US 11,736,210 B2
Interference measurements and channel state information feedback for multi-user multiple-in multiple-out
Shiwei Gao, Nepean (CA); Sebastian Faxér, Järfälla (SE); Mattias Frenne, Uppsala (SE); Stephen Grant, Pleasanton, CA (US); Robert Mark Harrison, Grapevine, TX (US); and Siva Muruganathan, Stittsville (CA)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Aug. 25, 2020, as Appl. No. 17/2,031.
Application 17/002,031 is a continuation of application No. 16/176,948, filed on Oct. 31, 2018, granted, now 10,778,348.
Application 16/176,948 is a continuation of application No. PCT/IB2018/053133, filed on May 4, 2018.
Claims priority of provisional application 62/502,454, filed on May 5, 2017.
Prior Publication US 2020/0389237 A1, Dec. 10, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 17/318 (2015.01); H04L 5/00 (2006.01); H04L 25/02 (2006.01); H04B 7/06 (2006.01); H04B 7/0452 (2017.01); H04B 17/345 (2015.01); H04J 11/00 (2006.01)
CPC H04B 17/318 (2015.01) [H04B 7/0452 (2013.01); H04B 7/0626 (2013.01); H04B 7/0632 (2013.01); H04B 7/0697 (2013.01); H04B 17/345 (2015.01); H04J 11/005 (2013.01); H04L 5/005 (2013.01); H04L 5/0023 (2013.01); H04L 5/0057 (2013.01); H04L 25/0206 (2013.01); H04L 25/0224 (2013.01); H04L 5/0053 (2013.01); H04L 5/0092 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for a user equipment, UE, the method comprising:
receiving signaling, by the UE, the signaling including:
a K+1 Non-Zero Power, NZP, NZP channel state information, CSI, reference signal, RS, configuration for K+1 NZP CSI-RS resources that are each shared by K+1 UE candidates;
a first NZP CSI-RS configuration for using a single NZP CSI-RS resource of the configured K+1 NZP CSI-RS resources for channel measurement;
a second NZP CSI-RS configuration for multiple user, MU, interference measurement, the second NZP CSI-RS configuration being for configuring K NZP CSI-RS resources of the configured K+1 NZP CSI-RS resources for the MU interference measurement, where K>=1; and
a CSI interference measurement, CSI-IM, configuration for interference measurement;
receiving a CSI feedback request, the CSI feedback request being associated with the signaled first NZP CSI-RS configuration, the second NZP CSI-RS configuration, and the CSI-IM configuration; and
responsive to the received CSI feedback request, measuring a downlink channel on the single first NZP CSI-RS resource corresponding to the first NZP CSI-RS configuration and measuring MU interference on each of the K NZP CSI-RS resources of the configured K+1 NZP CSI-RS resources that are associated with the second NZP CSI-RS configuration.