Beam squint profiling, indication, and reporting for positioning and sensing

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

at least one memory; and

at least one processor coupled to the at least one memory, and the at least one processor is configured to:

obtain beam squint information associated with a set of beams of the UE under a plurality of center frequencies, wherein the beam squint information for each beam in the set of beams includes at least one of: a set of equivalent isotropic radiated power (EIRP) measurements for the plurality of center frequencies under different angles, a first difference between the set of EIRP measurements of a reference center frequency in the plurality of center frequencies and one or more non-reference center frequencies in the plurality of center frequencies under the different angles, an angle of a maximum EIRP measurement for each center frequency in the plurality of center frequencies, a second difference between angles of maximum EIRP measurements of the reference center frequency in the plurality of center frequencies and the one or more non-reference center frequencies in the plurality of center frequencies, or a combination thereof;

receive, from a network entity, a request to provide the beam squint information;

transmit, for the network entity based on the request, the beam squint information for one or more beams in the set of beams; and

perform, based on the beam squint information, positioning of the UE using at least one beam in the one or more beams.

2 . The apparatus of claim 1 , wherein to obtain the beam squint information, the at least one processor is configured to obtain the beam squint information for the one or more beams in the set of beams based on interpolation.

3 . The apparatus of claim 1 , wherein the at least one processor is further configured to store the beam squint information in the at least one memory or a storage of the UE, and wherein to obtain the beam squint information, the at least one processor is configured to:

load the beam squint information from the at least one memory or the storage of the UE.

4 . The apparatus of claim 1 , wherein to receive the request, the at least one processor is configured to receive the request via a capability request message, and wherein to transmit the beam squint information, the at least one processor is configured to transmit the beam squint information via a capability indication message.

5 . The apparatus of claim 4 , wherein the capability request message and the capability indication message are associated with at least one of a capability transfer procedure or a capability indication procedure.

6 . The apparatus of claim 1 , wherein the at least one processor is further configured to:

receive, from the network entity, a second request to perform the positioning of the UE via a request message, wherein to transmit the beam squint information, the at least one processor is configured to transmit the beam squint information via a provide message.

7 . The apparatus of claim 6 , wherein the request message and the provide message are associated with a location information transfer procedure.

8 . The apparatus of claim 1 , wherein the set of beams includes one or more transmission (Tx) beams, one or more reception (Rx) beams, or a combination thereof.

9 . The apparatus of claim 1 , wherein the at least one processor is further configured to:

receive, from the network entity, second beam squint information associated with at least one transmission (Tx) beam of at least one transmission-reception point (TRP) associated with the positioning of the UE.

10 . The apparatus of claim 9 , wherein to receive the second beam squint information, the at least one processor is configured to receive the second beam squint information via assistance data or a request location information message.

11 . The apparatus of claim 9 , wherein the positioning of the UE is associated with angle-of-departure (AoD) positioning, and wherein the at least one processor is further configured to:

receive a set of positioning reference signals (PRSs) from the at least one Tx beam of the at least one TRP; and

estimate the AoD for the set of PRSs based on the second beam squint information.

12 . An apparatus for wireless communication at a base station, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, and the at least one processor is configured to:

obtain beam squint information associated with a set of beams of the base station under a plurality of center frequencies;

receive, from a location server or a location management function (LMF), a request to provide the beam squint information via a transmission-reception point (TRP) information request message;

transmit, for the location server or the LMF based on the request and via a TRP information response message, the beam squint information for one or more beams in the set of beams; and

perform, based on the beam squint information, positioning of a user equipment (UE) using at least one beam in the one or more beams.

13 . The apparatus of claim 12 , wherein the TRP information request message and the TRP information response message are associated with a TRP information exchange procedure.

14 . An apparatus for wireless communication at a base station, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, and the at least one processor is configured to:

obtain beam squint information associated with a set of beams of the base station under a plurality of center frequencies;

receive, from a location server or a location management function (LMF), a request to perform positioning of a user equipment (UE) via a request message;

transmit, for the location server or the LMF via a provide message, the beam squint information for one or more beams in the set of beams that are to be used for the positioning of the UE; and

perform, based on the beam squint information, the positioning of the UE using at least one beam in the one or more beams.

15 . The apparatus of claim 14 , wherein the request message and the provide message are associated with a position information exchange procedure or a measurement information exchange procedure.

16 . The apparatus of claim 14 , wherein the positioning of the UE is associated with angle-of-arrival (AoA) positioning and the one or more beams in the set of beams include a set of reception (Rx) beams for the base station.

17 . An apparatus for wireless communication at a base station, comprising:

at least one memory; and

at least one processor coupled to the at least one memory, and the at least one processor is configured to:

obtain beam squint information associated with a set of beams of the base station under a plurality of center frequencies;

receive, from a location server or a location management function (LMF), second beam squint information associated with at least one transmission (Tx) beam of a user equipment (UE) associated with positioning of the UE;

transmit, for the location server or the LMF, the beam squint information for one or more beams in the set of beams that are to be used for the positioning of the UE; and

perform, based on the beam squint information and the second beam squint information, the positioning of the UE using at least one beam in the one or more beams.

18 . The apparatus of claim 17 , wherein to receive the second beam squint information the at least one processor is configured to receive the second beam squint information via an assistance information control message associated with an assistance information exchange procedure or via a positioning information request message associated with a position information exchange procedure.

19 . The apparatus of claim 17 , wherein the positioning of the UE is associated with angle-of-arrival (AoA) positioning, and wherein to perform, based on the second beam squint information, the positioning of the UE, the at least one processor is configured to:

receive a set of sounding reference signals (SRSs) from the at least one Tx beam of the UE; and

estimate the AoA for the set of SRSs based on the second beam squint information.