Originating Identification presentation Restriction

In Release 15, the specifications for the Originating Identification Restriction (OIR) function were updated to clarify its behavior during communication forwarding and transfer scenarios, such as Communication Deflection (CD) and Explicit Communication Transfer (ECT). The release reinforced that the OIR service allows an originating party to withhold its identity, though certain terminating parties may override this restriction. Furthermore, it detailed the interoperability requirements for OIR with legacy circuit-switched networks like PSTN/ISDN, ensuring the restriction information is conveyed and takes precedence in cases of limited interworking.

• Terminating Identification Presentation (TIP) and Terminating Identification Restriction (TIR) using IP Multimedia (IM) Core Network (CN) subsystem TS 24.608CR0029
• Malicious Communication Identification (MCID) using IP Multimedia (IM) Core Network (CN) subsystem TS 24.616CR0026
• Update draft ref for Originating-CDIV param in P-Served-User TS 29.165CR0933
• Update draft ref for Originating-CDIV param in P-Served-User TS 29.165CR0966
• Update draft ref for Originating-CDIV param in P-Served-User TS 29.165CR0974

In Release 16, a key clarification was introduced for the OIR function regarding the usage restriction of the P-Asserted-Identity header field over the II-NNI interface. This provided more precise technical guidance on how originating identity restriction is to be handled at this specific network-to-network interface. The update helped ensure consistent application of the OIR service's withholding requirements during inter-network signaling.

• Clarification of the usage restriction of P-Asserted-Identity header field over the II-NNI. TS 29.165CR0990

In Release 17, the new development for the OIR function was the specification of OIP/OIR configuration for SNPN (Standalone Non-Public Network) operations. This addition defined how the Originating Identification Restriction service, which allows a caller to withhold their identity, functions within these isolated private network environments. The release ensures the core OIR requirements and its interactions with presentation services, as previously established, are maintained in the SNPN context.

• SNPN configuration for OIP/OIR TS 24.417CR0002

In Release 18, the specification for the OIR function was updated to define the procedure for the originating IMS Application Server when it receives a BDC (likely "Barring of Diverted Calls") establishment request. This addition provides specific handling instructions for this network trigger within the OIR framework, which governs when an originating party's identity can be withheld from presentation. The update integrates this procedural detail into the existing OIR service rules, which include override capabilities and interoperability with legacy circuit-switched networks.

• Procedure of originating IMS AS on receiving the BDC establishment request TS 24.186CR0018

In Release 19, the OIR function was enhanced to define its interaction with user RCD information and to specify the procedure for application data channel interworking via a DC AS for the originating UE. These updates provide a clearer framework for how identity restriction is managed alongside other user data and in modern network architectures.

• Procedure of application data channel interworking via DC AS for originating UE TS 24.186CR0065
• OIR interaction with user RCD information TS 24.607CR0059