US 12,218,728 B2
Methods and apparatuses for joint CSI measurement in NCJT
Nazli Khan Beigi, Longueuil (CA); Afshin Haghighat, Ile-Bizard (CA); Young Woo Kwak, Woodbury, NY (US); and Moon Il Lee, Melville, NY (US)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Appl. No. 18/272,002
Filed by INTERDIGITAL PATENT HOLDINGS, INC., Wilmington, DE (US)
PCT Filed Jan. 12, 2022, PCT No. PCT/US2022/012186
§ 371(c)(1), (2) Date Jul. 12, 2023,
PCT Pub. No. WO2022/155250, PCT Pub. Date Jul. 21, 2022.
Claims priority of provisional application 63/249,392, filed on Sep. 28, 2021.
Claims priority of provisional application 63/136,513, filed on Jan. 12, 2021.
Prior Publication US 2024/0072865 A1, Feb. 29, 2024
Int. Cl. H04L 5/12 (2006.01); H04B 7/06 (2006.01); H04L 25/02 (2006.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0617 (2013.01); H04L 25/0228 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a Wireless Transmit/Receive Unit (WTRU), the method comprising:
receiving one or more first channel state information reference signals (CSI-RSs) from each of a first transmit/receive point (TRP) and a second TRP;
determining, based on the one or more received first CSI-RSs, first respective CSI quantities associated with each of the first TRP and the second TRP;
selecting, based on the first respective CSI quantities, one of the first TRP or the second TRP as a primary TRP and a remaining one of the first TRP or the second TRP as a secondary TRP;
reporting information indicating at least the first respective CSI quantity associated with the primary TRP, wherein the one or more second CSI-RSs received from the primary TRP are precoded based on at least the first respective reported CSI quantity associated with the primary TRP;
receiving one or more second CSI-RSs from the primary TRP;
determining, based on the one or more second CSI-RSs received from the primary TRP, a second CSI quantity and a first precoding matrix indicator (PMI) for the primary TRP;
determining a channel coding parameter associated with the precoded one or more second CSI-RSs received from the primary TRP and associated with the determined first PMI for the primary TRP;
receiving one or more third CSI-RSs from the secondary TRP;
determining, based on the one or more third CSI-RSs received from the secondary TRP, a second CSI quantity associated with the secondary TRP;
determining, based on the determined channel coding parameter associated with the one or more second CSI-RSs and associated with the second CSI quantity associated with the secondary TRP, a second PMI for the secondary TRP that reduces inter-layer interference between the primary TRP and the secondary TRP; and
reporting information indicating the determined second PMI for the secondary TRP.