Apple Inc.
Beam indication considering beam failure recovery in new radio

Abstract:

Technology for a user equipment (UE) configured to perform beam failure recovery. The UE can encode a beam failure recovery (BFR) request for transmission on a physical random-access channel (PRACH) or a physical uplink control channel (PUCCH) to a next generation node B (gNB). The UE can monitor a dedicated physical downlink control channel (PDCCH) control resource set (CORESET) for a response from the gNB to the beam failure recovery request. The UE can select a default physical downlink shared channel (PDSCH) beam, wherein it is assumed, at the UE that a same quasi co-location (QCL) assumption for a PDSCH as a QCL assumption for the dedicated PDCCH CORESET; or a PDSCH demodulation reference signal (DMRS) is QCLed with a downlink (DL) reference signal (RS) of an identified candidate beam by the UE. The UE can decode a beam failure recovery request response from the gNB.