Systems and methods for location positioning of user device

• US 9,247,392 B2
• Filed: 06/04/2013
• Issued: 01/26/2016
• Est. Priority Date: 06/05/2012
• Status: Active Grant

• Current Assignee: NextNav, LLC
• Original Assignee: NextNav, LLC
• Inventors: Raghupathy, Arun, Pattabiraman, Ganesh, Clark, Henry, Sendonaris, Andrew, Willhoff, Steven J., Kumar, Shubham
• Primary Examiner(s): Lai, Daniel
• Application Number:
  US13/909,977
• Publication Number:
  US 20130324154A1
• Time in Patent Office: 966 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G01S 19/10 providing dedicated supplementary positioning signals
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G01S 19/46 the supplementary measurement being of a radio-wave signal type
• CPC Class Codes: G01S 19/52 Determining velocity
• CPC Class Codes: G01S 5/0236 Assistance data, e.g. base station almanac
• CPC Class Codes: H04W 12/77 Graphical identity
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 4/025 using location based information parameters
• 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 gathering, calculating and sending positioning information at a user device to one or more networks may be disclosed. In a first implementation the user device transforms pseudorange information relating to terrestrial beacons into GNSS pseudorange information. In a second implementation, the user device sends position information using GNSS information elements. In a third implementation, the user device sends position information using non-GNSS information elements.

Claims

1. A method for determining position data used to estimate a position of a receiver, the method comprising:

determining a first set of estimated distances between a receiver and each of a plurality terrestrial transmitters based on positioning signals transmitted by the terrestrial transmitters;

determining an estimated location of the receiver using the first set of estimated distances;

determining a second set of estimated distances between each of a plurality of satellites and the estimated location of the receiver using the estimated location of the receiver and constellation information associated with the plurality of satellites, wherein the constellation information associated with the plurality of satellites includes a position and a timing correction for each of the plurality of satellites at a reference time; and

transmitting the reference time and the second set of estimated distances to a computing device.

2. The method of claim 1, wherein the estimated location of the receiver is further based on latitude, longitude and altitude parameters for each of the plurality of terrestrial transmitters.

3. The method of claim 2, wherein the estimated location of the receiver is further based on a pressure measurement measured by a pressure sensor of the receiver.

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

determining an estimated velocity of the receiver;

determining a first set of Doppler values for the satellites;

determining a second set of Doppler values based on the estimated velocity and the first set of Doppler values; and

transmitting the second set of Doppler values to the computing device.

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

transmitting the second set of estimated distances to the computing device using a standard protocol for transmitting GNSS positioning information in a cellular network.

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

transmitting the second set of estimated distances to the computing device using a plurality of bits allocated for transmission of GNSS positioning information.

7. The method of claim 1, wherein the second set of estimated distances are transmitted to the computing device by mapping bits corresponding to the second set of estimated distances into a set of bits for GNSS information elements.

8. The method of claim 7, wherein the second set of estimated distances are transmitted to the computing device by transmitting the set of bits with the mapped bits corresponding to the second set of estimated distances to the computing device.

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

using assistance data to determine the estimated location of the receiver, wherein the assistance data specifies latitude, longitude, altitude, a pressure measurement, and a temperature measurement for each of the plurality of terrestrial transmitters.

10. The method of claim 9, wherein the assistance data is accessed from a data source coupled to the computing device.

11. The method of claim 9, wherein the assistance data is accessed via a control plane or a user plane communication channel.

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

transmitting, to the computing device, pressure and temperature measurements that correspond to atmospheric conditions at the receiver.

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

identifying one of more of the plurality of terrestrial transmitters based on its proximity to one or more corresponding cellular transmitters that are exchanging information with the receiver.

14. The method of claim 1, wherein the computing device is a remote server at a different location than the receiver.

15. The method of claim 1, wherein the first set of estimated distances are pseudo-ranges.

16. A method for determining position data used to estimate a position of a receiver, the method comprising:

determining a first set of estimated distances between a receiver and each of a plurality terrestrial transmitters based on positioning signals transmitted by the terrestrial transmitters;

using a first plurality of bits allocated for transmission of geographic positioning information to transmit the first set of estimated distances to a computing device;

using a second plurality of bits allocated for transmission of a first type of geographic positioning information to transmit an indicator to the computing device, wherein the indicator is specifies that the first set of estimated distances are not the first type of geographic positioning information; and

determining an estimated location of the receiver using the first set of estimated distances.

17. The method of claim 16, wherein the first type of geographic positioning information is GNSS geographic positioning information.

18. A method for determining position data used to estimate a position of a receiver, the method comprising:

determining a first set of estimated distances between a receiver and each of a plurality terrestrial transmitters based on positioning signals transmitted by the terrestrial transmitters;

using a first plurality of bits allocated for transmission of geographic positioning information to transmit the first set of estimated distances to a computing device; and

transmitting a compressed identifier corresponding to a transmitter from the plurality of terrestrial transmitters to the computing device, wherein the computing device compares the compressed identifier to a list of uncompressed identifiers; and

determining an estimated location of the receiver using the first set of estimated distances.

19. The method of claim 18, wherein the computing device identifies the latitude, longitude and altitude of the transmitter after matching the compressed identifier with one of the listed uncompressed identifiers that corresponds to the transmitter.

20. The method of claim 19, wherein the estimated location is determined using the latitude, longitude and altitude of the transmitter.

21. A method for determining position data used to estimate a position of a receiver, the method comprising:

determining a first set of estimated distances between a receiver and each of a plurality terrestrial transmitters based on positioning signals transmitted by the terrestrial transmitters;

receiving assistance data that specifies a code, a time slot, a quality indicator, a frequency search space, transmitter latitude, transmitter longitude, transmitter altitude, a pressure measurement, a temperature measurement, a unique identifier, and a timing correction for each of the plurality of terrestrial transmitters;

determining an estimated location of the receiver by estimating latitude, longitude and altitude of the receiver using the first set of estimated distances and some or all of the assistance data; and

transmitting the estimated latitude, longitude and altitude to a computing device.

22. A method for determining position data used to estimate a position of a receiver, the method comprising:

determining a first set of estimated distances between a receiver and each of a plurality terrestrial transmitters based on positioning signals transmitted by the terrestrial transmitters;

determining an estimated location of the receiver using the first set of estimated distances; and

transmitting a compressed identifier corresponding to a transmitter from the plurality of terrestrial transmitters from the receiver to a computing device, wherein the computing device compares the compressed identifier to a list of uncompressed identifiers that correspond to a geographic area defined by a base station communicating with the receiver.

23. The method of claim 22, wherein the computing device identifies the latitude, longitude and altitude of the transmitter after matching the compressed identifier with one of the listed uncompressed identifiers that corresponds to the transmitter.

24. The method of claim 23, wherein the estimated location is determined using the latitude, longitude and altitude of the transmitter.