US 12,004,146 B2
Dynamic channel state information reference signals (CSI-RS) resource mapping configuration for precoded channel state information reference signals (CSI-RS) configurations
Rana Ahmed Salem, Munich (DE); Eugene Visotsky, Buffalo Grove, IL (US); Salah Eddine Hajri, Antony (FR); Frederick Vook, Schaumburg, IL (US); Marco Maso, Issy les Moulineaux (FR); William Hillery, Lafayette, IN (US); and Filippo Tosato, Bures sur Yvette (FR)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Mar. 31, 2021, as Appl. No. 17/218,864.
Claims priority of provisional application 63/034,600, filed on Jun. 4, 2020.
Prior Publication US 2021/0385828 A1, Dec. 9, 2021
Int. Cl. H04W 72/04 (2023.01); H04B 7/06 (2006.01); H04L 1/1607 (2023.01); H04L 5/00 (2006.01); H04W 72/1263 (2023.01); H04W 72/23 (2023.01); H04W 76/27 (2018.01); H04W 80/02 (2009.01)
CPC H04W 72/1263 (2013.01) [H04B 7/0626 (2013.01); H04L 1/1614 (2013.01); H04L 5/0051 (2013.01); H04W 72/23 (2023.01); H04W 76/27 (2018.02); H04W 80/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method, comprising:
determining, at a network node, information relating to an actual number of ports configured for a user equipment for channel measurements;
determining a pool of channel state information reference signal (CSI-RS) resources for the user equipment, wherein the pool of channel state information reference signal (CSI-RS) resources is provided in a radio resource control (RRC) configuration and includes an excess number of ports compared to the actual number of ports; and
transmitting to the user equipment an RRC configuration comprising a list of a plurality of N possible CSI-RS resource mappings, a medium access (MAC) control element (CE) comprising a plural subset Nα of the plurality of N possible CSI-RS resource mappings that are activated, and downlink control information (DCI) comprising an indication of which of the plural subset Nα of active resource mappings is to be selected as configured user equipment specific mapping for the pool of channel state information reference signal (CSI-RS) resources, wherein the user equipment specific mapping is performed over different sub-groups of CSI-RS resources and the different sub-groups of CSI-RS resources are updated at different times.