Method, user equipment, and network node for performing PDU session establishment procedure for LADN

Patent metadata

Field	Value
Publication number	US-11470657-B2
Application number	US-201917040440-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Mar 29, 2018
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

One disclosure of the present specification provides a method by which a user equipment (UE) performs a protocol data unit (PDU) session establishment procedure for a local area data network (LADN). The method comprises: when a pre-set condition related to an LADN policy is satisfied, transmitting a message requesting an access and mobility management function (AMF) for the LADN policy; receiving, from the AMF, the LADN policy provided by a policy control function (PCF), wherein the LADN policy comprises information about at least one application and information about a LADN data network name (DNN) related to the at least one application; determining a LADN DNN to be used by the UE, on the basis of the LADN policy; and transmitting a PDU session establishment request message related to the determined LADN DNN to the AMF.

First claim

What is claimed is:

1. A method for performing a Protocol Data Unit (PDU) session establishment procedure for a Local Area Data Network (LADN) by a user equipment (UE), the method comprising:
transmitting a registration request message to an Access and Mobility Management Function (AMF);
receiving a registration accept message from the AMF;
when a preconfigured condition related to an LADN policy is satisfied, transmitting a message for requesting an LADN policy to a Policy Control Function (PCF), via the AMF,
wherein the message for requesting the LADN policy includes information related to the LADN policy previously received from the PCF;
receiving, from the PCF via the AMF, the LADN policy updated by the PCF,
wherein the LADN policy includes information related to at least one application and information related to a LADN Data Network Name (DNN) related to the at least one application;
determining a LADN DNN to be used by the UE based on the LADN policy; and
transmitting, to the AMF, a PDU session establishment request message related to the determined LADN DNN.

2. The method of claim 1 , wherein the message for requesting the LADN policy includes at least one of information indicating that the LADN policy is requested, information associated with the LADN DNN, information related to a registration area of the UE, and information related to a location of the UE.

3. The method of claim 1 , wherein the information related to the LADN DNN included in the LADN policy includes information related to at least one of Single Network Slice Selection Assistance Information (S-NSSAI) associated with the LADN DNN, a Session and Service Continuity (SSC) mode, and a PDU session type.

4. The method of claim 1 , wherein the preconfigured condition is satisfied when the information associated with the LADN is received from the AMF or the UE enters an LADN service area.

5. The method of claim 1 , wherein the information related to the at least one application is an application ID or packet filter type information.

6. A method for performing a Protocol Data Unit (PDU) session establishment procedure for LADN by a Policy Control Function (PCF), the method comprising:
receiving, from an Access and Mobility Management Function (AMF), a message for requesting a Local Area Data Network policy (LADN policy),
wherein the message for requesting the LADN policy is a message transmitted to the AMF by a user equipment (UE);
generating the LADN policy based on the message for requesting the LADN policy,
wherein the LADN policy includes information related to at least one application and information related to a LADN DNN related to the at least one application; and
transmitting, to the AMF, the LADN policy.

7. The method of claim 6 , wherein the LADN policy is delivered from the AMF to the UE and used for determining the LADN DNN to be used by the UE.

8. The method of claim 6 , further comprising:
receiving, from the AMF, information for notifying that information related to the LADN is provided to the UE; and
when the AMF receives the information for notifying that the information related to the LADN is provided, transmitting the LADN policy to the AMF.

9. The method of claim 6 , further comprising:
transmitting, to the AMF, a message for configuring an event related to the LADN; and
when the message for configuring the event related to the LADN is received from the AMF, transmitting the LADN policy to the AMF,
wherein the event related to the LADN includes an event in which the UE enters an LADN service area.

10. The method of claim 6 , wherein the message for requesting the LADN policy includes at least one of information indicating that the LADN policy is requested, information associated with the LADN DNN, information related to a registration area of the UE, information related to a location of the UE, operating system (OS) information of the UE, and PSI information.

11. The method of claim 6 , further comprising:
when the message for requesting the LADN policy includes information related to the LADN policy previously received by the UE, generating an updated LADN policy; and
transmitting the updated LADN policy to the AMF.

12. The method of claim 6 , wherein the information related to the at least one application is an application ID or packet filter type information.

13. A processor of a wireless device, wherein the processor controls the wireless device, and
wherein the processor is configured to:
transmit a registration request message to an Access and Mobility Management Function (AMF);
receive a registration accept message from the AMF;
when a preconfigured condition related to a Local Area Data Network (LADN) policy is satisfied, transmit a message for requesting an LADN policy to a Policy Control Function (PCF), via the AMF,
wherein the message for requesting the LADN policy includes information related to the LADN policy previously received from the PCF;
receive, from the PCF via the AMF, the LADN policy updated by the PCF,
wherein the LADN policy includes information related to at least one application and information related to a LADN DNN related to the at least one application;
determine a LADN DNN to be used based on the LADN policy; and
transmit, to the AMF, a Protocol Data Unit (PDU) session establishment request message related to the determined LADN DNN.

14. The processor of a wireless device of claim 13 , wherein the preconfigured condition is satisfied when the information associated with the LADN is received from the AMF or the wireless device enters an LADN service area.

Assignees

• Lg Electronics Inc

Inventors

• Youn Myungjune
• Kim Hyunsook
• Ryu Jinsook

Classifications

• H04W60/04

  using triggered events · CPC title

• H04W76/12 Primary

  Setup of transport tunnels · CPC title

• H04W76/10 Primary

  Connection setup · CPC title

• H04W8/06

  Registration at serving network Location Register, VLR or user mobility server · CPC title

• H04W8/08

  Mobility data transfer · CPC title