Periodic registration update procedure for non-allowed service areas
A user equipment (UE) that initiates a periodic update timer, wherein the UE is configured to perform a periodic registration update procedure in response to a periodic update timer expiry event, identifies that the periodic update timer has expired, wherein the periodic update timer expiry event occurs when the UE is out of coverage, selects a cell to camp on, wherein the cell is known to be in a non-allowed area and initiates the periodic registration update procedure in response to the periodic update timer expiry event, wherein the UE delays the periodic registration update procedure until the UE enters a fifth generation mobility management (5GMM) operating substate associated with camping on the cell that is known to be in the non-allowed area.
1 . A processor of a user equipment (UE) configured to perform operations comprising:
initiating a periodic update timer, wherein the UE is configured to perform a periodic registration update procedure in response to a periodic update timer expiry event;
identifying that the periodic update timer has expired, wherein the periodic update timer expiry event occurs when the UE is out of coverage;
selecting a cell to camp on, wherein the cell is known to be in a non-allowed area; and
initiating the periodic registration update procedure in response to the periodic update timer expiry event, wherein the UE delays the periodic registration update procedure until the UE enters a fifth generation mobility management (5GMM) operating substate associated with camping on the cell that is known to be in the non-allowed area, wherein the 5GMM operating substate is 5GMM-REGISTERED.NON-ALLOWED-SERVICE.
2 . The processor of claim 1 , wherein the periodic update timer is timer T3512.
3 . The processor of claim 1 , wherein initiating the periodic registration update procedure includes transmitting a registration request to an access and mobility management function (AMF).
4 . The processor of claim1 , wherein the UE transitions from a first 5GMM operating substate to a second different 5GMM operating substate when the UE is out of coverage.
5 . The processor of claim 4 , wherein the second different 5GMM operating substate is a 5GMM-REGISTERED.NO-CELL-AVAILABLE or 5GMM-REGISTERED.PLMN-SEARCH.
6 . The processor of claim 5 , wherein the UE transitions from the second 5GMM operating substate to a third 5GMM operating substate when the UE camps on the cell that is known to be in a non-allowed area, wherein the third 5GMM operating substate is one of the same as the first 5GMM operating substate or different from the first 5GMM operating substate.
7 . The processor of claim 1 , the operations further comprising:
identifying that the cell has a tracking area identity (TAI) that is not included in an allowed tracking area list for the UE, wherein the cell is known to be in the non-allowed area based on the identifying.
8 . The processor of claim 1 , the operations further comprising:
identifying that the cell has a tracking area identity (TAI) that is included in a non-allowed tracking area list for the UE, wherein the cell is known to be in the non-allowed area based on the identifying.
9 . A user equipment (UE), comprising:
a transceiver configured to communicate with a fifth generation (5G) network; and
a processor communicatively coupled to the transceiver and configured to perform operations comprising:
initiating the periodic registration update timer, wherein the UE is configured to perform a periodic registration update procedure in response to a periodic update timer expiry event;
identifying that the periodic update timer has expired, wherein the periodic update timer expiry event occurs when the UE is out of coverage;
selecting a cell to camp on, wherein the cell is known to be in a non-allowed area; and
initiating the periodic registration update procedure in response to the periodic update timer expiry event, wherein the UE delays the periodic registration update procedure until the UE enters a 5G mobility management (5GMM) operating substate associated with camping on the cell that is known to be in the non-allowed area, wherein the 5GMM operating substate is 5GMM-REGISTERED.NON-ALLOWED-SERVICE.
10 . The UE of claim 9 , wherein the periodic update timer is timer T3512.
11 . The UE of claim 9 , wherein initiating the periodic registration update procedure includes transmitting a registration request to an access and mobility management function (AMF).
12 . The UE of claim 9 , wherein the UE transitions from a first 5GMM operating substate to a second different 5GMM operating substate when the UE is out of coverage.
13 . The UE of claim 12 , wherein the second different 5GMM operating substate is a 5GMM-REGISTERD.NO-CELL-AVAILABLE or 5GMM-REGISTERED. PLMN-SEARCH.
14 . The UE of claim 13 , wherein the UE transitions from the second 5GMM operating substate to a third 5GMM operating substate when the UE camps on the cell that has the TAI that is not included in the allowed tracking area list for the UE, wherein the third 5GMM operating substate is one of the same as the first 5GMM operating substate or different from the first 5GMM operating substate.
15 . A method, comprising:
at a user equipment (UE):
initiating a periodic timer, wherein the UE is configured to perform a periodic registration update procedure in response to a periodic update timer expiry event;
identifying that the periodic update timer has expired, wherein the periodic update timer expiry event occurs when the UE is out of coverage;
selecting a cell to camp on, wherein the cell is known to be in a non-allowed area; and
initiating the periodic registration update procedure in response to the periodic update timer expiry event, wherein the UE delays the periodic registration update procedure until the UE enters a fifth generation mobility management (5GMM) operating substate associated with camping on the cell that has the TAI that is known to be in the non-allowed area, wherein the 5GMM operating substate is 5GMM-REGISTERED.NON-ALLOWED-SERVICE.
16 . The method of claim 15 , wherein the periodic update timer is T3512.
17 . The method of claim 15 , wherein initiating the periodic registration update procedure includes transmitting a registration request to an access and mobility management function (AMF).
18 . The method of claim 15 , wherein the UE transitions from a first 5GMM operating substate to a second different 5GMM operating substate when the UE is out of coverage.
19 . The method of claim 18 ,
wherein the second 5GMM operating substate is 5GMM-REGISTERD.NO-CELL-Available or 5GMM-REGISTERED.PLMN-SEARCH, and
wherein the UE transitions form the second 5GMM operating substate to a third 5GMM operating substate when the UE camps on the cell that has the TAI that is not included int eh allowed tracking area list for the UE, wherein the third 5GMM operating substate is one of the same as the first 5GMM operating substate or different from the first 5GMM operating substate.