Sidelink beam failure detection

A second node for wireless communication, comprising:

• a memory;
• and
• one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
• determine whether a first signal is received from a first node on a beamformed link from the first node to the second node,
• wherein the first node and the second node are associated with common timing;
• determine whether to transmit, on a beamformed link from the second node to the first node, a second signal based at least in part on whether the first signal is received;
• and
• receive a third signal based at least in part on the second signal;
• or
• perform a sidelink beam failure recovery procedure based at least in part on failing to receive the first signal or the third signal.

A method of wireless communication performed by a first node, comprising:

• transmitting, to a second node on a beamformed link from the first node to the second node, a first signal,
• wherein the first node and the second node are associated with common timing;
• determining whether a second signal, based at least in part on the first signal, is received on a beamformed link from the second node to the first node;
• and
• transmitting a third signal on the beamformed link from the first node to the second node based at least in part on receiving the second signal;
• or
• performing a sidelink beam failure recovery procedure based at least in part on determining that the second signal is not received.

A method of wireless communication performed by a second node, comprising:

• determining whether a first signal is received from a first node on a beamformed link from the first node to the second node,
• wherein the first node and the second node are associated with common timing;
• determining whether to transmit, on a beamformed link from the second node to the first node, a second signal based at least in part on whether the first signal is received;
• and
• receiving a third signal based at least in part on the second signal;
• or
• performing a sidelink beam failure recovery procedure based at least in part on failing to receive the first signal or the third signal.