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¿µ¹®Ç¥Áظí Physical and Data Link Layers for Communications of Unmanned Flight Equipment
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¿µ¹®³»¿ë¿ä¾à This standard describes the air interface physical layer and data link for distributed communication between UAV and UAV, and between the UAV and the control unit, and between the UAV and object, which are essential for operation of UAVs operating below 150 m above ground. All three kinds of communication are described as one wireless distributed communication system. First, the communication between UAV and UAV provides a means for avoiding mutual physical collisions when UAV are traveling on arbitrary or designed sky routes. By this means, the communication link necessary to periodically broadcast its position and the communication link necessary to negotiate the mutual flight path are provided together. Second, it also provides the communication link needed for the ground controller to set the mission for navigation of UAV. Third, it also provides a communication link with related objects for automatic takeoff and landing of the UAV or obstacle avoidance. Especially, in order to avoid collision of UAVs in flight, information exchange related to collision avoidance between UAVs should be stably performed in real time. To do this, a real-time resource conflict check is performed. The communications for UAVs are one-to-one, one-to-many, and many-to-many, and resource allocation and communication procedures are described. In the case of a UAV operating at low altitudes, collision avoidance with obstacles as well as UAVs should be considered. In addition, related information is needed to land correctly on the landing area. Communication method and procedures related to the object and the UAV are described. Finally, this standard provides RF characteristics of communication links and the air interface physical layer structure for data transmission, and the data link for communication resource allocation and management.
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