Reference signal time difference (RSTD) measurement report enhancements for multi-timing error group (TEG) requests
Disclosed are techniques for wireless positioning. In an aspect, a first network node receives a measurement request from a location server, the measurement request requesting the first network node to measure a positioning reference signal (PRS) resource from at least one second network node using a plurality of receive timing error groups (Rx TEGs) of the first network node, and transmits a measurement report to the location server, the measurement report including a plurality of positioning measurements based on the PRS resource, the plurality of positioning measurements corresponding to the plurality of Rx TEGs.
1. A method of wireless positioning performed by a first network node, comprising:
receiving a measurement request from a location server, the measurement request requesting the first network node to measure a positioning reference signal (PRS) resource from at least one second network node using a plurality of receive timing error groups (Rx TEGs) of the first network node; and
transmitting at least one measurement report to the location server, the at least one measurement report including a plurality of positioning measurements based on the PRS resource, the plurality of positioning measurements corresponding to the plurality of Rx TEGs.
2. The method of claim 1 , wherein the measurement request includes a list of identifiers of the plurality of Rx TEGs, a requested number of the plurality of Rx TEGs, or both.
3. The method of claim 1 , further comprising:
transmitting, before reception of the measurement request, a capability message to the location server, the capability message including a list of identifiers of the plurality of Rx TEGs, a number of the plurality of Rx TEGs, or both.
4. The method of claim 1 , wherein:
the first network node is a user equipment (UE),
the plurality of positioning measurements is a plurality of reference signal time difference (RSTD) measurements,
the at least one second network node is a neighbor transmission-reception point (TRP), and
each RSTD measurement of the plurality of RSTD measurements is associated in the at least one measurement report with one Rx TEG of the plurality of Rx TEGs.
5. The method of claim 1 , wherein:
the first network node is a UE,
the plurality of positioning measurements is a plurality of RSTD measurements, and
the at least one second network node is a reference TRP.
6. The method of claim 5 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each Rx TEG of the plurality of Rx TEGs for each pair of the reference TRP and a neighbor TRP.
7. The method of claim 5 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the plurality of RSTD measurements further comprises a plurality of additional RSTD measurements for one pair of the reference TRP and one neighbor TRP, and
each additional RSTD measurement of the plurality of RSTD measurements is associated with one of the plurality of Rx TEGs, other than the reference Rx TEG.
8. The method of claim 7 , wherein the at least one measurement report includes:
a measurement list of the plurality of additional RSTD measurements,
a first Rx TEG for a neighbor TRP and a second Rx TEG for the reference TRP,
an Rx TEG identifier for each of the additional RSTD measurements, or
any combination thereof.
9. The method of claim 5 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the at least one measurement report further includes a plurality of delta values for the plurality of Rx TEGs for the reference TRP, and
the plurality of delta values represents timing differences caused by the plurality of Rx TEGs.
10. The method of claim 5 , wherein:
the plurality of RSTD measurements consists of an RSTD measurement for each of the plurality of Rx TEGs, other than a reference Rx TEG associated with the reference TRP, based on reuse of time-of-arrival (ToA) measurements of neighbor TRPs from a previous occasion, less than a threshold amount of movement, or both.
11. The method of claim 5 , wherein:
the at least one measurement report comprises a plurality of measurement reports,
each of the plurality of measurement reports includes one RSTD measurement of the plurality of RSTD measurements,
one measurement report of the plurality of measurement reports includes an RSTD measurement equal to 0 to indicate a default reference Rx TEG and the reference TRP, and
remaining measurement reports of the plurality of measurement reports include an Rx TEG identifier field indicating a different Rx TEG than the default reference Rx TEG.
12. The method of claim 1 , wherein:
the first network node is a UE,
the plurality of positioning measurements is a plurality of RSTD measurements,
the at least one second network node comprises a plurality of neighbor TRPs, and
the plurality of RSTD measurements comprises an RSTD measurement for each of the plurality of neighbor TRPs for each of the plurality of Rx TEGs.
13. The method of claim 1 , wherein:
the first network node is a UE,
the plurality of positioning measurements is a plurality of RSTD measurements, and
the at least one second network node comprises a reference TRP and at least one neighbor TRP.
14. The method of claim 13 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each Rx TEG of the plurality of Rx TEGs for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP, and
the plurality of RSTD measurements further comprises an RSTD measurement for each of the plurality of Rx TEGs for a pair of the reference TRP and the at least one neighbor TRP.
15. The method of claim 13 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the plurality of RSTD measurements further comprises a first plurality of additional RSTD measurements for one pair of the reference TRP and one neighbor TRP,
the plurality of RSTD measurements further comprises a second plurality of additional RSTD measurements for one pair of the reference TRP and the at least one neighbor TRP, and
each additional RSTD measurement of the first plurality of RSTD measurements and the second plurality of RSTD measurements is associated with one of the plurality of Rx TEGs, other than the reference Rx TEG.
16. The method of claim 13 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the at least one measurement report further includes a first plurality of delta values for the plurality of Rx TEGs for the reference TRP,
the at least one measurement report further includes a second plurality of delta values for the plurality of Rx TEGs for the at least one neighbor TRP, and
the first plurality of delta values and the second plurality of delta values represent timing differences caused by the plurality of Rx TEGs.
17. The method of claim 1 , wherein:
the first network node is a TRP,
the at least one second network node is a UE,
the plurality of positioning measurements is a plurality of relative time of arrival (RTOA) measurements, and
the PRS resource is a sounding reference signal (SRS) resource.
18. A first network node, 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 measurement request from a location server, the measurement request requesting the first network node to measure a positioning reference signal (PRS) resource from at least one second network node using a plurality of receive timing error groups (Rx TEGs) of the first network node; and
transmit, via the at least one transceiver, at least one measurement report to the location server, the at least one measurement report including a plurality of positioning measurements based on the PRS resource, the plurality of positioning measurements corresponding to the plurality of Rx TEGs.
19. The first network node of claim 18 , wherein:
the first network node is a user equipment (UE),
the plurality of positioning measurements is a plurality of reference signal time difference (RSTD) measurements,
the at least one second network node is a neighbor transmission-reception point (TRP), and
each RSTD measurement of the plurality of RSTD measurements is associated in the at least one measurement report with one Rx TEG of the plurality of Rx TEGs.
20. The first network node of claim 18 , wherein:
the first network node is a UE,
the plurality of positioning measurements is a plurality of RSTD measurements, and
the at least one second network node is a reference TRP.
21. The first network node of claim 20 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each Rx TEG of the plurality of Rx TEGs for each pair of the reference TRP and a neighbor TRP.
22. The first network node of claim 20 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the plurality of RSTD measurements further comprises a plurality of additional RSTD measurements for one pair of the reference TRP and one neighbor TRP, and
each additional RSTD measurement of the plurality of RSTD measurements is associated with one of the plurality of Rx TEGs, other than the reference Rx TEG.
23. The first network node of claim 20 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the at least one measurement report further includes a plurality of delta values for the plurality of Rx TEGs for the reference TRP, and
the plurality of delta values represents timing differences caused by the plurality of Rx TEGs.
24. The first network node of claim 18 , wherein:
the first network node is a UE,
the plurality of positioning measurements is a plurality of RSTD measurements,
the at least one second network node comprises a plurality of neighbor TRPs, and
the plurality of RSTD measurements comprises an RSTD measurement for each of the plurality of neighbor TRPs for each of the plurality of Rx TEGs.
25. The first network node of claim 18 , wherein:
the first network node is a UE,
the plurality of positioning measurements is a plurality of RSTD measurements, and
the at least one second network node comprises a reference TRP and at least one neighbor TRP.
26. The first network node of claim 25 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each Rx TEG of the plurality of Rx TEGs for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP, and
the plurality of RSTD measurements further comprises an RSTD measurement for each of the plurality of Rx TEGs for a pair of the reference TRP and the at least one neighbor TRP.
27. The first network node of claim 25 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the plurality of RSTD measurements further comprises a first plurality of additional RSTD measurements for one pair of the reference TRP and one neighbor TRP,
the plurality of RSTD measurements further comprises a second plurality of additional RSTD measurements for one pair of the reference TRP and the at least one neighbor TRP, and
each additional RSTD measurement of the first plurality of RSTD measurements and the second plurality of RSTD measurements is associated with one of the plurality of Rx TEGs, other than the reference Rx TEG.
28. The first network node of claim 25 , wherein:
the plurality of RSTD measurements comprises an RSTD measurement for each pair of the reference TRP and a neighbor TRP using a reference Rx TEG associated with the reference TRP,
the at least one measurement report further includes a first plurality of delta values for the plurality of Rx TEGs for the reference TRP,
the at least one measurement report further includes a second plurality of delta values for the plurality of Rx TEGs for the at least one neighbor TRP, and
the first plurality of delta values and the second plurality of delta values represent timing differences caused by the plurality of Rx TEGs.
29. A first network node, comprising:
means for receiving a measurement request from a location server, the measurement request requesting the first network node to measure a positioning reference signal (PRS) resource from at least one second network node using a plurality of receive timing error groups (Rx TEGs) of the first network node; and
means for transmitting at least one measurement report to the location server, the at least one measurement report including a plurality of positioning measurements based on the PRS resource, the plurality of positioning measurements corresponding to the plurality of Rx TEGs.
30. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a first network node, cause the first network node to:
receive a measurement request from a location server, the measurement request requesting the first network node to measure a positioning reference signal (PRS) resource from at least one second network node using a plurality of receive timing error groups (Rx TEGs) of the first network node; and
transmit at least one measurement report to the location server, the at least one measurement report including a plurality of positioning measurements based on the PRS resource, the plurality of positioning measurements corresponding to the plurality of Rx TEGs.