User Data Convergence (UDC); User data repository access protocol over the Ud interface; Stage 3
The present document specifies the stage 3 of the Ud interface between the Front-Ends (FEs) and the User Data Repository (UDR) in the User Data Convergence (UDC architecture).
This 3GPP Technical Specification (TS) specifies the protocol and interactions between the FE and the UDR for Ud reference point, in particular:
- The details of the LDAP protocol that are to be considered
- The details of the SOAP envelope that provide support for subscriptions to notifications and notifications about data changes service (S/N operations).
The User Data Convergence Stage 2 description (architecture and information flows) is specified in 3GPP TS 23.335 [10].
The UDR data model used with LDAP (i.e. attributes, object classes and directory information tree) is implementation specific and is left outside the scope of 3GPP specifications. For multivendor interoperability between FEs and UDR specific integration projects are needed. Some examples of Ud data models are described in 3GPP TR 29.935 [19].