4.4.1 General Description

29.3053GPPInterWorking Function (IWF) between MAP based and Diameter based interfacesRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

This interworking scenario is for S6a/S6d interface based on Diameter, S6a/S6d interface based on Diameter and SS7/MAP based roaming agreement with two IWFs in the path.

With this interworking scenario, two EPS operators can reuse the SS7 based roaming agreement.

This IWF scenario can only be an inter PLMN use case in which the two IWFs are in the VPLMN and HPLMN separately.

This interworking scenario is described as below:

Figure 4.4.1-1 S6a/S6d – S6a/S6d interworking scenario with two IWFs