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TS 29.128 (CT4)
MME and SGSN interfaces for interworking with
Packet Data Networks and Applications

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V15.5.0 (PDF)  2019/03  55 p.
V14.5.0  2017/12  53 p.
V13.5.0  2017/12  50 p.

Rapporteur:  Mr. Schmitt, Peter

The present document describes the Diameter-based interfaces between the SCEF/IWK-SCEF and other network entities such as MME/SGSN for the Architecture enhancements to facilitate communications with packet data networks and applications.

In particular, this document specifies the T6a interface between the MME and the SCEF, the T6ai interface between the MME and the IWK-SCEF, the T6b interface between the SGSN and the SCEF, the T6bi interface between the SGSN and the SCEF and the T7 interface between the SCEF and the IWK-SCEF. The procedures over those interfaces are defined in TS 23.682.