Method and apparatus using event correlation for identifying an interfering mobile terminal

• US 6,785,526 B2
• Filed: 12/06/2001
• Issued: 08/31/2004
• Est. Priority Date: 04/04/2001
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Stephenson, Gary V., de La Chapelle, Michael, McLain, Christopher John
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): Orgad, Edan
• Application Number:
  US10/008,401
• Publication Number:
  US 20020146995A1
• Time in Patent Office: 999 Days
• Field of Search: 455/12.1, 455/13.2, 455/13.4, 455/296, 455/295, 455/271, 455/427, 455/67.11, 455/67.13, 455/456.3
• US Class Current: 455/296
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system

Abstract

A system and method for quickly detecting and remedying an interference incident caused by one of a plurality of mobile terminals in communication with a transponded satellite. The method makes use of a time line constructed from communications of each of the mobile terminals. The time line forms a real time, sequential record of events wherein various mobile terminals have made contact with the transponded satellite. The method extrapolates from the time line which one of the mobile terminals has caused an interfering event by determining which mobile terminal accessed the communication system just prior to the interference event arising.

Claims

1. A method for rapidly determining which one of a plurality of mobile terminals is causing interference with a transponded satellite orbiting in a vicinity of a target satellite with which the mobile terminals are in communication with, the method comprising the steps of:

using a network operations center (NOC) to monitor and record each transmission event occurring between each said mobile terminal and said target satellite;

creating a time line of said transmissions events, said time line representing a real time, sequential record of said transmission events, and storing said sequential record in a database accessible to said NOC;

when said NOC is informed of an interference event occurring with a satellite adjacent to said target satellite, causing said NOC to access said database, in real time, to determine a specific transmission event that occurred immediately prior to the time that said interference event arose; and

using said NOC to analyze, in real time, said specific transmission event to eliminate said interference condition.

2. The method of claim 1, wherein each said mobile terminal periodically transmits to said NOC attitude information relating to at least one of the group comprising heading, pitch and roll.

3. The method of claim 1, wherein each said mobile terminal periodically transmits to said NOC latitude and longitude information concerning its present position.

4. The method of claim 1, wherein each said mobile terminal periodically transmits information to said NOC concerning a rate of transmission of said information being transmitted.

5. The method of claim 1, wherein said NOC monitors an energy-per-bit to noise spectral density of signals received from each of said mobile terminals.

6. A method for quickly determining which one of a plurality of mobile terminals being carried by a mobile platform is causing interference with a transponded satellite orbiting in a vicinity of a target satellite with which the mobile terminals are in communication with, the method comprising the steps of:

using a ground-based component to monitor and record each transmission event occurring between each one of said mobile terminals and said target satellite, each said transmission event including an identifier transmitted by its associated said mobile terminal to thereby uniquely identify the source of each said transmission event;

using said ground-based component to construct a time line from said recorded transmission events of each of said mobile terminals, said time line representing a real time, sequential record of said transmission events; and

using said ground-component to extrapolate from said time line which one of said mobile terminals has caused said interference.

7. The method of claim 6, wherein each said mobile terminal periodically transmits to said ground-based component information relating to its longitude and latitude.

8. The method of claim 6, wherein each said mobile terminal periodically transmits to said ground-based component information relating to its attitude.

9. The method of claim 6, where said step of using said ground component to extrapolate said interference event comprises:

identifying that said transmission event that occurred immediately prior to said interference arising.

10. A method for quickly determining which one of a plurality of mobile terminals associated with a specific mobile platform is causing interference with a transponded satellite orbiting in a vicinity of a target satellite with which the mobile terminals are in communication with, the method comprising the steps of:

using a ground-based component to monitor and record each transmission event occurring between each one of said mobile terminals and said target satellite, each said transmission event including an identifier transmitted by its associated said mobile terminal to thereby uniquely identify the source of each said transmission event;

using said ground-based component to construct a time line from said recorded transmission events of each of said mobile terminals, said time line representing a sequential record of said transmission events; and

using said ground component to identify, from said time line, that particular transmission event occurring immediately prior to said interference arising; and

determining that said particular transmission event that has caused said interference.

11. The method of claim 10, wherein each said mobile terminal periodically reports its attitude information to said ground-based component.

12. The method of claim 10, wherein each said mobile terminal periodically reports its latitude and longitude to said ground-based component.

13. The method of claim 10, wherein said time line represents a real time record of said transmission events.

14. The method of claim 10, wherein said ground-based component periodically transmits power control commands to each of said mobile terminals.

15. A method for quickly determining which one of a plurality of mobile terminals being carried by a mobile platform is causing interference with a transponded satellite orbiting in a vicinity of a target satellite with which the mobile terminals are in communication with, the method comprising the steps of:

using a ground-based component to monitor and record each transmission event occurring between each one of said mobile terminals and said target satellite, each said transmission event including an identifier transmitted by its associated said mobile terminal to thereby uniquely identify the source of each said transmission event;

using said ground-based component to construct a time line from said recorded transmission events of each of said mobile terminals, said time line representing a real time, sequential record of said transmission events; and

using said ground-component to extrapolate from said time line which one of said mobile terminals caused a specific transmission event that occurred just prior to said interference arising, to thus identify a specific one of said mobile terminals that has caused said interference.