The 5GS data storage architecture defined in TS 23.501
, for structured data, is used as the baseline network architecture.
The User Data Convergence concept specified in TS 23.335
, is used for reference to EPS/legacy system architecture for data storage, when layered architecture is deployed (i.e. application front-end decoupled from data repository using the standard interface Ud defined in TS 29.335
The Home Subscriber Server (HSS) architecture specified in clause 4.1.1 of TS 23.002
, is used for reference to EPS/legacy system architecture for data storage, when non-layered HSS architecture is deployed (i.e. monolithic deployment where user data are stored within the entity itself (or in an external entity via non-standard interfaces)).
In the UDC concept used for reference, HSS FE and EPS UDR defined in TS 23.335
are assumed to interact for any data required by the study: no standardization will be considered for the interface between HSS FE and EPS UDR.