US 12,113,592 B2
CSI-based precoding in search space subset
Saeedeh Moloudi, Linköping (SE); and Anders Wallén, Ystad (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/600,036
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jan. 31, 2020, PCT No. PCT/SE2020/050088
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/204775, PCT Pub. Date Oct. 8, 2020.
Claims priority of provisional application 62/826,530, filed on Mar. 29, 2019.
Claims priority of provisional application 62/826,571, filed on Mar. 29, 2019.
Claims priority of provisional application 62/842,558, filed on May 3, 2019.
Prior Publication US 2022/0190891 A1, Jun. 16, 2022
Int. Cl. H04B 7/04 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01); H04L 1/00 (2006.01)
CPC H04B 7/0456 (2013.01) [H04B 7/0639 (2013.01); H04B 7/0695 (2013.01); H04L 1/0038 (2013.01); H04B 7/0626 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A method performed by a wireless device for decoding a transmission, the method comprising:
determining a plurality of Machine-Type Communications, MTC, Physical Downlink Control Channel, MPDCCH, transmission candidates to monitor;
for at least one candidate of the plurality of MPDCCH transmission candidates, determining whether the candidate belongs to a first group of candidates or a second group of candidates where the first group of candidates comprises a first subset of a first search space and the second group of candidates comprises the combination of a second search space and a second subset of the first search space, where the second subset is a complement of the first subset and the first search space comprises a User Equipment, UE,-specific search space and the second search space comprises a Type 0-MPDCCH common search space;
if the candidate belongs to the first group of candidates, attempting to decode the MPDCCH transmission using a Channel State Information, CSI,-based precoding scheme; and
if the candidate belongs to the second group of candidates, attempting to decode the MPDCCH transmission using a predetermined precoding scheme.