METHOD FOR REGISTERING TERMINAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

• US 20200137675A1
• Filed: 06/18/2018
• Published: 04/30/2020
• Est. Priority Date: 06/17/2017
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: PARK, Sangmin, RYU, Jinsook, KIM, Hyunsook
• Granted Patent: US 11,184,838 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server
• CPC Class Codes: H04W 8/08 Mobility data transfer
• CPC Class Codes: H04W 80/10 adapted for application session management, e.g. SIP [Session Initiation Protocol] connection management H04W76/00; arrangements for session management H04L67/14

Abstract

A method for registering a terminal of an access and mobility management function (AMF) in a wireless communication system, according to one aspect of the present invention, comprises the steps of: receiving, from a terminal, a registration request message requesting registration of the terminal; and transmitting, to the terminal, a registration response message in response to the registration request message, wherein the registration request message may include: a session management (SM) message for requesting the establishment of a packet data unit (PDU) session for the terminal; and an indicator for indicating whether the establishment of the PDU session is essential.

Claims

1. A method of registration of a UE by an access and mobility management function (AMF) in a wireless communication system, the method comprising:

receiving a registration request message for requesting to register the UE from the UE; and

transmitting a registration response message responsive to the registration request message to the UE, wherein

the registration request message includes a session management (SM) message for requesting to establish a packet data unit (PDU) session for the UE and an indicator indicating whether the PDU session establishment is required.

2. The method of claim 1, further comprising determining whether to transfer the SM message to a session management function (SMF) based on a switch of a registration management (RM) state of the UE according to the registration request message.

3. The method of claim 2, wherein

determining whether to transfer the SM message is transferring the SM message to the SMF when the RM state of the UE switches from RM-DEREGISTERED to RM-REGISTERED according to the registration request message and transferring a registration reject message, as the registration response message, rather than transferring the SM message to the SMF when the RM state of the UE remains RM-DEREGISTERED according to the registration request message.

4. The method of claim 3, wherein

when the SM message is transferred to the SMF, transmitting the registration response message is performed after an SM response message responsive to the SM message is received when the indicator indicates that the PDU session establishment is required and is performed regardless of whether the SM response message is received when the indicator indicates that the PDU session establishment is not required.

5. The method of claim 4, wherein

the SM response message includes information as to whether the PDU session establishment request is authorized and/or, when the PDU session establishment request is rejected, information regarding a cause for the rejection.

6. The method of claim 5, wherein

when the indicator indicates that the PDU session establishment is required, a type of the registration response message is determined based on the SM response message.

7. The method of claim 6, wherein

when the SM response message indicates authorization of the PDU session establishment, the type of the registration response message is determined to be a registration accept message and, when the SM response message indicates rejection of the PDU session establishment, the type of the registration response message is determined to be a registration reject message.

8. The method of claim 7, wherein

the indicator is included in a request type field, user equipment (UE) network capability field, or session management (SM) payload type field in the registration request message.

9. An access and mobility management function (AMF) performing a UE registration method in a wireless communication system, the AMF comprising:

a communication module for transmitting or receiving a signal; and

a processor controlling the communication module, wherein

the processor receives a registration request message for requesting to register a UE from the UE and transmits a registration response message responsive to the registration request message to the UE, and wherein

the registration request message includes a session management (SM) message for requesting to establish a packet data unit (PDU) session for the UE and an indicator indicating whether the PDU session establishment is required.

10. The AMF of claim 9, wherein

the processor determines whether to transfer the SM message to a session management function (SMF) based on a switch of a registration management (RM) state of the UE according to the registration request message.

11. The AMF of claim 10, wherein

the processor, upon determining whether to transfer the SM message, transfers the SM message to the SMF when the RM state of the UE switches from RM-DEREGISTERED to RM-REGISTERED according to the registration request message and transfers a registration reject message, as the registration response message, rather than transferring the SM message to the SMF when the RM state of the UE remains RM-DEREGISTERED according to the registration request message.

12. The AMF of claim 11, wherein

when the SM message is transferred to the SMF, the processor transmits the registration message after an SM response message responsive to the SM message is received when the indicator indicates that the PDU session establishment is required and transmits the registration message regardless of whether the SM response message is received when the indicator indicates that the PDU session establishment is not required.

13. The AMF of claim 12, wherein

the SM response message includes information as to whether the PDU session establishment request is authorized and/or, when the PDU session establishment request is rejected, information regarding a cause for the rejection.

14. The AMF of claim 13, wherein

when the indicator indicates that the PDU session establishment is required, a type of the registration response message is determined based on the SM response message.

15. The AMF of claim 14, wherein

when the SM response message indicates authorization of the PDU session establishment, the type of the registration response message is determined to be a registration accept message and, when the SM response message indicates rejection of the PDU session establishment, the type of the registration response message is determined to be a registration reject message.