Systems and methods for channel state information report

Patent metadata

Field	Value
Publication number	US-12395220-B2
Application number	US-202318529249-A
Country	US
Kind code	B2
Filing date	Dec 5, 2023
Priority date	Jan 20, 2023
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

The present arrangement relate to systems, methods, and non-transitory computer-readable media for reporting a Channel State Information (CSI) report, the CSI report including a CSI part 1 and a CSI part 2 ; and communicating, by a wireless communication device with a network, based on the CSI report.

First claim

The invention claimed is:

1. A wireless communication method, comprising:
receiving, by a wireless communication device from a network, a plurality of reference signals and a configuration parameter;
determining a Channel State Information (CSI) report based on the plurality of reference signals and the configuration parameter, wherein the CSI report comprises CSI part 1 and CSI part 2 , wherein the CSI report comprises a plurality of Channel Quality Indicator (CQI) sets, and each of the plurality of CQI sets comprises a wideband CQI and at least one subband differential CQI associated with the wideband CQI, wherein a CQI mapping order in the CSI report comprises:
for mapping to the CSI part 1 : the wideband CQI for a first CQI set of the plurality of CQI sets, the at least one subband differential CQI for the first CQI set, in that order; and
for mapping to the CSI part 2 : the wideband CQI for a second CQI set of the plurality of CQI sets, the at least one subband differential CQI for the second CQI set, in that order; and

reporting, by the wireless communication device to the network, the CSI report.

2. The method of claim 1 , further comprising:
sending, by the wireless communication device to the network, a User Equipment (UE) capability report indicating that the wireless communication device supports a number of Channel Quality Indicator (CQI) reports, wherein the number is a positive integer.

3. The method of claim 2 , wherein:
when a maximum allowed rank is 1, a total number of a non-zero coefficients is a value; and
when the maximum allowed rank is a number other than 1, the total number of the non-zero coefficients is two times the value.

4. The method of claim 2 , wherein:
when a maximum allowed rank is 1, a total number of a non-zero coefficients is a value; and
when the maximum allowed rank is a number other than 1, the total number of the non-zero coefficients is two times the value, wherein the value is determined based on a number of Doppler domain basis.

5. The method of claim 1 , wherein the CSI report comprises, for the CSI part 1 , an indicator for a total number of non-zero coefficients summed across a plurality of layers and across a plurality of numbers of Doppler domain basis, the non-zero coefficients are associated with at least one Precoding Matrix Indicator (PMI).

6. The method of claim 1 , wherein at least one of:
the configuration parameter is configured for enabling two or more Channel Quality Indicators (CQIs) in the CSI report; or
the reference signals are aperiodic or semi-persistent.

7. The method of claim 1 , wherein:
the CSI report comprises a Strongest Coefficient Indicator (SCI) across a plurality of Spatial domain basis, Frequency domain basis, and Doppler domain basis, the SCI is associated with at least one Precoding Matrix Indicator (PMI);
a location of the SCI is mapped to group 0 of the CSI part 2 ; and
a bitwidth of the SCI comprises:
for rank 1 , the bitwidth is determined based on a total number of non-zero coefficients summed across a plurality of layers and across a plurality of numbers of Doppler domain basis, and for ranks 2 , 3 , and 4 , the bitwidth is determined based on a value.

8. The method of claim 1 , wherein a value is determined according to a number of a Spatial domain basis.

9. The method of claim 1 , wherein the CSI report comprises highest priority bits of locations of coefficients determined based on a priority function are mapped to a group of the CSI part 2 in decreasing order, the locations of the coefficients are associated with at least one Precoding Matrix Indicator (PMI).

10. The method of claim 9 , wherein:
the highest priority bits are determined based on a number of Doppler domain basis;
the highest priority bits determined based on the priority function are mapped to group 1 of CSI part 2 in the decreasing order; and
the CSI report comprises lowest priority bits determined based on the priority function are mapped to group 2 of the CSI part 2 in decreasing order.

11. The method of claim 9 , wherein the priority function is determined according to indices of Doppler Domain (DD)-basis, Frequency Domain (FD)-basis and Spatial Domain (SB)-basis, and layer index.

12. A wireless communication method, comprising:
transmitting, by a network to a wireless communication device, a plurality of reference signals and a configuration parameter; and
receiving, by the network from the wireless communication device, a Channel State Information (CSI), the CSI report comprising CSI part 1 and CSI part 2 , wherein the CSI report comprises a plurality of Channel Quality Indicator (CQI) sets, and each of the plurality of CQI sets comprises a wideband CQI and at least one subband differential CQI associated with the wideband CQI, wherein a CQI mapping order in the CSI report comprises:
for mapping to the CSI part 1 : the wideband CQI for a first CQI set of the plurality of CQI sets, the at least one subband differential CQI for the first CQI set, in that order; and
for mapping to the CSI part 2 : the wideband COI for a second CQI set of the plurality of CQI sets, the at least one subband differential CQI for the second CQI set, in that order.

13. A network node, comprising:
at least one processor configured to:
transmit, via a transceiver to a wireless communication device, a plurality of reference signals and a configuration parameter; and
receive, via the transceiver from the wireless communication device, a Channel State Information (CSI), the CSI report comprising CSI part 1 and CSI part 2 , wherein the CSI report comprises a plurality of Channel Quality Indicator (CQI) sets, and each of the plurality of CQI sets comprises a wideband CQI and at least one subband differential CQI associated with the wideband CQI, wherein a CQI mapping order in the CSI report comprises:
for mapping to the CSI part 1 : the wideband CQI for a first CQI set of the plurality of CQI sets, the at least one subband differential CQI for the first CQI set, in that order; and

for mapping to the CSI part 2 : the wideband CQI for a second CQI set of the plurality of CQI sets, the at least one subband differential CQI for the second CQI set, in that order.

14. A wireless communication device, comprising:
at least one processor configured to:
receive, via a transceiver from a network, a plurality of reference signals and a configuration parameter;
determine a Channel State Information (CSI) report based on the plurality of reference signals and the configuration parameter, wherein the CSI report comprises CSI part 1 and CSI part 2 , wherein the CSI report comprises a plurality of Channel Quality Indicator (CQI) sets, and each of the plurality of CQI sets comprises a wideband CQI and at least one subband differential CQI associated with the wideband CQI, wherein a CQI mapping order in the CSI report comprises:
for mapping to the CSI part 1 : the wideband CQI for a first CQI set of the plurality of CQI sets, the at least one subband differential CQI for the first CQI set, in that order; and

for mapping to the CSI part 2 : the wideband CQI for a second CQI set of the plurality of CQI sets, the at least one subband differential CQI for the second CQI set, in that order; and
report, via the transceiver to the network, the CSI report.

15. The wireless communication device of claim 14 , wherein the CSI report comprises a plurality of Channel Quality Indicator (CQI) sets, and at least one of the plurality of CQI sets comprises a wideband CQI and at least one subband differential CQI associated with the wideban

Assignees

• Zte Corp

Inventors

• Zou Minqiang
• Zhang Shujuan
• Gao Bo
• Yan Wenjun
• Lu Zhaohua

Classifications

• H04B7/0632 Primary

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title

• H04B7/0456

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04L1/0026

  Transmission of channel quality indication · CPC title

• H04B7/0639

  Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection · CPC title

• H04B7/063

  Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection · CPC title