Method and apparatus for providing access control information in mobile communication system

Patent metadata

Field	Value
Publication number	US-12563475-B2
Application number	US-202218017233-A
Country	US
Kind code	B2
Filing date	Aug 5, 2022
Priority date	Aug 5, 2021
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data rate.

First claim

The invention claimed is:

1 . A method performed by a user equipment (UE) in a communication system, the method comprising:
selecting a second public land mobile network (PLMN) in case that a disaster occurs for a first PLMN previously selected by the UE; receiving from a cell associated with the selected second PLMN, a system information block (SIB) including i) a first barring information set including a first barring factor, a barring time, and access identity information and a second barring information set associated with a disaster condition, the second barring information set including a second barring factor for an access identity 3 ; performing a barring check for the selected second PLMN based on the second barring information set; and in case that the disaster condition has ended, selecting the first PLMN.

2 . The method of claim 1 , wherein the access identity information indicates whether an access attempt is allowed for each access identity.

3 . The method of claim 1 , further comprising:
obtaining a list of PLMNs in which the disaster occurs; and selecting the second PLMN based on the obtained list of the PLMNs.

4 . The method of claim 1 , further comprising transmitting a request message for a radio resource control (RRC) connection to the cell associated with the selected second PLMN in case that an access to the selected second PLMN is allowed based on the barring check for the selected second PLMN,
wherein an establishment cause value included in the request message is configured as the disaster.

5 . A method performed by a base station in a communication system, the method comprising:
transmitting a system information block (SIB) including i) a first barring information set including a first barring factor, a barring time, and access identity information, and a second barring information set associated with a disaster condition, in case that a disaster occurs for a public land mobile network (PLMN) associated with a neighbor cell, the second barring information set including a second barring factor for an access identity 3 ; performing a connection with user equipments (UEs) in the PLMN in which the disaster occurs based on the second barring information set: and instructing the UEs to select a previous PLMN in which the disaster has occurred in case that the disaster condition has ended.

6 . The method of claim 5 , wherein the access identity information indicates whether an access attempt is allowed for each access identity.

7 . The method of claim 5 , wherein the SIB includes a list of PLMNs in which the disaster occurs.

8 . A user equipment (UE) in a communication system, the UE comprising:
a transceiver; and a controller coupled with the transceiver and configured to: select a second public land mobile network (PLMN) in case that a disaster occurs for a first PLMN previously selected by the UE; receive, from a cell associated with the selected second PLMN, a system information block (SIB) including i) a first barring information set including a first barring factor, a barring time, and access identity information and a second barring information set associated with a disaster condition, the second barring information set including a second barring factor for an access identity 3 ; perform a barring check for the selected second PLMN based on the second barring information set: and in case that the disaster condition has ended, select the first PLMN.

9 . The UE of claim 8 , wherein the access identity information indicates whether an access attempt is allowed for each access identity.

10 . The UE of claim 8 , wherein the controller is configured to:
obtain a list of PLMNs in which the disaster occurs, and select the second PLMN based on the obtained list of the PLMNs.

11 . The UE of claim 8 , wherein the controller is configured to transmit a request message for a radio resource control (RRC) connection to the cell associated with the selected second PLMN in case that an access to the selected second PLMN is allowed based on the barring check for the selected second PLMN,
wherein an establishment cause value included in the request message is configured as the disaster.

12 . A base station in a communication system, the base station comprising:
a transceiver; and a controller coupled with the transceiver and configured to: transmit a system information block (SIB) including i) a first barring information set including a first barring factor, a barring time, and access identity information and a second barring information set associated with a disaster condition, in case that a disaster occurs for a public land mobile network (PLMN) associated with a neighbor cell, the second barring information set including a second barring factor for an access identity 3 , perform a connection with user equipments (UEs) in the PLMN in which the disaster occurs based on the second barring information set, and instruct the UEs to select a previous PLMN in which the disaster has occurred in case that the disaster condition has ended.

13 . The base station of claim 12 , wherein the access identity information indicates whether an access attempt is allowed for each access identity.

14 . The base station of claim 12 , wherein the SIB includes a list of PLMNs in which the disaster occurs.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jin Seungri
• Jung Sangyeob
• Agiwal Anil
• Kim Sangbum

Classifications

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title

• H04W4/90

  Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] · CPC title

• H04W48/08 Primary

  Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) · CPC title

• H04W48/02

  Access restriction performed under specific conditions · CPC title

• H04W48/12

  using downlink control channel · CPC title