Method for performing access control in next-generation mobile communication network, and user equipment
Disclosed in the present specification is a method by which a user equipment (UE) performs access control. The method comprises the steps of: allowing a non-access-stratum (NAS) layer of the UE to transfer information on an important service and a NAS signaling request to a radio resource control (RRC) layer, when the important service is required even if access to a cell is currently interrupted or a back-off timer is operated; and allowing the RRC layer to skip or override an inspection for access control on the basis of the information on the important service, wherein, the information on the important service can be set in advance.
1. A method in which a user equipment (UE) performs access control, the method comprising:
operating, by a non-access-stratum (NAS) layer of the UE, a back-off timer, based on that an access via a first network slice is barred, wherein the operation of the back-off timer depends on the first network slice;
detecting, by the NAS layer of the UE, that an important service is requested, wherein the important service is to be provided via a second network slice;
transferring, by the NAS layer of the UE, information about the important service and a NAS signaling request to a radio resource control (RRC) layer of the UE, while the back-off timer is operating based on that the access via the first network slice is barred; and
skipping or overriding, by the RRC layer, a check for access control based on the information about the important service,
wherein the information about the important service is preset in advance.
2. The method of claim 1 , wherein the back-off timer is driven on a specific criterion basis.
3. The method of claim 2 , further comprising receiving in advance setting information about the specific criterion,
wherein the specific criterion comprises at least one of a UE type, a service type, a communication type, or a group.
4. The method of claim 1 , wherein the access via the first network slice is barred on a specific criterion basis.
5. The method of claim 1 , further comprising overriding or stopping the driving back-off timer.
6. The method of claim 1 , wherein the information about the important service is included in a call type, an RRC establishment cause, or a category to be transferred to the RRC layer.
7. A user equipment configured to perform access control, the user equipment (UE) comprising:
a transceiver; and
a processor configured to control the transceiver and to drive a radio resource control (RRC) layer and a non-access-stratum (NAS) layer of the UE,
wherein the NAS layer of the UE operates a back-off timer, based on that an access via a first network slice is barred, wherein the operation of the back-off timer depends on the first network slice;
wherein the NAS layer of the UE detects that an important service is requested, wherein the important service is to be provided via a second network slice;
wherein the NAS layer of the UE transfers information about the important service and a NAS signaling request to the RRC layer of the UE, while the back-off timer is operating based on that the access via the first network slice is barred, and
the RRC layer of the UE skips or overrides a check for access control based on the information about the important service,
wherein the information about the important service is preset in advance.
8. The user equipment of claim 7 , wherein the back-off timer is driven on a specific criterion basis.
9. The user equipment of claim 8 , wherein the processor is configured to receive in advance setting information about the specific criterion, and
the specific criterion comprises at least one of a UE type, a service type, a communication type, or a group.
10. The user equipment of claim 7 , wherein the access via the first network slice is barred on a specific criterion basis.
11. The user equipment of claim 7 , wherein the processor is configured to override or stop the driving back-off timer.
12. The user equipment of claim 7 , wherein the information about the important service is included in a call type, an RRC establishment cause, or a category to be transferred to the RRC layer.