Positioning method in wireless communication system, and device therefor
The present disclosure relates to a terminal-based positioning method and device and, the terminal-based positioning method performed by a terminal in a wireless communication system, according to one aspect, can comprise the steps of: measuring a time difference of arrival (TDoA) for each distributed antenna on the basis of signals received from an anchor node through a plurality of distributed antennas; setting the relative position for each distributed antenna on the basis of a reference point preset in correspondence with the terminal; and determining an absolute position, which is the position of the reference point, on the basis of the TDoA measured for each distributed antenna and the relative position set for each distributed antenna.
1. A user equipment (UE)-based positioning method by a UE in a wireless communication system, the method comprising:
measuring a time difference of arrival (TDoA) for each distributed antenna based on a signal received through a plurality of distributed antennas from an anchor node (AN);
configuring a relative position for each of the distributed antennas based on a preconfigured reference point related with the UE; and
determining an absolute position as a position of the reference point based on the TDoA measured for each of the distributed antennas and the relative position configured for each of the distributed antennas by applying a least-square (LS) positioning algorithm,
wherein the LS positioning algorithm includes at least one of:
a first LS positioning algorithm for determining the absolute position by applying a weight average to a position of the reference point measured for each of the distributed antennas; or
a second LS positioning algorithm for determining the absolute position by combining all the TDoAs measured for the respective distributed antennas.
2. The method of claim 1 , wherein the weight is determined based on at least one of a positioning quality indicator (PQI) of a position of the anchor node, quality of a signal received from the anchor node for each of the distributed antennas, a number of the anchor nodes observed for each of the distributed antennas, or a topology of the anchor node observed for each of the distributed antennas.
3. The method of claim 1 , wherein the TDoA for each of the distributed antennas is measured based on a single reference anchor node or a multi-reference anchor node.
4. The method of claim 1 , wherein the TDoA is measured based on a time of arrival (ToA) for a positioning reference signal (PRS) received from a neighboring anchor node for each of the distributed antennas.
5. The method of claim 1 , wherein reference anchor nodes for the respective distributed antennas are identical or different.
6. The method of claim 1 , wherein the UE is mounted in the vehicle, and the reference point is configured as a middle of the vehicle or a center point of a front bumper of the vehicle.
7. An apparatus for performing user equipment (UE)-based positioning in a wireless communication, the apparatus comprising:
a radio frequency (RF) transceiver including a plurality of distributed antennas; and
a processor connected to the RF transceiver,
wherein the processor measures a time difference of arrival (TDoA) for each distributed antenna based on a signal received through a plurality of distributed antennas from an anchor node (AN), configures a relative position for each of the distributed antennas based on a preconfigured reference point related with the apparatus, and determines an absolute position as a position of the reference point based on the TDoA measured for each of the distributed antennas and the relative position configured for each of the distributed antennas by applying a least-square (LS) positioning algorithm,
wherein the LS positioning algorithm includes at least one of:
a first LS positioning algorithm for determining the absolute position by applying a weight average to a position of the reference point measured for each of the distributed antennas; or
a second LS positioning algorithm for determining the absolute position by combining all the TDoAs measured for the respective distributed antennas.
8. The apparatus of claim 7 , wherein the weight is determined based on at least one of a positioning quality indicator (PQI) of a position of the anchor node, quality of a signal received from the anchor node for each of the distributed antennas, a number of the anchor nodes observed for each of the distributed antennas, or a topology of the anchor node observed for each of the distributed antennas.
9. The apparatus of claim 7 , wherein the TDoA for each of the distributed antennas is measured based on a single reference anchor node or a multi-reference anchor node.
10. The apparatus of claim 7 , wherein the TDoA is measured based on a time of arrival (ToA) for a positioning reference signal (PRS) received from a neighboring anchor node for each of the distributed antennas.
11. The apparatus of claim 7 , wherein reference anchor nodes for the respective distributed antennas are identical or different.