Abstract:

With the rapid development of the low-altitude economy, the high-density operation of aircraft has imposed stringent requirements on collision avoidance capabilities. Aiming at the communication requirements for low-altitude collaborative collision avoidance, this paper proposes a system architecture based on Cellular-Vehicle-to-Everything (C-V2X) Proximity-services Communication 5 (PC5) sidelink communication, which consists of the sidelink communication interaction layer, the wide-area communication management layer, and the on-board fusion execution layer. Typical low-altitude scenarios and corresponding communication performance requirements are analyzed. The core enabling technologies and the standardized collaborative collision avoidance interaction process are elaborated. Finally, future research directions such as 3D beam management, intelligent interference coordination, and spectrum policy are discussed, providing a theoretical reference for the construction of low-altitude safety communication systems.

Key words: low-altitude safety, collaborative collision avoidance, sidelink communication.