Reporting granularity and measurement period for positioning reference signal (PRS) measurements
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) receives, from a network entity, a configuration of one or more positioning reference signal (PRS) resources to measure during a positioning session, the one or more PRS resources having a PRS periodicity T PRS and a PRS occasion length L PRS , and measures the one or more PRS resources during a measurement period, wherein the measurement period is based on a number of measurement instances of the one or more PRS resources the UE is expected to process multiplied by a periodicity parameter, wherein the periodicity parameter is based on a PRS processing window of ‘T’ milliseconds, the PRS periodicity T PRS , and a measurement gap periodicity of at least one measurement gap.
1. A method of wireless positioning performed by a user equipment (UE), comprising:
receiving, from a network entity, a configuration of one or more positioning reference signal (PRS) resources to measure during a positioning session, the one or more PRS resources having a PRS periodicity T PRS and a PRS occasion length L PRS ; and
measuring the one or more PRS resources during a measurement period, wherein the measurement period is based on a number of measurement instances of the one or more PRS resources the UE is expected to process multiplied by a periodicity parameter, wherein the periodicity parameter is based on a PRS processing window of ‘T’ milliseconds, the PRS periodicity T PRS , and a measurement gap periodicity of at least one measurement gap, and wherein ‘T’ milliseconds is a number of milliseconds during which the UE can process a duration ‘N’ of PRS symbols in milliseconds given a maximum PRS bandwidth.
2. The method of claim 1 , wherein the periodicity parameter is a maximum of the PRS processing window, the PRS periodicity T PRS , and the measurement gap periodicity.
3. The method of claim 1 , wherein the periodicity parameter is no less than a maximum of the PRS processing window, the PRS periodicity T PRS , and the measurement gap periodicity.
4. The method of claim 1 , wherein the number of measurement instances is based on the PRS occasion length L PRS .
5. The method of claim 4 , wherein:
the PRS occasion length L PRS is based on whether a Type 1 duration calculation or a Type 2 duration calculation is used to determine a duration of PRS symbols in milliseconds within any PRS processing window,
the Type 1 duration calculation is based on a sum of PRS symbol occupancy within each slot of a set of slots that are expected to contain PRS resources, and
the Type 2 duration calculation is based on a numerology of the one or more PRS resources and the set of slots that are expected to contain PRS resources.
6. The method of claim 1 , wherein the PRS occasion length L PRS is a time from a first symbol of a first PRS resource of a PRS occasion to a last symbol of a last PRS resource of the PRS occasion.
7. The method of claim 1 , wherein the PRS periodicity T PRS is a time from a first repetition of a first PRS resource of a first PRS occasion to the first repetition of the first PRS resource of a next PRS occasion.
8. The method of claim 1 , wherein:
the measurement period is a reference signal time difference (RSTD) measurement period, and
the one or more PRS resources are transmitted by a reference transmission-reception point (TRP) and at least one neighbor TRP.
9. The method of claim 1 , wherein the measurement period is a reception-to-transmission (Rx-Tx) time difference measurement period.
10. 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, from a network entity, a configuration of one or more positioning reference signal (PRS) resources to measure during a positioning session, the one or more PRS resources having a PRS periodicity T PRS and a PRS occasion length L PRS ; and
measure the one or more PRS resources during a measurement period, wherein the measurement period is based on a number of measurement instances of the one or more PRS resources the UE is expected to process multiplied by a periodicity parameter, wherein the periodicity parameter is based on a PRS processing window of ‘T’ milliseconds, the PRS periodicity T PRS , and a measurement gap periodicity of at least one measurement gap, and wherein ‘T’ milliseconds is a number of milliseconds during which the UE can process a duration ‘N’ of PRS symbols in milliseconds given a maximum PRS bandwidth.
11. The UE of claim 10 , wherein the periodicity parameter is a maximum of the PRS processing window, the PRS periodicity T PRS , and the measurement gap periodicity.
12. The UE of claim 10 , wherein the periodicity parameter is no less than a maximum of the PRS processing window, the PRS periodicity T PRS , and the measurement gap periodicity.
13. The UE of claim 10 , wherein the number of measurement instances is based on the PRS occasion length L PRS .
14. The UE of claim 13 , wherein:
the PRS occasion length L PRS is based on whether a Type 1 duration calculation or a Type 2 duration calculation is used to determine a duration of PRS symbols in milliseconds within any PRS processing window,
the Type 1 duration calculation is based on a sum of PRS symbol occupancy within each slot of a set of slots that are expected to contain PRS resources, and
the Type 2 duration calculation is based on a numerology of the one or more PRS resources and the set of slots that are expected to contain PRS resources.
15. The UE of claim 10 , wherein the PRS occasion length L PRS is a time from a first symbol of a first PRS resource of a PRS occasion to a last symbol of a last PRS resource of the PRS occasion.
16. The UE of claim 10 , wherein the PRS periodicity T PRS is a time from a first repetition of a first PRS resource of a first PRS occasion to the first repetition of the first PRS resource of a next PRS occasion.
17. The UE of claim 10 , wherein:
the measurement period is a reference signal time difference (RSTD) measurement period, and
the one or more PRS resources are transmitted by a reference transmission-reception point (TRP) and at least one neighbor TRP.
18. The UE of claim 10 , wherein the measurement period is a reception-to-transmission (Rx-Tx) time difference measurement period.