Beam information exchange between base stations
First Claim
Patent Images
1. A method for use in a first base station employing a first beamforming codebook, the method comprising:
- receiving, by the first base station and from a second base station, an indication of a second beamforming codebook comprising a plurality of beamforming codewords associated with the second base station;
receiving, by the first base station and from the second base station, at least one message indicating a subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station; and
transmitting, by the first base station and to at least one wireless device, at least one signal employing one or more first beamforming codewords selected, by the first base station, from the first beamforming codebook based, at least in part, on the indicated subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station.
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Abstract
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.
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Citations
27 Claims
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1. A method for use in a first base station employing a first beamforming codebook, the method comprising:
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receiving, by the first base station and from a second base station, an indication of a second beamforming codebook comprising a plurality of beamforming codewords associated with the second base station; receiving, by the first base station and from the second base station, at least one message indicating a subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station; and transmitting, by the first base station and to at least one wireless device, at least one signal employing one or more first beamforming codewords selected, by the first base station, from the first beamforming codebook based, at least in part, on the indicated subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
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10. A first base station comprising:
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one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the first base station to; receive, from a second base station, an indication of a second beamforming codebook comprising a plurality of beamforming codewords associated with the second base station; receive, from the second base station, at least one message indicating a subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station; and transmit, to at least one wireless device, at least one signal employing one or more first beamforming codewords selected, by the first base station, from a first beamforming codebook based, at least in part, on the indicated subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station. - View Dependent Claims (11, 13, 14, 15, 16, 17, 18)
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19. A system comprising:
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a first base station; and one or more wireless devices, wherein the first base station is configured to; receive, from a second base station, an indication of a second beamforming codebook comprising a plurality of beamforming codewords associated with the second base station; receive, from the second base station, at least one message indicating a subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station; and transmit, to one or more wireless devices, at least one signal employing one or more first beamforming codewords selected, by the first base station, from a first beamforming codebook based, at least in part, on the indicated subset of beamforming codewords of the plurality of beamforming codewords associated with the second base station; and wherein the one or more wireless devices are configured to receive the at least one signal transmitted employing the one or more first beamforming codewords. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification