On demand positioning in a wireless communication system

1. A method, performed in a wireless device, for obtaining position information of user equipment (UE) in a wireless communication system, the method comprising:

transmitting, to a Service Mobile Location Center (SMLC), an indication comprising beam information defining beams that are suitable to be used for transmitting Positioning Reference Signals (PRS) to the wireless device, for determination of PRS scheduling information by the SMLC based on the beam information from the wireless device;

receiving, from the SMLC, the PRS scheduling information for upcoming transmission of the PRS from a base station;

performing measurements on the PRS based on the PRS scheduling information that was received; and

providing the measurements to the SMLC,

wherein the SMLC is remotely located from the base station.

2. The method of claim 1 , wherein the PRS scheduling information comprises information indicating cells and beams in which PRS is transmitted.

3. The method of claim 1 , wherein the PRS scheduling information further comprises a time and/or a frequency in which PRS is transmitted.

4. The method of claim 1 , wherein the PRS are received from one or more base stations, responsive to a PRS order from a positioning node, using a given beam that is suitable to be used for transmitting PRS, at a given time.

5. The method of claim 1 , wherein the performing measurements on the PRS comprises:

performing Observed Time Difference of Arrival (OTDOA) measurements based on the PRS; and

communicating Reference Signal Time Different Measurement (RSTD) information based on the OTDOA measurements.

6. The method of claim 1 , further comprising:

receiving, prior to the transmitting the indication, a positioning request from the base station, responsive to a trigger event.

7. The method of claim 1 , wherein the receiving the PRS scheduling information comprises:

receiving the PRS scheduling information from a positioning node, using LTE positioning protocol, LPP.

8. The method of claim 1 , further comprising:

providing an update to a positioning node responsive to determining that the position information of the UE has changed, wherein the update comprises to an update to a cell and/or a beam.

9. The method of claim 8 , further comprising:

receiving, from the base station, additional control signaling comprising updated PRS scheduling information, responsive to the providing the update.

10. The method of claim 9 , further comprising:

receiving subsequent PRS signals on an updated beam associated with the updated PRS scheduling information; and

providing updated measurements comprising an updated UE position information, responsive to the receiving the subsequent PRS signals.

11. A method, performed in a Service Mobile Location Center (SMLC), for obtaining position information of user equipment (UE) in a wireless communication system, the method comprising:

receiving, from the UE, an indication comprising beam information defining beams that are suitable to be used for Positioning Reference Signals (PRS) for the UE;

determining, by the SMLC, PRS scheduling information for upcoming transmission of the PRS based on the beam information that was received;

transmitting, to the UE via a base station, the PRS scheduling information for upcoming transmission of the PRS based on the beam information that was received;

triggering transmission of the PRS to the UE; and

receiving, from the UE, measurements on the PRS that was transmitted to the UE,

wherein the SMLC is remotely located from the base station.

12. The method of claim 11 , wherein the PRS scheduling information comprises information indicating one or more cells and one or more beams in which PRS is transmitted.

13. The method of claim 11 , wherein the PRS are transmitted by a base station, responsive to a PRS order from a positioning node using a given beam that is suitable for transmitting PRS, at a given time.

14. The method of claim 11 , wherein the transmitting the PRS scheduling information comprises:

transmitting a positioning request to the UE, responsive to an authority request.

15. The method of claim 11 , further comprising:

transmitting, prior to the transmitting the PRS scheduling information, a positioning request, responsive to a trigger event.

16. The method of claim 11 , wherein the transmitting the PRS scheduling information comprises:

transmitting the PRS scheduling information to the UE from a positioning node using LTE positioning protocol, LPP.

17. The method of claim 11 , further comprising:

receiving an update from a UE, the update comprising updated information associated with a cell and/or a beam.

18. The method of claim 17 , further comprising:

transmitting, additional control signaling comprising updated PRS scheduling information, responsive to receiving the update.

19. The method of claim 18 , further comprising:

transmitting subsequent PRS on an updated beam associated with the updated PRS scheduling information; and

receiving updated measurements comprising an updated UE position information, responsive to the transmitting the subsequent PRS.

20. A wireless electronic device used in a wireless communication system, the wireless electronic device comprising:

a processor; and

a memory coupled to the processor, the memory comprising computer readable program code embodied therein that, when executed by the processor, causes the processor to perform operations comprising:

transmitting, to a Service Mobile Location Center (SMLC), an indication comprising beam information defining beams that are suitable to be used for transmitting Positioning Reference Signals (PRS) to the wireless electronic device, for determination of PRS scheduling information by the SMLC based on the beam information from the wireless electronic device;

receiving, from the SMLC, the PRS scheduling information for upcoming transmission of the PRS from a base station;

performing measurements on the PRS based on the PRS scheduling information that was received; and

providing the measurements to the SMLC,

wherein the SMLC is remotely located from the base station.