SigFox is LPWA connectivity solution, based on patented technology, designed to connect sensors and devices. The advantages of SigFox technology are autonomy, simplicity, cost efficiency, and complementarity.
SigFox is using UNB modulation, 192kHz band. Every message is 100Hz wide, with 100-600bit/s rate.
In Europe SigFox use 868-868.2MHz band, rest of the world – 902-928MHz band.
In the case of SigFox the message emitted is not attached to a certain base station, but can be received by any one of three base stations nearby. The spatial diversity is another function that makes SigFox very attractive.
SigFox network consist of two layers:
• Network equipment layer;
• SigFox support system layer.
Data between the base stations and the SigFox Cloud is sent via backhauling (DSL or 3G-4G technologies). The SigFox Cloud contains back-end servers for monitoring, message processing and performing base station management, and storing functions, messages and modems’ metadata.
The last piece of unique architecture is the web interface and API, that allows customers to access their data.
SigFox networks are characterised with high capacity, which allows the operation of billions of devices. The high capacity is supported by:
• Ultra-narrow band modulation;
• Frequency and time diversity;
• Spatial diversity.
Key SigFox network characteristics:
• High-energy efficiency;
• Large coverage;
• Resistance to interference is very robust in the environment with other signals;
• Default security;