Section: 4.25.6 NIDD Authorization Update
Content: Figure 4.25.6-1 illustrates the procedure for updating or revoking an existing NIDD Authorization. The UDM may initiate the NIDD Authorization Update procedure with the NEF to send updated Authorization information to the NEF. Figure 4.25.6-1: NIDD Authorization Update procedure 0. UDM provided a successful authorization for a NIDD configuration request as defined in clause 4.25.3. The NIDD authorization is modified in UDM (e.g. subscription withdrawal, DNN used for NIDD service is removed from the UE subscription) before expiration of the NIDD Duration previously authorized. 1. The UDM sends an NIDD Authorization Update information using Nudm_NIDDAuthorisation_UpdateNotify Request (SUPI, GPSI, S-NSSAI, DNN, Result, Cause, NIDD Duration) message to the NEF to update an user's NIDD authorization. 2. The NEF sends Nudm_NIDDAuthorisation_UpdateNotify Response message to the UDM to acknowledge the authorization update. 3. If the authorization is removed, the NEF should initiate the SMF-NEF Connection release procedure as specified in clause 4.25.8. 4. The NEF informs the AF that the user's authorisation status has changed by sending Nnef_NIDDConfiguration_UpdateNotify Request (GPSI, TLTRI, Result, Cause, NIDD Duration) message to the AF to update a user's NIDD authorization. 5. The AF responds to the NEF with Nnef_NIDDConfiguration_UpdateNotify Response message.