Positioning measurement derivation based on a decoded physical downlink channel and corresponding measurement latency

1 . A method of wireless communication performed by a user equipment (UE), comprising:

receiving a demodulation reference signal (DMRS) and a physical downlink shared channel (PDSCH) associated with the DMRS, the DMRS and the PDSCH spanning a plurality of symbols of a slot;

decoding the PDSCH;

performing a positioning measurement based on the DMRS and the decoded PDSCH;

reporting, to a location server, the positioning measurement or location information derived at least based on the positioning measurement;

performing a positioning measurement at least based on the DMRS before performing the positioning measurement based on the DMRS and the decoded PDSCH; and

reporting the positioning measurement at least based on the DMRS or location information derived at least based on the positioning measurement at least based on the DMRS before reporting the positioning measurement based on the DMRS and the decoded PDSCH or the location information derived at least based on the positioning measurement based on the DMRS and the decoded PDSCH.

2 . The method of claim 1 , wherein the positioning measurement is performed based on a configuration to perform a positioning measurement of at least the DMRS.

3 . The method of claim 2 , wherein:

the configuration is received from the location server,

the configuration is received from a serving base station, or

the configuration is specified in a wireless communications standard.

4 . The method of claim 1 , wherein a measurement reporting latency for the positioning measurement or the location information derived at least based on the positioning measurement is defined as:

an amount of time after an acknowledgment for the decoded PDSCH is transmitted;

an amount of time after the PDSCH is received, an amount of time after a physical downlink control channel (PDCCH) that scheduled the PDSCH is received,

an amount of time after a last retransmission of the PDSCH, or

any combination thereof.

5 . The method of claim 4 , wherein:

the amount of time after the acknowledgment for the decoded PDSCH is transmitted comprises K symbols or slots,

the amount of time after the PDSCH is received comprises K plus N symbols or slots after the PDSCH is received, where N is a reported PDSCH preparation time,

the amount of time after the PDCCH that scheduled the PDSCH is received comprises K symbols or slots, and

the amount of time after the last retransmission of the PDSCH comprises K symbols or slots after the last retransmission of the PDSCH.

6 . The method of claim 5 , wherein K is received from a location server, received from a serving base station, based on UE capability, or specified in a wireless communications standard.

7 . The method of claim 1 , wherein a measurement reporting latency for the positioning measurement or the location information derived at least based on the positioning measurement is defined based on UE capability.

8 . The method of claim 1 , wherein the positioning measurement at least based on the DMRS and the positioning measurement based on the DMRS and the decoded PDSCH are reported via low layer signaling.

9 . The method of claim 8 , wherein the low layer signaling comprises physical layer signaling or medium access control (MAC) signaling.

10 . The method of claim 9 , wherein:

the physical layer signaling comprises uplink control information (UCI), and the MAC signaling comprises MAC control elements (MAC-CEs).

11 . The method of claim 1 , wherein the positioning measurement based on the DMRS and the decoded PDSCH is reported as a relative value compared to the positioning measurement at least based on the DMRS.

12 . The method of claim 1 , wherein the positioning measurement based on the DMRS and the decoded PDSCH is more accurate than the positioning measurement at least based on the DMRS.

13 . The method of claim 1 , wherein the DMRS and the PDSCH are scheduled with a wideband precoding resource block group (PRG).

14 . The method of claim 1 , wherein the PDSCH comprises:

a semi-persistent, or configured grant, PDSCH,

a PDSCH with a consecutive allocation in a frequency domain,

a PDSCH with an allocation in the frequency domain larger than a threshold, or

a PDSCH that has virtual resource block-to-physical resource block (VRB-PRB) mapping disabled.

15 . The method of claim 1 , wherein an accuracy requirement of the positioning measurement is the same as an accuracy requirement for a positioning measurement of the DMRS.

16 . The method of claim 1 , wherein an accuracy requirement of the positioning measurement is different than an accuracy requirement for a positioning measurement of the DMRS.

17 . The method of claim 1 , wherein:

the PDSCH comprises a plurality of code blocks,

decoding the PDSCH comprises decoding a subset of the plurality of code blocks before decoding remaining code blocks of the plurality of code blocks,

performing the positioning measurement comprises performing the positioning measurement of the subset of the plurality of code blocks before performing the positioning measurement of the remaining code blocks of the plurality of code blocks, and

reporting the positioning measurement comprises reporting the positioning measurement of the subset of the plurality of code blocks before reporting the positioning measurement of the remaining code blocks of the plurality of code blocks.

18 . The method of claim 17 , further comprising:

decoding the remaining code blocks of the plurality of code blocks,

performing the positioning measurement of the remaining code blocks of the plurality of code blocks, and

reporting the positioning measurement of the remaining code blocks of the plurality of code blocks.

19 . The method of claim 18 , wherein the positioning measurement of the remaining code blocks of the plurality of code blocks is reported as a relative value compared to the positioning measurement of the subset of the plurality of code blocks.

20 . The method of claim 1 , wherein the positioning measurement comprises a time of arrival (ToA) measurement, a reference signal time difference (RSTD) measurement, or a reception-to-transmission (Rx-Tx) measurement, or a reference signal received power (RSRP) measurement, or a multi-path reporting measurement.

21 . The method of claim 1 , wherein the location information comprises a location estimate of the UE, a distance between the UE and a transmission-reception point (TRP) from which the DMRS and PDSCH are received, or any combination thereof.

22 . A user equipment (UE), comprising:

a memory;

at least one transceiver; and

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

receive, via the at least one transceiver, a demodulation reference signal (DMRS) and a physical downlink shared channel (PDSCH) associated with the DMRS, the DMRS and the PDSCH spanning a plurality of symbols of a slot;

decode the PDSCH;

perform a positioning measurement based on the DMRS and the decoded PDSCH;

report, to a location server, the positioning measurement or location information derived at least based on the positioning measurement;

perform a positioning measurement at least based on the DMRS before performing the positioning measurement based on the DMRS and the decoded PDSCH; and

report the positioning measurement at least based on the DMRS or location information derived at least based on the positioning measurement at least based on the DMRS before reporting the positioning measurement based on the DMRS and the decoded PDSCH or the location information derived at least based on the positioning measurement based on the DMRS and the decoded PDSCH.

23 . The UE of claim 22 , wherein the positioning measurement is performed based on a configuration to perform a positioning measurement of at least the DMRS.

24 . The UE of claim 22 , wherein a measurement reporting latency for the positioning measurement or the location information derived at least based on the positioning measurement is defined as:

an amount of time after an acknowledgment for the decoded PDSCH is transmitted;

an amount of time after the PDSCH is received,

an amount of time after a physical downlink control channel (PDCCH) that scheduled the PDSCH is received,

an amount of time after a last retransmission of the PDSCH, or any combination thereof.

25 . The UE of claim 22 , wherein the DMRS and the PDSCH are scheduled with a wideband precoding resource block group (PRG).

26 . The UE of claim 22 , wherein an accuracy requirement of the positioning measurement is the same as an accuracy requirement for a positioning measurement of the DMRS.

27 . A user equipment (UE), comprising:

means for receiving a demodulation reference signal (DMRS) and a physical downlink shared channel (PDSCH) associated with the DMRS, the DMRS and the PDSCH spanning a plurality of symbols of a slot;

means for decoding the PDSCH;

means for performing a positioning measurement based on the DMRS and the decoded PDSCH;

means for reporting, to a location server, the positioning measurement or location information derived at least based on the positioning measurement;

means for performing a positioning measurement at least based on the DMRS before performing the positioning measurement based on the DMRS and the decoded PDSCH; and

means for reporting the positioning measurement at least based on the DMRS or location information derived at least based on the positioning measurement at least based on the DMRS before reporting the positioning measurement based on the DMRS and the decoded PDSCH or the location information derived at least based on the positioning measurement based on the DMRS and the decoded PDSCH.

28 . A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a user equipment (UE), cause the UE to:

receive a demodulation reference signal (DMRS) and a physical downlink shared channel (PDSCH) associated with the DMRS, the DMRS and the PDSCH spanning a plurality of symbols of a slot;

decode the PDSCH;

perform a positioning measurement based on the DMRS and the decoded PDSCH;

report, to a location server, the positioning measurement or location information derived at least based on the positioning measurement;

perform a positioning measurement at least based on the DMRS before performing the positioning measurement based on the DMRS and the decoded PDSCH; and

report the positioning measurement at least based on the DMRS or location information derived at least based on the positioning measurement at least based on the DMRS before reporting the positioning measurement based on the DMRS and the decoded PDSCH or the location information derived at least based on the positioning measurement based on the DMRS and the decoded PDSCH.