US 12,308,919 B2
Channel state information overhead reduction for multi-transmission reception point/panel and cell free multiple input, multiple output
Rana Ahmed Salem, Munich (DE); Mihai Enescu, Espoo (FI); Youngsoo Yuk, Seoul (KR); Keeth Saliya Jayasinghe Laddu, Espoo (FI); and Salah Eddine Hajri, Antony (FR)
Assigned to Nokia Technologies Oy, Espoo (FI)
Filed by NOKIA TECHNOLOGIES OY, Espoo (FI)
Filed on Mar. 20, 2024, as Appl. No. 18/611,528.
Application 18/611,528 is a continuation of application No. 17/753,348, granted, now 12,040,869, previously published as PCT/IB2019/057455, filed on Sep. 4, 2019.
Prior Publication US 2024/0235641 A1, Jul. 11, 2024
Int. Cl. H04B 7/06 (2006.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0634 (2013.01)] 28 Claims
OG exemplary drawing
 
15. An apparatus comprising:
at least one processor; and
at least one memory including computer program code,
the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
generate transmission and reception point (TRP) data representing respective channel state information (CSI) feedback for a plurality of TRPs connected to a network;
perform an identification operation on the TRP data to identify a subset of TRPs of the plurality of TRPs, each TRP of the identified subset of TRPs having a common portion within their respective CSI feedback; and
transmit, to the network, identification data representing the identified subset of TRPs,
wherein the CSI feedback for the plurality of TRPs is frequency domain CSI feedback including a respective frequency domain compression matrix Wf,
wherein the frequency domain compression matrix Wf for a first TRP of the subset of TRPs includes a shifted version of the frequency domain compression matrix Wf for a second TRP of the subset of TRPs,
and wherein the least one memory and the computer program code are further configured to, with the at least one processor, further cause the apparatus at least to:
transmit, to a primary TRP, an entire CSI feedback for the primary TRP, the CSI feedback for other TRPs of the subset of TRPs being deduced from the CSI feedback for the primary TRP.