METHOD AND APPARATUS FOR CELL BARRING IN A WIRELESS COMMUNICATION SYSTEM

• US 20130051366A1
• Filed: 10/25/2012
• Published: 02/28/2013
• Est. Priority Date: 01/05/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Amerga, Daniel, Tenny, Nathan Edward
• Granted Patent: US 9,094,896 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

Systems and methodologies are described herein that facilitate cell barring based on erroneous messages received within a wireless communication system. As described herein, in the event that a device fails to receive and/or decode respective messages transmitted from a network cell over a common communication channel, the device can implement one or more error handling procedures as described herein to reselect away from the network cell and/or a frequency associated with the network cell (e.g., as if the network cell was explicitly barred). Cell barring can be triggered as described herein based on a count of erroneous messages (e.g., consecutive messages, messages received within a predetermined time window, etc.), elapsed time between erroneous messages, or the like. Further, cell barring can be performed as described herein based on failure to acquire pre-scheduled system information, common system information determined to have invalid abstract syntax, or the like.

Claims

1. A method, comprising:

obtaining one or more messages from a designated network cell over a common channel;

attempting decoding of the one or more messages;

tracking respective errors encountered during the attempted decoding of the one or more messages, wherein the tracking comprises maintaining a count of erroneous messages encountered during the attempted decoding of the one or more messages; and

initiating an avoidance procedure associated with barred network cells with respect to the designated network cell according to respective tracked errors associated with the attempted decoding of the one or more messages, wherein the initiating comprises initiating the avoidance procedure associated with barred network cells with respect to the designated network cell upon determining that the count exceeds a predetermined threshold.

2. The method of claim 1, wherein the common channel is a Common Control Channel (CCCH).

3. The method of claim 1, wherein the one or more messages comprise Radio Resource Control (RRC) messages.

4. The method of claim 1, wherein the tracking comprises tracking respective messages in the one or more messages for which an associated abstract syntax is invalid.

5. The method of claim 1, wherein the count is a count of consecutive erroneous messages encountered during the attempted decoding of the one or more messages.

6. The method of claim 1, wherein the count is a count of erroneous messages encountered within a predefined time window during the attempted decoding of the one or more messages.

7. The method of claim 1, wherein the initiating comprises initiating selection of a network cell disparate from the designated network cell at a frequency band disparate from a frequency band associated with the designated network cell.

8. A wireless communications apparatus, comprising:

a memory that stores data relating to a designated network cell and a common communication channel associated with the designated network cell; and

a processor configured to

obtain one or more messages from the designated network cell over the common communication channel,

attempt decoding of the one or more messages,

track respective errors encountered during attempted decoding of the one or more messages, including maintain a count of erroneous messages encountered during attempted decoding of the one or more messages, and

initiate an avoidance procedure associated with barred network cells with respect to the designated network cell according to respective tracked errors encountered during the attempted decoding of the one or more messages, including initiate the avoidance procedure associated with barred network cells with respect to the designated network cell upon determining that the count exceeds a predetermined threshold.

9. The wireless communications apparatus of claim 8, wherein the common communication channel is a Common Control Channel (CCCH).

10. The wireless communications apparatus of claim 8, wherein the processor is further configured to track respective errors encountered during attempted decoding of the one or more messages at least in part by tracking respective messages in the one or more messages for which an associated abstract syntax is invalid.

11. The wireless communications apparatus of claim 8, wherein the count is a count of consecutive erroneous messages encountered during the attempted decoding of the one or more messages.

12. The wireless communications apparatus of claim 8, wherein the count is a count of erroneous messages encountered within a predefined time window during the attempted decoding of the one or more messages.

13. The wireless communications apparatus of claim 8, wherein the avoidance procedure associated with barred network cells comprises selection of a network cell disparate from the designated network cell at a frequency band disparate from a frequency band associated with the designated network cell.

14. An apparatus, comprising:

means for attempting acquisition of respective common messages from a network cell;

means for tracking errors encountered during attempted acquisition of the respective common messages, wherein the means for tracking comprises means for maintaining a count of erroneous messages encountered during attempted acquisition of the respective common messages; and

means for initiating reselection away from the network cell according to respective tracked errors encountered during attempted acquisition of the respective common messages, wherein the means for initiating reselection comprises means for initiating reselection away from the network cell upon determining that the count exceeds a predetermined threshold.

15. The apparatus of claim 14, wherein the respective common messages are associated with a Common Control Channel (CCCH).

16. The apparatus of claim 14, wherein the means for tracking comprises means for tracking respective common messages for which an associated abstract syntax is invalid.

17. The apparatus of claim 14, wherein the count comprises a count of consecutive erroneous messages encountered during attempted acquisition of the respective common messages.

18. The apparatus of claim 14, wherein the count comprises a count of erroneous messages encountered within a predefined time period during attempted acquisition of the respective common messages.

19. The apparatus of claim 14, wherein the means for initiating reselection comprises means for initiating reselection away from the network cell at a frequency band disparate from a frequency band associated with the network cell.

20. A computer program product, comprising:

a non-transitory computer-readable medium, comprising;

code for causing a computer to attempt acquisition of respective common messages from a network cell;

code for causing a computer to track errors encountered during attempted acquisition of the respective common messages, wherein the code for causing a computer to track comprises code for causing a computer to maintain a count of erroneous messages encountered during attempted acquisition of the respective common messages; and

code for causing a computer to initiate reselection away from the network cell according to respective tracked errors encountered during attempted acquisition of the respective common messages, wherein the code for causing a computer to initiate reselection comprises code for causing a computer to initiate reselection away from the network cell upon determining that the count exceeds a predetermined threshold.

21. The computer program product of claim 20, wherein the respective common messages are associated with a Common Control Channel (CCCH).

22. The computer program product of claim 20, wherein the code for causing a computer to track comprises code for causing a computer to track respective common messages for which an associated abstract syntax is invalid.

23. The computer program product of claim 20, wherein the count comprises a count of consecutive erroneous messages encountered during attempted acquisition of the respective common messages.

24. The computer program product of claim 20, wherein the count comprises a count of erroneous messages encountered within a predefined time period during attempted acquisition of the respective common messages.

25. The computer program product of claim 20, wherein the code for causing a computer to initiate reselection comprises code for causing a computer to initiate reselection away from the network cell at a frequency band disparate from a frequency band associated with the network cell.