Study on solutions for Ambient IoT (Internet of Things) in NR
The overall objective of the SI is to study a harmonized air interface design with minimized differences (where necessary) for Ambient IoT to enable the following devices:
- ~1 µW peak power consumption, has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, neither R2D nor D2R amplification in the device. The device’s D2R transmission is backscattered on a carrier wave provided externally.
- ≤ a few hundred µW peak power consumption has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, both R2D and/or D2R amplification in the device. The device’s D2R transmission may be generated internally by the device, or be backscattered on a carrier wave provided externally.
Referring to the definitions in [2, TR 38.848], this is done in the context of:
- Deployment scenario 1 (indoor-to-indoor) with Topology 1, and indoor microcell basestation.
- Deployment scenario 2 (indoor-to-outdoor) with Topology 2 and indoor UE as intermediate node under network control, and outdoor macrocell basestation.
The spectrum considered is FR1 licensed spectrum in FDD, which can be in-band to NR, in guard-band to NR/LTE, or in standalone band(s). The traffic types considered are DO-DTT and DT, focusing on indoor inventory and indoor command representative use cases. The study also assesses whether the harmonized air interface can address the DO-A use case.
Study of the design of energy harvesting signal/waveform is out of scope in Rel-19.