Signaling in a wireless positioning system

• US 9,797,982 B2
• Filed: 03/30/2015
• Issued: 10/24/2017
• Est. Priority Date: 09/10/2008
• Status: Active Grant

• Current Assignee: NextNav, LLC
• Original Assignee: NextNav, LLC
• Inventors: Sendonaris, Andrew, Raghupathy, Arun, Krasner, Norman F.
• Primary Examiner(s): LIU, HARRY K
• Application Number:
  US14/673,173
• Publication Number:
  US 20150208376A1
• Time in Patent Office: 939 Days
• Field of Search: 342386
• CPC Class Codes: G01S 19/11 wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 5/0226 Transmitters
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Devices, systems, and methods for sending positional information from transmitters/beacons. In one implementation a transmitter generates a range block including a ranging signal and a hybrid block including positioning data, and sends the range block and hybrid block at different times. A user device may receive signals from a plurality of transmitters and generates position/location information using trilateration and measured altitude information in comparison with transmitter altitude information.

Claims

1. A method for providing signaling used for position determination in a positioning system, the method comprising:

generating a first range block at a first transmitter, wherein the first range block includes a first ranging signal;

sending the first range block from the first transmitter in a first predefined slot of a plurality of predefined slots of a first transmit frame;

generating a first hybrid block at the first transmitter, wherein the first hybrid block includes a first positioning signal with positioning data that includes data specifying a location of the first transmitter or data specifying a pressure; and

sending the first hybrid block from the first transmitter in a second transmit frame that is disjoint from the first transmit frame.

2. The method of claim 1, wherein the first hybrid block is sent in the first predefined slot of the second transmit frame.

3. The method of claim 1, wherein the first hybrid block does not include any ranging signal.

4. The method of claim 1, wherein no positioning data is sent from the first transmitter in the first predefined slot of the first transmit frame when the first range block is sent.

5. The method of claim 1, wherein the positioning data includes the data specifying the location of the first transmitter, and the data specifying the location of the first transmitter includes positional coordinate data in one, two, or three dimensions.

6. The method of claim 1, wherein the method comprises:

generating a second hybrid block at the first transmitter, wherein the second hybrid block includes a second positioning signal with positioning data that includes the data specifying the location of the first transmitter or the data specifying the pressure; and

sending the second hybrid block from the first transmitter in a third transmit frame that is disjoint from the first transmit frame, the second transmit frame, or both of the first and second transmit frames.

7. The method of claim 6, wherein the first hybrid block is sent in the first predefined slot of the second transmit frame, and wherein the second hybrid block is sent in the first predefined slot of the third transmit frame.

8. The method of claim 1, wherein the method comprises:

generating a second hybrid block at the first transmitter, wherein the second hybrid block includes a second positioning signal with positioning data that includes the data specifying the location of the first transmitter or the data specifying the pressure; and

sending the second hybrid block from the first transmitter in a second predefined slot of the plurality of predefined slots of the first transmit frame.

9. The method of claim 1, wherein the method comprises:

generating a second range block at a second transmitter, wherein the second range block includes a second ranging signal; and

sending the second range block from the second transmitter in a second predefined slot of the plurality of predefined slots of the first transmit frame;

generating a second hybrid block at the second transmitter, wherein the second hybrid block includes a second positioning signal with positioning data that includes data specifying a location of the second transmitter or data specifying another pressure; and

sending the second hybrid block from the second transmitter in the second transmit frame.

10. The method of claim 9, wherein the first hybrid block is sent in the first predefined slot of the second transmit frame, and wherein the second hybrid block is sent in the second predefined slot of the second transmit.

11. The method of claim 1, wherein the positioning data includes the data specifying the pressure, and wherein the method comprises:

using the data specifying the pressure to estimate an altitude of a receiver.

12. The method of claim 6, wherein the first hybrid block includes data specifying a first lowered resolution value of a transmitter parameter, wherein the second hybrid block includes data specifying a second lowered resolution value of the transmitter parameter, wherein the first lowered resolution value and the second lowered resolution value are selected so as to be usable in combination to generate the transmitter parameter.

13. The method of claim 6, wherein the first hybrid block includes data specifying a first portion of a transmitter parameter, and the second hybrid block includes data specifying a second portion of the transmitter parameter.

14. The method of claim 13, wherein the transmitter parameter is a pressure value, a temperature value, or both the pressure value and the temperature value.

15. The method of claim 13, wherein the transmitter parameter is a latitude value, a longitude value, an altitude value, or any combination of the latitude value, the longitude value and the altitude value.

16. The method of claim 13, wherein the transmitter parameter is a reference time correction for the first transmitter.

17. The method of claim 13, wherein the method comprises:

using the data specifying the first portion of the transmitter parameter and the data specifying the second portion of the transmitter parameter to estimate a position of a receiver that received the first hybrid block and the second hybrid block.

18. The method of claim 1, wherein none of the following data is sent from the first transmitter in the first predefined slot of the first transmit frame:

the data specifying the location of the first transmitter, the data specifying the pressure, data specifying an identifier of the first transmitter, data specifying a reference time correction for the first transmitter, and data specifying a transmit quality metric for the first transmitter.

19. The method of claim 1, wherein the first ranging signal is sent using a first type of modulation, wherein the first positioning signal is sent using a second type of modulation, and wherein the first type of modulation and the second type of modulation are different types of modulation.

20. A network of transmitters for providing signaling used for position determination in a positioning system, wherein the network of transmitters comprises a first transmitter that is configured to:

generate a first range block that includes a first ranging signal;

send the first range block in a first predefined slot of a plurality of predefined slots of a first transmit frame;

generate a first hybrid block that includes a first positioning signal, wherein the first positioning signal includes positioning data that includes data specifying a location of the first transmitter or data specifying a pressure; and

send the first hybrid block in a second transmit frame that is disjoint from the first transmit frame.

21. One or more non-transitory computer-readable media embodying program instructions that, when executed by one or more processors, cause the one or more processors to perform a method for providing signaling used for position determination in a positioning system, the method comprising:

generating a first range block at a first transmitter, wherein the first range block includes a first ranging signal;

sending the first range block from the first transmitter in a first predefined slot of a plurality of predefined slots of a first transmit frame;

generating a first hybrid block at the first transmitter, wherein the first hybrid block includes a first positioning signal with positioning data that includes data specifying a location of the first transmitter or data specifying a pressure; and

sending the first hybrid block from the first transmitter in a second transmit frame that is disjoint from the first transmit frame.

22. The non-transitory computer-readable media of claim 21, wherein the first hybrid block is sent in the first predefined slot of the second transmit frame.

23. The non-transitory computer-readable media of claim 21, wherein the first hybrid block does not include any ranging signal.

24. The non-transitory computer-readable media of claim 21, wherein no positioning data is sent from the first transmitter in the first predefined slot of the first transmit frame when the first range block is sent.

25. The non-transitory computer-readable media of claim 21, wherein the positioning data includes the data specifying the location of the first transmitter, and the data specifying the location of the first transmitter includes positional coordinate data in one, two, or three dimensions.

26. The non-transitory computer-readable media of claim 21, wherein the method comprises:

generating a second hybrid block at the first transmitter, wherein the second hybrid block includes a second positioning signal with positioning data that includes the data specifying the location of the first transmitter or the data specifying the pressure; and

sending the second hybrid block from the first transmitter in a third transmit frame that is disjoint from the first transmit frame, the second transmit frame, or both of the first and second transmit frames.

27. The non-transitory computer-readable media of claim 26, wherein the first hybrid block is sent in the first predefined slot of the second transmit frame, and wherein the second hybrid block is sent in the first predefined slot of the third transmit frame.

28. The non-transitory computer-readable media of claim 21, wherein the method comprises:

generating a second hybrid block at the first transmitter, wherein the second hybrid block includes a second positioning signal with positioning data that includes the data specifying the location of the first transmitter or the data specifying the pressure; and

sending the second hybrid block from the first transmitter in a second predefined slot of the plurality of predefined slots of the first transmit frame.

29. The non-transitory computer-readable media of claim 21, wherein the method comprises:

generating a second range block at a second transmitter, wherein the second range block includes a second ranging signal; and

sending the second range block from the second transmitter in a second predefined slot of the plurality of predefined slots of the first transmit frame;

generating a second hybrid block at the second transmitter, wherein the second hybrid block includes a second positioning signal with positioning data that includes data specifying a location of the second transmitter or data specifying another pressure; and

sending the second hybrid block from the second transmitter in the second transmit frame.

30. The non-transitory computer-readable media of claim 29, wherein the first hybrid block is sent in the first predefined slot of the second transmit frame, and wherein the second hybrid block is sent in the second predefined slot of the second transmit.

31. The non-transitory computer-readable media of claim 21, wherein the positioning data includes the data specifying the pressure, and wherein the method comprises:

using the data specifying the pressure to estimate an altitude of a receiver.

32. The non-transitory computer-readable media of claim 26, wherein the first hybrid block includes data specifying a first lowered resolution value of a transmitter parameter, wherein the second hybrid block includes data specifying a second lowered resolution value of the transmitter parameter, wherein the first lowered resolution value and the second lowered resolution value are selected so as to be usable in combination to generate the transmitter parameter.

33. The non-transitory computer-readable media of claim 26, wherein the first hybrid block includes data specifying a first portion of a transmitter parameter, and the second hybrid block includes data specifying a second portion of the transmitter parameter.

34. The non-transitory computer-readable media of claim 33, wherein the transmitter parameter is a pressure value, a temperature value, or both the pressure value and the temperature value.

35. The non-transitory computer-readable media of claim 33, wherein the transmitter parameter is a latitude value, a longitude value, an altitude value, or any combination of the latitude value, the longitude value and the altitude value.

36. The non-transitory computer-readable media of claim 33, wherein the transmitter parameter is a reference time correction for the first transmitter.

37. The non-transitory computer-readable media of claim 33, wherein the method comprises:

using the data specifying the first portion of the transmitter parameter and the data specifying the second portion of the transmitter parameter to estimate a position of a receiver that received the first hybrid block and the second hybrid block.

38. The non-transitory computer-readable media of claim 21, wherein none of the following data is sent from the first transmitter in the first predefined slot of the first transmit frame:

the data specifying the location of the first transmitter, the data specifying the pressure, data specifying an identifier of the first transmitter, data specifying a reference time correction for the first transmitter, and data specifying a transmit quality metric for the first transmitter.

39. The non-transitory computer-readable media of claim 21, wherein the first ranging signal is sent using a first type of modulation, wherein the first positioning signal is sent using a second type of modulation, and wherein the first type of modulation and the second type of modulation are different types of modulation.