METHOD AND APPARATUS FOR ACCESSING CELL IN WIRELESS COMMUNICATION SYSTEM

• US 20150079938A1
• Filed: 03/22/2013
• Published: 03/19/2015
• Est. Priority Date: 03/22/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sunghoon, Lee, Youngdae, Park, Sungjun, Yi, Seungjune
• Granted Patent: US 9,301,239 B2
• Time in Patent Office: Days
• US Class Current: 455/411
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 48/06 based on traffic conditions
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

Provided is an access method which is carried out by a terminal in a wireless communication system. The method comprises: obtaining system information from a target cell; determining whether system information for extended access barring (EAB) has been scheduled to the system information; determining whether EAB information is included in the system information for the EAB, when the system information for the EAB has been scheduled; and determining whether to bar access to the target cell on the basis of the EAB information when the EAB information is included.

Claims

1. A method for accessing carried out by a user equipment (UE) in a wireless communication system, the method comprising:

obtaining system information from a target cell;

determining whether system information for extended access barring (EAB) has been scheduled in the system information;

when the system information for the EAB has been scheduled, determining whether EAB information is included in the system information for the EAB; and

when the EAB information is included in the system information for EAB, determining whether accessing the target cell is barred on the basis of the EAB information.

2. The method of claim 1, further comprising:

when the system information for EAB has not been scheduled in the system information, determining that accessing the target cell is barred.

3. The method of claim 2, further comprising:

when it is determined that the system information for EAB has not been scheduled so accessing the target cell is barred, informing a higher layer that accessing is barred due to EAB.

4. The method of claim 1, further comprising:

when the system information for EAB has been scheduled and the EAB information is not included in the system information for EAB, determining that accessing the target cell is not barred.

5. The method of claim 4, further comprising:

when it is determined that the system information for EAB has been scheduled and the EAB information is not included in the system information for EAB so accessing the target cell is not barred, informing the higher layer that access barring due to EAB has been released.

6. The method of claim 5, further comprising:

when it is determined that accessing the target cell due to EAB is not barred, establishing radio resource control (RRC) connection with the target cell.

7. The method of claim 6, wherein establishing the RRC connection with the target cell is performed in response to a service request triggered by the higher layer.

8. The method of claim 1, wherein the UE is barred from accessing a previous cell according to previous EAB information provided from the previous cell.

9. A wireless device operating in a wireless communication system, the wireless device comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor functionally coupled to the RF unit,

wherein the processor is configured to implement a first layer and a second layer as a higher layer of the first layer, and

the first layer is configured to obtain system information from a target cell, determine whether system information for extended access barring (EAB) has been scheduled in the system information, determine whether EAB information is included in the system information for EAB when the system information for EAB has been scheduled, and determine whether accessing the target cell is barred based on the EAB information when the EAB information is included in the system information for EAB.

10. The wireless device of claim 9, wherein the first layer is configured to determine that accessing the target cell is barred, when the system information for EAB has not been scheduled in the system information.

11. The wireless device of claim 10, wherein the first layer is configured to inform the second layer that accessing is barred due to EAB when the system information for EAB has not been scheduled so accessing the target cell is barred.

12. The wireless device of claim 9, wherein the first layer is configured to determine that accessing the target cell is not barred when the system information for EAB has been scheduled and the EAB information is not included in the system information for EAB.

13. The wireless device of claim 12, wherein the first layer is configured to inform the second layer that access barring due to EAB has been released, when it is determined that the system information for EAB has been scheduled and the EAB information is not included in the system information for EAB so accessing the target cell is not barred.

14. The wireless device of claim 13, wherein the first layer is configured to establish radio resource control (RRC) connection with the target cell, when it is determined that accessing the target cell due to EAB is not barred.

15. The wireless device of claim 14, wherein establishing the RRC connection with the target cell is performed in response to a service request triggered by the second layer.

16. The wireless device of claim 9, wherein the wireless device is barred from accessing a previous cell according to previous EAB information provided from the previous cell.