Dynamic Switching in LoRaWAN under multiple Gateways and Heavy Traffic Load

The classic ADR method used by LoRa for optimizing data rates, airtime and energy consumption in the network has proven to be not very efficient in scenarios characterized by a high number of transmitting nodes. There is therefore a need to implement alternative mechanisms to reduce collisions and packet transmission delay in high dense IoT network scenario with increasing traffic load. The research presented in this paper contributes to satisfy this need by proposing a new mechanism aimed at traffic load balancing that leverages the switching of LoRa devices between Gateways in a multi-Gateway scenario. From the comparison with the classic ADR it clearly emerges how the proposed technique can obtain significantly better performance levels in terms of number of collisions, energy consumption and packet delay.