Granted Patent B2

US 11,432,367 · App. 16/881,322 · Granted Aug 30, 2022

Inventors: Santanu Dutta (Vienna, VA); Ajay Parikh (North Potomac, MD)

Assignee: ATC Technologies, LLC

H04W84/18H04B7/18513H04L5/0073H04W16/14H04W24/02H04W24/10H04W72/082

Abstract

Claims (131)

1. A hybrid self-organizing network, including:

a cellular network including a cellular base station configured to

sense first interference with respect to the cellular network, and

responsive to sensing the first interference, perform at least one cellular interference mitigation measure, the cellular network configured to provide wireless communications in a first frequency band within a first deployed area; and

a mobile satellite network including a mobile satellite network terminal configured to

sense second interference with respect to the mobile satellite network, and

responsive to sensing the second interference, perform at least one satellite interference mitigation measure, the mobile satellite network configured to provide wireless communications in the first frequency band within a second deployed area separated from the first deployed area by a first standoff distance;

wherein performance of one or both of the at least one cellular interference mitigation measure and the at least one satellite interference mitigation measure results in a second standoff distance that is less than the first standoff distance, and

wherein the cellular base station and the mobile satellite network terminal perform, respectively, the at least one cellular interference mitigation measure and the at least one satellite interference mitigation measure independently and in real time.

2. The hybrid self-organizing network of claim 1 , wherein

the at least one cellular interference mitigation measure includes at least one selected from a group consisting of adaptive receive antenna null steering, adaptive transmit antenna null steering, adaptive receiver interference cancellation, coordinated resource allocation; and

wherein the at least one satellite interference mitigation measure includes at least one selected from a group consisting of adaptive receive antenna null steering, adaptive transmit antenna null steering, adaptive receiver interference cancellation, coordinated resource allocation.

3. The hybrid self-organizing network of claim 1 , wherein the cellular base station is configured to perform the at least one cellular interference mitigation measure independent of knowledge of a location of an interfering transmitter and a location of a receiver of interference.

4. The hybrid self-organizing network of claim 1 , wherein the mobile satellite network terminal is configured to perform the at least one satellite interference mitigation measure independent of knowledge of a location of an interfering transmitter and a location of a receiver of interference.

5. The hybrid self-organizing network of claim 1 , wherein the cellular base station is configured to perform the at least one cellular interference mitigation measure informed by knowledge of a location of an interfering transmitter and a location of a receiver of interference.

6. The hybrid self-organizing network of claim 1 , wherein the mobile satellite network terminal is configured to perform the at least one satellite interference mitigation measure informed by knowledge of a location of an interfering transmitter and a location of a receiver of interference.

7. The hybrid self-organizing network of claim 1 , wherein the mobile satellite network terminal includes:

an antenna array comprising a plurality of antennas, each feeding a radio frequency front end and an analog-to-digital converter (ADC);

wherein the ADCs are configured to receive copies of a radio frequency signal via the antenna array and the radio frequency front ends, and to convert the copies of the radio frequency signal to complex baseband samples;

wherein the at least one satellite interference mitigation measure includes

receiving, from the ADCs, the complex baseband samples;

performing spatial signal processing on the complex baseband samples; and

generating a receive beam based on a result of the spatial signal processing, the receive beam including a null directed toward at least one source of radio frequency interference.

8. The hybrid self-organizing network of claim 7 , wherein generating the receive beam includes

receiving, via the antenna array and the radio frequency front ends, a known pilot signal; and

generating an antenna pattern based on minimizing a mean squared error between the received known pilot signal and a locally generated copy of the known pilot signal.

9. The hybrid self-organizing network of claim 8 , wherein the known pilot signal is a pseudo-random noise sequence embedded in a downlink signal.

10. The hybrid self-organizing network of claim 1 , wherein

the cellular base station includes an antenna; and

the cellular base station is configured to execute the at least one interference mitigation measure by

receiving a radio frequency signal from the mobile satellite terminal;

autonomously determining an angle of arrival for the radio frequency signal; and

generating a transmit beam based on the angle of arrival, the transmit beam including a null directed toward the mobile satellite network terminal.

11. The hybrid self-organizing network of claim 1 , wherein

the cellular base station includes an antenna; and

the cellular base station is configured to execute the at least one interference mitigation measure by

receiving information from the mobile satellite network about a location of the mobile satellite network terminal; and

determining an angle of departure from the antenna toward the mobile satellite network terminal; and

generating a transmit beam for the antenna based on the angle of departure, the transmit beam including a null directed toward the mobile satellite network terminal.

12. The hybrid self-organizing network of claim 1 , wherein the cellular base station includes:

an antenna;

a radio frequency front end; and

an adaptive interference canceller coupled between the antenna and the radio frequency front end, and configured to execute the at least one cellular interference mitigation measure by

receiving an input radio frequency signal from the antenna;

filtering the input radio frequency signal with a bandpass filter;

estimating an interference signal from the filtered input radio frequency signal;

subtracting the interference signal from the filtered input radio frequency signal to generate an output signal; and

transmitting the output signal to the radio frequency front end.

13. The hybrid self-organizing network of claim 1 , wherein the cellular network further includes a cellular intelligent resource scheduler communicatively coupled to the cellular base station, the cellular intelligent resource scheduler configured to:

determine a signal spectrum for the mobile satellite network;

select one or more subbands of a cellular signal which is substantially overlaid with the signal spectrum; and

excise the one or more subbands from an input signal to a receive processor of the cellular base station.

14. The hybrid self-organizing network of claim 13 ,

wherein the cellular base station includes a cellular air interface configured to use orthogonal frequency division multiplexing and time-frequency resource blocks; and

wherein the one or more excised subbands comprise a discrete number of time-frequency resource blocks.

15. The hybrid self-organizing network of claim 14 , wherein the cellular air interface corresponds to a member of the LTE family of 3GPP air interfaces.

16. The hybrid self-organizing network of claim 14 , wherein the cellular air interface corresponds to a member of the 5G family of 3GPP air interfaces.

17. The hybrid self-organizing network of claim 13 , wherein the one or more excised subbands include a signal spectrum that is one selected from a group consisting of an uplink signal spectrum and a downlink signal spectrum.

18. The hybrid self-organizing network of claim 13 , wherein the mobile satellite network includes a satellite intelligent resource scheduler as a component of a satellite hub,

wherein the satellite intelligent resource scheduler is configured to

receive, from the mobile satellite terminal, a location for the mobile satellite terminal; and

transmit, to the cellular intelligent resource scheduler, the location;

wherein the cellular intelligent resource scheduler is configured to

receive, from the satellite intelligent resource scheduler, the location;

determine a distance between the mobile satellite terminal and the cellular base station; and

determine a plurality of cellular resource blocks to be excised based on the signal spectrum and the distance.

19. The hybrid self-organizing network of claim 18 , wherein the plurality of cellular resource blocks and the signal spectrum correspond to an uplink of the cellular network and an uplink of the mobile satellite network.

20. The hybrid self-organizing network of claim 18 , wherein the plurality of cellular resource blocks and the signal spectrum correspond to a downlink of the cellular network and a downlink of the mobile satellite network.

21. The hybrid self-organizing network of claim 18 , wherein

the mobile satellite network and the cellular network are communicatively coupled to a common core network; and

the satellite intelligent resource scheduler and the cellular intelligent resource scheduler are integrated into a common intelligent resource scheduler.

22. The hybrid self-organizing network of claim 13 , wherein

the mobile satellite network includes a satellite intelligent resource scheduler communicatively coupled to a core network of the mobile satellite network and a satellite base station subsystem; and

the satellite intelligent resource scheduler is configured to

receive, from the mobile satellite network terminal, a first location for the mobile satellite network terminal;

receive, from the cellular intelligent resource scheduler, a second location for the cellular base station; and

reorder a polling routine for a mobile satellite earth station based on the first and second location.

23. The hybrid self-organizing network of claim 1 , wherein the cellular network and the mobile satellite network use signal spectra that are cochannel.

24. The hybrid self-organizing network of claim 1 , wherein the cellular network and the mobile satellite network use signal spectra that are non-cochannel.

25. A method for operating a hybrid network including a cellular network and a mobile satellite network, the method including:

controlling the cellular network to provide wireless communications in a first frequency band within a first deployed area;

controlling the mobile satellite network to provide wireless communications in the first frequency band within a second deployed area separated from the first deployed area by a first standoff distance

sensing interference with the wireless communications in the first frequency band and in at least one of the first deployed area or the second deployed area; and

responsive to sensing interference, executing at least one cellular interference mitigation measure and at least one satellite interference mitigation measure to produce a second standoff distance that is less than the first standoff distance,

wherein the cellular base station and the mobile satellite network terminal perform, respectively, the at least one cellular interference mitigation measure and the at least one satellite interference mitigation measure independently and in real time.

26. The method of claim 25 , wherein executing at least one interference mitigation measure includes executing at least one selected from a group consisting of adaptive receive antenna null steering, adaptive transmit antenna null steering, adaptive receiver interference cancellation, coordinated resource allocation.

27. The method of claim 25 , wherein executing at least one interference mitigation measure includes executing at least one interference mitigation measure independent of knowledge of a location of an interfering transmitter and a location of a receiver of interference.

28. The method of claim 25 , wherein executing at least one interference mitigation measure includes executing at least one interference mitigation measure informed by knowledge of a location of an interfering transmitter and a location of a receiver of interference.

29. The method of claim 25 , further comprising:

receiving, with an antenna array comprising a plurality of antennas, each feeding a radio frequency front end and an analog-to-digital converter (ADC), copies of a radio frequency signal;

converting, with the ADC, the copies of the radio frequency signal to complex baseband samples;

performing, with a digital signal processor, spatial signal processing on the complex baseband samples; and

generating a receive beam for a mobile satellite network terminal based on a result of the spatial signal processing, the receive beam including a null directed toward at least one source of radio frequency interference.

30. The method of claim 29 , wherein generating the receive beam includes:

receiving, via the antenna array and the radio frequency front ends, a known pilot signal; and

generating an antenna pattern based on minimizing a mean squared error between the received known pilot signal and a locally generated copy of the known pilot signal.

31. The method of claim 30 , wherein receiving the known pilot signal includes receiving a pseudo-random noise sequence embedded in a downlink signal.

32. The method of claim 25 , further comprising:

receiving a radio frequency signal from a mobile satellite terminal of the mobile satellite network;

autonomously determining an angle of arrival for the radio frequency signal; and

generating a transmit beam based on the angle of arrival, the transmit beam including a null directed toward the mobile satellite network terminal.

33. The method of claim 32 , further comprising:

receiving, with a cellular base station of the cellular network, information from the mobile satellite network about a location of the mobile satellite network terminal;

determining an angle of departure from an antenna of the cellular base station toward the mobile satellite network terminal; and

generating a transmit beam for the antenna based on the angle of departure, the transmit beam including a null directed toward the mobile satellite network terminal.

34. The method of claim 25 , further comprising:

receiving an input radio frequency signal from an antenna of a cellular base station of the cellular network;

filtering the input radio frequency signal with a bandpass filter;

estimating an interference signal from the filtered input radio frequency signal;

subtracting the interference signal from the filtered input radio frequency signal to generate an output signal; and

transmitting the output signal to a radio frequency front end of the cellular base station.

35. The method of claim 25 , further comprising:

determining a signal spectrum for the mobile satellite network;

selecting, with a cellular intelligent resource scheduler communicatively coupled to a cellular base station of the cellular network, one or more subbands of a cellular signal which is substantially overlaid with the signal spectrum; and

excising the one or more subbands from an input signal to a receive processor of the cellular base station.

36. The method of claim 35 , wherein selecting the one or more subbands of the cellular signal includes selecting a discrete number of time-frequency resource blocks for a cellular air interface of the cellular base station configured to use orthogonal frequency division multiplexing and time-frequency resource blocks.

37. The method of claim 36 , wherein selecting subbands of a cellular signal includes selecting a discrete number of time-frequency resource blocks for a cellular air interface corresponding to a member of the LTE family of 3GPP air interfaces.

38. The method of claim 36 , wherein selecting subbands of a cellular signal includes selecting a discrete number of time-frequency resource blocks for a cellular air interface corresponding to a member of the 5G family of 3GPP air interfaces.

39. The method of claim 35 , wherein determining an excised signal spectrum includes determining one selected from a group consisting of an uplink signal spectrum and a downlink signal spectrum.

40. The method of claim 35 , further comprising:

receiving, with a satellite intelligent resource scheduler as a component of a satellite hub, from the mobile satellite network terminal, a location for the mobile satellite network terminal;

transmitting, to the cellular intelligent resource scheduler, the location;

receiving, with the cellular intelligent resource scheduler, the location;

determining, a distance between the mobile satellite network terminal and the cellular base station; and

determining, with the cellular intelligent resource scheduler, a plurality of cellular resource blocks to be excised based on the signal spectrum and the distance.

41. The method of claim 40 , wherein the plurality of cellular resource blocks and the signal spectrum correspond to an uplink of the cellular network and an uplink of the mobile satellite network.

42. The method of claim 40 , wherein the plurality of cellular resource blocks and the signal spectrum correspond to a downlink of the cellular network and a downlink of the mobile satellite network.

43. The method of claim 35 , further comprising:

receiving, from the mobile satellite network terminal, a first location for the mobile satellite network terminal;

receiving, from the cellular intelligent resource scheduler, a second location for the cellular base station; and

reordering, with a satellite intelligent resource scheduler communicatively coupled to a satellite core network and a satellite base station subsystem, a polling routine for a mobile satellite earth station based on the first and second location.

Assignments (13)

Continuity (2)