Signaling for sidelink beam failure recovery

One or more processors configured to cause a first user equipment (UE) to perform operations comprising:

• transmitting, to a second user equipment, a beam failure recovery request (BFRQ) message to recover from a beam failure for a sidelink beam pair for unidirectional sidelink communication, the request identifying a new sidelink beam pair;
• receiving, from the second user equipment, a response message confirming that the second user equipment is configured for communicating using the new sidelink beam pair that is identified in the BFRQ message;
• and
• activating, based on the response message, a beam specified in the new sidelink beam pair.

An apparatus comprising:

• a transceiver;
• one or more processors;
• a memory storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
• encoding, for transmission by the transceiver to a base station, a beam failure recovery request (BFRQ) report to recover a beam failure for a sidelink beam pair for unidirectional sidelink communication, the report not identifying a new sidelink beam pair, wherein the base station is configured to send, to a second user equipment, a downlink control information (DCI) message that triggers a beam pairing procedure for the second user equipment;
• and
• decoding a beam pairing message received by the transceiver from the second user equipment.