Method and apparatus for multi-hypothesis measurement via configuration in RF sensing

1 . An apparatus for wireless communications at a sensing node, comprising:

memory; and

at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:

receive, from a sensing entity, a sensing configuration, wherein the sensing configuration indicates a total number of sensing hypotheses and at least a first sensing hypothesis and a second sensing hypothesis that is different from the first sensing hypothesis;

measure a first set of sensing measurement data associated with the first sensing hypothesis and a second set of sensing measurement data associated with the second sensing hypothesis; and

transmit, for the sensing entity, at least one of: (1) the first set of sensing measurement data and the second set of sensing measurement data, or (2) an indication of the first sensing hypothesis and the second sensing hypothesis.

2 . The apparatus of claim 1 , wherein the sensing node is at least one of a first user equipment (UE), a sidelink (SL) UE, a transmission-reception point (TRP), a roadside unit (RSU), or a positioning reference unit (PRU), and wherein the sensing entity is at least one of a second UE, a network node, a network entity, or a location management function (LMF).

3 . The apparatus of claim 1 , wherein the first sensing hypothesis corresponds to a subset of sensing occasions of a sensing resource set and the second sensing hypothesis corresponds to a full set of the sensing occasions of the sensing resource set; and

wherein to measure the first set of sensing measurement data associated with the first sensing hypothesis and the second set of sensing measurement data associated with the second sensing hypothesis, the at least one processor is configured to measure the first set of sensing measurement data associated with the first sensing hypothesis in the subset of the sensing occasions of the sensing resource set and the second set of sensing measurement data associated with the second sensing hypothesis in the full set of the sensing occasions of the sensing resource set.

4 . The apparatus of claim 1 , wherein to transmit the first set of sensing measurement data and the second set of sensing measurement data, the at least one processor is configured to:

transmit the first set of sensing measurement data and the second set of sensing measurement data in a same transmission occasion; or

transmit the first set of sensing measurement data in a first transmission occasion and the second set of sensing measurement data in a second transmission occasion, wherein the first transmission occasion is different from the second transmission occasion.

5 . The apparatus of claim 4 , wherein the sensing configuration further indicates at least one of (i) a set of corresponding reference signals associated with each of the total number of sensing hypotheses or (ii) at least one of the same transmission occasion or the first transmission occasion and the second transmission occasion; and

wherein to transmit the first set of sensing measurement data and the second set of sensing measurement data in the same transmission occasion, the at least one processor is configured to transmit the first set of sensing measurement data and the second set of sensing measurement data in the same transmission occasion on a first reference signal of the set of corresponding reference signals, or

wherein to transmit the first set of sensing measurement data in the first transmission occasion and the second set of sensing measurement data in the second transmission occasion, the at least one processor is configured to transmit the first set of sensing measurement data in the first transmission occasion on the first reference signal of the set of corresponding reference signals and the second set of sensing measurement data in the second transmission occasion on a second reference signal of the set of corresponding reference signals, wherein the first reference signal is different from the second reference signal.

6 . The apparatus of claim 1 , wherein at least one of the first set of sensing measurement data or the second set of sensing measurement data is associated with at least one corresponding reference signal and at least one of a range, an angle, or a Doppler measurement.

7 . The apparatus of claim 1 , wherein at least one of the first set of sensing measurement data and the second set of sensing measurement data or the indication of the first sensing hypothesis and the second sensing hypothesis also includes information associated with at least one of a measurement characteristic, an outlier rejection, or a measurement efficacy for one or more of the first set of sensing measurement data associated with the first sensing hypothesis and the second set of sensing measurement data associated with the second sensing hypothesis.

8 . The apparatus of claim 7 , wherein the at least one processor is further configured to:

receive, from the sensing entity, an adjusted sensing configuration associated with the indication of the first sensing hypothesis and the second sensing hypothesis, wherein the adjusted sensing configuration indicates at least one of an adjusted total number of sensing hypotheses, an adjusted first sensing hypothesis, or an adjusted second sensing hypothesis;

measure a third set of sensing measurement data and a fourth set of sensing measurement data associated with least one of the adjusted total number of sensing hypotheses, the adjusted first sensing hypothesis, or the adjusted second sensing hypothesis; and

transmit, for the sensing entity, the third set of sensing measurement data and the fourth set of sensing measurement data.

9 . The apparatus of claim 1 , wherein to measure the first set of sensing measurement data associated with the first sensing hypothesis and the second set of sensing measurement data associated with the second sensing hypothesis, the at least one processor is configured to measure the first set of sensing measurement data associated with the first sensing hypothesis and the second set of sensing measurement data associated with the second sensing hypothesis in a sensing session that includes at least a full set of sensing occasions of a sensing resource set;

wherein the at least one processor is further configured to:

receive, from the sensing entity or from a network node and subsequent to reception of the sensing configuration, a hypothesis activation, wherein the hypothesis activation indicates at least one of the first sensing hypothesis or the second sensing hypothesis from the total number of sensing hypotheses for the measurement.

10 . The apparatus of claim 9 , wherein to receive the hypothesis activation, the at least one processor is configured to receive the hypothesis activation prior to the sensing session or receive the hypothesis activation during the sensing session and subsequent to a measurement over a prior instance of the sensing resource set.

11 . The apparatus of claim 9 , wherein the sensing entity is a location management function (LMF), wherein the hypothesis activation is associated with a coherency condition of the sensing node, and wherein to receive the hypothesis activation, the at least one processor is configured to receive the hypothesis activation from the network node via at least one of radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI).

12 . The apparatus of claim 9 , wherein the sensing node is a sidelink (SL) user equipment (UE), wherein the hypothesis activation is associated with a coherency condition of the sensing node, and wherein to receive the hypothesis activation, the at least one processor is configured to receive the hypothesis activation from the sensing entity via a sidelink channel by at least one of direct communication (PC5) radio resource control (RRC) signaling, a PC5 medium access control (MAC) control element (MAC-CE), SL control information (SCI) stage 1, or SCI stage 2.

13 . The apparatus of claim 1 , wherein to measure the first set of sensing measurement data associated with the first sensing hypothesis and the second set of sensing measurement data associated with the second sensing hypothesis, the at least one processor is configured to dynamically measure the first set of sensing measurement data associated with the first sensing hypothesis and the second set of sensing measurement data associated with the second sensing hypothesis based on an activation of the first sensing hypothesis and the second sensing hypothesis by the sensing node, wherein the activation is associated with at least one of a mobility event of the sensing node or a cell switch of the sensing node.

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

provide, to the sensing entity, a capability indication of the sensing node, wherein the capability indication of the sensing node indicates a capability of the sensing node associated with multiple hypothesis (multi-hypothesis) measurement and reporting including at least one of a number of sensing hypotheses supported by the sensing node, a buffer capability of the sensing node, a processing capability of the sensing node, or a related sensing capability of the sensing node.

15 . The apparatus of claim 14 , wherein the at least one processor is further configured to:

receive a capability request of the sensing node prior to providing the capability indication of the sensing node;

wherein to provide the capability indication of the sensing node, the at least one processor is configured to provide the capability indication of the sensing node in response to the capability request.

16 . A method of wireless communications at a sensing node, comprising:

receiving, from a sensing entity, a sensing configuration, the sensing configuration indicating a total number of sensing hypotheses and at least a first sensing hypothesis and a second sensing hypothesis that is different from the first sensing hypothesis;

measuring a first set of sensing measurement data associated with the first sensing hypothesis and a second set of sensing measurement data associated with the second sensing hypothesis; and

transmitting, for the sensing entity, at least one of: (1) the first set of sensing measurement data and the second set of sensing measurement data, or (2) an indication of the first sensing hypothesis and the second sensing hypothesis.