CHANNEL QUALITY REPORTING FOR DIFFERENT TYPES OF SUBFRAMES

• US 20130301458A1
• Filed: 07/16/2013
• Published: 11/14/2013
• Est. Priority Date: 06/18/2010
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Barbieri, Alan, Vajapeyam, Madhavan Srinivasan, Ji, Tingfang
• Granted Patent: US 9,198,073 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04W 24/06 Testing, supervising or monitoring using simulated traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method for determining channel quality estimates of two or more types of subframes, such as clean and unclean subframes, may be applicable to both legacy and newer user equipment. A first base station affects a channel quality measurement by either transmitting dummy signals over designed tones that correspond to a second base station, or by puncturing transmissions during designated tones that correspond to the second base station.

Claims

1. A method for channel quality estimation in a wireless network, comprising:

indicating, to a user equipment (UE), to perform a plurality of channel quality measurements for at least two subbands in a subframe;

receiving, from the UE, a first channel quality report including a first channel quality measurement of a first subband and a second channel quality report including a second channel quality measurement of a second subband; and

determining separate channel quality measurements for a first subframe type and a second subframe type based on the first and second reports.

2. The method of claim 1, further comprising:

receiving, from the UE, a third channel quality report including a third channel quality measurement of a third subband; and

determining a channel quality measurement for a third subframe type based on the third report.

3. The method of claim 1, in which the first subframe type is a clean subframe and the second subframe type is an unclean subframe.

4. The method of claim 1, further comprising identifying a subframe in which the UE served by a second base station will perform a channel quality measurement, in which the identifying comprises at least one of:

negotiating over a backhaul with the second base station to identify the subframe; and

identifying the subframe according to a predetermined rule.

5. The method of claim 1, in which the first and second subbands are at least one of:

statically assigned, semi-statically negotiated among involved base stations, and

dynamically changing following predefined hopping patterns.

6. An apparatus for wireless communication, comprising:

means for indicating, to a user equipment (UE), to perform a plurality of channel quality measurements for at least two subbands in a subframe;

means for receiving, from the UE, a first channel quality report including a first channel quality measurement of a first subband and a second channel quality report including a second channel quality measurement of a second subband; and

means for determining separate channel quality measurements for a first subframe type and a second subframe type based on the first and second reports.

7. A computer program product for wireless communication in a wireless network, comprising:

a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising;

program code to indicate, to a user equipment (UE), to perform a plurality of channel quality measurements for at least two subbands in a subframe;

program code to receive, from the UE, a first channel quality report including a first channel quality measurement of a first subband and a second channel quality report including a second channel quality measurement of a second subband; and

program code to determine separate channel quality measurements for a first subframe type and a second subframe type based on the first and second reports.

8. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured;

to indicate, to a user equipment (UE), to perform a plurality of channel quality measurements for at least two subbands in a subframe;

to receive, from the UE, a first channel quality report including a first channel quality measurement of a first subband and a second channel quality report including a second channel quality measurement of a second subband; and

to determine separate channel quality measurements for a first subframe type and a second subframe type based on the first and second reports.

9. The apparatus of claim 8, in which the processor is further configured:

to receive, from the UE, a third channel quality report including a third channel quality measurement of a third subband; and

to determine a channel quality measurement for a third subframe type based on the third report.

10. The apparatus of claim 8, in which the first subframe type is a clean subframe and the second subframe type is an unclean subframe.

11. The apparatus of claim 8, in which the processor is further configured to perform at least one of:

negotiating over a backhaul with the second base station to identify the subframe; and

identifying the subframe according to a predetermined rule.

12. The apparatus of claim 8, in which the first and second subbands are at least one of:

statically assigned, semi-statically negotiated among involved base stations, and

dynamically changing following predefined hopping patterns.