METHOD AND SYSTEM FOR ADAPTIVE ALLOCATION OF FEEDBACK RESOURCES FOR CQI AND TRANSMIT PRE-CODING

• US 20120082128A1
• Filed: 12/07/2011
• Published: 04/05/2012
• Est. Priority Date: 03/21/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Kent, Mark, Erceg, Vinko, Zheng, Jun, Ariyavisitakul, Sirikiat
• Granted Patent: US 9,036,516 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

In transmit pre-coding, a bandwidth and a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units are assigned, respectively. Sub-divisions in time and/or frequency corresponding to the assigned bandwidths and the assigned feedback periods are dynamically adjusted based at least on uplink channel state information corresponding to the bandwidth and the feedback period assigned to the CQI reporting units, and the bandwidth and the feedback period assigned to the PMI reporting units. One or more feedback messages are generated based at least on the channel state information over the adjusted sub-divisions in time and/or frequency corresponding to the CQI reporting units and to the PMI reporting units, respectively. The bandwidth and/or the feedback period may be assigned based on the channel state information or as a function of a feedback rate.

Claims

1-24. -24. (canceled)

25. A method for processing communication signals, the method comprising:

assigning a bandwidth and a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units;

dynamically adjusting sub-divisions in time and/or frequency corresponding to said bandwidth and said feedback period assigned to said one or more CQI reporting units and said bandwidth and said feedback period assigned to said one or more PMI reporting units based at least on uplink channel state information corresponding to said bandwidth and said feedback period assigned to said one or more CQI reporting units and to said bandwidth and said feedback period assigned to said one or more PMI reporting units; and

generating one or more feedback messages based at least on said uplink channel state information over said adjusted sub-divisions in time and/or frequency corresponding to said bandwidth and said feedback period assigned to said one or more CQI reporting units and to said bandwidth and said feedback period assigned to said one or more PMI reporting units.

26. The method according to claim 25, comprising dynamically adjusting said bandwidth and said feedback period of said CQI reporting units and/or said PMI reporting units.

27. The method according to claim 25, comprising adaptively adjusting said bandwidth and said feedback period of said CQI reporting units and/or said PMI reporting units.

28. The method according to claim 25, comprising assigning said bandwidth and/or said feedback periods based on uplink channel state information.

29. The method according to claim 25, comprising assigning said bandwidth and/or said feedback periods as a function of a feedback rate.

30. The method according to claim 25, wherein said associated uplink channel state information comprises channel measurements associated with said assigned bandwidth and said assigned feedback periods.

31. The method according to claim 30, comprising processing said uplink channel state information by averaging said channel measurements.

32. The method according to claim 30, comprising processing said uplink channel state information by an arbitrary function of said channel measurements.

33. The method according to claim 25, wherein said one or more feedback messages for said one or more CQI reporting units comprise modulation and coding levels.

34. The method according to claim 25, wherein said one or more feedback messages for said one or more CQI reporting units comprise Signal-to-Noise-and-Interference Ratios (SINR).

35. The method according to claim 25, wherein said one or more feedback messages for said one or more PMI reporting units comprise one or more indices into a codebook.

36. The method according to claim 25, wherein said one or more feedback messages for said one or more PMI reporting units comprise one or more matrices.

37. A system for processing communication signals, the system comprising:

one or more circuits, said one or more circuits enable;

assignment of a bandwidth and of a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units;

dynamically adjustment of sub-divisions in time and/or frequency corresponding to said bandwidth and said feedback period assigned to said one or more CQI reporting units and said bandwidth and said feedback period assigned to said one or more PMI reporting units based at least on uplink channel state information corresponding to said bandwidth and said feedback period assigned to said one or more CQI reporting units and to said bandwidth and said feedback period assigned to said one or more PMI reporting units; and

generation of one or more feedback messages based at least on said uplink channel state information over said adjusted sub-divisions in time and/or frequency corresponding to said bandwidth and said feedback period assigned to said one or more CQI reporting units and to said bandwidth and said feedback period assigned to said one or more PMI reporting units.

38. The system according to claim 37, wherein said one or more circuits dynamically adjust said bandwidth and said feedback period of said CQI reporting units and/or said PMI reporting units.

39. The system according to claim 37, wherein said one or more circuits adaptively adjust said bandwidth and said feedback period of said CQI reporting units and/or said PMI reporting units.

40. The system according to claim 37, wherein said one or more circuits assign said bandwidth and/or said feedback periods based on uplink channel state information.

41. The system according to claim 37, wherein said one or more circuits assign said bandwidth and/or said feedback periods as a function of a feedback rate.

42. The system according to claim 37, wherein said associated uplink channel state information comprises channel measurements associated with said assigned bandwidth and said assigned feedback periods.

43. The system according to claim 42, wherein said one or more circuits process said uplink channel state information by averaging said channel measurements.

44. The system according to claim 42, wherein said one or more circuits process said uplink channel state information by an arbitrary function of said channel measurements.

45. The system according to claim 37, wherein said one or more feedback messages for said one or more CQI reporting units comprise modulation and coding levels.

46. The system according to claim 37, wherein said one or more feedback messages for said one or more CQI reporting units comprise Signal-to-Noise-and-Interference Ratios (SINR).

47. The system according to claim 37, wherein said one or more feedback messages for said one or more PMI reporting units comprise one or more indices into a codebook.

48. The system according to claim 37, wherein said one or more feedback messages for said one or more PMI reporting units comprise one or more matrices.