US 11,705,945 B2 · Codebook subset restriction for enhanced type II channel state information reporting

Abstract

A base station may transmit to a device an indication of codebook subset restriction (CBSR), which includes at least a restriction on a frequency basis. The device may receive the indication of CBSR, and may transmit to the base station channel state information (CSI) according to the received indication of CBSR. The indication of CBSR may also include a restriction on a spatial basis and restrict the device from reporting the CSI based on a subset of the frequency basis in addition to the spatial basis per configuration of the base station. The indication of CBSR may include a separately configured maximum allowed amplitude of a weighting coefficient for the spatial basis and the frequency basis, where the weighting coefficient is associated with a column vector of a precoding matrix used by the base station and the device. The number of frequency bases and the frequency compression units may be determined based on a number of different criteria, for example the number of antennas, the number of subbands, etc.

Claims20

Dependent claims

An apparatus comprising:

a processor configured to:
receive, from a base station, an indication of codebook subset restriction (CBSR) intended for a device, wherein the indication includes at least a restriction on a frequency basis and a spatial basis, wherein the restriction is an amplitude restriction based on a product of corresponding spatial basis and frequency basis values for a beam group;
and
cause the device to transmit, to the base station, a channel state information (CSI) according to the indication of CBSR.

1 more element

A device comprising:

radio circuitry configured to enable wireless communications of the device;
and
a processor communicatively coupled to the radio circuitry and configured to interoperate with the radio circuitry to:
receive, from a base station, an indication of codebook subset restriction (CBSR), wherein the indication includes at least a restriction on a frequency basis and a spatial basis, wherein the restriction is an amplitude restriction based on a product of corresponding spatial basis and frequency basis values for a beam group;
and
transmit, to the base station, a channel state information (CSI) according to the indication of CBSR.

3 more elements

A non-transitory memory element storing instructions executable by a processor to cause a device to:

receive, from a base station, an indication of codebook subset restriction (CBSR), wherein the indication includes at least a restriction on a frequency basis and a spatial basis, wherein the restriction is an amplitude restriction based on a product of corresponding spatial basis and frequency basis values for a beam group;
and
transmit, to the base station, a channel state information (CSI) according to the indication of CBSR.

Dependencies are inferred from the claim text.

Facts

Application

17/965,147Filed 13 Oct 2022 · continuation

Priority

CN 201910018336.39 Jan 2019

Published

US 2023/0042158 A19 Feb 2023

Granted

18 Jul 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04B 7/0481
Special codebook structures directed to feedback optimisation: using subset selection of codebooks
H04B 7/0456
MIMO systems: selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
H04B 7/046
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: taking physical layer constraints into account
H04B 7/0626
Feedback content: channel coefficients, e.g. channel state information [CSI]

Family

Application16/735,750Parent of this continuation · filed 7 Jan 2020

Application17/224,915Parent of this continuation · filed 7 Apr 2021

US 10,979,109 B2Parent of this continuation · filed 13 Apr 2021

US 2023/0042158 A1Pre-grant publication · published 9 Feb 2023

US 11,489,567 B2Parent of this continuation

US 2020/0220591 A1Published application

US 2021/0226678 A1Published application

US 11,705,945 B2This patent

From the US filing history. Foreign family members aren’t listed.

Codebook subset restriction for enhanced type II channel state information reporting

Life of this patent

Codebook subset restriction for enhanced type II channel state information reporting

Life of this patent

Abstract

Claims20