Beam selection using oversampled beamforming codebooks and channel estimates
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may receive, from a second network node, codebook information that indicates a plurality of beams associated with an oversampled transmitter network node beamforming codebook. The first network node may transmit a beam selection report that indicates at least one suggested transmission beam associated with the oversampled transmitter network node beamforming codebook, wherein the beam selection report is based at least in part on a channel estimate that is obtained without obtaining beam measurements associated with beams that are associated with the oversampled transmitter network node beamforming codebook. Numerous other aspects are described.
1 . A first network node for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive, from a second network node, information that indicates a plurality of beams associated with a transmitter network node beamforming codebook; and
transmit a beam selection report that indicates at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook, wherein the at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook is based at least in part on a predictive operation that utilizes measurements of another plurality of beams received from the second network node.
2 . The first network node of claim 1 , wherein the one or more processors are further configured to obtain a channel estimate from the measurements, based at least in part on a sparse recovery operation.
3 . The first network node of claim 2 , wherein the sparse recovery operation is based at least in part on an orthogonal matching pursuit (OMP) procedure.
4 . The first network node of claim 2 , wherein the one or more processors are further configured to:
receive, using at least one reception beam, a plurality of signals associated with a plurality of transmission beams; and
obtain a plurality of beam measurements associated with the plurality of transmission beams based at least in part on the at least one reception beam.
5 . The first network node of claim 4 , wherein the one or more processors are further configured to:
determine the channel estimate based at least in part on using the measurements as inputs to the sparse recovery operation; and
determine the at least one reception beam based at least in part on the channel estimate.
6 . The first network node of claim 5 , wherein the measurements are associated with at least one beam pair, of a set of beam pairs, corresponding to a subset of reference signal received power (RSRP) measurements having largest RSRP values of a set of RSRP values associated with a plurality of beam pairs, wherein each beam pair of the plurality of beam pairs comprises a transmission beam of the plurality of transmission beams and a reception beam of the at least one reception beam.
7 . The first network node of claim 1 , further comprising a transceiver, wherein the one or more processors are further configured to communicate, by the transceiver, with the second network node using at least one reception beam, wherein the at least one reception beam comprises a reception beam associated with an oversampled receiver network node beamforming codebook.
8 . The first network node of claim 1 , wherein a channel estimate is obtained from the measurements, and wherein the at least one suggested transmission beam is based at least in part on the channel estimate.
9 . The first network node of claim 8 , wherein the at least one suggested transmission beam is based at least in part on a mapping between the channel estimate and the transmitter network node beamforming codebook, and wherein the mapping is based at least in part on a trained neural network.
10 . The first network node of claim 1 , wherein a channel estimate is obtained from the measurements, and wherein the at least one suggested transmission beam is based at least in part on performing a grid search operation associated with the transmitter network node beamforming codebook and based at least in part on the channel estimate.
11 . The first network node of claim 1 , wherein the one or more processors are further configured to receive a beam suggestion response indication that indicates whether the second network node will use the at least one suggested transmission beam.
12 . The first network node of claim 11 , wherein the one or more processors are further configured to determine to use at least one reception beam based at least in part on the beam suggestion response indication.
13 . The first network node of claim 1 , wherein the measurements are obtained using codebook beams that are associated with an algorithmic procedure.
14 . The first network node of claim 1 , wherein the one or more processors are further configured to:
perform a mapping, using a neural network, to one or more indices of one or more beams in the transmitter network node beamforming codebook.
15 . The first network node of claim 1 , wherein the at least one suggested transmission beam is based at least in part on a mapping between the measurements and the transmitter network node beamforming codebook.
16 . A first network node for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to:
transmit, to a second network node, information that indicates a plurality of beams associated with a transmitter network node beamforming codebook; and
receive a beam selection report that indicates at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook, wherein the at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook is based at least in part on a predictive operation that that utilizes measurements of another plurality of beams transmitted by the first network node.
17 . The first network node of claim 16 , wherein the at least one suggested transmission beam is based at least in part on a channel estimate, wherein the channel estimate is based at least in part on a sparse recovery operation.
18 . The first network node of claim 17 , wherein the sparse recovery operation is based at least in part on an orthogonal matching pursuit (OMP) procedure.
19 . The first network node of claim 17 , wherein the sparse recovery operation is not based on beam measurements associated with beams that are associated with the transmitter network node beamforming codebook.
20 . The first network node of claim 17 , wherein the at least one suggested transmission beam is based at least in part on a mapping between the channel estimate and the transmitter network node beamforming codebook, and wherein the mapping is based at least in part on a trained neural network.
21 . The first network node of claim 17 , wherein the at least one suggested transmission beam is based at least in part on a grid search operation associated with the transmitter network node beamforming codebook and based at least in part on the channel estimate.
22 . The first network node of claim 16 , further comprising a transceiver, wherein the one or more processors are further configured to transmit, by the transceiver, a beam suggestion response indication that indicates whether the first network node will use the at least one suggested transmission beam.
23 . A method of wireless communication performed by a first network node, comprising:
receiving, from a second network node, information that indicates a plurality of beams associated with a transmitter network node beamforming codebook; and
transmitting a beam selection report that indicates at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook, wherein the at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook is based at least in part on a predictive operation that utilizes measurements of another plurality of beams received from the second network node.
24 . The method of claim 23 , further comprising obtaining a channel estimate from the measurements, based at least in part on a sparse recovery operation.
25 . The method of claim 24 , further comprising:
receiving, using at least one reception beam, a plurality of signals associated with a plurality of transmission beams; and
obtaining a plurality of beam measurements associated with the plurality of transmission beams based at least in part on the at least one reception beam.
26 . The method of claim 25 , further comprising:
determining the channel estimate based at least in part on using the measurements as inputs to the sparse recovery operation; and
determining the at least one reception beam based at least in part on the channel estimate.
27 . The method of claim 25 , further comprising:
communicating with the second network node using the at least one reception beam, wherein the at least one reception beam comprises a reception beam associated with an oversampled receiver network node beamforming codebook.
28 . The method of claim 23 , wherein a channel estimate is obtained from the measurements, and wherein the at least one suggested transmission beam is based at least in part on a mapping between the channel estimate and the transmitter network node beamforming codebook, and wherein the mapping is based at least in part on a trained neural network.
29 . The method of claim 23 , wherein a channel estimate is obtained from the measurements, and wherein the at least one suggested transmission beam is based at least in part on performing a grid search operation associated with the transmitter network node beamforming codebook and based at least in part on the channel estimate.
30 . A method of wireless communication performed by a first network node, comprising:
transmitting, to a second network node, information that indicates a plurality of beams associated with a transmitter network node beamforming codebook; and
receiving a beam selection report that indicates at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook, wherein the at least one suggested transmission beam from the plurality of beams associated with the transmitter network node beamforming codebook is based at least in part on a predictive operation that utilizes measurements of another plurality of beams transmitted by the first network node.