session Management |
| SMF |
Session Management Function |
| SMS |
Short Message Service |
| SNDCP |
Subnetwork Dependent Convergence Protocol |
| SNPN |
Standalone Non-Public Network |
| SON |
Self-Organizing Network |
| SRNS |
Serving Radio Network Subsystem |
| SRVCC |
Single Radio Voice Call Continuity |
| SS7 |
Signalling System No. 7 |
| TAI |
Tracking Area Identity |
| TAU |
Tracking Area Update |
| TCP |
Transmission Control Protocol |
| TDF |
Traffic Detection Function |
| TDF-C |
Traffic Detection Function - Control Plane |
| TDF-U |
Traffic Detection Function - User Plane |
| TEID |
Tunnel Endpoint Identifier |
| TFT |
Traffic Flow Template |
| TI |
Transaction Identifier |
| TLV |
Type-Length-Value |
| TMGI |
Temporary Mobile Group Identity |
| TMSI |
Temporary Mobile Subscriber Identity |
| TS |
Technical Specification |
| TSCTSF |
Time Sensitive Communication and Time Synchronization Function |
| TV |
Type-Value |
| TWAN |
Trusted WLAN Access Network |
| UCI |
User CSG Information |
| UCMF |
UE radio Capability Management Function |
| UDM |
Unified Data Management |
| UDP |
User Datagram Protocol |
| UDR |
Unified Data Repository |
| UDSF |
Unstructured Data Storage Function |
| UE |
User Equipment |
| UE-AMBR |
UE Aggregate Maximum Bit Rate |
| ULA |
Update-Location-Answer (Diameter command) |
| ULI |
User Location Information |
| ULR |
Update-Location-Request (Diameter command) |
| UMTS |
Universal Mobile Telecommunications System |
| UP |
User Plane |
| UPF |
User Plane Function |
| URR |
Usage Reporting Rule |
| USIM |
Universal Subscriber Identity Module |
| UTDOA |
Uplink Time Difference Of Arrival |
| UTRAN |
Universal Terrestrial Radio Access Network |
| VoLTE |
Voice over LTE |
| WLAN |
Wireless Local Area Network |
| X2AP |
X2 Application Protocol |
| XnAP |
Xn Application Protocol |