	US 11,997,665 B2
	Method and apparatus for beam recovery in next generation wireless systems
Li Guo, Allen, TX (US); Md. Saifur Rahman, Plano, TX (US); and Eko Onggosanusi, Coppell, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Aug. 27, 2021, as Appl. No. 17/446,205.
Application 17/446,205 is a continuation of application No. 15/945,589, filed on Apr. 4, 2018, granted, now 11,134,492.
Claims priority of provisional application 62/607,714, filed on Dec. 19, 2017.
Claims priority of provisional application 62/587,210, filed on Nov. 16, 2017.
Claims priority of provisional application 62/572,890, filed on Oct. 16, 2017.
Claims priority of provisional application 62/563,987, filed on Sep. 27, 2017.
Claims priority of provisional application 62/561,003, filed on Sep. 20, 2017.
Claims priority of provisional application 62/543,596, filed on Aug. 10, 2017.
Claims priority of provisional application 62/533,823, filed on Jul. 18, 2017.
Claims priority of provisional application 62/529,918, filed on Jul. 7, 2017.
Claims priority of provisional application 62/522,349, filed on Jun. 20, 2017.
Claims priority of provisional application 62/513,083, filed on May 31, 2017.
Claims priority of provisional application 62/504,902, filed on May 11, 2017.
Claims priority of provisional application 62/487,235, filed on Apr. 19, 2017.
Claims priority of provisional application 62/484,653, filed on Apr. 12, 2017.
Prior Publication US 2021/0392634 A1, Dec. 16, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/044 (2023.01); H04B 7/06 (2006.01); H04B 7/08 (2006.01); H04B 17/309 (2015.01); H04L 5/00 (2006.01); H04W 72/23 (2023.01); H04W 52/14 (2009.01); H04W 52/24 (2009.01); H04W 52/42 (2009.01); H04W 84/04 (2009.01)

CPC H04W 72/046 (2013.01) [H04B 7/0617 (2013.01); H04B 7/0695 (2013.01); H04B 7/088 (2013.01); H04B 17/309 (2015.01); H04L 5/0051 (2013.01); H04L 5/0053 (2013.01); H04L 5/0085 (2013.01); H04W 72/23 (2023.01); H04W 52/146 (2013.01); H04W 52/242 (2013.01); H04W 52/42 (2013.01); H04W 84/042 (2013.01)]

15 Claims

1. A user equipment (UE) in a wireless communication system, the UE comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

receive, from a base station (BS), configuration information including information associated with a set of preamble sequences for a beam failure recovery,

receive, from the BS, at least one first reference signal (RS) on a first RS resource, for detecting a beam failure, wherein the first RS resource is identified based on an RS index indicated by a transmission configuration indication (TCI) state of control resource sets (CORESETs), wherein the TCI state indicates quasi-collocation properties for receptions of physical control channels (PDCCHs) in the CORESET by the UE,

identify a beam failure based on a received power of the at least one first RS being smaller than a first threshold,

receive, from the BS, at least one second RS on a second RS resource, for identifying a candidate beam,

identify the candidate beam based on a received power of the at least one second RS being larger than a second threshold,

transmit, to the BS, a preamble sequence from the set of preamble sequences for requesting the beam failure recovery on a physical random access channel (PRACH), in case that the beam failure is identified, wherein the preamble sequence is identified from a set of preamble sequences for the beam failure recovery and is associated with the at least one second RS, and

receive, from the BS, a response of the preamble sequence.