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LORAWAN – A VERY BRIEF INTRODUCTIONJOHAN BERGS

IMEC – IDLAB – UNIVERSITY OF ANTWERP

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AIRBEZEN & CURIEUZENEUZEN - PRO AND CONTRA

ProBoth projects draw the attention of the publicLarge scale (hundreds of ”sensors”)Cheap (good sensors are expensive!)

ContraRelatively short duration (strawberry plants or signs)Labour-intensive (leaves/dust needs to be collected, correctly labeled & analysed)Only long-time average results, but no real-time peaks or periodical information

THIS IS MY PERSONAL OPNINION!

CAN WE HAVE THE BEST OF BOTH WORLDS?

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SOME LORAWAN KEYWORDS

1. Long range2. Low power3. Robustness to interference4. Low Data rate (250 bps – 50 kbps)5. Two-way communication

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ARCHITECTURE

Image source: LoRa Alliance

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ARCHITECTURE

1. Nodes are not associated with a specific gateway2. Gateways simply foward all received packets3. The Network Server contains all complexity

1. Select the optimal gateway for downlink messages2. Set ADR parameters

4. No handovers required for moving devices

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ARCHITECTURE

Image source: LoRa Alliance

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BATTERY LIFETIME

1. Asynchronous communication (send when you want to send – Aloha)1. Sleep for as long as you want2. Wake up and transmit3. Go back to sleep

2. No synchronization needed

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ROBUSTNESS TO INTERFERENCE

Image sources:- http://www.link-labs.com/what-is-lorawan/

- https://revspace.nl/DecodingLora

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DEVICE CLASSES

Image source: LoRa Alliance

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BIDIRECTIONAL COMMUNICATION

Class A

Class B

Class C

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