Method and user equipment for performing access control in 5GS
AssigneeLG Electronics Inc.
InventorsJaehyun Kim, Myungjune Youn, Sangmin Park, Jinsook Ryu
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Abstract
Disclosed in the present specification is a method by which a user equipment (UE) performs access control. The method can comprise the steps of: transmitting a protocol data unit (PDU) session establishment or modification request message; and receiving a PDU session establishment or modification rejection message. The rejection message can comprise information on a backoff timer and session network slice selection assistance information (S-NSSAI). The method can comprise the steps of: driving the backoff timer while being linked with the S-NSSAI; and performing access control on the basis of the S-NSSAI.
Claims14
A method for performing access control by a user equipment (UE), the method comprising:
- performing a registration procedure with an Access and mobility Management Function (AMF) of a Visited Public Land Mobile Network (V-PLMN),
- wherein the registration procedure comprises receiving a registration accept message from the AMF of the V-PLMN, wherein the registration accept message includes i) Allowed Network Slice Selection Assistance Information (NSSAI) and ii) Mapping of the Allowed NSSAI which is information for mapping of each Single NSSAI (S-NSSAI) of the Allowed NSSAI to S-NSSAIs of a Home PLMN (H-PLMN);
- transmitting, to a Session Management Function (SMF) of the V-PLMN, a request message related to a Protocol Data Unit (PDU) session, wherein the request message includes i) an S-NSSAI from the Allowed NSSAI of a current access type, and ii) a corresponding S-NSSAI from the Mapping of the Allowed NSSAI;
- based on an S-NSSAI-based congestion control being applied for the S-NSSAI, receiving, from the SMF of the V-PLMN, a reject message related to the PDU session, wherein the reject message includes i) information on a backoff timer, ii) information informing the UE of either the H-PLMN or the V-PLMN associated with the S-NSSAI and iii) a cause value;
- operating the backoff timer in association with the S-NSSAI;
- and
- performing the S-NSSAI-based congestion control for the S-NSSAI while the backoff timer is running.
A User Equipment (UE) configured to perform access control, the UE comprising:
- a transceiver;
- and
- a processor configured to control the transceiver, wherein the processor is further configured to perform:
- a process performing a registration procedure with an Access and mobility Management Function (AMF) of a Visited Public Land Mobile Network (V-PLMN),
- wherein the registration procedure comprises receiving a registration accept message from the AMF of the V-PLMN, wherein the registration accept message includes i) Allowed Network Slice Selection Assistance Information (NSSAI) and ii) Mapping of the Allowed NSSAI which is information for mapping of each Single NSSAI (S-NSSAI) of the Allowed NSSAI to S-NSSAIs of a Home PLMN (H-PLMN);
- a process for transmitting, to a Session Management Function (SMF) of the V-PLMN, a request message related to a Protocol Data Unit (PDU) session, wherein the request message includes i) an S-NSSAI from the Allowed NSSAI of a current access type, and ii) a corresponding S-NSSAI from the Mapping of the Allowed NSSAI;
- a process for receiving, from the SMF of the V-PLMN, a reject message related to the PDU session, based on an S-NSSAI-based congestion control being applied for the S-NSSAI, wherein the reject message includes i) information on a backoff timer, ii) information informing the processor of either the H-PLMN or the V-PLMN associated with the S-NSSAI and iii) a cause value;
- and
- a process for operating the backoff timer in association with the S-NSSAI and a process for performing the S-NSSAI-based congestion control for S-NSSAI while the backoff timer is running.
Dependencies are inferred from the claim text.