Method and apparatus for CSI reporting
A method for operating a user equipment (UE) comprises receiving a configuration about a channel state information (CSI) report, the configuration including information about a time interval W for the CSI report, the time interval W comprising multiple time slots; and a number (Y) of channel quality indicator (CQI) values associated with the time interval W; deriving, based on the configuration, the Y CQI values, each of the Y CQI values at a corresponding time slot in the time interval W, wherein the Y CQI values satisfy a block error (BLER) probability requirement; and transmitting the CSI report including the Y CQI values, wherein Y≥1.
1. A user equipment (UE) comprising:
a transceiver configured to:
receive a configuration about a channel state information (CSI) report, the configuration including information about:
a time interval W for the CSI report, the time interval W including C time slots, [l,l+C−1], where l is a value of a slot index and C is a value of a time slot; and
a number (Y) of channel quality indicator (CQI) values associated with the time interval W, where Y≥1; and
a processor operably coupled to the transceiver, the processor configured to:
derive, based on the configuration, the Y CQI values, each of the Y CQI values at a corresponding time slot in the time interval W, wherein:
the Y CQI values satisfy a block error (BLER) probability requirement, and
the transceiver is configured to transmit the CSI report including the Y CQI values, wherein the Y COI values are reported in a same CSI report when Y>1.
2. The UE of claim 1 , wherein:
the C time slots, [l,l+C−1], are no earlier than a time slot n ref of a CSI reference resource, and
the C time slots do not include a non-zero power CSI reference signal (NZP CSI-RS) resource for channel measurement.
3. The UE of claim 1 , wherein Y=1 and a CQI value is associated with a time slot s in the time interval W.
4. The UE of claim 1 , wherein:
Y >1,
the time interval W comprises Y parts, W 1 , . . . W Y , and
for each part yϵ{1, . . . , Y}, one CQI value is associated with a time slot s y in the part W y .
5. The UE of claim 4 , wherein:
either s y >n ref for all y, or
s 1 =n ref and s y >n ref for y>1, where n ref is a time slot of a CSI reference resource.
6. The UE of claim 1 , wherein:
the configuration includes information about a CSI reference signal (CSI-RS) burst comprising B≥1 time instances of CSI-RS transmission, and
the processor is further configured to:
measure the CSI-RS burst, and
determine, based on the measurement of the CSI-RS burst, a pre-coding matrix indicator (PMI) and the Y CQI values,
where the PMI indicates precoding matrices for time slots in the time interval W, and the Y CQI values are conditioned on the PMI,
when the frequency domain (FD) granularity for the CQI is wideband, the Y CQI values are for a CSI reporting band, and
when the FD granularity for the CQI is subband (SB), the Y CQI values are determined for each SB in the CSI reporting band.
7. A base station (BS) comprising:
a processor configured to generate a configuration about a channel state information (CSI) report, the configuration including information about:
a time interval W for the CSI report, the time interval W including C time slots, [l,l+C−1], where l is a value of a slot index and C is a value of a time slot; and
a number (Y) of channel quality indicator (CQI) values associated with the time interval W, where Y≥1; and
a transceiver operably coupled to the processor, the transceiver configured to:
transmit the configuration; and
receive the CSI report, wherein:
the CSI report includes the Y CQI values,
the Y CQI values are based on the configuration,
each of the Y CQI values is at a corresponding time slot in the time interval W,
the Y CQI values satisfy a block error (BLER) probability requirement, and
the Y COI values are reported in a same CSI report when Y >1.
8. The BS of claim 7 , wherein:
the C time slots, [l,l+C−1], are no earlier than a time slot n ref of a CSI reference resource, and
the C time slots do not include a non-zero power CSI reference signal (NZP CSI-RS) resource for channel measurement.
9. The BS of claim 7 , wherein Y=1 and a CQI value is associated with a time slot s in the time interval W.
10. The BS of claim 7 , wherein:
Y >1,
the time interval W comprises Y parts, W 1 , . . . W Y , and
for each part yϵ{1, . . . , Y}, one CQI value is associated with a time slot s y in the part W y .
11. The BS of claim 10 , wherein:
either s y >n ref for all y, or
s 1 =n ref and s y >n ref for y>1, where n ref is a time slot of a CSI reference resource.
12. A method for operating a user equipment (UE), the method comprising:
receiving a configuration about a channel state information (CSI) report, the configuration including information about:
a time interval W for the CSI report, the time interval W including C time slots, [l,l+C−1], where l is a value of a slot index and C is a value of a time slot; and
a number (Y) of channel quality indicator (CQI) values associated with the time interval W, where Y≥1;
deriving, based on the configuration, Y CQI values, each of the Y CQI values at a corresponding time slot in the time interval W, wherein the Y CQI values satisfy a block error (BLER) probability requirement; and
transmitting the CSI report including the Y CQI values,
wherein the Y CQI values are reported in a same CSI report when Y>1.
13. The method of claim 12 , wherein:
the C time slots, [l,l+C−1], are no earlier than a time slot n ref of a CSI reference resource, and
the C time slots do not include a non-zero power CSI reference signal (NZP CSI-RS) resource for channel measurement.
14. The method of claim 12 , wherein Y=1 and a CQI value is associated with a time slot s in the time interval W.
15. The method of claim 12 , wherein:
Y >1,
the time interval W comprises Y parts, W 1 , . . . W Y , and
for each part yϵ{1, . . . , Y}, one CQI value is associated with a time slot s y in the part W y .
16. The method of claim 15 , wherein:
either s y >n ref for all y, or
s 1 =n ref and s y >n ref for y>1, where n ref is a time slot of a CSI reference resource.
17. The method of claim 12 , wherein the configuration includes information about a CSI reference signal (CSI-RS) burst comprising B≥1 time instances of CSI-RS transmission, and
the method further comprises:
measuring the CSI-RS burst, and
determining, based on the measurement of the CSI-RS burst, a pre-coding matrix indicator (PMI) and the Y CQI values,
where the PMI indicates precoding matrices for time slots in the time interval W, and the Y CQI values are conditioned on the PMI,
when the frequency domain (FD) granularity for the CQI is wideband, the Y CQI values are for a CSI reporting band, and
when the FD granularity for the CQI is subband (SB), the Y CQI values are determined for each SB in the CSI reporting band.