Sidelink beam failure detection
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first node may transmit, 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; determine 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 transmit a third signal based at least in part on receiving the second signal or perform a sidelink beam failure recovery procedure based at least in part on determining that the second signal is not received. Numerous other aspects are provided.
1. A first node for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit, to a second node and on a beamformed link from the first node to the second node, a first signal; and
perform a sidelink beam failure recovery procedure based at least in part on a second signal, associated with the first signal, not being received on a beamformed link from the second node to the first node,
wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
2. The first node of claim 1 , wherein at least one of the first signal or the second signal comprises channel state information reference signals.
3. The first node of claim 1 , wherein the first signal and the second signal are associated with respective resource allocations that are known to the first node and the second node before transmission of the first signal.
4. The first node of claim 3 , wherein the respective resource allocations are determined by one or more of the first node or the second node.
5. The first node of claim 3 , wherein the respective resource allocations are determined by a base station associated with the first node or the second node.
6. The first node of claim 1 , wherein the first node and the second node are associated with common timing.
7. The first node of claim 6 , wherein the common timing is based at least in part on a base station associated with the first node and the second node.
8. The first node of claim 6 , wherein the common timing is based at least in part on positioning systems of the first node and the second node.
9. The first node of claim 1 , wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are associated with a ProSe sidelink interface.
10. The first node of claim 1 , wherein the first node and the second node comprise user equipment.
11. The first node of claim 1 , wherein the first node and the second node comprise integrated access and backhaul nodes.
12. The first node of claim 1 , wherein the one or more processors, to perform the sidelink beam failure recovery procedure, are configured to perform the sidelink beam failure recovery procedure based at least in part on failing to receive the second signal a threshold number of times.
13. A method of wireless communication performed by a first node, comprising:
transmitting, to a second node and on a beamformed link from the first node to the second node, a first signal; and
performing a sidelink beam failure recovery procedure based at least in part on a second signal, associated with the first signal, not being received on a beamformed link from the second node to the first node,
wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
14. The method of claim 13 , wherein at least one of the first signal or the second signal comprises channeling state information reference signals.
15. The method of claim 13 , wherein the first signal and the second signal are associated with respective resource allocations that are known to the first node and the second node before transmission of the first signal.
16. The method of claim 15 , wherein the respective resource allocations are determined by one or more of the first node or the second node.
17. The method of claim 15 , wherein the respective resource allocations are determined by a base station associated with the first node or the second node.
18. The method of claim 13 , wherein the first node and the second node are associated with common timing.
19. The method of claim 18 , wherein the common timing is based at least in part on a base station associated with the first node and the second node.
20. The method of claim 18 , wherein the common timing is based at least in part on positioning systems of the first node and the second node.
21. The method of claim 13 , wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are associated with a ProSe sidelink interface.
22. The method of claim 13 , wherein the first node and the second node comprise user equipment.
23. The method of claim 13 , wherein the first node and the second node comprise integrated access and backhaul nodes.
24. The method of claim 13 , wherein performing the sidelink beam failure recovery procedure comprises performing the sidelink beam failure recovery procedure based at least in part on failing to receive the second signal a threshold number of times.
25. A first apparatus for wireless communication, comprising:
means for transmitting, to a second apparatus and on a beamformed link from the first apparatus to the second apparatus, a first signal; and
means for performing a sidelink beam failure recovery procedure based at least in part on a second signal, associated with the first signal, not being received on a beamformed link from the second apparatus to the first apparatus,
wherein the beamformed link from the first apparatus to the second apparatus and the beamformed link from the second apparatus to the first apparatus are a same link.
26. The first apparatus of claim 25 , wherein at least one of the first signal or the second signal comprises channel state information reference signals.
27. The first apparatus of claim 25 , wherein the first signal and the second signal are associated with respective resource allocations that are known to the first apparatus and the second apparatus before transmission of the first signal.
28. The first apparatus of claim 25 , wherein the first apparatus and the second apparatus are associated with common timing.
29. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a first node, cause the first node to:
transmit, to a second node and on a beamformed link from the first node to the second node, a first signal; and
perform a sidelink beam failure recovery procedure based at least in part on a second signal, associated with the first signal, not being received on a beamformed link from the second node to the first node,
wherein the beamformed link from the first node to the second node and the beamformed link from the second node to the first node are a same link.
30. The non-transitory computer-readable medium of claim 29 , wherein the first node and the second node are associated with common timing.