Method of handling cell selection for in a wireless communication system and related mobile device

• US 8,837,426 B2
• Filed: 09/23/2009
• Issued: 09/16/2014
• Est. Priority Date: 12/19/2008
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Wu, Chih-Hsiang
• Primary Examiner(s): Moore, Ian N.
• Assistant Examiner(s): TANG, KIET G
• Application Number:
  US12/564,924
• Publication Number:
  US 20100159928A1
• Time in Patent Office: 1,819 Days
• Field of Search: 370/331, 455/437, 455/411, 709/228
• US Class Current: 370/331
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

A method of handling cell selection for a mobile device in a wireless communication system is disclosed. The method includes when the mobile device has a radio resource control (RRC) connection with a cell and receives access barring information corresponding to a barred state of another cell, ignoring the access barring information.

Claims

1. A method of handling cell selection for a mobile device in a wireless communication system, the method comprising:

when the mobile device has a radio resource control (RRC) connection with a first cell, and the mobile device receives access barring information corresponding to a barred state of a second cell when the mobile device is in a RRC connected mode with the first cell ignoring the access barring information by the mobile device in the RRC connected mode, wherein the access barring information is included in a broadcast message of the second cell, and the broadcast message is a system information block type 1 comprising cell status and reservation information.

2. The method of claim 1, wherein the reception of the broadcast message is trigged by a handover procedure, an RRC connection re-establishment procedure or a system information change procedure.

3. The method of claim 1, wherein the access barring information comprises the cell status and the reservation information.

4. The method of claim 3, wherein the cell status is indicated by a cellBarred information element (IE) and the reservation information is indicated by a cellReservedForOperatoruse IE and a cellReservationExtension IE.

5. The method of claim 1 further comprising:

continuously receiving system information of the second cell on a broadcast channel; and

moving out of the second cell when the mobile device finds that the system information is changed.

6. The method of claim 1, wherein the second cell and the first cell are the same cell.

7. A mobile device of a wireless communication system for handling cell selection or reselection, the mobile device comprising:

a non-transitory computer readable recording medium for storing program code corresponding to a process; and

a processor coupled to the non-transitory computer readable recording medium, for processing the program code to execute the process;

wherein the process comprises;

when the mobile device has a radio resource control (RRC) connection with a first cell, and the mobile device receives access barring information corresponding to a barred state of a second cell when the mobile device is in a RRC connected mode with the first cell, ignoring the access barring information by the mobile device in the RRC connected mode, wherein the access barring information is included in a broadcast message of the second cell, and the broadcast message is a system information block type 1 comprising cell status and reservation information.

8. The mobile device of claim 7, wherein the reception of the broadcast message is trigged by a handover procedure, an RRC connection re-establishment procedure or a system information change procedure.

9. The mobile device of claim 7, wherein the access barring information comprises the cell status and the reservation information.

10. The mobile device of claim 9, wherein the cell status is indicated by a cellBarred information element (IE) and the reservation information is indicated by a cellReservedForOperatoruse IE and a cellReservationExtension IE.

11. The mobile device of claim 7, wherein the process further comprises:

continuously receiving system information of the second cell on broadcast channel; and

moving out of the second cell with barred status when the UE finds the system information is changed.

12. The mobile device of claim 7, wherein the second cell and the first cell are the same cell.