Method and user equipment for initiating service request procedure

Patent metadata

Field	Value
Publication number	US-11463979-B2
Application number	US-202017090567-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 17, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A disclosure in the present specification provides a method for user equipment initiating a service request procedure. The method includes a step of the UE receiving a paging message. The UE may be registered to both of a 3rd generation partnership project (3GPP) access and a non-3GPP access within the same PLMN. The paging message may include access type information that is used so as to indicate the non-3GPP access. The method may include a step of initiating a UE triggered service request procedure. The UE triggered service request procedure may be initiated by transmitting a service request message including a list of permitted protocol data unit (PDU) sessions. The service request message may include an empty list of the permitted PDU sessions if there is no PDU sessions that can be reactivated in the 3GPP access.

First claim

What is claimed is:

1. An operation method of a user equipment (UE), the method comprising:
performing, by the UE, a registration procedure over a 3rd generation partnership project (3GPP) access and a non-3GPP access in a same Public Land Mobile Network (PLMN);
receiving, by the UE from an Access and Mobility Management Function (AMF) node, a paging message while in an idle state in both of the 3GPP access and the non-3GPP access,
wherein the paging message includes access type information informing that the paging message is originated due to a protocol data unit (PDU) session over the non-3GPP access; and
transmitting, by the UE, a service request message including a list of allowed PDU sessions, upon receiving the paging message,
wherein based on that there is no PDU session to be reactivated over the 3GPP access, the service request message includes an empty list of allowed PDU sessions, and
wherein all bits of PDU session identifiers (PSIs) in the empty list of the allowed PDU sessions are coded as zero (0).

2. The method of claim 1 , wherein the empty list of the allowed PDU sessions including no PSI is used for the AMF to notify a session management function (SMF) that the UE was reachable but did not accept to reactive the PDU session.

3. The method of claim 1 , wherein based on that the PDU session over the non-3GPP access is to be reactivated over the 3GPP access, the service request message includes the list of the allowed PDU sessions which includes a PSI of the PDU session.

4. A user equipment (UE), the UE comprising:
a transceiver; and
a processor configured to control the transceiver,
wherein the processor performs a registration procedure over a 3rd generation partnership project (3GPP) access and a non-3GPP access in a same Public Land Mobile Network (PLMN),
wherein the processor receives, through the transceiver from an Access and Mobility Management Function (AMF) node, a paging message while in an idle state in both of the 3GPP access and the non-3GPP access,
wherein the paging message includes access type information informing that the paging message is originated due to a protocol data unit (PDU) session over the non-3GPP access,
wherein the processor transmits, through the transceiver, a service request message including a list of allowed PDU sessions, upon receiving the paging message,
wherein based on that there is no PDU session which is to be reactivated over the 3GPP access, the service request message includes an empty list of allowed PDU sessions, and
wherein all bits of PDU session identifiers (PSIs) in the empty list of the allowed PDU sessions are coded as zero (0).

5. The UE of claim 4 , wherein the empty list of the allowed PDU sessions including no PSI is used for the AMF to notify a session management function (SMF) that the UE was reachable but did not accept to reactive the PDU session.

6. The UE of claim 4 , wherein, based on that the PDU session over the non-3GPP access is to be reactivated over the 3GPP access, the service request message includes the list of the allowed PDU sessions which includes a PSI of the PDU session.

7. An operation method of an access and mobility management function (AMF) node, the method comprising:
transmitting a paging message for a user equipment (UE),
wherein the UE is registered in both of a 3rd generation partnership project (3GPP) access and a non-3GPP access in a same Public Land Mobile Network (PLMN),
wherein the UE is in an idle state in the both of the 3GPP access and the non-3GPP access, and
wherein the paging message includes an access type information informing that the paging message is originated due to a protocol data unit (PDU) session over the non-3GPP access; and
receiving, from the UE, a service request message including a list of allowed PDU sessions, upon the UE receiving the paging message,
wherein based on that the service request message includes an empty list of allowed PDU sessions, there is no PDU session which is to be reactivated over the 3GPP access, and
wherein all bits of PDU session identifiers (PSIs) in the empty list of the allowed PDU sessions are coded as zero (0).

8. The method AMF node of claim 7 , further comprising:
notifying a session management function (SMF) that the UE was reachable but did not accept to reactive the PDU session, based on the empty list of the allowed PDU sessions including no PSI.

9. An access and mobility management function (AMF) node, the AMF node comprising:
a transceiver; and
a processor operably coupled to the transceiver,
wherein the processor is configured to control the transceiver to transmit a paging message for a user equipment (UE),
wherein the UE is registered in both of a 3rd generation partnership project (3GPP) access and a non-3GPP access in a same Public Land Mobile Network (PLMN),
wherein the UE is in an idle state in the both of the 3GPP access and the non-3GPP access, and
wherein the paging message includes an access type information informing that the paging message is originated due to a protocol data unit (PDU) session over the non-3GPP access;
wherein the processor is configured to control the transceiver to receive, from the UE, a service request message including a list of allowed PDU sessions, upon the UE receiving the paging message,
wherein based on that the service request message includes an empty list of allowed PDU sessions, there is no PDU session which is to be reactivated over the 3GPP access, and
wherein all bits of PDU session identifiers (PSIs) in the empty list of the allowed PDU sessions are coded as zero (0).

Assignees

• Lg Electronics Inc

Inventors

• Youn Myungjune
• Kim Laeyoung
• Kim Jaehyun
• Kim Hyunsook
• Ryu Jinsook
• Park Sangmin

Classifications

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04W60/005 Primary

  Multiple registrations, e.g. multihoming · CPC title

• H04W36/0027

  for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections · CPC title

• H04W68/02

  Arrangements for increasing efficiency of notification or paging channel · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title