US 11,990,974 B2
Technique for beam failure detection
Min Wang, Luleå (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/922,046
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed May 11, 2021, PCT No. PCT/EP2021/062506
§ 371(c)(1), (2) Date Oct. 28, 2022,
PCT Pub. No. WO2021/228869, PCT Pub. Date Nov. 18, 2021.
Claims priority of provisional application 63/024,964, filed on May 14, 2020.
Prior Publication US 2023/0170968 A1, Jun. 1, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/08 (2006.01); H04W 74/0833 (2024.01); H04W 76/18 (2018.01)
CPC H04B 7/0695 (2013.01) [H04B 7/088 (2013.01); H04W 74/0833 (2013.01); H04W 76/18 (2018.02)] 26 Claims
OG exemplary drawing
 
1. A method, performed by a radio device, the method comprising:
receiving a control message from a radio access network (RAN), the control message indicating a spatial relation between a first physical channel and a second physical channel;
monitoring a transmission or transmission attempt to a radio access node on the second physical channel, the transmission or transmission attempt using a filter in the spatial domain configured for the first physical channel according to the spatial relation;
determining that a result of the monitoring indicates a failure of the transmission or transmission attempt by indicating:
interference and/or congestion on the second physical channel; or
that a contention-based protocol or a listen-before talk protocol has failed or indicates that the second physical channel is occupied, wherein the transmission or transmission attempt on the second physical channel comprises the contention-based protocol or the listen-before talk protocol; and
performing Beam Failure Detection (BFD) for a radio beam between the radio device and the radio access node based on the result of the monitoring.