Channel state information measurement and reporting with network adaptation

1 . A method for a user equipment (UE) to report channel state information (CSI), the method comprising:

receiving:

first information related to reception of one or more non-zero power CSI reference signals (NZP CSI-RSs) on a cell,

second information related to determining a CSI report, wherein the second information includes:

a set of parameters that commonly apply to a first number of CSI sub-reports, and

a first number of sets of parameters to apply to the first number of CSI sub-reports, respectively, wherein the first number of sets of parameters are related to adaptations of the NZP CSI-RSs in one or more of power or spatial domains,

third information related to indicating a second number of CSI sub-reports from the first number of CSI sub-reports,

fourth information related to an uplink (UL) channel for transmitting the CSI report, and

the one or more NZP CSI-RSs based on the first information;

determining:

the second number of CSI sub-reports based on the second information, the third information, and the reception of the one or more NZP CSI-RSs, and

a third number of CSI sub-reports from the second number of CSI sub-reports based on the fourth information; and

transmitting the UL channel with the CSI report including the third number of CSI sub-reports.

2 . The method of claim 1 , wherein:

the first number of sets of parameters provide information related to a CSI codebook for the first number of CSI sub-reports, respectively,

a first set of parameters from the first number of sets of parameters indicates a single-panel CSI codebook type, and

a second set of parameters from the first number of sets of parameters indicates a multi-panel CSI codebook type.

3 . The method of claim 1 , wherein the first number of sets of parameters provide, for the first number of CSI sub-reports, respectively, an offset value to power offset values of physical downlink shared channel (PDSCH) resource element (RE) to NZP CSI-RS RE of the one or more NZP CSI-RSs.

4 . The method of claim 1 , wherein:

the first number of sets of parameters provide information related to a CSI codebook for the first number of CSI sub-reports, respectively, and

the information related to CSI codebook includes at least one of:

a number of antenna ports in a horizontal dimension,

a number of antenna ports in a vertical dimension,

a number of antenna panels,

a codebook subset restriction, and

a rank indication restriction.

5 . The method of claim 1 , wherein:

the set of parameters that commonly apply to the first number of CSI sub-reports, provided by the second information, indicates semi-persistent CSI reporting on a physical uplink control channel (PUCCH);

the third information provides indexes for the second number of CSI sub-reports from the first number of CSI sub-reports; and

the third information is provided by a medium access control (MAC) control element (MAC CE) in a physical downlink shared channel (PDSCH) reception.

6 . The method of claim 1 , wherein:

the set of parameters that commonly apply to the first number of CSI sub-reports, provided by the second information, indicates aperiodic CSI reporting or semi-persistent CSI reporting on a physical uplink shared channel (PUSCH);

the third information is provided by:

a radio resource control (RRC) message in a physical downlink shared channel (PDSCH) reception providing one or more candidate sets of indexes for the second number of CSI sub-reports, and

a downlink control information (DCI) format in a physical downlink control channel (PDCCH) reception, according to a UE-specific search space, indicating an index from the one or more candidate sets of indexes provided by RRC message in a PDSCH reception.

7 . The method of claim 1 , wherein:

the fourth information provides a maximum code rate for the UL channel, and

determining the third number of CSI sub-reports further comprises:

determining, when UL control information (UCI) exceeds the maximum code rate, the third number of CSI sub-reports from the second number of CSI sub-reports by dropping a CSI sub-report in a descending order of a sub-report index from the second number of CSI sub-reports until the maximum code rate is met, and

determining, when the UCI does not exceed the maximum code rate, the third number of CSI sub-reports from the second number of CSI sub-reports as equal to the second number of CSI sub-reports.

8 . A user equipment (UE), comprising:

a transceiver configured to receive:

first information related to reception of one or more non-zero power channel state information reference signals (NZP CSI-RSs) on a cell,

second information related to determining a channel state information (CSI) report, wherein the second information includes:

a set of parameters that commonly apply to a first number of CSI sub-reports, and

a first number of sets of parameters to apply to the first number of CSI sub-reports, respectively, wherein the first number of sets of parameters are related to adaptations of the NZP CSI-RSs in one or more of power or spatial domains,

third information related to indicating a second number of CSI sub-reports from the first number of CSI sub-reports,

fourth information related to an uplink (UL) channel for transmitting the CSI report, and

the one or more NZP CSI-RSs based on the first information; and

a processor operably coupled to the transceiver, the processor configured to determine:

the second number of CSI sub-reports based on the second information, the third information, and the reception of the one or more NZP CSI-RSs, and

a third number of CSI sub-reports from the second number of CSI sub-reports based on the fourth information,

wherein the transceiver is further configured to transmit the UL channel with the CSI report including the third number of CSI sub-reports.

9 . The UE of claim 8 , wherein:

the first number of sets of parameters provide information related to a CSI codebook for the first number of CSI sub-reports, respectively,

a first set of parameters from the first number of sets of parameters indicates a single-panel CSI codebook type, and

a second set of parameters from the first number of sets of parameters indicates a multi-panel CSI codebook type.

10 . The UE of claim 8 , wherein the first number of sets of parameters provide, for the first number of CSI sub-reports, respectively, an offset value to power offset values of physical downlink shared channel (PDSCH) resource element (RE) to NZP CSI-RS RE of the one or more NZP CSI-RSs.

11 . The UE of claim 8 , wherein:

the first number of sets of parameters provide information related to a CSI codebook for the first number of CSI sub-reports, respectively, and

the information related to CSI codebook includes at least one of:

a number of antenna ports in a horizontal dimension,

a number of antenna ports in a vertical dimension,

a number of antenna panels,

a codebook subset restriction, and

a rank indication restriction.

12 . The UE of claim 8 , wherein:

the set of parameters that commonly apply to the first number of CSI sub-reports, provided by the second information, indicates semi-persistent CSI reporting on a physical uplink control channel (PUCCH);

the third information provides indexes for the second number of CSI sub-reports from the first number of CSI sub-reports; and

the third information is provided by a medium access control (MAC) control element (MAC CE) in a physical downlink shared channel (PDSCH) reception.

13 . The UE of claim 8 , wherein:

the set of parameters that commonly apply to the first number of CSI sub-reports, provided by the second information, indicates aperiodic CSI reporting or semi-persistent CSI reporting on a physical uplink shared channel (PUSCH);

the third information is provided by:

a radio resource control (RRC) message in a physical downlink shared channel (PDSCH) reception providing one or more candidate sets of indexes for the second number of CSI sub-reports, and

a downlink control information (DCI) format in a physical downlink control channel (PDCCH) reception, according to a UE-specific search space, indicating an index from the one or more candidate sets of indexes provided by RRC message in a PDSCH reception.

14 . The UE of claim 8 , wherein:

the fourth information provides a maximum code rate for the UL channel,

the processor is further configured to:

determine, when UL control information (UCI) exceeds the maximum code rate, the third number of CSI sub-reports from the second number of CSI sub-reports by dropping a CSI sub-report in a descending order of a sub-report index from the second number of CSI sub-reports until the maximum code rate is met, and

determine, when the UCI does not exceed the maximum code rate, the third number of CSI sub-reports from the second number of CSI sub-reports as equal to the second number of CSI sub-reports.

15 . A base station (BS), comprising:

a processor; and

a transceiver operably coupled to the processor, the transceiver configured to:

transmit:

first information related to transmission of one or more non-zero power channel state information reference signals (NZP CSI-RSs) on a cell,

second information related to determining a channel state information (CSI) report, wherein the second information includes:

a set of parameters that commonly apply to a first number of CSI sub-reports, and

a first number of sets of parameters to apply to the first number of CSI sub-reports, respectively, wherein the first number of sets of parameters are related to adaptations of the NZP CSI-RSs in one or more of power or spatial domains,

third information related to indicating a second number of CSI sub-reports from the first number of CSI sub-reports,

fourth information related to an uplink (UL) channel for the CSI report, and

the one or more NZP CSI-RSs based on the first information; and

receive the UL channel with the CSI report including a third number of CSI sub-reports,

wherein the third number of CSI sub-reports are from the second number of CSI sub-reports based on the fourth information, and

wherein the second number of CSI sub-reports are based on the second information, the third information, and the one or more NZP CSI-RSs.

16 . The BS of claim 15 , wherein:

the first number of sets of parameters provide information related to a CSI codebook for the first number of CSI sub-reports, respectively,

a first set of parameters from the first number of sets of parameters indicates a single-panel CSI codebook type, and

a second set of parameters from the first number of sets of parameters indicates a multi-panel CSI codebook type.

17 . The BS of claim 15 , wherein the first number of sets of parameters provide, for the first number of CSI sub-reports, respectively, an offset value to power offset values of physical downlink shared channel (PDSCH) resource element (RE) to NZP CSI-RS RE of the one or more NZP CSI-RSs.

18 . The BS of claim 15 , wherein:

the first number of sets of parameters provide information related to a CSI codebook for the first number of CSI sub-reports, respectively, and

the information related to CSI codebook includes at least one of:

a number of antenna ports in a horizontal dimension,

a number of antenna ports in a vertical dimension,

a number of antenna panels,

a codebook subset restriction, and

a rank indication restriction.

19 . The BS of claim 15 , wherein:

the set of parameters that commonly apply to the first number of CSI sub-reports, provided by the second information, indicates semi-persistent CSI reporting on a physical uplink control channel (PUCCH);

the third information provides indexes for the second number of CSI sub-reports from the first number of CSI sub-reports; and

the third information is provided by a medium access control (MAC) control element (MAC CE) in a physical downlink shared channel (PDSCH) transmission.

20 . The BS of claim 15 , wherein:

the set of parameters that commonly apply to the first number of CSI sub-reports, provided by the second information, indicates aperiodic CSI reporting or semi-persistent CSI reporting on a physical uplink shared channel (PUSCH);

the third information is provided by:

a radio resource control (RRC) message in a physical downlink shared channel (PDSCH) transmission providing one or more candidate sets of indexes for the second number of CSI sub-reports, and

a downlink control information (DCI) format in a physical downlink control channel (PDCCH) transmission, according to a UE-specific search space, indicating an index from the one or more candidate sets of indexes provided by RRC message in a PDSCH transmission.