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

Claim 16:
17. 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 reference signal received power (RSRP) threshold associated with a channel state information reference signal and a synchronization signal;
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;
determine that no alternative beam of the one or more alternative beams meets a direction criterion; and
cause the apparatus to transmit the beam recovery request in a same direction as the active beam; and

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