Determining the location of a mobile terminal in the presence of a repeater
View Patent ↗Data characterizing signal propagation times between a mobile user and a plurality of base stations can be received. A dominant signal propagation path between the mobile user and at least one of the plurality of base stations is via a repeater. A valid mobile user position solution is determined by searching a domain of possible mobile user position solutions using the received data and a predetermined repeater time delay. The valid mobile user position solution can be provided. Related apparatus, systems, techniques, and articles are also described.
1. A computer-implemented method comprising:
receiving data characterizing signal propagation times between a mobile user and a plurality of base stations, wherein a dominant signal propagation path between the mobile user and at least one of the plurality of base stations is via a repeater;
determining a valid mobile user position solution by searching a domain of possible mobile user position solutions using the received data and a predetermined repeater time delay to identify one or more of the signal propagation times corresponding to a measurement corrupted by a presence of the repeater; and
providing the valid mobile user position solution.
2. The computer-implemented method of claim 1 , wherein the data characterizing signal propagation times include return trip time (RTT).
3. The computer-implemented method of claim 1 , further comprising determining a time difference of arrival (TDOA) for the plurality of base stations.
4. The computer-implemented method of claim 1 , wherein the valid mobile user position is determined based on a geometrical intersection solution to three or more constant delay circles concentric to a respective base station.
5. The computer-implemented method of claim 1 , wherein a mobile user position is valid when constant delay circles intersect over a region of less than a predetermined area.
6. The computer-implemented method of claim 1 , wherein providing comprises one or more of transmitting, displaying, and persisting.
7. The computer-implemented method of claim 1 , further comprising determining whether the dominant signal propagation path between the mobile user and at least one of the plurality of base stations is via the repeater.
8. The computer-implemented method of claim 1 , further comprising determining whether the predetermined repeater delay is less than one or more of the received signal propagation times.
9. A system comprising:
at least one data processor;
memory storing instructions which, when executed by the at least one data processor, causes the at least one data processor to perform operations comprising:
receiving data characterizing signal propagation times between a mobile user and a plurality of base stations, wherein a dominant signal propagation path between the mobile user and at least one of the plurality of base stations is via a repeater;
determining a valid mobile user position solution by searching a domain of possible mobile user position solutions using the received data and a predetermined repeater time delay to identify one or more of the signal propagation times corresponding to a measurement corrupted by a presence of the repeater; and
providing the valid mobile user position solution.
10. The system of claim 9 , wherein the data characterizing signal propagation times include return trip time (RTT).
11. The system of claim 9 , the operations further comprising determining a time difference of arrival (TDOA) for the plurality of base stations.
12. The system of claim 9 , wherein the valid mobile user position is determined based on a geometrical intersection solution to three or more constant delay circles concentric to a respective base station.
13. The system of claim 9 , wherein a mobile user position is valid when constant delay circles intersect over a region of less than a predetermined area.
14. The system of claim 9 , wherein providing comprises one or more of transmitting, displaying, and persisting.
15. The system of claim 9 , the operations further comprising determining whether the dominant signal propagation path between the mobile user and at least one of the plurality of base stations is via the repeater.
16. The system of claim 9 , the operations further comprising determining whether the predetermined repeater delay is less than one or more of the received signal propagation times.
17. A system comprising:
a plurality of base stations in communication with a mobile device;
a repeater; and
a computing system configured to receive data characterizing signal propagation times between the mobile device and the plurality of base stations; determine a valid mobile device position solution by searching a domain of possible mobile device position solutions using the received data and a predetermined repeater time delay to identify one or more of the signal propagation times corresponding to a measurement corrupted by a presence of the repeater; and provide the valid mobile device position solution;
wherein a dominant signal propagation path between the mobile device and at least one of the plurality of base stations is via the repeater.
18. The system of claim 17 , wherein the data characterizing signal propagation times include return trip time (RTT).
19. The system of claim 17 , the operations further comprising determining a time difference of arrival (TDOA) for the plurality of base stations.
20. The system of claim 17 , wherein the valid mobile device position is determined based on a geometrical intersection solution to three or more constant delay circles concentric to a respective base station.