Granted Patent B2

US 12,237,900 · App. 18/633,573 · Granted Feb 25, 2025

Inventors: Niklas Wernersson (Kungsängen, SE); Sebastian Faxér (Stockholm, SE); Maksym Girnyk (Solna, SE)

Assignee: Telefonaktiebolaget LM Ericsson (publ)

H04B7/0632H04B7/0634H04B7/0639

Abstract

Claims (41)

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.

2. The host computer of claim 1 , the method further comprising:

determining the sub-band CQI granularity;

determining the sub-band PMI granularity; and

configuring the wireless device with the sub-band CQI granularity and the sub-band PMI granularity.

3. The host computer of claim 1 , wherein the precoder vectors are discrete Fourier transform, DFT, precoder vectors, wherein the CSI feedback is received using a new radio, NR, Type II multi-beam precoder codebook, and wherein the CSI feedback is of new radio, NR, enhanced Type II.

4. A method implemented in a communication system including a host computer, one or more base stations and a user equipment, UE, comprising:

at the host computer, providing user data; and

at the host computer, initiating a transmission carrying the user data to the UE via a cellular network comprising the one or more base stations wherein at least one of the one or more base stations is configured to:

receive, channel state information, 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, and wherein the CSI feedback is received using a multi-beam precoder codebook.

5. The method of claim 4 , the at least one of the one or more base stations further configured to:

determine the sub-band CQI granularity;

determine the sub-band PMI granularity; and

configure the UE with the sub-band CQI granularity and the sub-band PMI granularity.

6. The method of claim 4 , wherein the precoder vectors are discrete Fourier transform, DFT, precoder vectors, wherein the CSI feedback is received using a new radio, NR, Type II multi-beam precoder codebook, and wherein the CSI feedback is of new radio, NR, enhanced Type II.

7. A communication system including a host computer comprising:

processing circuitry configured to provide user data; and

a communication interface configured to initiate transmission of the user data to

a communication network for transmission to a user equipment, UE, wherein the communication network comprises at least one base station having a radio interface and base station processing circuitry, the base station processing circuitry configured to:

receive, channel state information, CSI, feedback from a wireless device 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, and wherein the CSI feedback is received using a multi-beam precoder codebook.

8. The system of claim 7 , the at least one base station further configured to:

determine the sub-band CQI granularity;

determine the sub-band PMI granularity; and

configure the UE with the sub-band CQI granularity and the sub-band PMI granularity.

9. The system of claim 7 , wherein the precoder vectors are discrete Fourier transform, DFT, precoder vectors, wherein the CSI feedback is received using a new radio, NR, Type II multi-beam precoder codebook, and wherein the CSI feedback is of new radio, NR, enhanced Type II.

10. A host computer comprising:

processing circuitry configured to provide user data; and

a communication interface configured to forward user data to a cellular network for transmission to a user equipment, UE,

the UE configured to transmit channel state information, CSI, feedback using a multi-beam precoder codebook, and the UE comprising a radio interface, memory operable to store instructions and processing circuitry operable to execute the instructions, whereby the UE is operable to:

receive a configuration for a sub-band channel quality indicator, CQI, granularity and a sub-band precoding matrix indicator, PMI, granularity for the UE, 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; and

transmit the CSI feedback to a base station, wherein the CSI feedback is in accordance with the sub-band CQI granularity and the sub-band PMI granularity, 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.

11. The host computer of claim 10 , wherein the precoder vectors are discrete Fourier transform, DFT, precoder vectors.

12. The host computer of claim 10 , wherein the CSI feedback is transmitted using a new radio, NR, Type II multi-beam precoder codebook.

13. The host computer of claim 10 , wherein the CSI feedback is of new radio, NR, enhanced Type II.

14. The host computer of claim 10 , wherein the second sub-band size is an integer multiple of the first sub-band size.

15. The host computer of claim 10 , wherein the sub-band CQI granularity configuration is obtained from a subbandSize radio resource control parameter in a CSI-ReportConfig.

16. The host computer of claim 10 , wherein the sub-band PMI granularity is obtained from a CSI-ReportConfig using a subbandPMI-Size parameter.

Assignments (1)

Continuity (5)

References Cited (13)