Method and system for mitigating co-channel interference

• US 7,583,935 B2
• Filed: 11/01/2005
• Issued: 09/01/2009
• Est. Priority Date: 07/08/2005
• Status: Active Grant

• Current Assignee: Telcom Ventures LLC
• Original Assignee: Telcom Ventures LLC
• Inventors: Olexa, George Ron, Singh, Rajendra
• Primary Examiner(s): Kincaid; Lester
• Assistant Examiner(s): DOAN, PHUOC HUU
• Application Number:
  US11/262,975
• Publication Number:
  US 20070010210A1
• Time in Patent Office: 1,400 Days
• Field of Search: None
• US Class Current: 455/73
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 7/18515 Transmission equipment in satellites or space-based relays
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A method of communicating data between a first transceiver and any of a plurality of second transceivers, wherein areas serviced by each of the plurality of second transceivers either overlap or are adjacent. The method comprises operating the first transceiver and the plurality of second transceivers in an overlapping frequency range. Each of the plurality of second transceivers operates in a time period different from a time period of another of the plurality of second transceivers.

Claims

1. A method of communicating data between a first transceiver and one or more of a plurality of second transceivers, wherein areas serviced by each of said plurality of second transceivers either overlap or are adjacent, comprising:

operating said first transceiver and said plurality of second transceivers in an overlapping frequency range, wherein said first transceiver is a terrestrial transceiver, wherein each of said plurality of second transceivers operates in a time period different from a time period of another of said plurality of second transceivers, and wherein said first transceiver is configured to communicate data with one or more of the plurality of second transceivers;

wherein each time period is separated from an adjacent time period by a guard time interval during which no second transceiver operates, said guard time interval having a maximum duration corresponding to a maximum time delay a signal takes to propagate a distance between each of said plurality of second transceivers to associated serviced areas and a minimum duration corresponding to hardware switch-over time, and

wherein said first transceiver monitors signal strength of a received data signal from one of said plurality of second transceivers and compares the signal strength of the received data signal to strength of data signals received from surrounding areas serviced by remaining transceivers in said plurality of second transceivers and selects the second transceiver with the strongest signal.

2. The method according to claim 1, wherein said first transceiver is a receiver and said plurality of second transceivers are transmitters.

3. The method according to claim 1, wherein at least two transceivers in said plurality of second transceivers are terrestrial.

4. The method according to claim 1, wherein said plurality of second transceivers are terrestrial.

5. The method according to claim 1, further comprising controlling each one of said plurality of second transceivers and determining when each one of said plurality of second transceivers communicates with said first transceiver.

6. The method according to claim 5, wherein said plurality of second transceivers are controlled by a same control complex.

7. The method according to claim 1, wherein each one of said second transceivers and said first transceiver form a single network.

8. The method according to claim 1, further comprising commonly controlling communications through each one of said plurality of second transceivers.

9. The method according to claim 1, further comprising receiving communications from or sending communications to each one of said plurality of second transceivers at or from a common control complex.

10. The method according to claim 1, wherein said areas are serviced by said plurality of second transceivers by providing a plurality of data signals to said areas.

11. The method according to claim 10, wherein said plurality of data signals provided to said areas are identical.

12. The method according to claim 1, wherein said guard time interval is selected so that there is substantially no overlap between the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates.

13. The method according to claim 1, wherein said guard time interval is selected so as to minimize or substantially reduce interference between data signals transmitted or received by said first transceiver in said overlapping or adjacent areas.

14. The method according to claim 1, wherein the first transceiver integrates identical data signals received from each of the plurality of second transceivers.

15. The method according to claim 1, wherein one of said plurality of second transceivers is a satellite and said first transceiver is configured to receive a data signal from said satellite and from remaining transceivers in said plurality of second transceivers.

16. The method according to claim 15, wherein each one of said plurality of second transceivers including said satellite, and said first transceiver form a single network.

17. The method according to claim 15, wherein said remaining transceivers in said plurality of second transceivers are terrestrial and are configured to receive the data signal from said satellite.

18. The method according to claim 15, wherein the satellite is assigned a time period while the remaining transceivers in said plurality of second transceivers are assigned remaining time periods.

19. The method according to claim 18, wherein each of the remaining transceivers synchronizes to the time period assigned to the satellite and generates its time period start time.

20. The method according to claim 19, wherein the remaining transceivers are timed based upon a data signal propagation time from the satellite to the ground.

21. The method according to claim 15, wherein the first transceiver locks on a strongest data signal among data signals transmitted by the satellite and the remaining transceivers.

22. The method according to claim 15, wherein the first transceiver integrates identical data signals received from the satellite and each of the remaining transceivers in the plurality of second transceivers.

23. A system for communicating data signals in a network of transceivers, comprising:

a first transceiver, wherein said first transceiver is a terrestrial transceiver; and

a plurality of second transceivers configured to communicate wirelessly with said first transceiver, said second transceivers being configured to service overlapping or adjacent areas, and each of said plurality of second transceivers being configured to operate in a time period different from a time period of another of said plurality of second transceivers;

wherein said first transceiver and said plurality of second transceivers operate in an overlapping frequency range, and said first transceiver is configured to communicate with one or more of said plurality of second transceivers,

wherein each time period is separated from an adjacent time period by a guard time interval during which no second transceiver operates, said guard time interval having a maximum duration corresponding to a maximum time delay a signal takes to propagate a distance between each of said plurality of second transceivers to associated serviced areas and a minimum duration corresponding to hardware switch-over time, and

wherein said first transceiver monitors signal strength of a received data signal from one of said plurality of second transceivers and compares the signal strength of the received data signal to strength of data signals received from surrounding areas serviced by remaining transceivers in said plurality of second transceivers and selects the second transceiver with the strongest signal.

24. The system according to claim 23, wherein said first transceiver is a receiver and said plurality of second transceivers are transmitters.

25. The system according to claim 23, wherein said plurality of second transceivers service said overlapping or adjacent areas by providing a plurality of data signals to said areas.

26. The system according to claim 25, wherein said plurality of data signals provided to said areas are identical.

27. The system according to claim 23, wherein said guard time interval is selected so that there is substantially no overlap between time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates.

28. The system according to claim 23, wherein said guard time interval is selected so as to minimize or substantially eliminate interference between signals transmitted or received by said first transceiver in said overlapping or adjacent areas.

29. The system according to claim 23, wherein the first transceiver integrates identical signals received from each of the plurality of second transceivers.

30. The system according to claim 23, wherein one of said plurality of second transceivers is a satellite and said first transceiver is configured to receive a signal from said satellite and from remaining transceivers in said plurality of second transceivers.

31. The system according to claim 30, wherein said remaining transceivers in said plurality of transceivers are terrestrial and are configured to receive the signal from said satellite.

32. The system according to claim 30, wherein the satellite is assigned a time period while the remaining transceivers in said plurality of transceivers are assigned remaining time periods.

33. The system according to claim 32, wherein each of the remaining transceivers synchronizes to the time period assigned to the satellite and generates its time period start time.

34. The system according to claim 33, wherein the remaining receivers are timed based upon a signal propagation time delay from the satellite to the ground.

35. The system according to claim 30, wherein the first transceiver is configured to lock on a strongest data signal among data signals transmitted by the satellite and the remaining transceivers.

36. The system according to claim 30, wherein the first transceiver is configured to integrate identical signals received from the satellite and each of the remaining transceivers in the plurality of second transceivers.

37. The system according to claim 23, further comprising a control complex configured to process signals and communicate the signals to said plurality of second transceivers.

38. The system according to claim 37, further comprising a multiplexer-demultiplexer distribution unit in communication with the control complex, said multiplexer-demultiplexer distribution unit being configured to distribute the signals to said plurality of second transceivers.

39. The system according to claim 37, wherein said control complex comprises a signal coding and framing device and a signal formatting and buffering device.

40. The system according to claim 38, further comprising an uplink system in communication with multiplexer-demultiplexer, wherein the uplink system is configured to send the signal received from the multiplexer-demultiplexer to a satellite.

41. The system according to claim 40, wherein the satellite is configured to communicate with at least one of said plurality of second transceivers, with said first transceiver or both.

42. A method of communicating data between a first transceiver and one or more of a plurality of second transceivers, wherein areas serviced by each of said plurality of second transceivers either overlap or are adjacent, comprising:

operating said first transceiver and said plurality of second transceivers in an overlapping frequency range, wherein said first transceiver is a terrestrial transceiver, wherein each of said plurality of second transceivers operates in a time period different from a time period of another of said plurality of second transceivers, and wherein said first transceiver is configured to communicate data with one or more of the plurality of second transceivers;

wherein each time period is separated from an adjacent time period by a guard time interval during which no second transceiver operates, said guard time interval having a maximum duration corresponding to a maximum time delay a signal takes to propagate a distance between each of said plurality of second transceivers to associated serviced areas and a minimum duration corresponding to hardware switch-over time, and

wherein each transceiver in said plurality of second transceivers monitors data signal strength of a received data signal from said first transceiver and compares the data signal strength of the received data signal to strength of signals received by remaining transceivers in said plurality of second transceivers from said first transceiver, a transceiver in said plurality of second transceivers receiving the strongest data signal from the first transceiver takes on communication with said first transceiver.

43. The method according to claim 42, wherein said guard time interval is selected so that there is substantially no overlap between the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates.

44. The method according to claim 42, wherein said guard time interval is selected so as to minimize or substantially reduce interference between data signals transmitted or received by said first transceiver in said overlapping or adjacent areas.

45. The method according to claim 42, further comprising controlling each one of said plurality of second transceivers and determining when each one of said plurality of second transceivers communicates with said first transceiver.

46. The method according to claim 45, wherein said plurality of second transceivers are controlled by a same control complex.

47. The method according to claim 42, wherein one of said plurality of second transceivers is a satellite and said first transceiver is configured to receive a data signal from said satellite and from remaining transceivers in said plurality of second transceivers.

48. The method according to claim 47, wherein the satellite is assigned a time period while the remaining transceivers in said plurality of second transceivers are assigned remaining time periods.

49. The method according to claim 48, wherein each of the remaining transceivers synchronizes to the time period assigned to the satellite and generates its time period start time.

50. The method according to claim 42, wherein each one of said second transceivers and said first transceiver form a single network.

51. The method according to claim 42, further comprising commonly controlling communications through each one of said plurality of second transceivers.

52. The method according to claim 42, further comprising receiving communications from or sending communications to each one of said plurality of second transceivers at or from a common control complex.

53. The method according to claim 42, wherein said areas are serviced by said plurality of second transceivers by providing a plurality of data signals to said areas.

54. The method according to claim 53, wherein said plurality of data signals provided to said areas are identical.

55. A system for communicating data signals in a network of transceivers, comprising:

a first transceiver, wherein said first transceiver is a terrestrial transceiver; and

a plurality of second transceivers configured to communicate wirelessly with said first transceiver, said second transceivers being configured to service overlapping or adjacent areas, and each of said plurality of second transceivers being configured to operate in a time period different from a time period of another of said plurality of second transceivers;

wherein said first transceiver and said plurality of second transceivers operate in an overlapping frequency range, and said first transceiver is configured to communicate with one or more of said plurality of second transceivers,

wherein each time period is separated from an adjacent time period by a guard time interval during which no second transceiver operates, said guard time interval having a maximum duration corresponding to a maximum time delay a signal takes to propagate a distance between each of said plurality of second transceivers to associated serviced areas and a minimum duration corresponding to hardware switch-over time, and

wherein each transceiver in said plurality of second transceivers monitors data signal strength of a received data signal from said first transceiver and compares the data signal strength of the received data signal to strength of signals received by remaining transceivers in said plurality of second transceivers from said first transceiver, a transceiver in said plurality of second transceivers receiving the strongest data signal from the first transceiver takes on communication with said first transceiver.

56. The system according to claim 55, wherein said guard time interval is selected so that there is substantially no overlap between the time period during which each of said plurality of second transceivers operates and the time period during which another of said plurality of second transceivers operates.

57. The system according to claim 55, wherein said guard time interval is selected so as to minimize or substantially eliminate interference between signals transmitted or received by said first transceiver in said overlapping or adjacent areas.

58. The system according to claim 55, wherein one of said plurality of second transceivers is a satellite and said first transceiver is configured to receive a signal from said satellite and from remaining transceivers in said plurality of second transceivers.

59. The system according to claim 58, wherein the first transceiver is configured to lock on a strongest data signal among data signals transmitted by the satellite and the remaining transceivers.

60. The system according to claim 55, further comprising a control complex configured to process signals and communicate the signals to said plurality of second transceivers.

61. The system according to claim 55, further comprising a control complex configured to process signals and communicate the signals to said plurality of second transceivers.

62. The system according to claim 61, further comprising a multiplexer-demultiplexer distribution unit in communication with the control complex, said multiplexer-demultiplexer distribution unit being configured to distribute the signals to said plurality of second transceivers.

63. The system according to claim 61, wherein said control complex comprises a signal coding and framing device and a signal formatting and buffering device.

64. The system according to claim 62, further comprising an uplink system in communication with multiplexer-demultiplexer, wherein the uplink system is configured to send the signal received from the multiplexer-demultiplexer to a satellite.

65. The system according to claim 64, wherein the satellite is configured to communicate with at least one of said plurality of second transceivers, with said first transceiver or both.