METHOD AND APPARATUS FOR INTERACTION OF FAST OTHER SECTOR INTERFERENCE (OSI) WITH SLOW OSI

• US 20080117849A1
• Filed: 08/31/2007
• Published: 05/22/2008
• Est. Priority Date: 09/08/2006
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kannan, Arumugam Chendamari, Gorokhov, Alexei, Khandekar, Aamod, Ji, Tingfang, Borran, Mohammad J.
• Application Number:
  US11/848,664
• Publication Number:
  US 20080117849A1
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/243 taking into account interferences

Abstract

Systems and methodologies are described that provide techniques for generating and utilizing reverse link feedback for interference management in a wireless communication system. Other Sector Interference (OSI) indicators are transmitted from an interfering access point to an access terminal. At the access terminal, an appropriate delta value(s) is combined with the received OSI indicators. The combined information is transmitted to the access point in a feedback so the serving sector access point can analyze the amount of interference. Based on the provided feedback from the terminal, the serving sector access point can assign resources for use by the terminal in communication with the serving sector.

Claims

1. A method for providing feedback for power control in a wireless communication system, comprising:

receiving one or more other sector interference (OSI) indications from one or more neighboring access points;

maintaining one or more delta values based on the received one or more OSI indications; and

adjusting a resource used for transmissions to a serving access point based at least in part on the delta values.

2. The method of claim 1, wherein the receiving includes receiving slow OSI indications once per superframe.

3. The method of claim 1, wherein the receiving includes receiving fast OSI indications once per frame.

4. The method of claim 1, wherein the adjusting includes adjusting a bandwidth used for transmissions to the serving access point.

5. The method of claim 1, further comprising transmitting one or more delta values to the serving access point.

6. The method of claim 1, wherein the adjusting includes adjusting a power used for transmissions to the serving access point.

7. The method of claim 6, wherein the adjusting a power used for transmissions to the serving access point includes adjusting the power by adding one or more of the delta values to a reference power level.

8. The method of claim 1, wherein the delta values comprise at least one slow delta value and at least one fast delta value.

9. The method of claim 8, further comprising providing the slow delta value as feedback to the serving access point.

10. The method of claim 8, wherein the adjusting includes adjusting a resource used for transmissions to a serving access point based at least in part on the fast delta value.

11. The method of claim 8, wherein the delta values comprise a plurality of fast delta values that correspond to respective reverse link interlaces.

12. The method of claim 8, wherein the maintaining includes limiting a maximum change to a fast delta value based on the OSI indications to a slow delta value.

13. The method of claim 1, further comprising:

calculating a channel quality difference between the neighboring access point and the serving access point; and

determining whether to respond to an OSI indication based on the channel quality difference.

21. The wireless communications apparatus of claim 13, wherein the processor is further configured to modify a transmit power based at least in part on the delta values.

22. The wireless communications apparatus of claim 13, wherein the processor is further configured to modify a bandwidth based at least in part on the delta values.

14. A wireless communications apparatus, comprising:

a memory that stores data relating to one or more OSI indications received from one or more non-serving sectors and one or more delta values; and

a processor configured to adjust the delta values based on the one or more OSI indications and to modify a parameter for transmissions to a serving sector based at least in part on the delta values.

15. The wireless communications apparatus of claim 14, wherein the processor is further configured to compute a new transmit power by adding a delta to a reference power level.

16. The wireless communications apparatus of claim 14, wherein the fast OSI indications are received by the wireless communications apparatus once per frame.

17. The wireless communications apparatus of claim 14, wherein the memory further stores data relating to at least one slow delta value and at least one fast delta value.

18. The wireless communications apparatus of claim 17, wherein the processor is further configured to instruct transmission of a slow delta value to the serving sector.

19. The wireless communications apparatus of claim 17, wherein the processor is further configured to adjust a fast delta value based on the fast OSI indication.

20. The wireless communications apparatus of claim 17, wherein the memory further stores data relating to a plurality of fast delta values, the fast delta values correspond to respective reverse link interlaces.

23. An apparatus that facilitates reverse link power control and interference management in a wireless communication system, comprising:

means for receiving one or more OSI indications from one or more non-serving sectors;

means for adjusting one or more delta values based on the one or more OSI indications; and

means for modifying one or more communication resources based at least in part on the delta values.

24. The apparatus of claim 23, wherein the means for modifying one or more communication resources includes means for modifying a transmit power level at least in part by adding a delta value to a reference power level.

25. The apparatus of claim 23, wherein the delta values comprise at least one slow delta value and at least one fast delta value.

26. The apparatus of claim 25, wherein the means for adjusting one or more delta values includes means for adjusting a fast delta value based on a fast OSI indication.

27. The apparatus of claim 25, wherein the means for adjusting one or more delta values includes means for employing a slow delta value as a limit for a maximum change to a fast delta value.

28. A computer-readable storage medium, comprising:

code for causing a computer to receive one or more OSI indications from one or more non-serving base stations;

code for causing a computer to modify one or more delta values based at least in part on the one or more OSI indications; and

code for causing a computer to compute one or more of a bandwidth and a transmit power for communication with a serving base station based at least in part on the delta values.

29. The computer-readable storage medium of claim 28, wherein the code for causing a computer to receive includes code for causing a computer to receive a slow OSI indication on respective superframes.

30. The computer-readable storage medium of claim 28, wherein the code for causing a computer to compute includes code for causing a computer to compute a transmit power at least in part by adding a delta value to a reference power level.

31. The computer-readable storage medium of claim 28, further comprising code for causing a computer to transmit one or more modified delta values to the serving base station.

32. The computer-readable storage medium of claim 28, further comprising:

code for causing a computer to calculate a difference in channel quality between the non-serving base station and the serving base station; and

code for causing a computer to determine whether to respond to an OSI indication based on the difference in channel quality.

33. An integrated circuit that executes computer-executable instructions for interference control in a wireless communication system, the instructions comprising:

maintaining a reference power level;

receiving one or more OSI indications;

adjusting one or more delta values based on the received one or more OSI indications; and

computing a transmit power at least in part by adding one or more of the delta values to the reference power level.

34. The integrated circuit of claim 33, wherein the receiving includes receiving a slow OSI indication on respective superframes.

35. The integrated circuit of claim 33, wherein the receiving includes receiving a fast OSI indication on respective frames.

36. The integrated circuit of claim 33, the instructions further comprising:

calculating a channel quality difference between a serving sector and one or more sectors from which the OSI indications are received; and

determining whether to respond to an OSI indication based at least in part on the channel quality difference.

37. The integrated circuit of claim 33, wherein the adjusting includes adjusting at least one slow delta value and at least one fast delta value.

38. The integrated circuit of claim 37, wherein the adjusting includes adjusting a plurality of fast delta values corresponding to respective reverse link interlaces.