Fast and reliable LoRa-based data transmissions

Autor: Dimitrios Zorbas, Patrick Maillé, Brendan O'Flynn, Christos Douligeris
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Computer science
LoRaWAN configurations
Recently proposed MAC layer protocol
Orthogonal transmissions
02 engineering and technology
Average packet success probability
Stochastic processes
End-devices
0202 electrical engineering
electronic engineering
information engineering
Optimisation
LoRa-based gate-ways
LoRaWAN-based transmissions
Probability
Versatile configuration parameters
Network packet
Optimal SF assignments
Node (networking)
Testbed
SF optimization problem
Physical layer
Access protocols
Mac layer protocol
020206 networking & telecommunications
Scientific attention
Wide area networks
Physical layer characteristics
Fast data delivery
Maximum data collection time window
LoRa-based networks
Radiofrequency interference
Unregulated access
020201 artificial intelligence & image processing
Algorithm
Extensive collisions
Zdroj: 2019 IEEE Symposium on Computers and Communications (ISCC)
ISCC
Popis: LoRaWAN is a recently proposed MAC layer protocol which manages communications between LoRa-based gate-ways and end-devices. It has attracted much scientific attention due its physical layer characteristics, but mainly due to its versatile configuration parameters. However, it is known that LoRaWAN-based transmissions suffer from extensive collisions due to the unregulated access to the medium. For this reason, various techniques that alleviate the burst of collisions have been proposed in the literature. In this paper, we deal with the problem of fast data delivery in LoRa-based networks. We model a network where transmissions follow a Poisson process. We compute the average packet success probability per Spreading Factor (SF) assuming orthogonal transmissions. We, then, formulate an SF optimization problem to maximize the success probability given an amount of data per node and a maximum data collection time window. We show – both theoretically and using simulations – that the overall success probability can be improved by approximately 100% using optimal SF assignments. We validate our findings using a 10-node testbed and extensive experiments. Despite that experiments reveal the existence of inter-SF interference, our solution still provides the best performance compared to other LoRaWAN configurations.
Databáze: OpenAIRE
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