RobotWorld

How 5G Cell Towers Could Become the World's Largest Drone Detection Network

By RobotWorld·11/3/2026

There are hundreds of thousands of cell towers already installed across America's cities, highways, and industrial corridors. Most people walk past them without a second thought — they deliver a phone call, stream a video, and that's that. But Ericsson is working on something that could fundamentally change what that infrastructure is capable of: using existing 5G towers to detect drones flying overhead, even when those drones have no radio connection to the network whatsoever.

It's a concept that sounds almost too elegant to be true. Let's break down what's actually happening — and why it matters for the rapidly expanding world of commercial drone operations.

The Problem: Airspace Is Getting Crowded

Drone adoption is accelerating across virtually every commercial sector. Agricultural operators use UAVs for precision spraying and crop monitoring. Logistics companies are piloting last-mile delivery by air. Infrastructure inspectors deploy drones over power lines, pipelines, and wind farms. Emergency responders rely on aerial imagery when every second counts.

The challenge is that this surge in drone activity is outpacing the systems designed to manage it. Traditional drone detection relies on dedicated radar units, radio frequency (RF) scanners, acoustic sensors, or optical cameras — all of which require their own hardware, installation, maintenance, and power supply. Deploying that kind of infrastructure at scale is expensive, and there are enormous geographic gaps where no detection capability exists at all.

Ericsson's Approach: Passive Detection Using Radio Signals

What Ericsson is investigating is fundamentally different. A 5G base station constantly broadcasts and receives radio signals as part of its normal operation. When a physical object — like a drone — passes through those radio waves, it causes subtle but measurable disturbances in the signal environment. Think of it like ripples spreading across a pond when you drop a stone: the interference pattern reveals that something is there, even if that something isn't actively communicating with anyone.

This is sometimes referred to as passive radar or radio frequency sensing. The tower isn't pinging the drone with a dedicated detection beam. Instead, it's analyzing changes in its own ambient signal environment to infer the presence and movement of objects in the airspace above it.

Because the towers are already there, already powered, and already connected to backhaul networks, the marginal cost of adding this sensing capability is primarily in software, signal processing, and AI-driven analysis — not new hardware deployment.

What Makes This Technically Challenging

Detecting a drone using cellular signals isn't trivial. A small consumer quadcopter — even a capable one like the DJI Mini 4 Pro, which weighs under 249 grams — has a very small radar cross-section. Distinguishing its signal signature from birds, wind-blown debris, or other RF interference requires sophisticated machine learning models trained on a wide variety of flight profiles and environmental conditions.

Enterprise drones like the Autel EVO Max 4T or the DJI Mavic 3 Enterprise are larger and carry more metal mass, which theoretically makes them easier to detect passively — but the signal processing challenge remains significant at altitude and range.

The geometry of 5G networks actually helps here. Unlike a single radar installation with one vantage point, a cellular network offers overlapping coverage from multiple towers. By fusing signals from several base stations simultaneously, a detection system can triangulate position and track movement across a much wider area than any single sensor could achieve alone.

What This Means for Drone Airspace Management (UTM)

If this technology matures, the implications for Unmanned Traffic Management (UTM) are substantial. Today's UTM frameworks rely heavily on cooperative tracking — drones broadcasting their position via Remote ID, GPS telemetry links, or ATC transponders. Non-cooperative detection (finding drones that aren't broadcasting anything) is far more difficult and expensive.

A nationwide 5G sensing layer would give airspace managers a passive, continuous picture of low-altitude aerial activity without requiring every drone to carry additional hardware or maintain a network connection. That's enormously valuable for:

  • Geofencing enforcement around airports, hospitals, and critical infrastructure
  • Logistics corridor management for urban air mobility and delivery networks
  • Emergency response — knowing quickly whether an unknown aircraft is operating in a disaster zone
  • Agricultural and industrial zone monitoring where large areas need oversight without permanent sensor installation

The Road Ahead

Ericsson's work is still in the research and development phase, and there are meaningful hurdles to clear before this becomes operational infrastructure. Regulatory frameworks for using cellular networks as sensing platforms will need to be developed. False positive rates — mistaking a bird or a weather balloon for a drone — must be driven low enough to be operationally useful. Privacy considerations around what level of aerial surveillance is appropriate in civilian spaces will also need public and legislative input.

Still, the core concept represents a genuinely smart use of sunk infrastructure costs. Instead of asking cities and industries to fund entirely new sensor networks, the question becomes: how much more can we do with what's already built?

For the commercial drone industry — operators flying inspection drones, agricultural UAVs, or delivery payloads — this signals a future where low-altitude airspace is increasingly monitored, mapped, and managed. That's not a threat to responsible operators; it's the foundation for safely scaling the operations that make commercial UAVs economically viable in the first place.

The cell tower outside your office might soon be doing a lot more than handling your video calls. It might be watching the skies, too.

Interested in enterprise drone platforms built for the next era of managed airspace? Explore our range of professional UAVs and edge-AI solutions — or get in touch with our team to discuss your operational requirements.

References

This article was drafted with AI assistance and reviewed before publishing.

Related reading