Method and apparatus for transmitting data of unmanned aerial vehicle control system

• US 10,810,885 B2
• Filed: 09/25/2018
• Issued: 10/20/2020
• Est. Priority Date: 07/02/2018
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Hee Wook
• Primary Examiner(s): Pan, Yuwen
• Assistant Examiner(s): Perez, Angelica M
• Application Number:
  US16/141,763
• Publication Number:
  US 20200005653A1
• Time in Patent Office: 756 Days
• CPC Class Codes: B64C 39/024 of the remote controlled vehicle type, i.e. RPV
• CPC Class Codes: B64U 10/16 with five or more distinct rotor axes, e.g. octocopters
• CPC Class Codes: B64U 2101/00 UAVs specially adapted for particular uses or applications
• CPC Class Codes: B64U 2101/20 for use as communications relays, e.g. high-altitude platforms
• CPC Class Codes: B64U 2201/20 Remote controls
• CPC Class Codes: B64U 2201/202 using tethers for connecting to ground station
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C
• CPC Class Codes: G08G 5/0013 with a ground station
• CPC Class Codes: G08G 5/0021 located in the aircraft
• CPC Class Codes: G08G 5/0069 specially adapted for an unmanned aircraft
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 52/226 using past references to control power, e.g. look-up-table
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed is a method and apparatus for transmitting data of an unmanned aerial vehicle control system. According to an embodiment of the present disclosure, provided is a method of transmitting data of an unmanned aerial vehicle control system, the method including: connecting an unmanned aerial vehicle to a ground radio station via a mission data link and a non-mission data link; checking a maximum transmit power of the non-mission data link; checking a margin value of the non-mission data link considering a state of the unmanned aerial vehicle; checking a required transmit power of the non-mission data link by applying the margin value of the non-mission data link; and determining a transmit power of the non-mission data link by comparing the maximum transmit power with the required transmit power.

Claims

1. A method of transmitting data of an unmanned aerial vehicle control system, the method comprising:

connecting an unmanned aerial vehicle to a ground radio station via a mission data link and a non-mission data link;

checking a maximum transmit power of the non-mission data link;

checking a margin value of the non-mission data link considering a state of the unmanned aerial vehicle;

checking a required transmit power of the non-mission data link by applying the margin value of the non-mission data link; and

determining a transmit power of the non-mission data link by comparing the maximum transmit power with the required transmit power.

2. The method of claim 1, further comprising:

checking at least one selected from a group of a target received power value in the ground radio station, a received power value transmitted to the ground radio station via the non-mission data link, and a loss estimated value of the non-mission data link.

3. The method of claim 2, wherein at the checking of the required transmit power, the required transmit power of the non-mission data link is checked by applying the at least one selected from the group of the target received power value in the ground radio station, the received power value transmitted to the ground radio station via the non-mission data link, and the loss estimated value of the non-mission data link.

4. The method of claim 3, wherein the target received power value in the ground radio station is generated by combining signal-to-noise ratio required in the non-mission data link, a noise power value within a reception bandwidth, a transmission antenna gain value, and a reception antenna gain value.

5. The method of claim 1, wherein the checking of the margin value of the non-mission data link comprises:

checking a margin value for air frame shadowing loss caused by positioning change of the unmanned aerial vehicle.

6. The method of claim 5, wherein the checking of the margin value of the non-mission data link comprises:

checking a margin value for random excess path loss due to multipath fading, a margin value for random RF interference, and a safety margin value required in International Civil Aviation Organization (ICAO); and

determining the margin value of the non-mission data link by combining the margin value for the air frame shadowing loss, the margin value for the random excess path loss due to the multipath fading, the margin value for the random RF interference, and the safety margin value required in the ICAO.

7. A method of transmitting data of an unmanned aerial vehicle control system, the method comprising:

connecting an unmanned aerial vehicle to a ground radio station via a mission data link and a non-mission data link;

receiving a data frame including power control command information from the ground radio station;

checking the power control command information from the data frame;

checking a maximum transmit power of the non-mission data link;

checking a margin value of the non-mission data link considering a state of the unmanned aerial vehicle;

checking a required transmit power of the non-mission data link by applying the power control command information and the margin value of the non-mission data link; and

determining a transmit power of the non-mission data link by comparing the maximum transmit power with the required transmit power.

8. The method of claim 7, wherein the data frame comprises a ramp-up section, a preamble field, a data field, a pilot field, a power control command field, and a ramp-down section.

9. The method of claim 7, further comprising:

checking at least one selected from a group of a target received power value in the ground radio station, a received power value transmitted to the ground radio station via the non-mission data link, and a loss estimated value of the non-mission data link.

10. The method of claim 9, wherein at the checking of the required transmit power, the required transmit power of the non-mission data link is checked by applying the at least one selected from the group of the target received power value in the ground radio station, the received power value transmitted to the ground radio station via the non-mission data link, and the loss estimated value of the non-mission data link.

11. The method of claim 10, wherein the target received power value in the ground radio station is generated by combining signal-to-noise ratio required in the non-mission data link, a noise power value within a reception bandwidth, a transmission antenna gain value, and a reception antenna gain value.

12. The method of claim 7, wherein the checking of the margin value of the non-mission data link further comprises:

checking a margin value for air frame shadowing loss caused by positioning change of the unmanned aerial vehicle.

13. The method of claim 12, wherein the checking of the margin value of the non-mission data link comprises:

checking a margin value for random excess path loss due to multipath fading, a margin value for random RF interference, and a safety margin value required in ICAO; and

determining the margin value of the non-mission data link by combining the margin value for the air frame shadowing loss, the margin value for the random excess path loss due to the multipath fading, the margin value for the random RF interference, and the safety margin value required in the ICAO.

14. The method of claim 7, wherein the checking of the required transmit power comprises:

checking previous power control command information included in a previous data frame; and

calculating a transmit power control value by subtracting the previous power control command information from the power control command information.

15. The method of claim 14, wherein at the calculating of the transmit power control value, the transmit power control value is calculated by applying a predetermined delay compensation index to the previous power control command information.