Beamforming in wireless communications
Aspects described herein relate to wireless communications. According to some aspects, a first base station may coordinate with a second base station to select beamforming codewords. The first base station may receive an index indicating beamforming codewords used by a second base station. The first base station may select a beamforming codeword for use in transmitting signals to a wireless device based on the beamforming codeword indicated by the second base station.
1. A method comprising:
receiving, by a first access point and from a second access point, an indication of a second beamforming codebook, associated with the second access point, comprising a plurality of beamforming matrixes;
receiving, by the first access point and from the second access point, at least one first frame indicating at least one index associated with a subset of beamforming matrixes of the plurality of beamforming matrixes; and
transmitting, by the first access point and to at least one device, at least one second frame using one or more first beamforming matrixes selected, by the first access point, based on the at least one index associated with the subset of beamforming matrixes of the plurality of beamforming matrixes.
2. The method of claim 1 , wherein the at least one index indicates at least one beamforming matrix of the second beamforming codebook.
3. The method of claim 1 , further comprising selecting the one or more first beamforming matrixes from a first beamforming codebook, associated with the first access point, comprising a second plurality of beamforming matrixes.
4. The method of claim 1 , wherein the selection of the one or more first beamforming matrixes is based on a determination that the one or more first beamforming matrixes reduces interference with the second access point.
5. The method of claim 1 , further comprising determining, based on information received from the at least one device, interference between the first access point and the second access point.
6. The method of claim 1 , wherein the first frame is a management frame or a control frame.
7. The method of claim 1 , wherein the second frame is a data frame.
8. The method of claim 1 , wherein the first access point and the second access point are members of a coordinated set.
9. A first access point comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the first access point to:
receive, from a second access point, an indication of a second beamforming codebook, associated with the second access point, comprising a plurality of beamforming matrixes;
receive, from the second access point, at least one first frame indicating at least one index associated with a subset of beamforming matrixes of the plurality of beamforming matrixes; and
transmit, to at least one device, at least one second frame using one or more first beamforming matrixes selected, by the first access point, based on the at least one index associated with the subset of beamforming matrixes of the plurality of beamforming matrixes.
10. The first access point of claim 9 , wherein the at least one index indicates at least one beamforming matrix of the second beamforming codebook.
11. The first access point of claim 9 , wherein the instructions, when executed by the one or more processors, cause the first access point to select the one or more first beamforming matrixes from a first beamforming codebook, associated with the first access point, comprising a second plurality of beamforming matrixes.
12. The first access point of claim 9 , wherein the selection of the one or more first beamforming matrixes is based on a determination that the one or more first beamforming matrixes reduces interference with the second access point.
13. The first access point of claim 9 , wherein the instructions, when executed by the one or more processors, cause the first access point to determine, based on information received from the at least one device, interference between the first access point and the second access point.
14. The first access point of claim 9 , wherein the first frame is a management frame or a control frame.
15. The first access point of claim 9 , wherein the second frame is a data frame.
16. The first access point of claim 9 , wherein the first access point and the second access point are members of a coordinated set.
17. A non-transitory computer readable medium comprising instructions that, when executed, configure a first access point to:
receive, from a second access point, an indication of a second beamforming codebook, associated with the second access point, comprising a plurality of beamforming matrixes;
receive, from the second access point, at least one first frame indicating at least one index associated with a subset of beamforming matrixes of the plurality of beamforming matrixes; and
transmit, to at least one device, at least one second frame using one or more first beamforming matrixes selected, by the first access point, based on the at least one index associated with the subset of beamforming matrixes of the plurality of beamforming matrixes.
18. The non-transitory computer readable medium of claim 17 , wherein the at least one index indicates at least one beamforming matrix of the second beamforming codebook.
19. The non-transitory computer readable medium of claim 17 , wherein the instructions, when executed, configure the first access point to select the one or more first beamforming matrixes from a first beamforming codebook, associated with the first access point, comprising a second plurality of beamforming matrixes.
20. The non-transitory computer readable medium of claim 17 , wherein the selection of the one or more first beamforming matrixes is based on a determination that the one or more first beamforming matrixes reduces interference with the second access point.
21. The non-transitory computer readable medium of claim 17 , wherein the instructions, when executed, configure the first access point to determine, based on information received from the at least one device, interference between the first access point and the second access point.
22. The non-transitory computer readable medium of claim 17 , wherein the first frame is a management frame or a control frame.
23. The non-transitory computer readable medium of claim 17 , wherein the second frame is a data frame.
24. The non-transitory computer readable medium of claim 17 , wherein the first access point and the second access point are members of a coordinated set.
25. A system comprising:
a first access point; and
a second access point,
wherein the first access point is configured to:
transmit, to at least one device, at least one second frame using one or more first beamforming matrixes selected, by the first access point, based on at least one index associated with a subset of beamforming matrixes of a plurality of beamforming matrixes; and
wherein the second access point is configured to:
transmit, to the first access point, at least one first frame indicating the at least one index associated with the subset of beamforming matrixes of the plurality of beamforming matrixes.
26. The system of claim 25 , wherein the second access point is configured to:
transmit, to the first access point, an indication of a second beamforming codebook, associated with the second access point comprising the plurality of beamforming matrixes.
27. The system of claim 26 , wherein the at least one index indicates at least one beamforming matrix of the second beamforming codebook.
28. The system of claim 25 , wherein the first access point is configured to select the one or more first beamforming matrixes from a first beamforming codebook, associated with the first access point, comprising a second plurality of beamforming matrixes.
29. The system of claim 25 , wherein the selection of the one or more first beamforming matrixes is based on a determination that the one or more first beamforming matrixes reduces interference with the second access point.
30. The system of claim 25 , wherein the first access point is configured to determine, based on information received from the at least one device, interference between the first access point and the second access point.
31. The system of claim 25 , wherein the first frame is a management frame or a control frame.
32. The system of claim 25 , wherein the second frame is a data frame.
33. The system of claim 25 , wherein the first access point and the second access point are members of a coordinated set.