Locating a Source of Wireless Transmissions from a Licensed User of a Licensed Spectral Resource

• US 20110250908A1
• Filed: 04/12/2010
• Published: 10/13/2011
• Est. Priority Date: 04/12/2010
• Status: Active Grant

• Current Assignee: Optis Cellular Technology LLC (Brevet Capital)
• Original Assignee: Optis Cellular Technology LLC (Brevet Capital)
• Inventors: Olsson, Thomas, Rosenqvist, Anders
• Granted Patent: US 8,526,974 B2
• Time in Patent Office: Days
• US Class Current: 455/456.5
• CPC Class Codes: G01S 5/0009 Transmission of position information to remote stations involving assistance data G01S5/0236
• CPC Class Codes: H04W 4/029 Location-based management or tracking services

Abstract

Own communication equipment locates a source of wireless transmissions, the own equipment including a serving base station (BS). The serving BS receives, from remote sensors including at least one user equipment (UE), sensing information from which transmitter location information (“location information”) can be determined. The location information is oriented in a serving BS coordinate system. The location information can comprise white space sensing information from which a direction of a transmitter relative to a position of the UE can be determined, and pilot signal sensing information from which respective directions of one or more BSs relative to the position of the UE can be determined. The BS transforms the white space and pilot signal sensing information into the location information. Geographical safety margins are determined from the location information, and BS transmissions are adjusted to limit transmitting signals beyond the geographical safety margin area.

Claims

1. A method of operating own mobile communication system equipment to locate a transmitter that is using a spectral resource, wherein the own mobile communication system equipment includes a serving base station that serves at least one user equipment, the method comprising:

operating the serving base station to receive, from each one of two or more remote sensors, sensing information from which transmitter location information can be determined, wherein the transmitter location information is oriented in a coordinate system used by the serving base station and wherein the remote sensors include at least one user equipment;

determining one or more geographical safety margins from the transmitter location information; and

adjusting transmissions from the serving base station to limit transmitting signals into a geographical area bounded by the one or more geographical safety margins.

2. The method of claim 1, wherein for each of the at least one user equipment, the sensing information supplied by the at least one user equipment comprises:

white space sensing information from which a direction of the transmitter relative to a position of the user equipment can be determined; and

pilot signal sensing information indicative of a respective one or more directions of one or more base stations, wherein the pilot signal sensing information is oriented in a steering plane of the user equipment, wherein the one or more base stations may or may not include the serving base station,

and wherein the method comprises operating the serving base station to transform the white space sensing information and the pilot signal sensing information received from the at least one user equipment into the transmitter location information oriented in a coordinate system used by the serving base station.

3. The method of claim 2, wherein operating the serving base station to transform the white space sensing information and the pilot signal sensing information received from the at least one user equipment into transmitter location information comprises:

operating the serving base station to use the pilot signal sensing information to ascertain, for each of the at least one user equipment, respective steering plane orientation information; and

operating the serving base station to use the steering plane orientation information of the at least one user equipment and the white space sensing information from the at least one user equipment to ascertain the transmitter location information in the coordinate system used by the serving base station.

4. The method of claim 2, wherein the white space sensing information and the pilot signal sensing information each comprise information representing angles and received power at the respective angles.

5. The method of claim 2, wherein:

the white space sensing information comprises information obtained by means of a first sweep of the user equipment receiver lobe and information obtained by means of a second sweep of the user equipment receiver lobe; and

the method comprises comparing the information obtained by means of the first sweep of the user equipment receiver lobe with the information obtained by means of the second sweep of the user equipment receiver lobe to ascertain a measure of scanning reliability.

6. The method of claim 5, wherein operating the serving base station to transform the white space sensing information and the pilot signal sensing information received from the at least one user equipment into transmitter location information oriented in the coordinate system used by the serving base station comprises ignoring elements of the white space sensing information that are associated with a measure of scanning reliability that does not satisfy a predetermined reliability requirement.

7. The method of claim 2, comprising:

operating a user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined;

operating the user equipment to generate the pilot signal sensing information from which the direction of the one or more base stations relative to the position of the user equipment can be determined; and

operating the user equipment to communicate the white space sensing information and the pilot signal sensing information to the serving base station.

8. The method of claim 7, wherein operating the user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined comprises:

sweeping a receiver lobe of the user equipment at least one revolution while making white space received power estimates to obtain a set of white space received power estimates as a function of direction.

9. A method of operating a user equipment to sense a transmitter that is using a spectral resource, the method comprising:

operating the user equipment to generate white space sensing information from which a direction of the transmitter relative to the position of the user equipment can be determined;

operating the user equipment to generate pilot signal sensing information indicative of a respective one or more directions of one or more base stations, wherein the pilot signal sensing information is oriented in a steering plane of the user equipment, wherein the one or more base stations may or may not include the serving base station; and

operating the user equipment to communicate the white space sensing information and the pilot signal sensing information to a serving base station.

10. The method of claim 9, wherein operating the user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined comprises:

sweeping a receiver lobe of the user equipment at least one revolution while making white space received power estimates to obtain a set of white space received power estimates as a function of direction.

11. The method of claim 10, wherein:

sweeping the receiver lobe of the user equipment at least one revolution while making white space received power estimates to obtain a set of white space received power estimates as a function of direction comprises sweeping the receiver lobe of the user equipment at least two revolutions while making white space received power estimates to obtain at least two sets of white space received power estimates as a function of direction; and

the method comprises;

the user equipment comparing respective ones of the at least two sets of white space received power estimates as a function of direction with one another to obtain a measure of scanning reliability,

wherein operating the user equipment to communicate the white space sensing information and the pilot signal sensing information to the serving base station is performed only if the measure of scanning reliability satisfies one or more predetermined criteria.

12. The method of claim 9, wherein operating the user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined comprises:

sweeping a receiver lobe of the user equipment at least one revolution during a sweep time;

making white space received power estimates as a function of direction from the radio signal received during the sweep time; and

including within the white space sensing information only those white space received power estimates and their respective directions that satisfy predetermined reception power criteria.

13. An apparatus for operating own mobile communication system equipment to locate a transmitter that is using a spectral resource, wherein the own mobile communication system equipment includes a serving base station that serves at least one user equipment, the method comprising:

circuitry configured to operate the serving base station to receive, from each one of two or more remote sensors, sensing information from which transmitter location information can be determined, wherein the transmitter location information is oriented in a coordinate system used by the serving base station and wherein the remote sensors include at least one user equipment;

circuitry configured to determine one or more geographical safety margins from the transmitter location information; and

circuitry configured to adjust transmissions from the serving base station to limit transmitting signals into a geographical area bounded by the one or more geographical safety margins.

14. The apparatus of claim 13, wherein for each of the at least one user equipment, the sensing information supplied by the at least one user equipment comprises:

white space sensing information from which a direction of the transmitter relative to a position of the user equipment can be determined; and

pilot signal sensing information indicative of a respective one or more directions of one or more base stations, wherein the pilot signal sensing information is oriented in a steering plane of the user equipment, wherein the one or more base stations may or may not include the serving base station,

and wherein the apparatus comprises circuitry configured to transform the white space sensing information and the pilot signal sensing information received from the at least one user equipment into the transmitter location information oriented in a coordinate system used by the serving base station.

15. The apparatus of claim 14, wherein the circuitry configured to transform the white space sensing information and the pilot signal sensing information received from the at least one user equipment into transmitter location information comprises:

circuitry configured to use the pilot signal sensing information to ascertain, for each of the at least one user equipment, respective steering plane orientation information; and

circuitry configured to use the steering plane orientation information of the at least one user equipment and the white space sensing information from the at least one user equipment to ascertain the transmitter location information in the coordinate system used by the serving base station.

16. The apparatus of claim 14, wherein the white space sensing information and the pilot signal sensing information each comprise information representing angles and received power at the respective angles.

17. The apparatus of claim 14, wherein:

the white space sensing information comprises information obtained by means of a first sweep of the user equipment receiver lobe and information obtained by means of a second sweep of the user equipment receiver lobe; and

the apparatus comprises circuitry configured to ascertain a measure of scanning reliability by comparing the information obtained by means of the first sweep of the user equipment receiver lobe with the information obtained by means of the second sweep of the user equipment receiver lobe.

18. The apparatus of claim 17, wherein the circuitry configured to transform the white space sensing information and the pilot signal sensing information received from the at least one user equipment into transmitter location information oriented in the coordinate system used by the serving base station comprises circuitry configured to ignore elements of the white space sensing information that are associated with a measure of scanning reliability that does not satisfy a predetermined reliability requirement.

19. The apparatus of claim 14, comprising:

circuitry configured to cause a user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined;

circuitry configured to operate the user equipment to generate the pilot signal sensing information from which the direction of the one or more base stations relative to the position of the user equipment can be determined; and

circuitry configured to operate the user equipment to communicate the white space sensing information and the pilot signal sensing information to the serving base station.

20. The apparatus of claim 19, wherein the circuitry configured to operate the user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined comprises:

circuitry configured to sweep a receiver lobe of the user equipment at least one revolution while making white space received power estimates to obtain a set of white space received power estimates as a function of direction.

21. An apparatus for operating a user equipment to sense a transmitter that is using a spectral resource, the apparatus comprising:

circuitry configured to operate the user equipment to generate white space sensing information from which a direction of the transmitter relative to the position of the user equipment can be determined;

circuitry configured to operate the user equipment to generate pilot signal sensing information indicative of a respective one or more directions of one or more base stations, wherein the pilot signal sensing information is oriented in a steering plane of the user equipment, wherein the one or more base stations may or may not include the serving base station; and

circuitry configured to operate the user equipment to communicate the white space sensing information and the pilot signal sensing information to a serving base station.

22. The apparatus of claim 21, wherein the circuitry configured to operate the user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined comprises:

circuitry configured to sweep a receiver lobe of the user equipment at least one revolution while making white space received power estimates to obtain a set of white space received power estimates as a function of direction.

23. The apparatus of claim 22, wherein:

the circuitry configured to sweep the receiver lobe of the user equipment at least one revolution while making white space received power estimates to obtain a set of white space received power estimates as a function of direction comprises circuitry configured to sweep the receiver lobe of the user equipment at least two revolutions while making white space received power estimates to obtain at least two sets of white space received power estimates as a function of direction; and

the apparatus comprises;

circuitry configured to compare respective ones of the at least two sets of white space received power estimates as a function of direction with one another to obtain a measure of scanning reliability,

wherein the circuitry configured to operate the user equipment to communicate the white space sensing information and the pilot signal sensing information to the serving base station is activated only if the measure of scanning reliability satisfies one or more predetermined criteria.

24. The apparatus of claim 21, wherein the circuitry configured to operate the user equipment to generate the white space sensing information from which the direction of the transmitter relative to the position of the user equipment can be determined comprises:

circuitry configured to sweep a receiver lobe of the user equipment at least one revolution during a sweep time;

circuitry configured to make white space received power estimates as a function of direction from the radio signal received during the sweep time; and

circuitry configured to include within the white space sensing information only those white space received power estimates and their respective directions that satisfy predetermined reception power criteria.

25. A computer readable storage medium having stored thereon a set of program instructions that, when executed by one or more programmable processors, cause the one or more programmable processors to perform a method of operating own mobile communication system equipment to locate a transmitter that is using a spectral resource, wherein the own mobile communication system equipment includes a serving base station that serves at least one user equipment, the method of operating the own mobile communication system equipment comprising:

operating the serving base station to receive, from each one of two or more remote sensors, sensing information from which transmitter location information can be determined, wherein the transmitter location information is oriented in a coordinate system used by the serving base station and wherein the remote sensors include at least one user equipment;

determining one or more geographical safety margins from the transmitter location information; and

adjusting transmissions from the serving base station to limit transmitting signals into a geographical area bounded by the one or more geographical safety margins.