Method for reporting measurement result for determining position in wireless communication system, and device therefor
A method for reporting a measurement result for determining a position in a wireless communication system, according to one embodiment of the present invention, is performed by a terminal and may comprise the steps of: receiving positioning reference signal (PRS)-related information comprising a position identifier of each of a plurality of base stations; performing a measurement on the PRSs transmitted by each of the plurality of base stations; if the position identifier of each of the plurality of base stations are identical to each other, selecting at least one measurement result among the measurement results for the PRSs; and reporting the selected measurement result to a serving base station.
1. A method for reporting a measurement result for position determination in a wireless communication system, the method performed by a terminal and comprising:
measuring, by the terminal, an RSTD value for at least one positioning reference signal (PRS) transmitted from one or more base stations; and
reporting, by the terminal and to a network, a reference signal time difference (RSTD) report value which corresponds to the measured RSTD value and a range to which the measured RSTD value belongs, using a plurality of predefined RSTD mapping tables,
wherein the reported range is smaller than 1 Ts, wherein Ts is 1/30720 ms.
2. The method of claim 1 , further comprising reporting, to the network, a capability of the UE related to the plurality of the RSTD mapping tables.
3. The method of claim 1 , wherein if accuracy or quality of the RSTD value is equal to or smaller than a specific value or if uncertainty of the RSTD value is equal to or greater than a specific value, aperiodic PRS transmission by the one or more base stations is triggered.
4. The method of claim 3 , wherein a specific time interval in which the aperiodic PRS is transmitted is indicated through a higher layer signal.
5. The method of claim 4 , further comprising performing blind detection of an aperiodic PRS in the specific time interval.
6. The method of claim 3 , wherein a specific subframe in which the aperiodic PRS is transmitted is indicated through a higher layer signal.
7. The method of claim 1 , further comprising transmitting a request for an aperiodic PRS transmission to the one or more base stations.
8. A terminal reporting a measurement result for position determination in a wireless communication system, comprising:
a receiver;
a transmitter; and
a processor that controls the receiver and the transmitter;
wherein the processor measures an RSTD value for at least one positioning reference signal (PRS) transmitted from one or more base stations, and reports, to a network, a reference signal time difference (RSTD) report value which corresponds to the measured RSTD value and a range to which the measured RSTD value belongs, using a plurality of predefined RSTD mapping tables, and
wherein the reported range is smaller than 1 Ts, wherein Ts is 1/30720 ms.
9. The terminal of claim 8 , further comprising reporting, to the network, a capability of the UE related to the plurality of the RSTD mapping tables.
10. The terminal of claim 8 , wherein if accuracy or quality of the RSTD value is equal to or smaller than a specific value or if uncertainty of the RSTD value is equal to or greater than a specific value, aperiodic PRS transmission by the one or more base stations is triggered.
11. The terminal of claim 10 , wherein a specific time interval in which the aperiodic PRS is transmitted is indicated through a higher layer signal.
12. The terminal of claim 11 , further comprising performing blind detection of an aperiodic PRS in the specific time interval.
13. The terminal of claim 10 , wherein a specific subframe in which the aperiodic PRS is transmitted is indicated through a higher layer signal.
14. The terminal of claim 8 , wherein the processor transmits a request for an aperiodic PRS transmission to the one or more base stations.