Directional sensing signal request
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first sensing signal transmitted by a base station. The UE may determine a preferred sensing direction for a second sensing signal based at least in part on the first sensing signal. The UE may transmit a directional sensing signal request to the base station. The directional sensing signal request may include information indicating the preferred sensing direction for the second sensing signal. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a first sensing signal transmitted by a network entity;
determining a preferred sensing direction for a second sensing signal based at least in part on the first sensing signal; and
transmitting a directional sensing signal request to the network entity, the directional sensing signal request including information indicating the preferred sensing direction for the second sensing signal, wherein the information indicating the preferred sensing direction for the second sensing signal includes precoding information associated with one or more delay-tap indices, each of the one or more delay-tap indices being associated with a respective delay-tap in a set of delay-taps.
2. The method of claim 1 , further comprising receiving the second sensing signal after transmitting the directional sensing signal request.
3. The method of claim 1 , wherein a bandwidth of the first sensing signal is smaller than a bandwidth of the second sensing signal.
4. The method of claim 1 , wherein a beam footprint of the first sensing signal is wider than a beam footprint of the second sensing signal.
5. The method of claim 1 , wherein each delay-tap index of the one or more delay-tap indices is associated with a respective observation in a set of observations of the first sensing signal in a different time domain resource.
6. The method of claim 1 , wherein the precoding information includes a set of precoding matrix indicators (PMIs) determined based at least in part on a Type-II channel state information (CSI) codebook, each of the set of PMIs being associated with a respective delay-tap in the set of delay-taps.
7. The method of claim 6 , wherein a quantization granularity of each delay-tap of the set of delay-taps is based at least in part on a quantity of delay-taps in the set of delay-taps.
8. The method of claim 1 , wherein the first sensing signal is rotated across a plurality of beams in a time domain, each beam of the plurality of beams having a different spatial direction.
9. The method of claim 8 , wherein the information indicating the preferred sensing direction for the second sensing signal includes one or more beam indices, each of the one or more beam indices corresponding to a beam of the plurality of beams.
10. A method of wireless communication performed by a network entity, comprising:
transmitting a first sensing signal;
receiving a directional sensing signal request from a user equipment (UE), the directional sensing signal request including information indicating a preferred sensing direction for a second sensing signal, wherein the information indicating the preferred sensing direction for the second sensing signal includes precoding information associated with one or more delay-tap indices, each of the one or more delay-tap indices being associated with a respective delay-tap in a set of delay-taps; and
transmitting the second sensing signal based at least in part on the directional sensing signal request.
11. The method of claim 10 , wherein a bandwidth of the first sensing signal is smaller than a bandwidth of the second sensing signal.
12. The method of claim 10 , wherein a beam footprint of the first sensing signal is wider than a beam footprint of the second sensing signal.
13. The method of claim 10 , wherein each delay-tap index of the one or more delay-tap indices is associated with a respective observation in a set of observations of the first sensing signal in a different time domain resource.
14. The method of claim 10 , wherein the precoding information includes a set of precoding matrix indicators (PMIs) determined based at least in part on a Type-II channel state information (CSI) codebook, each of the set of PMIs being associated with a respective delay-tap in the set of delay-taps.
15. The method of claim 14 , wherein a quantization granularity of each delay-tap of the set of delay-taps is based at least in part on a quantity of delay-taps in the set of delay-taps.
16. The method of claim 10 , wherein the first sensing signal is rotated across a plurality of beams in a time domain, each beam of the plurality of beams having a different spatial direction.
17. The method of claim 16 , wherein the information indicating the preferred sensing direction for the second sensing signal includes one or more beam indices, each of the one or more beam indices corresponding to a beam of the plurality of beams.
18. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
receive a first sensing signal transmitted by a network entity;
determine a preferred sensing direction for a second sensing signal based at least in part on the first sensing signal; and
transmit a directional sensing signal request to the network entity, the directional sensing signal request including information indicating the preferred sensing direction for the second sensing signal, wherein the information indicating the preferred sensing direction for the second sensing signal includes precoding information associated with one or more delay-tap indices, each of the one or more delay-tap indices being associated with a respective delay-tap in a set of delay-taps.
19. The UE of claim 18 , wherein the one or more processors are further configured to receive the second sensing signal after transmitting the directional sensing signal request.
20. The UE of claim 18 , wherein a bandwidth of the first sensing signal is smaller than a bandwidth of the second sensing signal or a beam footprint of the first sensing signal is wider than a beam footprint of the second sensing signal.
21. The UE of claim 18 , wherein the first sensing signal is rotated across a plurality of beams in a time domain, each beam of the plurality of beams having a different spatial direction.
22. The UE of claim 21 , wherein the information indicating the preferred sensing direction for the second sensing signal includes one or more beam indices, each of the one or more beam indices corresponding to a beam of the plurality of beams.
23. The UE of claim 21 , wherein the information indicating the preferred sensing direction for the second sensing signal includes one or more beam indices, each of the one or more beam indices corresponding to a beam of the plurality of beams.
24. The UE of claim 18 , wherein each delay-tap index of the one or more delay-tap indices is associated with a respective observation in a set of observations of the first sensing signal in a different time domain resource.
25. The UE of claim 18 , wherein the precoding information includes a set of precoding matrix indicators (PMIs) determined based at least in part on a Type-II channel state information (CSI) codebook, each of the set of PMIs being associated with a respective delay-tap in the set of delay-taps.
26. The UE of claim 25 , wherein a quantization granularity of each delay-tap of the set of delay-taps is based at least in part on a quantity of delay-taps in the set of delay-taps.
27. A network entity for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to:
transmit a first sensing signal;
receive a directional sensing signal request from a user equipment (UE), the directional sensing signal request including information indicating a preferred sensing direction for a second sensing signal, wherein the information indicating the preferred sensing direction for the second sensing signal includes precoding information associated with one or more delay-tap indices, each of the one or more delay-tap indices being associated with a respective delay-tap in a set of delay-taps; and
transmit the second sensing signal based at least in part on the directional sensing signal request.
28. The network entity of claim 27 , wherein a bandwidth of the first sensing signal is smaller than a bandwidth of the second sensing signal or a beam footprint of the first sensing signal is wider than a beam footprint of the second sensing signal.
29. The network entity of claim 27 , wherein the first sensing signal is rotated across a plurality of beams in a time domain, each beam of the plurality of beams having a different spatial direction.
30. The network entity of claim 29 , wherein the information indicating the preferred sensing direction for the second sensing signal includes one or more beam indices, each of the one or more beam indices corresponding to a beam of the plurality of beams.