METHODS AND APPARATUS FOR EVENT REPORTING BASED SPURIOUS DPCH REMOVAL IN SOFT HANDOVER

• US 20150163710A1
• Filed: 05/22/2014
• Published: 06/11/2015
• Est. Priority Date: 12/06/2013
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: ZHANG, Wei, Chizgi, Nate, Shah, Sagar Bharatkumar, Alnatsheh, Rami Hmeidan, Matin, Sharif Ahsanul, Marwah, Vijay
• Application Number:
  US14/285,381
• Publication Number:
  US 20150163710A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04W 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection

Abstract

Methods and apparatus for event reporting based spurious dedicated physical channel (DPCH) removal in soft handover include user equipment (UE) management of spurious channels. In one aspect, the disclosure provides methods and apparatus for wireless communication that may include determining that a dedicated physical channel (DPCH) is spurious, removing the DPCH from soft combining, and sending a report indicating that a cell associated with the DPCH is unavailable. Further, the methods and apparatus may include incrementing a counter for the cell associated with the DPCH in response to removing the DPCH, determining whether the counter exceeds a removal threshold, and increasing a time to trigger for sending a report to add the cell to an active set in response to the counter exceeding the removal threshold. A cell associated with a removed DPCH may also be excluded from measurements of a current frequency.

Claims

1. A method for wireless communication, comprising:

determining that a dedicated physical channel (DPCH) is spurious;

removing the DPCH from soft combining; and

sending a report indicating that a cell associated with the DPCH is unavailable.

2. The method of claim 1, further comprising:

incrementing a counter for the cell associated with the DPCH in response to removing the DPCH;

determining whether the counter exceeds a removal threshold; and

increasing a time to trigger for sending a report to add the cell to an active set in response to the counter exceeding the removal threshold.

3. The method of claim 2, further comprising removing the cell from measurements of a current frequency.

4. The method of claim 1, wherein determining that the DPCH is spurious comprises determining that a quality measurement of a common pilot channel (CPICH) of the cell is greater than a quality threshold and a quality measurement of the DPCH for the cell is less than a quality threshold.

5. The method of claim 1, wherein determining that the DPCH is spurious comprises determining a ratio of a quality measurement of a common pilot channel (CPICH) of the cell to a quality measurement of the DPCH of the cell.

6. The method of claim 1, wherein determining that the DPCH is spurious comprises determining that a quality measurement of the DPCH for the cell is less than the quality measurement of a DPCH for a plurality of other cells in an active set.

7. The method of claim 1, wherein determining that a DPCH is spurious comprises determining that the DPCH contributes negatively to soft combining.

8. The method of claim 1, further comprising receiving an active set update command indicating that a cell corresponding to the spurious DPCH has been removed from an active set in response to the report.

9. The method of claim 1, wherein sending the report indicating that a cell associated with the DPCH is unavailable occurs despite receiving a CPICH for the cell satisfying a quality threshold.

10. An apparatus for wireless communication, comprising:

means for determining that a dedicated physical channel (DPCH) is spurious;

means for removing the DPCH from soft combining; and

means for sending a report indicating that a cell associated with the DPCH is unavailable.

11. The apparatus of claim 10, further comprising:

means for incrementing a counter for the cell associated with the DPCH in response to removing the DPCH;

means determining whether the counter exceeds a removal threshold; and

means increasing a time to trigger for sending a report to add the cell to an active set in response to the counter exceeding the removal threshold.

12. The apparatus of claim 11, further comprising means for removing the cell from measurements of a current frequency.

13. The apparatus of claim 10, wherein determining that the DPCH is spurious comprises determining that a common pilot channel (CPICH) of a cell is greater than a quality threshold and the DPCH for the cell is less than a quality threshold.

14. The apparatus of claim 10, wherein determining that the DPCH is spurious comprises determining that a quality measurement of the DPCH for the cell is less than the quality measurement of a DPCH for a plurality of other cells in an active set.

15. The apparatus of claim 10, wherein determining that the DPCH is spurious comprises determining that the DPCH contributes negatively to signal strength.

16. The apparatus of claim 10, further comprising receiving an active set update command indicating that the cell corresponding to the spurious DPCH has been removed from an active set in response to the report.

17. A computer program product, having a non-transitory computer-readable medium comprising:

code for causing a computer to determine that a dedicated physical channel (DPCH) is spurious;

code for causing the computer to remove the DPCH from soft combining; and

code for causing the computer to send a report indicating that a cell associated with the DPCH is unavailable.

18. The computer program product of claim 17, further comprising:

code for causing the computer to increment a counter for the cell associated with the DPCH in response to removing the DPCH;

code for causing the computer to determine whether the counter exceeds a removal threshold; and

code for causing the computer to increase a time to trigger for sending a report to add the DPCH to an active set in response to the counter exceeding the removal threshold.

19. The computer program product of claim 18, further comprising code for causing the computer to remove the cell from measurements of a current frequency.

20. The computer program product of claim 17, wherein the code for causing the computer to determine that a DPCH is spurious comprises code for causing the computer to determine that a common pilot channel (CPICH) of a cell is greater than a quality threshold and the DPCH for the cell is less than a quality threshold.

21. The computer program product of claim 17, wherein the code for causing the computer to determine that a DPCH is spurious comprises code for causing the computer to determine that a quality measurement of the DPCH for a cell is less than the quality measurement of a DPCH for a plurality of other cells in an active set.

22. An apparatus for wireless communication, comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured to;

determine that a dedicated physical channel (DPCH) is spurious;

remove the DPCH from soft combining; and

send a report indicating that a cell associated with the DPCH is unavailable.

23. The apparatus of claim 22, wherein the at least one processor is further configured to:

increment a counter for the cell associated with the DPCH in response to removing the DPCH;

determine whether the counter exceeds a removal threshold; and

increase a time to trigger for sending a report to add the cell to an active set in response to the counter exceeding the removal threshold.

24. The apparatus of claim 23, further comprising removing the cell from measurements for a current frequency.

25. The apparatus of claim 22, wherein determining that the DPCH is spurious comprises determining that a quality measurement of a common pilot channel (CPICH) of the cell is greater than a quality threshold and a quality measurement for the DPCH for the cell is less than a quality threshold.

26. The apparatus of claim 24, wherein the processor is configured to determine that the DPCH is spurious based on a ratio of a quality measurement of a common pilot channel (CPICH) of the cell to a quality measurement of the DPCH of the cell.

27. The apparatus of claim 22, wherein determining that the DPCH is spurious comprises determining that a quality of the DPCH for the cell is less than the quality of a DPCH for a plurality of other cells in an active set.

28. The apparatus of claim 22, wherein determining that the DPCH is spurious comprises determining that the DPCH contributes negatively to soft combining.

29. The apparatus of claim 22, wherein the processor is configured to send the report indicating that a cell associated with the DPCH is unavailable despite the CPICH for the cell satisfying a quality threshold.

30. The apparatus of claim 22, wherein the processor is further configured to receive an active set update command indicating that the cell corresponding to the spurious DPCH has been removed from an active set in response to the report.