Universal Mobile Telecommunications System (UMTS); LTE; Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol (V9.11.0; 3GPP TS 29.272 version 9.11.0 Release 9)
"The present document describes the Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related diameter-based interfaces towards the Home Subscriber Server (HSS)@ and the MME and the SGSN related diameter-based interface towards the Equipment Identity Register (EIR). This specification defines the Diameter application for the MME-HSS@ S6a reference point@ and for the SGSN-HSS@ S6d reference point. The interactions between the HSS and the MME/SGSN are specified@ including the signalling flows. This specification defines the Diameter application for the MME-EIR@ S13 reference point@ and for the SGSN-EIR@ S13' reference point. The interactions between the MME/SGSN and the EIR are specified@ including the signalling flows. In this specification@ if there is no specific indication@ the following principles apply: - ""SGSN"" refers to an SGSN which at least supports the S4 interface and may support Gn and Gp interfaces. - ""S4-SGSN"" refers to an SGSN which supports the S4 interface and does not support Gn and Gp interfaces. - Gn/Gp-SGSN refers to an SGSN which supports the Gn and Gp interfaces and does not support S4 interface. - ""GPRS subscription data"" refers to the parameters in the HLR column in Table 5.2. in 3GPP TS 23.008 [30]. - ""EPS subscription data"" refers to the parameters in the HSS column in Table 5.2A-1 in 3GPP TS 23.008 [30]. The Evolved Packet System stage 2 description (architecture and functional solutions) is specified in 3GPP TS 23.401 [2] and in 3GPP TS 23.060 [12]."