US 12,237,900 B2
Independent sub-band size for precoding matrix indicator and channel quality indicator
Niklas Wernersson, Kungsängen (SE); Sebastian Faxér, Stockholm (SE); and Maksym Girnyk, Solna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Apr. 12, 2024, as Appl. No. 18/633,573.
Application 18/633,573 is a continuation of application No. 18/174,712, filed on Feb. 27, 2023, granted, now 12,034,508.
Application 18/174,712 is a continuation of application No. 17/551,800, filed on Dec. 15, 2021, granted, now 11,595,098.
Application 17/551,800 is a continuation of application No. 16/981,507, granted, now 11,206,070, previously published as PCT/SE2019/051067, filed on Oct. 28, 2019.
Claims priority of provisional application 62/755,127, filed on Nov. 2, 2018.
Prior Publication US 2024/0267103 A1, Aug. 8, 2024
Int. Cl. H04B 7/06 (2006.01)
CPC H04B 7/0632 (2013.01) [H04B 7/0634 (2013.01); H04B 7/0639 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A host computer configured to operate in a communication system to provide an over-the-top, OTT, service, the host comprising:
processing circuitry configured to provide user data; and
a network interface configured to initiate transmission of the user data to a network node in a cellular network for transmission to a user equipment, UE,
the network node having a communication interface and processing circuitry configured to perform a method for receiving channel state information, CSI, feedback using a multi-beam precoder codebook, the method comprising:
receiving the CSI feedback from the UE according to a sub-band channel quality indicator, CQI, granularity and a sub-band precoding matrix indicator, PMI, granularity, wherein the sub-band PMI granularity corresponds to a first sub-band size and the sub-band CQI granularity corresponds to a second sub-band size, wherein the first sub-band size is smaller than the second sub-band size, wherein the CSI feedback indicates a linear combination of precoder vectors for each of a plurality of frequency sub-bands having the first sub-band size, wherein the coefficients for the precoder vectors in the linear combinations of precoder vectors are parameterized in the frequency-domain as a linear combination of a set of basis vectors and a set of coefficients for the basis vectors in the linear combination of the set of basis vectors.