Diameter Interfaces
| Interface | Meaning | Standard |
|---|---|---|
| BP | Base Protocol | RFC 6733 |
| Cx | 3GPP user's data management interface (in IMS between CSCF and HSS) | TS 29.229 |
| Dh | 3GPP user's data management interface between the AS and the SLF | TS 29.328 TS 29.329 |
| Diameter EAP | Diameter Extensible Authentication Protocol (EAP) Application | RFC 4072 |
| Dx | 3GPP user's data management interface between the CSCF and the SLF | TS 29.229 |
| e2 | Policy management interface between the Connectivity Session Location and Repository Function (CLF) and an Application Function (AF) in the TISPAN Architecture | ES 283.035 |
| e4 | Policy management interface between the Connectivity Session Location and Repository Function (CLF) and the RACS in the TISPAN Architecture | ES 283.034 |
| Gi | Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN) | TS 29.061 |
| Gq | 3GPP policy management interface between PDF and AF in the IMS architecture | TS 29.209 |
| Gq' | Policy management interface between Service Policy Decision Function (SPDF) and AF in the TISPAN Architecture | TS 183.017 |
| Gx | 3GPP provisioning interface between the Policy and Charging Rules Function (PCRF) and the Policy and Charging Enforcement Function (PCEF) | TS 29.212 |
| Gxx | 3GPP interface allowing for a PCRF to have a dynamic control over the Bearer Binding and Event Report Function (BBERF) behaviour | TS 29.212 |
| Gy | 3GPP Online charging interface between a PCEF and an OCS | TS 32.240 TS 32.299 |
| H2 | 3GPP interface between the 3GPP AAA Server and the HA. It is used to transport authentication, authorization and charging-related information in a secure manner | TS 29.273 |
| NASREQ | Diameter Network Access Server Application | RFC 4005 |
| Ph | 3GPP interface between the Presence Network Agent and the HSS | TS 29.328 TS 29.329 |
| Px | 3GPP interface between the Presentity presence proxy and the HSS | TS 29.229 |
| Rf | 3GPP Offline Accounting, i.e a charging method which does not affect, the rendered service in real-time | TS 32.299 |
| Ro | 3GPP Online Accounting, i.e. a charging method which is able to control the rendered service in real-time | TS 32.240 TS 32.299 |
| Rx | 3GPP Policy and Charging Control interface | TS 29.214 |
| SCAP | Ericsson's Service Charging Application Protocol | Ericsson CCN |
| S6a | 3GPP interface enabling the transfer of subscriber related data between the MME and the HSS | TS 29.272 |
| S6b | 3GPP interface between the 3GPP AAA Server and the PDN-GW. It is used to authenticate and authorize the UE, and update the PDN-GW address to the 3GPP AAA server and HSS | TS 29.273 |
| S6c | Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs) | TS 29.338 |
| S6d | 3GPP interface enabling the transfer of subscriber related data between the SGSN and the HSS | TS 29.272 |
| S6m | Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications | TS 29.336 |
| S6n | Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications | TS 29.336 |
| S6t | Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications | TS 29.336 |
| S7a | Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol | TS 29.272 |
| S7d | Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol | TS 29.272 |
| S9 | 3GPP interface between a HPLMN and a VPLMN for roaming scenarios. | TS 29.215 |
| S13 | 3GPP interface enabling the ME Identity check procedure between the MME and the EIR | TS 29.272 |
| S13' | 3GPP interface enabling the ME Identity check procedure between the SGSN and the EIR | TS 29.272 |
| S15 | 3GPP interface enabling provisioning and removal of dynamic QoS rules between the HNB GW and the PCRF and between the HNB GW and the V-PCRF | TS 29.212 |
| Sd | 3GPP interface between the PCRF and the TDF. It is used for the management of TDF sessions | TS 29.212 |
| SGd | Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs) | TS 29.338 |
| Sgi | Interworking between the Public Land Mobile Network (PLMN) supporting packet based services and Packet Data Networks (PDN) | TS 29.061 |
| Sh | 3GPP user's data management interface between AS and HSS in the IMS architecture | TS 29.328 TS 29.329 |
| SLg | Location Services (LCS); Evolved Packet Core (EPC) LCS Protocol (ELP) between the Gateway Mobile Location Centre (GMLC) and the Mobile Management Entity (MME) | TS 29.172 |
| SLh | Location Services (LCS); Diameter-based SLh interface for Control Plane LCS | TS 29.173 |
| STa | 3GPP interface between a non-3GPP IP access network and the 3GPP AAA Server or between a non-3GPP IP access network and the 3GPP AAA Proxy. It is used to authenticate and authorize the UE | TS 29.273 |
| SWa | 3GPP interface between the untrusted non-3GPP IP access and the 3GPP AAA Server or Proxy. It is optionally used to authenticate and authorize the UE for the access to the EPS | TS 29.273 |
| SWd | 3GPP interface between the 3GPP AAA Proxy and 3GPP AAA Server. It is used to transport AAA messages | TS 29.273 |
| SWm | 3GPP interface is between the ePDG and the 3GPP AAA Server or between the ePDG and the 3GPP AAA Proxy. It is used to authenticate and authorize the UE | TS 29.273 |
| SWx | 3GPP interface between the 3GPP AAA Server and the HSS. It is used to authorize the UE and to transport PMIPv6 related mobility parameters in the chained tunnel cases | TS 29.273 |
| Sy | 3GPP interface enabling transfer of policy counter status information relating to subscriber spending from OCS to PCRF | TS 29.219 |
| T4 | Diameter-based T4 interface for communications with packet data networks and applications | TS 29.337 |
| T6a | Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications | TS 29.128 |
| T6b | Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications | TS 29.128 |
| T6ai | Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications | TS 29.128 |
| T6bi | Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications | TS 29.128 |
| T7 | Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) interfaces for interworking with packet data networks and applications | TS 29.128 |
| Tsp | Tsp interface protocol between the MTC Interworking Function (MTC-IWF) and Service Capability Server (SCS) | TS 29.368 |
| Tx | 3GPP2 interface between an Application Function (AF) and a Policy and Charging Rules Function (PCRF) in support of Service Based Bearer Control | X.S0013.013-0 |
| V4 | V2X Control Function to Home Subscriber Server (HSS) aspects (V4); Stage 3 | TS 29.388 |
| Zh | 3GPP bootstrapping interface between the BSF and the HSS | TS 29.109 |
| Zh' | 3GPP bootstrapping interface between the BSF and the HLR | TS 29.109 |
| Zn | 3GPP GAA applications interface between the BSF and the NAF | TS 29.109 |
| Zpn | 3GPP GBA push nterface between the BSF and the NAF | TS 29.109 |