Positioning method in wireless communication system, and device for supporting same

1. A method of performing a reference signal time difference (RSTD) measurement based on positioning reference signals (PRSs) by a user equipment (UE) in a wireless communication system, the method comprising:

receiving information related to a plurality of PRS resources;

performing at least one RSTD measurement based on the information related to the plurality of PRS resources; and

transmitting a report based on the at least one RSTD measurement,

wherein the information related to the plurality of PRS resources includes first reference information regarding a reference transmission point (TP) for the at least one RSTD measurement,

wherein, based on a first PRS resource being determined by the UE as a reference PRS resource for the at least one RSTD measurement after the first reference information is configured, the report is configured to include second reference information regarding the first PRS resource determined by the UE, and

wherein the plurality of PRS resources are associated with a plurality of beams of a TP.

2. The method of claim 1 ,

wherein the at least one RSTD measurement is related to an observed time difference of arrival (OTDOA).

3. The method of claim 1 ,

wherein the report includes:

information regarding at least one reference signal received power (RSRP) based on at least on second PRS resource among the plurality of PRS resources, and

at least one second PRS index related to the at least one second PRS resource.

4. The method of claim 3 ,

wherein, based on quality of the at least one RSTD measurement being less than or equal to a predetermined threshold, the report includes the information regarding the at least one RSRP and the at least one second PRS resource.

5. A user equipment (UE) configured to operate in in a wireless communication system, the UE comprising:

a transceiver; and

at least one processor coupled with the transceiver,

wherein the at least one processor is configured to:

receive information related to a plurality of positioning reference signals (PRS) resources;

perform at least one reference signal time difference (RSTD) measurement based on the information related to the plurality of PRS resources;

transmit a report based on the at least one RSTD measurement;

wherein the information related to the plurality of PRS resources includes first reference information regarding the reference transmission point (TP) for the at least one RSTD measurement,

wherein, based on the first PRS resource being determined by the UE as a reference PRS resource for the at least one RSTD measurement after the first reference information is configured, the report is configured to include second reference information regarding the first PRS resource determined by the UE, and

wherein the plurality of PRS resources are associated with a plurality of beams of a TP.

6. A method performed by a network node in a wireless communication system, the method comprising:

transmitting, to a user equipment (UE), information related to a plurality of positioning reference signal (PRS) resources; and

receiving a report regarding at least one reference signal time difference (RSTD) measurement based on the information related to the plurality of PRS resource,

wherein the information related to the plurality of PRS resources includes first reference information regarding a reference transmission point (TP) for the at least one RSTD measurement,

wherein, based on the report including second reference information regarding a first PRS resource, the network node is configured to determine that the first PRS resource has been determined by the UE as a reference PRS resource for the at least one RSTD measurement after the first reference information is configured, and

wherein the plurality of PRS resources are associated with a plurality of beams of a TP.

7. A network node configured to operate in a wireless communication system, the network node comprising:

a transceiver; and

at least one processor configured to control the transceiver,

wherein the at least one processor is configured to:

transmit, to a user equipment (UE), information related to a plurality of positioning reference signal (PRS) resources;

receive a report regarding at least one reference signal time difference (RSTD) measurement based on the information related to the plurality of PRS resources,

wherein the information related to the plurality of PRS resources includes first reference information regarding a reference transmission point (TP) for the at least one RSTD measurement,

wherein, based on the report including second reference information regarding a first PRS resource, the at least one processor is configured to determine that the first PRS resource has been determined by the UE as a reference PRS resource for the at least one RSTD measurement after the first reference information is configured, and

wherein the plurality of PRS resources are associated with a plurality of beams of a TP.