Section: 5.1.3.2.1.4.4 5GMM-REGISTERED.ATTEMPTING-REGISTRATION-UPDATE
Content: The substate 5GMM-REGISTERED.ATTEMPTING-REGISTRATION-UPDATE is chosen by the UE if the registration procedure for mobility and periodic registration update failed due to a missing response from the network, or due to the circumstances described in subclauses 5.3.9, 5.5.1.3.5 and 5.5.1.3.7. No 5GMM procedure except registration procedure for mobility and periodic registration update (i.e. the 5GS registration type IE set to "mobility registration updating" or "periodic registration updating" in the REGISTRATION REQUEST message) and de-registration procedure, shall be initiated by the UE in this substate. No data shall be sent or received. NOTE 1: The registration procedure for mobility and periodic registration update over non-3GPP access can be triggered by, e.g. the change of S1 UE network capability or renegotiating some parameters. NOTE 2: This substate is entered irrespective whether: - the UE is camped on a cell which is in the registered PLMN, a PLMN from the list of equivalent PLMNs, or the registered SNPN, and the current TAI is not in the list of "allowed tracking areas"; or - the current TAI is in the list of "non-allowed tracking areas".