Content for TR 23.973 Word version: 18.0.0
6 Solutions p. 8
6.1 Solution #1: Direct SBA UDM-HSS Interworking p. 8
6.1.1 Introduction p. 8
6.1.2 High-level Description p. 8
6.1.3 Services and Illustrated Procedures p. 9
6.1.4 Impacts on existing services and interfaces p. 10
6.1.5 Evaluation p. 10
6.2 Solution #2: UDM/HSS FE interaction reusing legacy protocol p. 10
6.2.1 Introduction p. 10
6.2.2 High-level Description p. 10
6.2.2.1 Authentication and Registration p. 10
6.2.2.2 IP address continuity of interworking without N26 from 5GS to EPS p. 11
6.2.2.3 T-ADS for IMS voice p. 12
6.2.2.4 Supporting IMS related procedures p. 13
6.2.2.5 SMS over NAS p. 14
6.2.3 Services and Illustrated Procedures p. 15
6.2.3.1 Authentication and Registration p. 15
6.2.3.2 IP address continuity of interworking without N26 from 5GS to EPS p. 17
6.2.3.3 T-ADS for IMS voice p. 18
6.2.3.4 Supporting IMS related procedures p. 19
6.2.3.5 SMSF address storage and retrieval p. 20
6.2.3.6 MT SMS domain selection p. 20
6.2.3.7 Messages-Waiting-Data handling p. 22
6.2.4 Impacts on existing services and interfaces p. 22
6.2.4.1 Authentication impacts p. 22
6.2.4.2 IP address continuity impacts p. 22
6.2.4.3 T-ADS for voice impacts p. 23
6.2.4.4 Supporting IMS related procedures p. 23
6.2.5 Evaluation p. 23
6.3 Solution #3: Deployment and coexistence without interworking between UDM and existing HSS p. 23
7 Conclusions p. 29
$ Change history p. 30
