Method and system for best-M CQI feedback together with PMI feedback

• US 8,195,184 B2
• Filed: 09/28/2007
• Issued: 06/05/2012
• Est. Priority Date: 04/30/2007
• 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
• Primary Examiner(s): LEE, JUSTIN YE
• Application Number:
  US11/864,661
• Publication Number:
  US 20080268862A1
• Time in Patent Office: 1,712 Days
• Field of Search: 455/452.2, 455/69, 455/68, 455/126, 455/24, 370/395.2, 370/395.21, 370/395.3, 370/395.31, 370/395.32, 370/395.4, 370/395.41, 370/395.42, 370/395.43
• US Class Current: 455/452.2
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04

Abstract

Aspects of a method and system for best-M CQI feedback together with PMI feedback may include generating a plurality of feedback messages, which may be communicated from a mobile station to a base station, wherein at least one of the generated plurality of feedback messages may be associated with each corresponding selected one of a plurality of Channel Quality Indicator (CQI) reporting units. The at least one of the generated feedback messages may comprise CQI information and Pre-coding Matrix Index (PMI) information, which may both be associated with the selected one of the plurality of CQI reporting units. At least one other of the generated plurality of feedback messages may comprise an aggregate CQI information, which is based on one or more of the plurality of CQI reporting units.

Claims

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

A processor generates a plurality of feedback messages, which is communicated from a mobile station to a base station, wherein;

at least one of said generated plurality of feedback messages is associated with a selected one of a plurality of Channel Quality Indicator (CQI) reporting units, said at least one of said generated feedback messages comprising CQI information and Pre-coding Matrix Index (PMI) information, which are both associated with said selected one of said plurality of CQI reporting units;

at least one other said generated plurality of feedback message comprising an aggregated CQI information, said aggregated CQI information based on one or more of said plurality of CQI reporting units; and

if a scheduled transmission does not correspond to a time-frequency interval of said selected one or more CQI reporting units;

a pre-coding matrix is generated based on one or more of said plurality of CQI reporting units,

said pre-coding matrix is generated based on an interpolation between a plurality of pre-coding matrices associated with a corresponding plurality of said selected one or more CQI reporting units,

said plurality of said selected one or more CQI reporting units are nearest to said scheduled transmission, according to a distance metric.

2. The method according to claim 1, comprising generating the aggregate CQI information based on an arithmetic mean of CQI information associated with the plurality of CQI reporting units.

3. The method according to claim 1, comprising generating the aggregate CQI information based on an arbitrary function of channel state information.

4. The method according to claim 1, wherein the distance metric is a difference in frequency and/or time.

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

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

generation of a plurality of feedback messages, which is communicated from a mobile station to a based station, wherein;

at least one of said generated plurality of feedback messages is associated with a selected one of a plurality of Channel Quality Indicator (CQI) reporting units, said at least one of said generated feedback messages comprising CQI information and Pre-coding Matrix Index (PMI) information, which are both associated with said selected one of said plurality of CQI reporting units; and

at least one other of said generated plurality of feedback message comprising an aggregate CQI information, said aggregate CQI information based on one or more of said plurality of CQI reporting units;

if a scheduled transmission does not corresponds to a time-frequency interval of a Channel Quality Indicator (CQI) reporting unit;

a pre-coding matrix is generated based on one or more of said plurality of CQI reporting units,

said pre-coding matrix is generated based on an interpolation between a plurality of pre-coding matrices associated with a corresponding plurality of said selected one or more CQI reporting units,

said plurality of said selected one or more CQI reporting units are nearest to said scheduled transmission, according to a distance metric.

6. The system according to claim 5, wherein the one or more circuits generate the aggregate CQI information based on an arithmetic mean of CQI information associated with the plurality of CQI reporting units.

7. The system according to claim 5, wherein the one or more circuits generate the aggregate CQI information based on an arbitrary function of channel state information.

8. The system according to claim 5, wherein the distance metric is a difference in frequency and/or time.

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

generating a plurality of feedback messages, which is communicated from a mobile station to a base station, wherein;

a first feedback message in the generated plurality of feedback messages is associated with a first Channel Quality Indicator (CQI) reporting unit of a plurality of CQI reporting units, the first feedback message comprising CQI information and Pre-coding Matrix Index (PMI) information, which are both associated with the first CQI reporting unit;

a second feedback message in the generated plurality of feedback message comprising aggregated CQI information, the aggregated CQI information based on one or more CQI reporting units of the plurality of CQI reporting units; and

if a scheduled transmission does not correspond to a time-frequency interval of any of the one or more CQI reporting units;

a pre-coding matrix is generated based on the one or more CQI reporting units,

the pre-coding matrix is generated based on an interpolation between a plurality of pre-coding matrices associated with a corresponding plurality of the one or more CQI reporting units,

the plurality of the one or more CQI reporting units are nearest to the scheduled transmission, according to a distance metric.

10. The method according to claim 9, wherein the distance metric is a difference in frequency and/or time.

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

one or more circuits, the one or more circuits enable;

generation of a plurality of feedback messages, which is communicated from a mobile station to a based station, wherein;

a first feedback message in the generated plurality of feedback messages is associated with a first Channel Quality Indicator (CQI) reporting unit of a plurality of CQI reporting units, the first feedback message comprising CQI information and Pre-coding Matrix Index (PMI) information, which are both associated with the first CQI reporting unit; and

a second feedback message in the generated plurality of feedback message comprising aggregate CQI information, the aggregate CQI information based on one or more CQI reporting units of the plurality of CQI reporting units;

if a scheduled transmission does not correspond to a time-frequency interval of any of the one or more CQI reporting units;

a pre-coding matrix is generated based on the one or more CQI reporting units,

the pre-coding matrix is generated based on an interpolation between a plurality of pre-coding matrices associated with a corresponding plurality of the one or more CQI reporting units,

the plurality of the one or more CQI reporting units are nearest to the scheduled transmission, according to a distance metric.

12. The system according to claim 11, wherein the distance metric is a difference in frequency and/or time.