METHOD AND DEVICE FOR PERFORMING ACCESS BARRING CHECK

• US 20200137664A1
• Filed: 03/19/2018
• Published: 04/30/2020
• Est. Priority Date: 04/18/2017
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Youngdae, KIM, Jaehyun, BYUN, Bokyung
• Granted Patent: US 10,805,860 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

Provided are a method by which a terminal performs an access barring check in a wireless communication system and a device for supporting the same. The method may include: a step for entering an RRC_INACTIVE state; a step for performing the access barring check on a cell; a step for checking that access to the cell is prevented as many times as the maximum number of access attempts; and a step for transitioning from the RRC_INACTIVE state to an RRC_IDLE state.

Claims

1. A method of performing access barring check by a terminal in a wireless communication system, the method comprising:

entering an RRC_INACTIVE state;

performing the access barring check on a cell;

checking that an access to the cell is barred as many times as the maximum number of access attempts; and

transitioning from the RRC_INACTIVE state to an RRC_IDLE state.

2. The method of claim 1, wherein the maximum number of access attempts is pre-configured for the terminal.

3. The method of claim 1, wherein the maximum number of access attempts is received from a network.

4. The method of claim 3, wherein the maximum number of access attempts is received from the network by being included in a system information block.

5. The method of claim 1, wherein the maximum number of access attempts is configured differently for each RRC state.

6. The method of claim 1, wherein the maximum number of access attempts is configured differently for each establishment cause.

7. The method of claim 1, wherein the maximum number of access attempts is configured differently for each service.

8. The method of claim 1, further comprising checking that the access to the cell is barred, until an access timer expires.

9. The method of claim 8, wherein if the terminal checks that the access to the cell is barred as many times as the maximum number of access attempts or if the terminal checks that the access to the cell is barred until the access timer expires, the terminal transitions from the RRC_INACTIVE state to the RRC_IDLE state.

16. The method of claim 1, wherein the terminal communicates with at least one of a mobile terminal, a network or autonomous vehicles other than the terminal.

10. A method of performing access barring check by a terminal in a wireless communication system, the method comprising:

entering an RRC_INACTIVE state;

initiating an access timer;

performing the access barring check on a cell;

checking that an access to the cell is barred, until the access timer expires; and

transitioning from the RRC_INACTIVE state to an RRC_IDLE state.

11. The method of claim 10, wherein the access timer is pre-configured for the terminal.

12. The method of claim 10, wherein the access timer is received from a network.

13. The method of claim 12, wherein the access timer is received from the network by being included in a system information block.

14. The method of claim 10, wherein the access timer is configured differently for each RRC state.

15. A terminal for performing access barring check in a wireless communication system, the terminal comprising:

a memory;

a transceiver, and a processor coupling the memory and the transceiver;

wherein the processor is configured to;

enter an RRC_INACTIVE state;

perform the access barring check on a cell;

check that an access to the cell is barred as many times as the maximum number of access attempts; and

transition from the RRC_INACTIVE state to an RRC_IDLE state.