IP Library › Granted Patent US 12684394

Granted Patent B2

US 12684394 · App. 18/448,119 · Granted Jul 14, 2026

CSI payload reduction for spatial and power domain adaptation

Inventors: Hung Dinh Ly (San Diego, CA); Changhwan Park (San Diego, CA); Ahmed Attia Abotabl (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W24/10 H04B7/0626 H04L5/0051

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Quick Facts

Patent No.: US 12684394
App. No.: 18/448,119
Granted: Jul 14, 2026
Kind: B2

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Abstract

A method for wireless communication at a user equipment (UE) and related apparatus are provided. In the method, the UE receives, from a network entity, a channel state information (CSI) report configuration including a set of sub-configurations. Each sub-configuration in the set of sub-configurations corresponds to a transmission setting associated with a channel state information reference signal (CSI-RS). The UE further determines one or more CSIs respectively corresponding to a subset of the set of sub-configurations, and transmits, based on the transmission setting corresponding to a first sub-configuration of the subset of sub-configurations, a reduced content of a CSI report or refrains from transmitting the CSI report. The CSI report is associated with a first CSI for the first sub-configuration.

Claims (75)

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

at least one memory; and

at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor is configured to:

receive, from a network entity, a channel state information (CSI) report configuration comprising a set of sub-configurations, wherein each sub-configuration in the set of sub-configurations corresponds to a transmission setting associated with a channel state information reference signal (CSI-RS);

determine one or more CSIs respectively corresponding to a subset of the set of sub-configurations; and

transmit, based on the transmission setting corresponding to a first sub-configuration of the subset of sub-configurations, and in response to a reduction condition being met, a reduced content of a CSI report or refrain from transmitting the CSI report, wherein the CSI report is associated with a first CSI for the first sub-configuration, wherein the reduced content of the CSI report includes a subset of CSI parameters of the CSI report, and wherein the subset of CSI parameters of the CSI report excludes a rank indicator (RI), wherein the reduction condition includes:

a first number of CSI-RS antenna ports being less than or equal to a second number of CSI-RS antenna ports associated with a second sub-configuration of the subset of sub-configurations, and

a first power offset between a physical downlink shared channel (PDSCH) and the CSI-RS associated with the first sub-configuration being smaller than or equal to a second power offset between the PDSCH and the CSI-RS associated with the second sub-configuration, wherein the second sub-configuration has a rank of one.

2 . The apparatus of claim 1 , further comprising a transceiver coupled to the at least one processor, wherein, to receive the CSI report configuration, the at least one processor is configured to receive the CSI report configuration via the transceiver, and wherein the transmission setting corresponding to the first sub-configuration includes one or more:

a number of CSI-RS antenna ports for the first sub-configuration, or

a power offset associated with the PDSCH for the first sub-configuration.

3 . The apparatus of claim 2 , wherein the at least one processor is further configured to:

determine, based on first configuration parameters and second configuration parameters in each sub-configuration of the subset of sub-configurations, the number of CSI-RS antenna ports for each sub-configuration of the subset of sub-configurations.

4 . The apparatus of claim 3 , wherein the transmission setting includes the number of CSI-RS antenna ports for the first sub-configuration, and wherein, to refrain from transmitting the CSI report, the at least one processor is configured to:

refrain from transmitting the CSI report in response to the first sub-configuration having the first number of CSI-RS antenna ports less than the second number of CSI-RS antenna ports of the second sub-configuration of the subset of sub-configuration.

5 . The apparatus of claim 3 , wherein the transmission setting includes the number of CSI-RS antenna ports for the first sub-configuration, and wherein, to transmit the reduced content of the CSI report, the at least one processor is configured to:

transmit the reduced content of the CSI report in response to the first sub-configuration having the first number of CSI-RS antenna ports less than the second number of CSI-RS antenna ports of the second sub-configuration of the subset of sub-configurations.

6 . The apparatus of claim 5 , wherein the subset of CSI parameters of the CSI report includes one or more parameters of part 1 CSI.

7 . The apparatus of claim 6 , wherein the one or more parameters of the part 1 CSI include one or more of: a channel rank indicator (CRI) or a channel quality indicator (CQI).

8 . The apparatus of claim 2 , wherein the power offset is between the PDSCH and the CSI-RS, or between the CSI-RS and a synchronization signal block (SSB).

9 . The apparatus of claim 8 , wherein the transmission setting includes the power offset, and wherein, to refrain from transmitting the CSI report, the at least one processor is configured to:

refrain from transmitting the CSI report in response to the first sub-configuration having the first power offset less than second power offset of the second sub-configuration of the subset of sub-configurations.

10 . The apparatus of claim 8 , wherein the transmission setting includes the power offset, and wherein, to transmit the reduced content of the CSI report, the at least one processor is configured to:

transmit the reduced content of the CSI report in response to the first sub-configuration having the first power offset less than the second power offset of the second sub-configuration of the subset of sub-configurations, and wherein the reduced content of the CSI report includes the subset of CSI parameters of the CSI report.

11 . The apparatus of claim 8 , wherein the transmission setting corresponding to the first sub-configuration includes the number of CSI-RS antenna ports and the power offset, and wherein to refrain from transmitting the CSI report, the at least one processor is configured to:

refrain from transmitting, in response to the reduction condition being met, the CSI report associated with the first CSI for the first sub-configuration.

12 . The apparatus of claim 11 , wherein the reduction condition includes:

the first number of CSI-RS antenna ports being equal to the second number of CSI-RS antenna ports associated with the second sub-configuration of the subset of sub-configurations, and

the first power offset between the PDSCH and the CSI-RS associated with the first sub-configuration being smaller than the second power offset between the PDSCH and the CSI-RS associated with the second sub-configuration.

13 . The apparatus of claim 11 , wherein the reduction condition includes:

the first number of CSI-RS antenna ports being less than the second number of CSI-RS antenna ports associated with the second sub-configuration of the subset of sub-configurations, and

the first power offset between the PDSCH and the CSI-RS associated with the first sub-configuration being equal to the second power offset between the PDSCH and the CSI-RS associated with the second sub-configuration.

14 . An apparatus of wireless communication at a network entity, comprising:

at least one memory; and

at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor is configured to:

transmit, to a user equipment (UE), a channel state information (CSI) report configuration comprising a set of sub-configurations, wherein each sub-configuration in the set of sub-configurations corresponds to a transmission setting associated with a channel state information reference signal (CSI-RS); and

receive, based on the transmission setting corresponding to a first sub-configuration of the set of sub-configurations, and in response to a reduction condition being met, the CSI report with a reduced content or refrain from receiving the CSI report, wherein the CSI report is associated with a first CSI for the first sub-configuration, wherein the reduced content of the CSI report includes a subset of CSI parameters of the CSI report, and wherein the subset of CSI parameters of the CSI report excludes a rank indicator (RI), wherein the reduction condition includes:

a first number of CSI-RS antenna ports being less than or equal to a second number of CSI-RS antenna ports associated with a second sub-configuration of the set of sub-configurations, and

15 . The apparatus of claim 14 , further comprising a transceiver coupled to the at least one processor, wherein, to transmit the CSI report configuration, the at least one processor is configured to transmit the CSI report configuration via the transceiver, and wherein the transmission setting corresponding to the first sub-configuration includes one or more:

a number of CSI-RS antenna ports for the first sub-configuration, or

a power offset associated with the PDSCH for the first sub-configuration.

16 . The apparatus of claim 15 , wherein the transmission setting includes the number of CSI-RS antenna ports for the first sub-configuration, and wherein, to refrain from receiving the CSI report, the at least one processor is configured to:

refrain from receiving the CSI report in response to the first sub-configuration having the first number of CSI-RS antenna ports less than the second number of CSI-RS antenna ports of the second sub-configuration of the set of sub-configurations.

17 . The apparatus of claim 15 , wherein the transmission setting includes the number of CSI-RS antenna ports for the first sub-configuration, and wherein, to receive the CSI report with the reduced content, the at least one processor is configured to:

receive the CSI report with the reduced content in response to the first sub-configuration having the first number of CSI-RS antenna ports less than the second number of CSI-RS antenna ports of the second sub-configuration of the set of sub-configurations.

18 . The apparatus of claim 17 , wherein the subset of CSI parameters of the CSI report includes one or more parameters of part 1 CSI.

19 . The apparatus of claim 18 , wherein the one or more parameters of the part 1 CSI include one or more of: a channel rank indicator (CRI) or a channel quality indicator (CQI).

20 . The apparatus of claim 15 , wherein the power offset is between the PDSCH and the CSI-RS, or between the CSI-RS and a synchronization signal block (SSB).

21 . The apparatus of claim 20 , wherein the transmission setting includes the power offset, and wherein, to refrain from receiving the CSI report, the at least one processor is configured to:

refrain from receiving the CSI report in response to the first sub-configuration having the first power offset less than the second power offset of the second sub-configuration of the set of sub-configurations.

22 . The apparatus of claim 20 , wherein the transmission setting includes the power offset, and wherein, to receive the CSI report with the reduced content, the at least one processor is configured to:

receive the CSI report with the reduced content in response to the first sub-configuration having the first power offset less than the second power offset of the second sub-configuration of the set of sub-configurations, and wherein the reduced content of the CSI report includes the subset of CSI parameters of the CSI report.

23 . The apparatus of claim 20 , wherein the transmission setting corresponding to the first sub-configuration includes the number of CSI-RS antenna ports and the power offset, and wherein, to refrain from receiving the CSI report, the at least one processor is configured to:

refrain from receiving the CSI report in response to the reduction condition being met.

24 . The apparatus of claim 23 , wherein the reduction condition includes:

the first number of CSI-RS antenna ports being equal to the second number of CSI-RS antenna ports associated with the second sub-configuration of the set of sub-configurations, and

25 . The apparatus of claim 23 , wherein the reduction condition includes:

the first number of CSI-RS antenna ports being less than the second number of CSI-RS antenna ports associated with the second sub-configuration of the set of sub-configurations, and

26 . A method of wireless communication in a user equipment (UE), comprising:

receiving, from a network entity, a channel state information (CSI) report configuration comprising a set of sub-configurations, wherein each sub-configuration in the set of sub-configurations corresponds to a transmission setting associated with a channel state information reference signal (CSI-RS);

determining one or more CSIs respectively corresponding to a subset of the set of sub-configurations; and

transmitting, based on the transmission setting corresponding to a first sub-configuration of the subset of sub-configurations, and in response to a reduction condition being met, a reduced content of a CSI report or refraining from transmitting the CSI report, wherein the CSI report is associated with a first CSI for the first sub-configuration, wherein the reduced content of the CSI report includes a subset of CSI parameters of the CSI report, and wherein the subset of CSI parameters of the CSI report excludes a rank indicator (RI), wherein the reduction condition includes:

a first number of CSI-RS antenna ports being less than or equal to a second number of CSI-RS antenna ports associated with a second sub-configuration of the subset of sub-configurations, and

27 . The method of claim 26 , wherein the transmission setting corresponding to the first sub-configuration includes one or more:

a number of CSI-RS antenna ports for the first sub-configuration, or

a power offset associated with the PDSCH for the first sub-configuration.

28 . A method of wireless communication at a network entity, comprising:

transmitting, to a user equipment (UE), a channel state information (CSI) report configuration comprising a set of sub-configurations, wherein each sub-configuration in the set of sub-configurations corresponds to a transmission setting associated with a channel state information reference signal (CSI-RS); and

receiving, based on the transmission setting corresponding to a first sub-configuration of the set of sub-configurations, and in response to a reduction condition being met, the CSI report with a reduced content or refraining from receiving the CSI report, wherein the CSI report is associated with a first CSI for the first sub-configuration, wherein the reduced content of the CSI report includes a subset of CSI parameters of the CSI report, and wherein the subset of CSI parameters of the CSI report excludes a rank indicator (RI), wherein the reduction condition includes:

a first number of CSI-RS antenna ports being less than or equal to a second number of CSI-RS antenna ports associated with a second sub-configuration of the set of sub-configurations, and