Channel state information report configuration
Apparatuses, methods, and systems are disclosed for channel state information (“CSI”) report configuration. One method includes receiving a CSI reporting setting. The CSI reporting setting includes a CSI reference signal (“RS”) resource setting, and the CSI reporting setting includes an indication of CSI feedback reporting for multiple transmission points. The method includes identifying transmission hypotheses based on the CSI reporting setting. The hypotheses include a combination of single-point transmission from a transmission and reception point (“TRP”), or multi-point joint transmission from two TRPs. The method includes receiving a CSI RS resource based on the CSI RS resource setting. The method includes generating a set of a CSI report based on the CSI reporting setting. The CSI report includes two parts. The method includes feeding back the set of the CSI report.
1 . A method at a user equipment (UE), the method comprising:
receiving at least one channel state information (CSI) reporting setting, wherein the at least one CSI reporting setting comprises at least one CSI reference signal (RS) (CSI-RS) resource setting, and the CSI reporting setting includes an indication of CSI feedback reporting for multiple transmission points in a mobile communication network;
identifying a set of transmission hypotheses based on the CSI reporting setting, wherein the hypotheses include a combination of single-point transmission from at least one transmission and reception point (TRP), or multi-point joint transmission from two TRPs;
receiving at least one CSI-RS resource transmitted from the mobile communication network based on the CSI-RS resource setting;
generating a set of at least one CSI report based on the CSI reporting setting, wherein the at least one CSI report comprises a value of one or more of a precoder matrix indicator (PMI), a rank indicator (RI), a CSI-RS resource indicator (CRI), a layer indicator (LI), a channel quality indicator (CQI), or a synchronization signal block resource indicator (SSBRI), and the at least one CSI report comprises two parts, wherein a number of bits in the at least one CSI report corresponding to the set of transmission hypotheses is calculated based on a number of hypotheses in the set of transmission hypotheses, and wherein the at least one CSI report further comprises an indicator corresponding to at least one transmission hypothesis of the set of transmission hypotheses, the indicator comprising a bitmap having a length equal to a size of the set of transmission hypotheses and included in a first part of the two parts of the at least one CSI report; and
feeding back the set of the at least one CSI report to the mobile communication network.
2 . The method of claim 1 , wherein the indication of CSI feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter indicates one or more of:
multiple TRP CSI reporting;
at least two CSI-RS identifiers corresponding to at least two CSI-RS resources;
two CSI-RS port groups per CSI-RS resource;
a number of CSI reports;
multiple codebook configurations;
a pair of report quantities; or
a transmission configuration indicator (TCI) codepoint in a downlink control information, wherein the TCI codepoint corresponds to two TCI states.
3 . The method of claim 1 , wherein up to multiple values of the one or more of the PMI, the RI, the CRI, the LI, the CQI, or the SSBRI are reported in the at least one CSI report.
4 . The method of claim 1 , wherein at least two values of each of the RI, the PMI, the LI, and the CQI are reported in the at least one CSI report.
5 . The method of claim 4 , wherein an indicator corresponding to a third RI value is reported in the at least one CSI report.
6 . The method of claim 1 , wherein an indicator corresponding to at least one transmission hypotheses of the set of transmission hypotheses is reported in a first part of the two parts of the at least one CSI report.
7 . The method of claim 6 , wherein the indicator comprises:
a bitmap with a length equivalent to a size of the set of transmission hypotheses; or
an indicator of a size corresponding to a base-2 logarithm of the size of the set of transmission hypotheses.
8 . The method of claim 1 , wherein multiple values of the CQI are reported in the at least one CSI report, and a first value of the multiple values of the CQI is reported in a first part of the two parts of the at least one CSI report, and a remainder of the multiple values of the CQI are reported in a second part of the two parts of the at least one CSI report.
9 . The method of claim 1 , wherein the PMI of the at least one CSI report comprises two parts.
10 . The method of claim 9 , wherein at least two values of the PMI are reported in the at least one CSI report, a first value of the at least two values of the PMI is reported in the at least one CSI report, and a first part of the two parts of a second value of the at least two values of the PMI is reported in the at least one CSI report.
11 . The method of claim 1 , wherein the at least one CSI report comprises two CSI reports, feeding back the set of the at least one CSI report comprises feeding back the two CSI reports, a first CSI report of the two CSI reports is reported in full, and a second CSI report of the two CSI reports is partially reported.
12 . The method of claim 1 , wherein the multi-point joint transmission from two TRPs corresponds to a transmission configuration indicator (TCI) codepoint comprising two TCI states.
13 . A method performed by a base station, the method comprising:
transmitting at least one channel state information (CSI) reporting setting, wherein the at least one CSI reporting setting comprises at least one CSI reference signal (RS) (CSI-RS) resource setting, the CSI reporting setting includes an indication of CSI feedback reporting for multiple transmission points in a mobile communication network, a set of transmission hypotheses is identified based on the CSI reporting setting, and the hypotheses include a combination of single-point transmission from at least one transmission and reception point (TRP), or multi-point joint transmission from two TRPs;
transmitting at least one CSI-RS resource transmitted based on the CSI-RS resource setting, wherein a set of at least one CSI report is generated based on the CSI reporting setting, the at least one CSI report comprises a value of one or more of a precoder matrix indicator (PMI), a rank indicator (RI), a CSI-RS resource indicator (CRI), a layer indicator (LI), a channel quality indicator (CQI), or a synchronization signal block resource indicator (SSBRI), and the at least one CSI report comprises two parts; and
receiving feedback comprising the set of the at least one CSI report, wherein a number of bits in the at least one CSI report corresponding to the set of transmission hypotheses is calculated based on a number of hypotheses in the set of transmission hypotheses, and wherein the at least one CSI report further comprises an indicator corresponding to at least one transmission hypothesis of the set of transmission hypotheses, the indicator comprising a bitmap having a length equal to a size of the set of transmission hypotheses and included in a first part of the two parts of the at least one CSI report.
14 . The method of claim 13 , wherein at least two values of each of the RI, the PMI, the LI, and the CQI are reported in the at least one CSI report.
15 . A base station, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the base station to:
transmit at least one channel state information (CSI) reporting setting, wherein the at least one CSI reporting setting comprises at least one CSI reference signal (RS) (CSI-RS) resource setting, the CSI reporting setting includes an indication of CSI feedback reporting for multiple transmission points in a mobile communication network, a set of transmission hypotheses is identified based on the CSI reporting setting, and the hypotheses include a combination of single-point transmission from at least one transmission and reception point (TRP), or multi-point joint transmission from two TRPs;
transmit at least one CSI-RS resource transmitted based on the CSI-RS resource setting, wherein a set of at least one CSI report is generated based on the CSI reporting setting, the at least one CSI report comprises a value of one or more of a precoder matrix indicator (PMI), a rank indicator (RI), a CSI-RS resource indicator (CRI), a layer indicator (LI), a channel quality indicator (CQI), or a synchronization signal block resource indicator (SSBRI), and the at least one CSI report comprises two parts; and
receive feedback comprising the set of the at least one CSI report, wherein a number of bits in the at least one CSI report corresponding to the set of transmission hypotheses is calculated based on a number of hypotheses in the set of transmission hypotheses, and wherein the at least one CSI report further comprises an indicator corresponding to at least one transmission hypothesis of the set of transmission hypotheses, the indicator comprising a bitmap having a length equal to a size of the set of transmission hypotheses and included in a first part of the two parts of the at least one CSI report.
16 . The base station of claim 15 , wherein the indication of CSI feedback reporting for multiple transmission points in the mobile communication network comprises a configuration parameter, and the configuration parameter indicates one or more of:
multiple TRP CSI reporting;
at least two CSI-RS identifiers corresponding to at least two CSI-RS resources;
two CSI-RS port groups per CSI-RS resource;
a number of CSI reports;
multiple codebook configurations;
a pair of report quantities; or
a transmission configuration indicator (TCI) codepoint in a downlink control information, wherein the TCI codepoint corresponds to two TCI states.
17 . The base station of claim 15 , wherein up to multiple values of the one or more of the PMI, the RI, the CRI, the LI, the CQI, or the SSBRI are reported in the at least one CSI report.
18 . The base station of claim 15 , wherein at least two values of each of the RI, the PMI, the LI, and the CQI are reported in the at least one CSI report.
19 . The base station of claim 18 , wherein an indicator corresponding to a third RI value is reported in the at least one CSI report.
20 . The base station of claim 15 , wherein an indicator corresponding to at least one transmission hypotheses of the set of transmission hypotheses is reported in a first part of the two parts of the at least one CSI report.