Handling of punctured positioning reference signals
Disclosed are various techniques for wireless communication. In an aspect, a user equipment (UE) measures, during a measurement period that spans multiple measurement opportunities, multiple positioning reference signal (PRS) instances, each PRS instance occupying a different measurement opportunity, to produce a plurality of positioning measurements. A PRS instance can be a PRS resource, a PRS resource set, a PRS frequency layer, a transmission/reception point, or combinations thereof. For each PRS instance measured, the UE determines whether the PRS instance was punctured. Upon a determination that the PRS instance was punctured, the UE discards at least a portion of the positioning measurement and modifies the measurement period, e.g., by restarting the measurement period or extending the measurement period in order to take a measurement of another PRS instance.
1 . A method of wireless communication performed by a user equipment (UE), the method comprising:
measuring, during a measurement period that spans a plurality of measurement opportunities, a plurality of PRS instances, each PRS instance occupying a different measurement opportunity, to produce a plurality of positioning measurements, each positioning measurement corresponding to one of the plurality of PRS instances; and
for each PRS instance measured in its corresponding measurement opportunity, upon a determination that the PRS instance was punctured, discarding at least a portion of the corresponding positioning measurement and modifying the measurement period.
2 . The method of claim 1 , further comprising:
for each PRS instance measured in its corresponding measurement opportunity, upon a determination that the PRS instance was not punctured, processing the corresponding positioning measurement.
3 . The method of claim 1 , wherein the plurality of measurement opportunities comprises a plurality of measurement gaps.
4 . The method of claim 1 , further comprising reporting processed positioning measurements to a network entity.
5 . The method of claim 1 , wherein the plurality of PRS instances comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or combinations thereof.
6 . The method of claim 1 , wherein determining whether the PRS instance was punctured comprises receiving a puncture indication from a network entity.
7 . The method of claim 6 , wherein receiving the puncture indication from the network entity comprises receiving the puncture indication from a base station or a location server.
8 . The method of claim 6 , wherein receiving the puncture indication comprises receiving the puncture indication via a medium access control (MAC) control element (CE) or via downlink control information (DCI) signaling.
9 . The method of claim 1 , wherein discarding the at least a portion of the corresponding positioning measurement comprises discarding a portion of the corresponding positioning measurement associated with punctured symbols or discarding all of the corresponding positioning measurement.
10 . The method of claim 1 , wherein modifying the measurement period comprises restarting or extending the measurement period.
11 . The method of claim 10 , wherein discarding at least a portion of the corresponding measurement comprises discarding positioning measurements that were processed prior to restarting the measurement period.
12 . The method of claim 6 , wherein measuring the plurality of PRS instances comprises measuring a first PRS instance on a first positioning frequency layer (PFL) occupying a first frequency band; and wherein receiving the puncture indication comprises receiving the puncture indication via a second frequency band different from the first frequency band.
13 . The method of claim 12 , wherein measuring the first PRS instance comprises measuring the first PRS instance during a measurement opportunity associated with the first PFL and wherein receiving the puncture indication comprises receiving the puncture indication during the measurement opportunity associated with the first PFL.
14 . The method of claim 12 , further comprising:
measuring, on a second PFL occupying the second frequency band and during a measurement opportunity associated with the second PFL, a second PRS instance, to produce a second positioning measurement;
receiving, via the first frequency band, an indication that the second PRS instance was punctured; and
discarding at least a portion of the second positioning measurement.
15 . A method of wireless communication performed by a base station, the method comprising:
detecting that a first PRS instance being transmitted on a first positioning frequency layer (PFL) occupying a first frequency band and during a measurement opportunity associated with the first PFL has been punctured; and
transmitting, via a second frequency band different from the first frequency band and during the measurement opportunity associated with the first PFL, an indication that the first PRS instance was punctured.
16 . The method of claim 15 , wherein the measurement opportunity associated with the first PFL comprises a measurement gap.
17 . The method of claim 15 , wherein the first PRS instance comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or combinations thereof.
18 . The method of claim 15 , wherein transmitting the indication that the first PRS instance was punctured comprises transmitting the indication via a medium access control (MAC) control element (CE) or via downlink control information (DCI) signaling.
19 . 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:
measure, during a measurement period that spans a plurality of measurement opportunities, a plurality of PRS instances, each PRS instance occupying a different measurement opportunity, to produce a plurality of positioning measurements, each positioning measurement corresponding to one of the plurality of PRS instances; and
for each PRS instance measured in its corresponding measurement opportunity, upon a determination that the PRS instance was punctured, discard at least a portion of the corresponding positioning measurement and modify the measurement period.
20 . The UE of claim 19 , wherein the at least one processor is further configured to:
for each PRS instance measured in its corresponding measurement opportunity, upon a determination that the PRS instance was not punctured, process the corresponding positioning measurement.
21 . The UE of claim 19 , wherein the plurality of measurement opportunities comprises a plurality of measurement gaps.
22 . The UE of claim 19 , wherein the at least one processor configured to determine whether the PRS instance was punctured comprises the at least one processor configured to receive a puncture indication from a network entity.
23 . The UE of claim 22 , wherein the at least one processor configured to receive the puncture indication comprises the at least one processor configured to receive the puncture indication via a medium access control (MAC) control element (CE) or via downlink control information (DCI) signaling.
24 . The UE of claim 19 , wherein the at least one processor configured to discard the at least a portion of the corresponding positioning measurement comprises the at least one processor configured to discard a portion of the corresponding positioning measurement associated with punctured symbols or to discard all of the corresponding positioning measurement.
25 . The UE of claim 19 , wherein the at least one processor configured to modify the measurement period comprises the at least one processor configured to restart or extend the measurement period.
26 . The UE of claim 22 ,
wherein, to measure the plurality of PRS instances, the at least one processor is configured to measure a first PRS instance on a first positioning frequency layer (PFL) occupying a first frequency band
and wherein, to receive the puncture indication, the at least one processor is configured to receive the punction indication via the at least one transceiver, via a second frequency band different from the first frequency band.
27 . The UE of claim 26 , wherein the at least one processor is further configured to:
measure, on a second PFL occupying the second frequency band and during a measurement opportunity associated with the second PFL, a second PRS instance, to produce a second positioning measurement;
receive, via the at least one transceiver, via the first frequency band, an indication that the second PRS instance was punctured; and
discard at least a portion of the second positioning measurement.
28 . A base station, 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:
detect that a first PRS instance being transmitted on a first positioning frequency layer (PFL) occupying a first frequency band and during a measurement opportunity associated with the first PFL has been punctured; and
transmit, via the at least one transceiver, via a second frequency band different from the first frequency band and during the measurement opportunity associated with the first PFL, an indication that the first PRS instance was punctured.
29 . The base station of claim 28 , wherein the first PRS instance comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or combinations thereof.
30 . The base station of claim 28 , wherein the at least one processor configured to transmit the indication that the first PRS instance was punctured comprises the at least one processor configured to transmit the indication via a medium access control (MAC) control element (CE) or via downlink control information (DCI) signaling.