US 11,722,361 B2
Beam failure recovery
Kyle Jung-Lin Pan, Saint James, NY (US); Fengjun Xi, San Diego, CA (US); Afshin Haghighat, Ile-Bizard (CA); and Moon-il Lee, Melville, NY (US)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Filed by Sony Group Corporation, Tokyo (JP)
Filed on Aug. 2, 2021, as Appl. No. 17/391,071.
Application 17/391,071 is a continuation of application No. 16/475,735, granted, now 11,082,286, previously published as PCT/US2018/012563, filed on Jan. 5, 2018.
Claims priority of provisional application 62/519,614, filed on Jun. 14, 2017.
Claims priority of provisional application 62/500,884, filed on May 3, 2017.
Claims priority of provisional application 62/454,486, filed on Feb. 3, 2017.
Claims priority of provisional application 62/443,382, filed on Jan. 6, 2017.
Prior Publication US 2021/0359900 A1, Nov. 18, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 41/0654 (2022.01); H04B 7/06 (2006.01); H04B 7/08 (2006.01); H04L 5/00 (2006.01); H04W 56/00 (2009.01); H04W 74/08 (2009.01); H04W 72/21 (2023.01); H04W 72/23 (2023.01)
CPC H04L 41/0654 (2013.01) [H04B 7/0695 (2013.01); H04B 7/088 (2013.01); H04L 5/0048 (2013.01); H04W 56/001 (2013.01); H04W 72/21 (2023.01); H04W 72/23 (2023.01); H04W 74/0833 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method implemented in a wireless transmit receive unit (WTRU), the method comprising:
determining that a beam failure condition has occurred,
wherein the determining that the beam failure condition has occurred comprises monitoring at least one of a channel state information-reference signal (CSI-RS) or a synchronization signal block (SSB) to assess whether the beam failure condition has occurred;
identifying a candidate beam for resolving the beam failure condition;
transmitting a beam failure recovery request to a network entity using a Physical Random Access Channel (PRACH) resource or a Physical Uplink Control Channel (PUCCH) resource,
wherein the beam failure recovery request indicates the candidate beam identified by the WTRU; and
receiving a response associated with the beam failure recovery request from the network entity.