A survey covering the key technologies, applications, and open challenges in generating flight trajectories for UAVs that rely on cellular networks for communication, with a focus on maintaining network quality throughout a mission.
Abstract
Unmanned Aerial Vehicles (UAVs) are rapidly being applied to real-world applications, and the communication systems supporting them are moving toward longer range, cheaper solutions, which has driven growing interest in using existing cellular networks for UAV communication. The trajectory and motion planning systems used by cellular-assisted UAVs are a key part of making that work: trajectories must be chosen so the communication system performs well without the UAV's own positioning degrading its cellular link quality.
What the survey covers
- UAV systems background: platform types, use cases, and the regulatory landscape (3GPP Release-15/16/17, ICAO spectrum requirements)
- Cellular-assisted UAV networking: UAVs as a new class of User Equipment, and the unique challenges that come with 3D mobility (altitude limitations, high handover rates, interference)
- Coverage-aware trajectory generation: a comparison of hard-constrained (minimum-snap, QP-based) and soft-constrained generation techniques, and how cellular network quality gets folded into the optimization
- UAV simulation systems: the tools available for evaluating these systems before real-world flight testing
- Open challenges: realistic 3D coverage modeling, mobility management, security, and the reliability/scalability tradeoffs of existing approaches
Why it matters
Beyond Visual Line of Sight (BVLOS) flight is a key milestone for expanding UAV use cases, and cellular networks are one of the few communication options that can plausibly support it at scale and at low cost. This survey exists to consolidate where that research actually stands, since most prior work focuses narrowly on either the networking side or the trajectory-planning side, rarely both together.
Mohammad Hameed, University of Calgary.