Air-surface test system and method to evaluate potential wireless base station sites

• US 6,397,063 B1
• Filed: 03/30/2001
• Issued: 05/28/2002
• Est. Priority Date: 03/30/2001
• Status: Expired due to Fees

• Current Assignee: Bellsouth Intellectual Property Corporation (AT&T, Inc.)
• Original Assignee: Bellsouth Intellectual Property Corporation (AT&T, Inc.)
• Inventors: Sessions, Drew, Meadows, Vernon
• Primary Examiner(s): LE, THANH C
• Application Number:
  US09/821,864
• Time in Patent Office: 424 Days
• Field of Search: 455/423,424,425,67.1,67.4,67.6,507,517,456,457,11.1
• US Class Current: 455/425
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter

Abstract

The air/surface test system is the first mobile, self-contained apparatus that include telecommunications and automatic position-locating test equipment attached to an aircraft secured to the surface and that is used to accurately evaluate wireless field strengths and locate potential wireless base station sites. The test equipment includes a transmitter, an antenna, and an automatic position-locating system, and is used to simulate a potential base station antenna. Once the test equipment is positioned at a selected elevation, the transmitter produces propagation test signals that are selectively broadcast from the antenna. At the same time, the automatic position-locating system receives and broadcasts signals that are used to calculate near-precise positioning data, such as longitude, latitude, altitude, time, geographic position, speed, and direction of travel data, associated with the test equipment. Thus, the field strengths as well as the positioning data are measured and recorded each time a reading from the test equipment is taken and are used to reconcile aerodynamic and elevation changes, such as changes caused by swaying and/or diving during gusts of wind, to provide reliable field strength data. The test equipment receives, processes, and/or transmits test propagation signals that may include the Industrial, Scientific, and Medical (ISM) Band frequencies, such as, 2.4-2.5 GHz, cellular telephone frequencies, such as, 806-960 MHz, 1710-1855 MHz, and 2500-2690 MHz, paging frequencies, digital processing frequencies, and any other frequency in the electromagnetic spectrum. Once the test survey is completed, the air/surface test system is quickly and easily moved to the next potential site, and therefore, allows wireless service providers to rapidly, inexpensively, and efficiently locate wireless communications equipment.

Claims

1. An air/surface test system for evaluating field strengths of a potential site for wireless communications equipment to connect with a communications network, comprising:

(a) a transmitter capable of producing and communicating test propagation signals;

(b) an antenna capable of broadcasting said test propagation signals;

(c) an automatic position-locating system capable of transceiving positioning signals;

(d) an aircraft capable of being raised;

(e) a power source capable of providing power to one or more of said transmitter, said antenna, and said automatic position-locating system;

(f) guide equipment capable of positioning said aircraft from a surface to a test elevation; and

(g) communications network interface equipment capable of processing said test propagation signals and said positioning signals with multiple receiving locations within a potential cell.

2. The system of claim 1, wherein said aircraft is used to position said antenna and said automatic position-locating system to said test elevation.

3. The system of claim 1, further comprising:

(h) a protective carrier capable of housing said antenna and said automatic position-locating system.

4. The system of claim 3, wherein said protective carrier is capable of housing said transmitter.

5. The system of claim 1, wherein said transmitter comprises said antenna.

6. The system of claim 1, wherein said test propagation signals comprise cellular telephone frequencies.

7. The system of claim 6, wherein said cellular telephone frequencies comprise 806-960 MHz.

8. The system of claim 6, wherein said cellular telephone frequencies comprise 1710-1855 MHz.

9. The system of claim 6, wherein said cellular telephone frequencies comprise 2500-2690 MHz.

10. The system of claim 1, wherein said test propagation signals comprise 2.4-2.5 GHz.

11. The system of claim 1, wherein said test propagation signals comprise any frequency signal in the electromagnetic spectrum.

12. The system of claim 1, wherein said positioning signals are used to evaluate one or more of the following:

(a) longitude;

(b) latitude;

(c) altitude;

(d) time;

(e) geographic position;

(f) speed; and

(g) direction of travel.

13. The system of claim 1, wherein said guide equipment comprises:

(a) at least one tether;

(b) at least one winching system;

(c) at least one pulley system; and

(d) anchoring equipment.

14. The system of claim 1, further comprising:

(i) a surface vehicle capable of transporting said aircraft; and

(j) affixed to said surface vehicle, supplementary guide equipment capable of positioning said aircraft to said test elevation.

15. The system of claim 14, wherein said surface vehicle comprises a truck.

16. The system of claim 15, wherein said truck comprises a flatbed with multiple arms for attaching one or more tethers of said guide equipment.

17. The system of claim 16, wherein said aircraft comprises a balloon.

18. The system of claim 17, further comprising a tear away safety device to automatically deflate said balloon.

19. The system of claim 14, wherein said surface vehicle comprises a boat.

20. The system of claim 1, wherein said aircraft comprises a blimp.

21. The system of claim 1, wherein said power source comprises at least one of the following:

(a) a gasoline-powered generator;

(b) a solar-powered generator; and

(c) an electrical-powered generator.

22. The system of claim 1, wherein said antenna comprises a directional array.

23. The system of claim 1, wherein said antenna comprises an omn-directional array.

24. The system of claim 1, wherein said automatic position-locating system is a mobile, lightweight global position system (GPS).

25. The system of claim 1, wherein said communications network comprises a celestial communications network.

26. The system of claim 1, wherein said communications network comprises a terrestrial communications network.

27. An air/surface test method for evaluating field strengths of a potential wireless base station site to connect with a communications network, comprising:

(a) using an aircraft attached to a surface to position an antenna and an automatic position-locating system at a substantially similar elevation as a proposed wireless communications antenna;

(b) transmitting test propagation signals from said antenna;

(c) transceiving positioning signals from said automatic position-locating system;

(d) receiving said test propagation signals at multiple locations within a potential wireless base station site; and

(e) using said test propagation signals and said positioning signals to evaluate said propagation field strengths at each location within said potential wireless base station site.

28. The method of claim 27, wherein said aircraft is a balloon.

29. The method of claim 27, wherein said aircraft is a blimp.

30. The method of claim 27, wherein said surface comprises a surface vehicle.

31. The method of claim 30, wherein said surface vehicle is a truck.

32. The method of claim 30, wherein said surface vehicle is a boat.

33. The method of claim 27, wherein said test propagation signals comprise cellular telephone frequencies.

34. The method of claim 27, wherein said test propagation signals comprise any frequency signal in the electromagnetic spectrum.