LoRaWAN is a
low power wide area network technology designed for internet of things (IoT) applications in urban and other environments. The network in Urban ICT Arena is supplied by RISE ICT and operates in the open frequency band around 868 MHz with bit rates from 0.25 to 11 kbit/s depending on reach and load. The battery lifetime for a sensor lasts several years, but it depends heavily on the sampling frequency. Data is encrypted from the sensor to the end user.
LoRaWAN is built
to be highly scalable. There are many suppliers of sensors, and certified devices should guarantee interoperability. The sensors used in Urban ICT Arena are indoor sensor modules (measuring temperature, humidity, light, motion, and CO2 concentration simultaneously) and outdoor sensors (temperature, humidity, acceleration, and light). There are many other types of sensors and development kits commercially available including modules that can connect to a detector with analogue, digital or pulsed output – which means basically any sensor can be added.
The distance between
a sensor and an antenna is up to 10 km, but somewhat less in a city. However, the signal penetrates buildings and can be used for both smart building and smart city applications. Read more about the LoRaWAN system deployed in Kista.
In Urban ICT Arena
the LoRa systems are connected via optical fiber to an IoT platform at RISE ICT in Hudiksvall. This ensures that users can access the collected data without needing their own servers or communication channels.