Method of handling close subscriber group list synchronization

• US 8,913,553 B2
• Filed: 07/21/2011
• Issued: 12/16/2014
• Est. Priority Date: 07/23/2010
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Tiwari, Kundan
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): Lequang, John
• Application Number:
  US13/188,455
• Publication Number:
  US 20120020295A1
• Time in Patent Office: 1,244 Days
• Field of Search: 370/328, 370/310, 370/331, 370/352, 455/410, 455/411, 455/433, 455/434, 455/437, 455/501
• US Class Current: 370/328
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 8/205 Transfer to or from user equipment or user record carrier

Abstract

A method of handling CSG list synchronization for a network in a wireless communication system is disclosed. The method comprises associating a version number with a user subscribed CSG identities (IDs) list, wherein the user subscribed CSG IDs list is stored in the network; and sending the version number in a OTA (over-the-air) message or in a NAS (non-access stratum) message when the version number is currently used by the network, wherein the OTA message is intended to update an operator CSG list which is stored in a mobile device.

Claims

1. A method of handling close subscriber group (CSG) list synchronization for a network in a wireless communication system, the method comprising:

associating a first version number with a user subscribed CSG identities (IDs) list such that the first version number represents a version of the user subscribed CSG IDs list, wherein the user subscribed CSG IDs list is stored in the network;

sending the first version number in a first OTA (over-the-air) message or in a first NAS (non-access stratum) message when the first version number is currently used by the network, wherein the first OTA message is intended to update an operator CSG list which is stored in a mobile device;

comparing the first version number with a second version number associated with an operator CSG list stored in the mobile device; and

updating the operator CSG list when the first version number does not match the second version number.

2. The method of claim 1 further comprising increasing the first version number when a change related to the user subscribed CSG IDs list has been made.

3. The method of claim 2, wherein the change related to the user subscribed CSG IDs list is caused by registration, expiration or modification of a CSG subscription.

4. The method of claim 1 further comprising receiving the second version number associated with the operator CSG list from the mobile device, wherein the operator CSG list is stored in the mobile device and the second current version number is currently used by the mobile device and sent to the network in a second NAS message.

5. The method of claim 4 further comprising sending a second OTA message to update the operator CSG list when the first version number does not match the second version number.

6. The method of claim 1 further comprising sending a second NAS message to query for the second version number associated with the operator CSG list from the mobile device, wherein the operator CSG list is stored in the mobile device and the second current version number is currently used by the mobile device.

7. The method of claim 6 further comprising receiving the second version number from the mobile device, wherein the second version number is sent in a third NAS message.

8. A method of handling close subscriber group (CSG) list synchronization for a mobile device in a wireless communication system, the method comprising:

receiving a first version number in an OTA (over-the-air) message or a first NAS (non-access stratum) message from a network;

associating the first version number with an operator CSG list stored in the mobile device such that the first version number represents a version of the operator CSG list stored in the mobile device;

comparing the first version number with a second version number currently used by the mobile device; and

updating the operator CSG list when the first version number does not match the second version number.

9. The method of claim 8 further comprising sending the second version number in a second NAS message to the network when the first version number does not match the second version number, wherein the second version number is currently used by the mobile device.

10. The method of claim 8 further comprising:

receiving a second NAS message, wherein the second NAS message is sent by the network to query the second version number which is currently used by the mobile device; and

sending the second version number in a third NAS message to the network.

11. A method of handling close subscriber group (CSG) list synchronization for a mobile device in a wireless communication system, the method comprising:

only displaying a plurality of CSG IDs (identities) of a plurality CSG cells contained in an operator CSG list or an allowed CSG list during a manual CSG ID selection;

wherein the manual CSG ID selection is initiated in a VPLMN (visit public land mobile network) where an HPLMN (Home public land mobile network) inhibits the mobile device to access CSG cells not contained in the operator CSG list or the allowed CSG list.

12. A method of handling close subscriber group (CSG) list synchronization for a mobile device in a wireless communication system, the method comprising:

displaying a plurality of all available CSG IDs (identities) of a plurality CSG cells during a manual CSG ID selection; and

the mobile device checking a first CSG ID of a first CSG cell selected by a user against an operator CSG list or an allowed CSG list stored in the mobile device, and not initiating a registration procedure and displaying error when the first CSG ID of the first CSG cell is not contained in the operator CSG list or the allowed CSG list stored in the mobile device;

wherein the manual CSG ID selection is initiated in a VPLMN (visit public land mobile network) where an HPLMN (Home public land mobile network) inhibits the mobile device to access CSG cells not contained in the operator CSG list or the allowed CSG list.

13. The method of claim 12 further comprising not accessing the first CSG cell.