Method and device for assisted positioning in wireless systems

Abstract

A wireless transmit / receive unit (WTRU) receives multiple positioning reference signals from multiple terrestrial transmission points, the positioning reference signals including at least one positioning reference signal from a first terrestrial transmission point and at least one positioning reference signal from a second terrestrial transmission point; transmits a request in the WTRU to initiate positioning using the positioning reference signals received from the satellites on condition that at least one value based on first measurement values ​​of the multiple positioning reference signals satisfies a condition; in response to the request, receives information regarding a set of satellites and selects at least one satellite from the set of satellites; determines a second position estimate for the WTRU based on the at least one positioning reference signal received from the at least one selected satellite; and transmits a message to a network node including information indicating the second position estimate of the WTRU.

Claims

1. A method in a wireless transmission / reception unit (WTRU), Receiving multiple positioning reference signals from multiple ground transmission points, wherein the positioning reference signals include at least one positioning reference signal from a first ground transmission point and at least one positioning signal from a second ground transmission point. On the condition that at least one measurement value of the plurality of positioning reference signals satisfies the conditions, a request to perform satellite-based positioning in the WTRU is transmitted to the network, In response to the aforementioned request, information regarding the satellite set is received from the network, Based on the aforementioned information, select at least one satellite from the set of satellites, Determining a second position estimate of the WTRU based on at least one positioning reference signal received from at least one selected satellite, A method comprising sending a message to a network node containing information indicating the second position estimate of the WTRU.

2. The method according to claim 1, further comprising taking measurements to obtain the at least one measurement value.

3. The method according to claim 1, wherein the message further includes information indicating the at least one selected satellite and at least one of a second measurement related to the at least one selected satellite.

4. The method according to claim 1, wherein the at least one measurement satisfies the condition if one value related to one first measurement satisfies the individual condition.

5. The method according to claim 1, wherein the at least one measurement satisfies the conditions when all measurement values ​​satisfy the individual conditions, and each measurement value relates to a separate first measurement.

6. The method according to claim 1, wherein the at least one measurement value represents at least one of the variance of the estimated position of the WTRU, the standard deviation of the estimated position of the WTRU, and the received signal power of the positioning reference signal.

7. The method according to claim 1, wherein the requirement includes a first position estimate of the WTRU.

8. The method according to claim 1, wherein the information relating to the set of satellites includes a satellite ID.

9. The method according to claim 1, wherein the information relating to the set of satellites includes supporting information that enables the WTRU to select a subset of satellites.

10. The method according to claim 1, wherein the selection is based on a second measurement of at least one positioning reference signal received from at least one satellite of the set of satellites.

11. A wireless transmitter / receiver unit (WTRU), Memory for storing processor executable program instructions, At least one processor, which executes the program instructions, Receiving multiple positioning reference signals from multiple ground transmission points, wherein the positioning reference signals include at least one positioning reference signal from a first ground transmission point and at least one positioning signal from a second ground transmission point. On the condition that at least one measurement value of the plurality of positioning reference signals satisfies the conditions, a request to perform satellite-based positioning in the WTRU is transmitted to the network, In response to the aforementioned request, information regarding the satellite set is received from the network, Based on the aforementioned information, select at least one satellite from the set of satellites, Determining a second position estimate of the WTRU based on at least one positioning reference signal received from at least one selected satellite, A wireless transmit / receive unit (WTRU) comprising at least one processor configured to send a message to a network node containing information indicating the second position estimate of the WTRU.

12. The WTRU according to claim 11, wherein the at least one processor is further configured to execute the program instructions to measure in order to obtain the at least one measurement value.

13. The WTRU according to claim 11, wherein the message further includes information indicating the at least one selected satellite and at least one of a second measurement related to the at least one selected satellite.

14. The WTRU according to claim 11, wherein the at least one measurement satisfies the condition if one value related to one first measurement satisfies the individual condition.

15. The WTRU according to claim 11, wherein the at least one measurement satisfies the conditions if all measurement values ​​satisfy the individual conditions, and each measurement value relates to a separate first measurement.

16. The WTRU according to claim 11, wherein the at least one measurement value represents at least one of the variance of the estimated position of the WTRU, the standard deviation of the estimated position of the WTRU, and the received signal power of the positioning reference signal.

17. The WTRU according to claim 11, wherein the requirement includes a first position estimate of the WTRU.

18. The WTRU according to claim 11, wherein the information relating to the set of satellites includes a satellite ID.

19. The WTRU according to claim 11, wherein the information relating to the set of satellites includes support information that enables the WTRU to select a subset of satellites.

20. The WTRU according to claim 11, wherein the at least one processor is configured to select based on a second measurement of at least one positioning reference signal received from at least one satellite of the set of satellites.

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