name: HONTRA
full_form: HOme Network TRiggered Authentication
context: This solution addresses the requirements of KI#1 Ability of the home network to trigger primary authentication. The solution addresses all the HONTRA use cases namely Interworking from EPS to 5GS, SoR/UPU counter wrap-around and AKMA KAF refresh. The solution addresses the interworking use case by proposing to follow the Nudm_UECM_Registration procedure and the error code that the UDM sends to the AMF. The solution addresses the SoR/UPU counter wrap around case by having the UDM initiate a HONTRA procedure when the UDM determines that the SoR/UPU counter is about to wrap around. The solution addresses the AKMA use case by providing the HN primary authentication configuration to the AAnF; the AAnF can then decide to set the KAF expiration time based on the HN primary authentication configuration so that a primary authentication happens before KAF expiration. The solution has impact on the UDM and AMF.
description: HONTRA is a procedure initiated by the Home Network to trigger primary authentication, addressing specific use cases such as interworking from EPS to 5GS, SoR/UPU counter wrap-around, and AKMA KAF refresh.
explanation: The text describes HONTRA as a procedure initiated by the Home Network to handle specific use cases. This implies a sequence of actions performed within the network.
section_title: 5.11.3	Evaluation
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biotag_Description: B-Procedure,O,O,O,O,O,O,B-Network,I-Network,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,O,O,B-Protocol,B-Parameter,O