Methods and apparatus for assignment dependent downlink channel processing for wireless networks

• US 9,161,364 B2
• Filed: 12/13/2012
• Issued: 10/13/2015
• Est. Priority Date: 12/21/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chen, Wanshi, Luo, Tao, Damnjanovic, Aleksandar
• Primary Examiner(s): Lee, Andrew
• Application Number:
  US13/713,062
• Publication Number:
  US 20130163529A1
• Time in Patent Office: 1,034 Days
• Field of Search: 370/252, 370/328, 370/329, 370/465
• US Class Current: 1/1
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

Aspects of the present disclosure relates generally to communication systems, and more particularly, to apparatus and techniques for handling, within resources of an assigned channel, different availability of interference. Aspects generally include determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference, and selecting different techniques for processing the different portions of the resources, wherein each technique is selected based on the corresponding level or type of interference. In aspects, a fixed pattern or amount of interference for the resources may be selected based on the different levels or the different types of interference and a technique for processing the resources is selected, wherein the technique is selected based on the selected fixed pattern or amount of interference.

Claims

1. A method for wireless communications, comprising:

determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference; and

selecting different techniques for processing the different portions of the resources, wherein each technique is selected based at least on a corresponding level or type of interference.

2. The method of claim 1, further comprising:

decoding the downlink channel by processing the different portions of the resources using the corresponding selected techniques.

3. The method of claim 1, wherein at least a first portion of the resources is subject to interference related to common reference signals (CRSs) from one or more interfering cells.

4. The method of claim 3, wherein selecting the different techniques for processing the different portions of the resources comprises:

selecting a technique to reduce the interference in the first portion of the resources.

5. The method of claim 3, wherein:

a second portion of the resources includes little or no CRS transmissions.

6. The method of claim 1, wherein:

the resources for the assigned downlink channel span a plurality of carriers; and

interference is reduced for a portion of the resources in at least one of the plurality of carriers.

7. The method of claim 6, wherein:

a first technique is selected for processing the portion of the resources in which interference is reduced; and

at least a second technique is selected for processing one or more other portions of the resources.

8. The method of claim 7, wherein the second technique comprises at least one of interference cancellation, puncturing, rate matching, or no interference reduction.

9. The method of claim 1, wherein each technique is selected further based on at least one of a subframe type, a carrier type, a common reference signal (CRS) configuration, bandwidths of cells, or a number of CRS ports.

10. The method of claim 1, wherein determining the different portions of the resources comprises receiving signaling indicating the different portions.

11. The method of claim 1, wherein determining the different portions of the resources comprises performing blind detection of resources for the assigned downlink channel.

12. The method of claim 1, wherein the different techniques comprise a plurality of interference cancellation, puncturing, rate matching, or no interference reduction.

13. The method of claim 1, wherein the different portions of the resources comprise:

a first portion of the resources associated with a first symbol in a subframe from a carrier; and

a second portion of the resources associated with a second symbol in the subframe from the carrier.

14. The method of claim 1, wherein the downlink channel is a data channel or a control channel.

15. The method of claim 1, wherein the different portions of the resources that are subject to the at least one of different levels or different types of interference reside in different portions of bandwidth that are subject to the at least one of different levels or different types of interference.

16. A method for wireless communications, comprising:

determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference;

selecting a fixed pattern or amount of interference for the resources based on the different levels or the different types of interference, wherein the fixed pattern or amount of interference comprises one or more interference levels that are greater than one or more of the different levels of interference; and

selecting a technique for processing the resources, wherein the technique is selected based on the selected fixed pattern or amount of interference.

17. The method of claim 16, further comprising:

decoding the downlink channel by processing the resources using the selected technique.

18. The method of claim 16, wherein:

the resources for the assigned downlink channel span a plurality of carriers; and

interference is reduced for the resources in at least one of the plurality of carriers.

19. The method of claim 16, wherein the technique is selected further based on at least one of a subframe type, a carrier type, a common reference signal (CRS) configuration, bandwidths of cells, or a number of CRS ports.

20. The method of claim 16, wherein determining the different portions of the resources comprise receiving signaling indicating the different portions.

21. The method of claim 16, wherein determining the different portions of the resources comprise performing blind detection of resources for the assigned downlink channel.

22. The method of claim 16, wherein the technique comprises one or more of interference cancellation, puncturing, rate matching, or no interference reduction.

23. The method of claim 16, wherein the different portions of the resources that are subject to the at least one of different levels or different types of interference reside in different portions of bandwidth that are subject to the at least one of different levels or different types of interference.

24. An apparatus for wireless communications, comprising:

means for determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference; and

means for selecting different techniques for processing the different portions of the resources, wherein each technique is selected based at least on a corresponding level or type of interference.

25. The apparatus of claim 24, further comprising:

means for decoding the downlink channel by processing the different portions of the resources using the corresponding selected techniques.

26. The apparatus of claim 24, wherein at least a first portion of the resources is subject to interference related to common reference signals (CRSs) from one or more interfering cells.

27. The apparatus of claim 26, wherein the means for selecting the different techniques for processing the different portions of the resources comprises:

means for selecting a technique to reduce the interference in the first portion of the resources.

28. The apparatus of claim 26, wherein:

a second portion of the resources includes little or no CRS transmissions.

29. The apparatus of claim 24, wherein:

the resources for the assigned downlink channel span a plurality of carriers; and

interference is reduced for a portion of the resources in at least one of the plurality of carriers.

30. The apparatus of claim 29, wherein:

a first technique is selected for processing the portion of the resources in which interference is reduced; and

at least a second technique is selected for processing one or more other portions of the resources.

31. The apparatus of claim 30, wherein the second technique comprises at least one of interference cancellation, puncturing, rate matching, or no interference reduction.

32. The apparatus of claim 24, wherein each technique is selected further based on at least one of a subframe type, a carrier type, a common reference signal (CRS) configuration, bandwidths of cells, or a number of CRS ports.

33. The apparatus of claim 24, wherein the means for determining the different portions of the resources comprises means for receiving signaling indicating the different portions.

34. The apparatus of claim 24, wherein the means for determining the different portions of the resources comprises means for performing blind detection of resources for the assigned downlink channel.

35. The apparatus of claim 24, wherein the different techniques comprise a plurality of interference cancellation, puncturing, rate matching, or no interference reduction.

36. The apparatus of claim 24, wherein the different portions of the resources comprise:

a first portion of the resources associated with a first symbol in a subframe from a carrier; and

a second portion of the resources associated with a second symbol in the subframe from the carrier.

37. The apparatus of claim 24, wherein the downlink channel is a data channel or a control channel.

38. The apparatus of claim 24, wherein the different portions of the resources that are subject to the at least one of different levels or different types of interference reside in different portions of bandwidth that are subject to the at least one of different levels or different types of interference.

39. An apparatus for wireless communications, comprising:

means for determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference;

means for selecting a fixed pattern or amount of interference for the resources based on the different levels or the different types of interference, wherein the fixed pattern or amount of interference comprises one or more interference levels that are greater than one or more of the different levels of interference; and

means for selecting a technique for processing the resources, wherein the technique is selected based on the selected fixed pattern or amount of interference.

40. The apparatus of claim 39, further comprising:

means for decoding the downlink channel by processing the resources using the selected technique.

41. The apparatus of claim 39, wherein:

the resources for the assigned downlink channel span a plurality of carriers; and

interference is reduced for the resources in at least one of the plurality of carriers.

42. The apparatus of claim 39, wherein the technique is selected further based on at least one of a subframe type, a carrier type, a common reference signal (CRS) configuration, bandwidths of cells, or a number of CRS ports.

43. The apparatus of claim 39, wherein the means for determining the different portions of the resources comprise receiving signaling indicating the different portions.

44. The apparatus of claim 39, wherein the means for determining the different portions of the resources comprise means for performing blind detection of resources for the assigned downlink channel.

45. The apparatus of claim 39, wherein the technique comprises one or more of interference cancellation, puncturing, rate matching, or no interference reduction.

46. The apparatus of claim 39, wherein the different portions of the resources that are subject to the at least one of different levels or different types of interference reside in different portions of bandwidth that are subject to the at least one of different levels or different types of interference.

47. A computer-program product for wireless communications, comprising a non-transitory computer readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:

instructions for determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference; and

instructions for selecting different techniques for processing the different portions of the resources, wherein each technique is selected based at least on a corresponding level or type of interference.

48. A computer-program product for wireless communications, comprising a non-transitory computer readable medium having instructions stored thereon, the instructions being executable by one or more processors and the instructions comprising:

instructions for determining different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference;

instructions for selecting a fixed pattern or amount of interference for the resources based on the different levels or the different types of interference, wherein the fixed pattern or amount of interference comprises one or more interference levels that are greater than one or more of the different levels of interference; and

instructions for selecting a technique for processing the resources, wherein the technique is selected based on the selected fixed pattern or amount of interference.

49. An apparatus for wireless communications, comprising:

at least one processor configured to;

determine different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference, and

select different techniques for processing the different portions of the resources, wherein each technique is selected based at least on a corresponding level or type of interference; and

a memory coupled to the at least one processor.

50. An apparatus for wireless communications, comprising:

at least one processor configured to;

determine different portions of resources for an assigned downlink channel that are subject to at least one of different levels or different types of interference,

select a fixed pattern or amount of interference for the resources based on the different levels or the different types of interference, wherein the fixed pattern or amount of interference comprises one or more interference levels that are greater than one or more of the different levels of interference, and

select a technique for processing the resources, wherein the technique is selected based on the selected fixed pattern or amount of interference; and

a memory coupled to the at least one processor.