Channel access method in unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system
First Claim
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1. A channel access method in an unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system, the channel access method comprising:
- setting an uplink frequency and a downlink frequency to each of a ground station and an airborne radio station; and
performing, by the ground station and the airborne radio station, an initial access using the uplink frequency or the downlink frequency,wherein the setting comprises;
measuring, by the airborne radio station, signal energy for all assignable center frequencies;
selecting at least one center frequency corresponding to signal energy that is greater than or equal to a threshold; and
setting, by the airborne radio station, the uplink frequency and the downlink frequency based on the at least one center frequency.
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Abstract
A channel access method in an unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system is provided. The channel access method may include setting an uplink frequency and a downlink frequency to each of a ground station and an airborne radio station, and performing, by the ground station and the airborne radio station, an initial access using the uplink frequency or the downlink frequency.
79 Citations
16 Claims
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1. A channel access method in an unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system, the channel access method comprising:
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setting an uplink frequency and a downlink frequency to each of a ground station and an airborne radio station; and performing, by the ground station and the airborne radio station, an initial access using the uplink frequency or the downlink frequency, wherein the setting comprises; measuring, by the airborne radio station, signal energy for all assignable center frequencies; selecting at least one center frequency corresponding to signal energy that is greater than or equal to a threshold; and setting, by the airborne radio station, the uplink frequency and the downlink frequency based on the at least one center frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A channel access method in an unmanned aerial vehicle (UAV) control and non-payload communication (CNPC) system, the channel access method comprising:
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setting a time slot of an uplink and a downlink frequency to each of a ground station and an airborne radio station; and performing, by the ground station and the airborne radio station, an initial access using the time slot of the uplink or the downlink frequency, wherein the setting comprises; measuring, by the airborne radio station, signal energy for all assignable center frequencies; selecting at least one center frequency corresponding to signal energy that is greater than or equal to a threshold; and setting, by the airborne radio station, the uplink frequency and the downlink frequency based on the at least one center frequency. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification