Patent ID: 11943677
Assignee: QUALCOMM INCORPORATED
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An apparatus for wireless communications, comprising:
one or more processors configured to:
cause the apparatus to communicate using beamforming with a base station (BS) via an active beam;
obtain a configuration in a radio resource control (RRC) signal from the BS, the configuration indicating one or more alternative beams for the apparatus to use to send one or more beam recovery messages to the BS when a beam failure associated with the active beam is detected at the apparatus and indicating a threshold for the apparatus to use for selecting an alternative beam from the one or more alternative beams, wherein the threshold comprises a directional threshold and a reference signal received power (RSRP) threshold associated with a channel state information reference signal and a synchronization signal, wherein when no alternative beam of the one or more alternative beams meets the directional threshold, the configuration indicates a best alternative beam of the one or more alternative beams based on the RSRP threshold;
detecting the beam failure associated with the active beam;
select an alternative beam from the one or more alternative beams based on the threshold, in response to the detection after the apparatus obtains the configuration; and
cause the apparatus to perform a random access channel procedure by at least in part transmitting a beam recovery request via the selected alternative beam, wherein the beam recovery request includes a random access channel message; and

one or more memories coupled with the one or more processors.