Method and apparatus for managing tracking area update in next-generation satellite communication system

Patent metadata

Field	Value
Publication number	US-12531631-B2
Application number	US-202218283962-A
Country	US
Kind code	B2
Filing date	Mar 25, 2022
Priority date	Mar 26, 2021
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

The present invention relates to a method performed by a terminal operating in a stand-alone non-public network (SNPN) connection mode in a communication system. The method comprises the steps of: receiving, from a base station, a radio resource control (RRC) release message including reservation configuration information; entering an RRC deactivation state on the basis of the RRC release message; performing a cell reselection procedure; and triggering an RNA update procedure when a cell selected according to the reselection procedure is not included in cell information included in notification area information.

First claim

The invention claimed is:

1 . A method performed by a user equipment (UE) in a stand-alone non-public network (SNPN) access mode in a communication system, the method comprising:
receiving, from a base station, a radio resource control (RRC) release message including suspension configuration information, wherein the suspension configuration information includes notification area information including one of a cell list or a radio access network (RAN) area configuration list; entering an RRC inactive state based on the RRC release message; performing a cell selection procedure; and performing an RAN notification area (RNA) update procedure in case that a serving cell does not belong to the notification area information, wherein in case that the cell list is included in the notification area information, a public land mobile network (PLMN) identity is not included in the cell list for the UE in the SNPN access mode and the cell list is associated with a registered SNPN for the UE in the SNPN access mode, and wherein in case that the RAN area configuration list is included in the notification area information, the PLMN identity is not included in the RAN area configuration list for the UE in the SNPN access mode and the RAN area configuration list is associated with the registered SNPN for the UE in the SNPN access mode.

2 . The method of claim 1 , wherein an identity of the registered SNPN includes the PLMN identity and a network identifier.

3 . The method of claim 1 , wherein a PLMN selection procedure is not performed for the UE in the SNPN access mode.

4 . The method of claim 1 , wherein the cell list includes at least one cell identity.

5 . The method of claim 1 , wherein the RAN area configuration list includes at least one RAN area configuration, and
wherein the at least one RAN area configuration includes a tracking area code and at least one RAN area code.

6 . The method of claim 1 , wherein the cell list or the RAN area configuration list further includes a network identifier list, and
wherein the network identifier list is configured per PLMN.

7 . A user equipment (UE) operating in a stand-alone non-public network (SNPN) access mode in a communication system, the UE comprising:
a transceiver; and a controller coupled with the transceiver and configured to: receive, from a base station, a radio resource control (RRC) release message including suspension configuration information, wherein the suspension configuration information includes notification area information including one of a cell list or a radio access network, RAN, area configuration list, enter an RRC inactive state based on the RRC release message, perform a cell selection procedure, and perform an RAN notification area (RNA) update procedure in case that a serving cell does not belong to the notification area information, wherein in case that the cell list is included in the notification area information, a public land mobile network (PLMN) identity is not included in the cell list for the UE in the SNPN access mode and the cell list is associated with a registered SNPN for the UE in the SNPN access mode, and wherein in case that the RAN area configuration list is included in the notification area information, the PLMN identity is not included in the RAN area configuration list for the UE in the SNPN access mode and the RAN area configuration list is associated with the registered SNPN for the UE in the SNPN access mode.

8 . The UE of claim 7 , wherein an identity of the registered SNPN includes the PLMN identity and a network identifier.

9 . The UE of claim 7 , wherein a PLMN selection procedure is not performed for the UE in the SNPN access mode.

10 . The UE of claim 7 ,
wherein the cell list includes at least one cell identity.

11 . The UE of claim 7 , wherein the RAN area configuration list includes at least one RAN area configuration, and
wherein the at least one RAN area configuration includes a tracking area code and at least one RAN area code.

12 . The UE of claim 7 , wherein the cell list or the RAN area configuration list further includes a network identifier list, and
wherein the network identifier list is configured per PLMN.

13 . The method of claim 1 , wherein the RNA update procedure is not performed in case that the serving cell belongs to the notification area information.

14 . The UE of claim 7 , wherein the RNA update procedure is not performed in case that the serving cell belongs to the notification area information.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jung Sangyeob
• Kim Soenghun

Classifications

• H04W84/06

  Airborne or Satellite Networks (space-based or airborne stations H04B7/185) · CPC title

• H04B7/18545

  Arrangements for managing station mobility, i.e. for station registration or localisation · CPC title

• H04B7/18539

  Arrangements for managing radio, resources, i.e. for establishing or releasing a connection · CPC title

• H04W76/27

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

• H04B7/18513 Primary

  Transmission in a satellite or space-based system · CPC title