US 12,132,545 B2
Channel state information reporting
Haitong Sun, Irvine, CA (US); Yushu Zhang, Beijing (CN); Wei Zeng, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); Ghaith N. Hattab, Santa Clara, CA (US); Ismael Gutierrez Gonzalez, San Jose, CA (US); Anchit Malhotra, Sunnyvale, CA (US); Louay Jalloul, Cupertino, CA (US); David Neumann, Munich (DE); and Ziyang Ju, Munich (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/259,886
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Feb. 12, 2020, PCT No. PCT/CN2020/074914
§ 371(c)(1), (2) Date Jan. 12, 2021,
PCT Pub. No. WO2021/159324, PCT Pub. Date Aug. 19, 2021.
Prior Publication US 2022/0052732 A1, Feb. 17, 2022
Int. Cl. H04B 7/06 (2006.01); H04J 13/00 (2011.01)
CPC H04B 7/0626 (2013.01) [H04B 7/063 (2013.01); H04B 7/0632 (2013.01); H04B 7/0639 (2013.01); H04J 13/004 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A processor configured to cause a wireless device to:
establish a radio resource control (RRC) connection with a cellular base station;
receive channel state information (CSI) reporting configuration information, wherein when the CSI reporting configuration information includes an indication to use a subband channel quality indicator (CQI) and a wideband precoding matrix indicator (PMI) format for 3GPP release 16 type II CSI reporting, the processor is further configured to cause the wireless device to:
perform 3GPP release 16 type II CSI reporting using a subband precoding matrix indicator (PMI) format based at least in part on the CSI reporting configuration information and without regard to a pmi-FormatIndicator parameter which is set to widebandPMI; and
perform 3GPP release 15 type II CSI reporting with the wideband PMI based at least in part on the CSI reporting configuration information, wherein if a rank indicator (RI) is 3 or 4, to perform the 3GPP release 15 type II CSI reporting with the wideband PMI, the processor is further configured to cause the wireless device to:
perform spatial basis selection for the CSI reporting in a layer common manner; and
report strongest coefficient indication, amplitude, phase, and number of non-zero spatial bases/polarizations for each layer.