4.4.2 Network Deployments

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

This IWF scenario will apply the following network deployment situation:

– Users of a Pre Rel8 UMTS/GPRS/EPS for UTRAN/GERAN and E-UTRAN network access into a visited EPS with only E-UTRAN, which is described as below:

Figure 4.4.2-1 IWF Scenario three network deployment: visited EPS with E-UTRAN only, home EPS with E-UTRAN and UTRAN/GERAN and Pre Rel8 UMTS/GPRS

The subscription data for Pre Rel8 Gn/Gp SGSN, subscription data for SGSN and the subscription data for MME is downloaded to MME. MME picks up the subscription data for MME and discards the subscription data for Pre Rel8 UMTS/GPRS and the subscription data for SGSN.

– Users of a Pre Rel8 UMTS/GPRS/EPS for UTRAN/GERAN and E-UTRAN network access into a visited EPS with E-UTRAN and UTRAN/GERAN, which is described as below:

Figure 4.4.2-2 IWF Scenario three network deployment: visited EPS with E-UTRAN only and UTRAN/GERAN, home EPS with E-UTRAN and UTRAN/GERAN and Pre Rel8 UMTS/GPRS

The subscription data for Pre Rel8 Gn/Gp SGSN, subscription data for SGSN and the subscription data for MME is downloaded to SGSN or MME. SGSN or MME picks up the subscription data forSGSN or MME and discards the subscription data for Pre Rel8 UMTS/GPRS and the subscription data for MME or SGSN.

– Users of an EPS for UTRAN/GERAN and E-UTRAN network access into a visited EPS with only E-UTRAN, which is described as below:

Figure 4.4.2-3 IWF Scenario three network deployment: visited EPS with E-UTRAN only, home EPS with E-UTRAN and UTRAN/GERAN

The subscription data for SGSN and the subscription data for MME is downloaded to MME. MME picks up the subscription data for MME and discards the subscription data for the subscription data for SGSN.

– Users of an EPS for UTRAN/GERAN and E-UTRAN network access into a visited EPS with E-UTRAN and UTRAN/GERAN, which is described as below:

Figure 4.4.2-4 IWF Scenario three network deployment: visited EPS with E-UTRAN and UTRAN/GERAN, home EPS with E-UTRAN and UTRAN/GERAN

The subscription data for SGSN and the subscription data for MME is downloaded to SGSN or MME. SGSN or MME picks up the subscription data for SGSN or MME and discards the subscription data for MME or SGSN.

– Users of a Pre Rel8 UMTS/GPRS/EPS for E-UTRAN only network access into a visited EPS with only E-UTRAN, which is described as below:

Figure 4.4.2-5 IWF Scenario three network deployment: visited EPS with E-UTRAN only, home ESP with E-UTRAN only and Pre Rel8 UMTS/GPRS

The subscription data for Pre Rel8 Gn/Gp SGSN and the subscription data for MME is downloaded to MME. MME picks up the subscription data for MME and discards the subscription data for Pre Rel8 Gn/Gp SGSN.

NOTE: This IWF scenario can not be used for interworking between two EPS network with only E-UTRAN in which there in no MAP based roaming agreement to be reused.