6G • RAN
Ambient IoT
Ambient Internet of Things / Zero-Energy Devices
Ultra-low-cost, battery-free sensors that harvest energy from ambient RF, solar, or thermal sources and communicate via backscatter modulation.
Technical Explanation
Ambient IoT enables trillion-node connectivity for supply chain assets, perishable foods, smart packaging, and environmental sensors without battery maintenance or e-waste. Ambient IoT devices power their microchips exclusively by harvesting ambient electromagnetic waves from cellular towers, Wi-Fi, light, or temperature differentials. They transmit sensor readings by modulating the reflection coefficient of an antenna (backscatter communication), requiring micro-watts or nano-watts of power.
Key Functions
- Battery-free, zero-maintenance operation spanning decades without replacement
- Harvesting operating energy from ambient RF, ambient light, vibration, or thermal gradients
- Backscatter transmission modulating reflections of ambient cellular carrier waves
- Sub-cent manufacturing cost enabling ubiquitous deployment on everyday retail items
- Native 3GPP protocol support for automated device discovery, addressing, and security
Specifications
3GPP Rel-19 TS 22.840 (Ambient IoT), Rel-20 Work Item, ITU-R M.2160
Interfaces
Backscatter-UuAmbient-Air6G-Discovery
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