Methods for positioning of a wireless device, a related wireless device and a related network node
A method is disclosed, performed by a first wireless node, such as a wireless device, for enabling positioning of the wireless device. The method comprises providing, to a network node, a measurement report comprising a positioning measurement based on one or more reference signals transmitted from one or more second wireless nodes, such as base stations. The measurement report comprises an indication as to whether the positioning measurement is performed on a Line of Sight, LoS, component of the one or more reference signals.
1. A method, performed by a first wireless node, for enabling positioning of a wireless device, the method comprising:
providing, to a network node, a measurement report comprising a positioning measurement based on one or more reference signals transmitted from one or more second wireless nodes, wherein the measurement report comprises an indication as to whether the positioning measurement is performed on a Line of Sight (LoS) component of the one or more reference signals, and
wherein the measurement report comprises an indication of a quality of a determination whether the positioning measurement is performed on the LoS component of the reference signal.
2. The method according to claim 1 , wherein the method comprises:
performing positioning measurements on one or more reference signals received from the one or more second wireless nodes.
3. The method according to claim 2 , wherein the positioning measurement comprises a Time of Arrival (ToA) and/or a Reference Signal Receive Power (RSRP) measurement.
4. The method according to claim 1 , wherein the method comprises:
determining whether the positioning measurement is performed on a LoS component of the reference signal.
5. The method according to claim 4 , wherein the determining is based on an analysis of one or more statistical properties of a channel over which the reference signal is transmitted, such as whether one or more channel properties of the received reference signals are consistent with a propagation of a LoS component or a non-LoS (NLoS) component.
6. The method according to claim 4 , wherein the determining comprises:
determining whether a polarization of the received reference signal is different from a polarization of the reference signal transmitted by a corresponding second wireless node;
when it is determined that the polarization of the received reference signal is different from the polarization of the reference signal transmitted by the corresponding second wireless node, determining that the measured reference signal is not a LoS component;
when it is determined that the polarization of the received reference signal is not different from the polarization of the reference signal transmitted by the corresponding second wireless node, determining that the measured reference signal is a LoS component.
7. The method according to claim 1 , wherein the method further comprises:
estimating the quality of the determination whether the positioning measurement is performed on the LoS component of the reference signal.
8. The method according to claim 4 , wherein the method further comprises:
selecting one or more positioning measurements to report, based on the determination of whether the positioning measurement is performed on a LoS component of the reference signal, by prioritizing the reporting of a positioning measurement based on a LoS component over a positioning measurement based on a Non-Line of Sight (NLoS) component.
9. The method according to claim 8 , wherein the measurement report comprises an indication of a quality of a determination whether the positioning measurement is performed on the LoS component of the reference signal and wherein selecting comprises:
selecting the one or more positioning measurements based on the quality of the determination whether the positioning measurement is performed on the LoS component of the reference signal, by prioritizing the reporting of a positioning measurement based on a higher-quality determination of a first LoS component over a positioning measurement based on a lower-quality determination of a second LoS component, wherein the quality of the higher-quality determination of the first LoS component is higher than the quality of the lower-quality determination of the second LoS component.
10. The method according to claim 8 , wherein selecting comprises selecting the one or more positioning measurements to report based on a signal strength of the measured reference signal.
11. The method according to claim 1 , wherein the method comprises:
obtaining, from the network node, assistance information for assisting the wireless device in determining whether the received one or more reference signals are received as a LoS component.
12. The method according to claim 11 , wherein the assistance information comprises a transmission configuration of the one or more second wireless nodes, wherein the transmission configuration comprises a polarization of the reference signals transmitted from the one or more second wireless nodes.
13. The method according to claim 1 , wherein the method further comprises:
selecting a reference cell, wherein the measurement report indicates a time difference of the measured reference signal in relation to the reference signal received from the reference cell.
14. The method according to claim 13 , wherein the reference cell is selected based on the determination of whether the positioning measurement is performed on a LoS component of the reference signal, by selecting a cell corresponding to a positioning measurement performed over a LoS component over a cell corresponding to a NLoS component; and/or based on a quality of the determination whether the positioning measurement is performed on the LoS component of the reference signal, by selecting a cell corresponding to a positioning measurement having a higher-quality determination of a first LoS component over a positioning measurement having a lower-quality determination of a second LoS component.
15. The method according to claim 1 , wherein the method further comprises:
signalling to the network node that the first wireless node supports determining whether a reference signal is a LoS component.
16. The method according to claim 1 , wherein the method further comprises:
receiving, from the network node, a request to provide the indication as to whether the positioning measurement is performed on a LoS component of the reference signal in the measurement report.
17. The method according to claim 1 , wherein the first wireless node is a wireless device, and the second wireless node is a base station.
18. The method according to claim 1 , wherein the first wireless node is a base station, and the second wireless node is a wireless device.
19. A method, performed by a network node in a communications network, for positioning a wireless device, the method comprising:
obtaining a measurement report comprising a positioning measurement, performed by a one or more first wireless nodes, on reference signals received from one or more second wireless nodes, wherein the measurement report comprises an indication as to whether the positioning measurement is performed on a Line of Sight (LoS) component of the reference signal, and wherein the measurement report includes an indication of a quality of the indication as to whether the positioning measurement is performed on a LoS component of the reference signal; and
estimating, based on the measurement report, a location of the wireless device.