Granted Patent B2

US 12,457,025 · App. 17/999,673 · Granted Oct 28, 2025

Inventors: Min Huang (Beijing, CN); Yu Zhang (San Diego, CA); Chao Wei (Beijing, CN)

Assignee: QUALCOMM Incorporated

H04B7/0695H04B7/0626

Abstract

Claims (106)

1. A method of wireless communication operable at a user equipment (UE) configured for operation in a cell configured for downlink beamforming over a plurality of directional beams, the method comprising:

receiving a first reference signal on a downlink resource;

selecting a beam corresponding to one or more directional beams of the plurality of directional beams, based on a set of one or more channel characteristics that are based on the first reference signal; and

transmitting a report identifying the selected beam, including indicating a direction of the selected beam and indicating an angular width of the selected beam, wherein the direction of the selected beam is indicated based on a codeword from a codebook that maps a plurality of codewords to the plurality of directional beams and wherein the codeword corresponds to a vertical beam component of the selected beam and a horizontal beam component of the selected beam.

2. The method of claim 1 , further comprising:

selecting a first codeword, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

including the first codeword in the transmitted report to indicate the direction of the selected beam.

3. The method of claim 1 , further comprising:

selecting a subset of two or more codewords, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams, and

indicating the direction of the selected beam, including expressing the direction as a combination of the subset of two or more codewords in the transmitted report.

4. The method of claim 1 , further comprising:

selecting the angular width of the selected beam to cover the one or more directional beams of the plurality of directional beams; and

indicating the angular width of the selected beam by at least one selected from a group of:

including a first parameter corresponding to the horizontal component of the selected beam and a second parameter corresponding to the vertical component of the selected beam in the transmitted report, and

indicating the angular width of the selected beam, including indicating information about a number of directional beams included in the one or more directional beams.

5. The method of claim 1 , further comprising:

selecting a plurality of wide beams, including the selected beam, corresponding to a plurality of layers,

wherein the report further identifies the selected plurality of wide beams, including indicating a respective direction and a respective angular width of respective beams of the plurality of wide beams.

6. The method of claim 1 , further comprising:

receiving a second reference signal on a downlink transmission configured according to the transmitted report; and

transmitting a second report comprising at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI) based on a second set of one or more channel characteristics that are based on the second reference signal.

7. The method of claim 1 , further comprising:

receiving a report configuration message comprising information indicating whether the transmitted report should include one or more of:

a wide beam corresponding to one or more directional beams; or

a narrow beam corresponding to a selected directional beam of the plurality of directional beams.

8. The method of claim 1 , further comprising:

determining, based on a moving status of the UE, whether the transmitted report should include one or more of:

a wide beam corresponding to one or more directional beams; or

a narrow beam corresponding to a selected directional beam of the plurality of directional beams.

9. The method of claim 1 , wherein the report comprises an indication whether the selected beam is a wide beam corresponding to one or more directional beams, or a narrow beam corresponding to a selected directional beam of the plurality of directional beams.

10. A user equipment (UE) configured for wireless communication in a cell configured for downlink beamforming over a plurality of directional beams, the UE comprising:

means for receiving a first reference signal on a downlink resource;

means for selecting a beam corresponding to one or more directional beams of the plurality of directional beams, based on a set of one or more channel characteristics that are based on the first reference signal; and

means for transmitting a report identifying the selected beam, including indicating a direction of the selected beam and indicating an angular width of the selected beam, wherein the direction of the selected beam is indicated based on a codeword from a codebook that maps a plurality of codewords to the plurality of directional beams and wherein the codeword corresponds to a vertical beam component of the selected beam and a horizontal beam component of the selected beam.

11. The UE of claim 10 , further comprising:

means for selecting a first codeword, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

means for including the first codeword in the transmitted report to indicate the direction of the selected beam.

12. The UE of claim 10 , further comprising:

means for selecting a subset of two or more codewords, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

means for indicating the direction of the selected beam, including expressing the direction as a combination of the subset of two or more codewords in the transmitted report.

13. The UE of claim 10 , further comprising:

means for selecting the angular width of the selected beam to cover the one or more directional beams of the plurality of directional beams; and

means for indicating the angular width of the selected beam by at least one selected from a group of:

including a first parameter corresponding to the horizontal component of the selected beam and a second parameter corresponding to the vertical component of the selected beam in the transmitted report, and

indicating information about a number of directional beams included in the one or more directional beams.

14. The UE of claim 10 , further comprising:

means for selecting a plurality of wide beams, including the selected beam, corresponding to a plurality of layers,

wherein the report further identifies the selected plurality of wide beams, including indicating a respective direction and a respective angular width of respective beams of the plurality of wide beams.

15. The UE of claim 10 , further comprising:

means for receiving a second reference signal on a downlink transmission configured according to the transmitted report; and

means for transmitting a second report comprising at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI) based on a second set of one or more channel characteristics that are based on the second reference signal.

16. A non-transitory computer-readable medium storing computer-executable code, operable at a user equipment (UE) configured for operation in a cell configured for downlink beamforming over a plurality of directional beams, comprising code for causing the UE to:

receive a first reference signal on a downlink resource;

select a beam corresponding to one or more directional beams of the plurality of directional beams, based on a set of one or more channel characteristics that are based on the first reference signal; and

transmit a report identifying the selected beam, including indicating a direction of the selected beam and indicating an angular width of the selected beam, wherein the direction of the selected beam is indicated based on a codeword from a codebook that maps a plurality of codewords to the plurality of directional beams and wherein the codeword corresponds to a vertical beam component of the selected beam and a horizontal beam component of the selected beam.

17. The non-transitory computer-readable medium of claim 16 , wherein the computer-executable code further comprises code for causing the UE to:

select a first codeword, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

include the first codeword in the transmitted report to indicate the direction of the selected beam.

18. The non-transitory computer-readable medium of claim 16 , wherein the computer-executable code further comprises code for causing the UE to:

select a subset of two or more codewords, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

indicate the direction of the selected beam, including expressing the direction as a combination of the subset of two or more codewords in the transmitted report.

19. The non-transitory computer-readable medium of claim 16 , wherein the computer-executable code further comprises code for causing the UE to:

select the angular width of the selected beam to cover the one or more directional beams of the plurality of directional beams; and

indicate the angular width of the selected beam by at least one selected from a group of:

including a first parameter corresponding to the horizontal component of the selected beam and a second parameter corresponding to the vertical component of the selected beam in the transmitted report, and

indicating information about a number of directional beams included in the one or more directional beams.

20. The non-transitory computer-readable medium of claim 16 , wherein the computer-executable code further comprises code for causing the UE to:

select a plurality of wide beams, including the selected beam, corresponding to a plurality of layers,

wherein the report further identifies the selected plurality of wide beams, including indicating a respective direction and a respective angular width of respective beams of the plurality of wide beams.

21. The non-transitory computer-readable medium of claim 16 , wherein the computer-executable code further comprises code for causing the UE to:

receive a second reference signal on a downlink transmission configured according to the transmitted report; and

transmit a second report comprising at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI) based on a second set of one or more channel characteristics that are based on the second reference signal.

22. A user equipment (UE) configured for wireless communication in a cell configured for downlink beamforming over a plurality of directional beams, the UE comprising:

a processor;

a transceiver communicatively coupled to the processor; and

a memory communicatively coupled to the processor,

wherein the processor and the memory are configured to:

receive, via the transceiver, a first reference signal on a downlink resource;

select a beam corresponding to one or more directional beams of the plurality of directional beams based on a set of one or more channel characteristics that are based on the first reference signal; and

transmit, via the transceiver, a report identifying the selected beam, including indicating a direction of the selected beam and indicating an angular width of the selected beam, wherein the direction of the selected beam is indicated based on a codeword from a codebook that maps a plurality of codewords to the plurality of directional beams and wherein the codeword corresponds to a vertical beam component of the selected beam and a horizontal beam component of the selected beam.

23. The UE of claim 22 , wherein the processor and the memory are further configured to:

select a first codeword, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

include the first codeword in the transmitted report to indicate the direction of the selected beam.

24. The UE of claim 22 , wherein the processor and the memory are further configured to:

select a subset of two or more codewords, corresponding to the selected beam, from the codebook that maps a plurality of codewords to the plurality of directional beams; and

indicate the direction of the selected beam, including expressing the direction as a combination of the subset of two or more codewords in the transmitted report.

25. The UE of claim 22 , wherein the processor and the memory are further configured to:

select the angular width of the selected beam to cover the one or more directional beams of the plurality of directional beams; and

indicate the angular width of the selected beam by at least one selected from a group of:

including a first parameter corresponding to the horizontal component of the selected beam and a second parameter corresponding to the vertical component of the selected beam in the transmitted report, and

indicating information about a number of directional beams included in the one or more directional beams.

26. The UE of claim 22 , wherein the processor and the memory are further configured to:

select a plurality of wide beams, including the selected beam, corresponding to a plurality of layers,

wherein the report further identifies the selected plurality of wide beams, including indicating a respective direction and a respective angular width of respective beams of the plurality of wide beams.

27. The UE of claim 22 , wherein the processor and the memory are further configured to:

receive, via the transceiver, a second reference signal on a downlink transmission configured according to the transmitted report; and

transmit, via the transceiver, a second report comprising at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI) based on a second set of one or more channel characteristics that are based on the second reference signal.

28. The UE of claim 22 , wherein the processor and the memory are further configured to:

receive, via the transceiver, a report configuration message comprising information indicating whether the transmitted report should include one or more of:

a wide beam corresponding to one or more directional beams; or

a narrow beam corresponding to a selected directional beam of the plurality of directional beams.

29. The UE of claim 22 , wherein the processor and the memory are further configured to:

determine, based on a moving status of the UE, whether the transmitted report should include one or more of:

a wide beam corresponding to one or more directional beams; or

a narrow beam corresponding to a selected directional beam of the plurality of directional beams.

30. The UE of claim 22 , wherein the report comprises an indication whether the selected beam is a wide beam corresponding to one or more directional beams, or a narrow beam corresponding to a selected directional beam of the plurality of directional beams.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (20)

Cited By (1)

US 12,738,988