Research and Implement of Just-In-Time Dual Buffer-Queues in LoRaWAN Gateways

Firstly, giving an overview of LoRa wireless communication technology and LoRaWAN specification based on this technology. In view of the problem that the capacity of the LoRaWAN is seriously restricted by the gateway's throughput under actual deployment, introducing a dual buffer-queues structure based on JIT (Just-In-Time) scheduling into the gateway. By this means, the probability of threads blocking in the gateway is reduced, and the working efficiency of the gateway is improved, thereby optimizing the capacity to forward downlink data of the gateway. Experiments done in this paper have proved that the throughput of the gateway using this JIT dual buffer-queues mechanism is significantly enhanced and is more suitable for Class C packets forwarding, which effectively solves the actual deployment problem for LoRaWAN such as low network capacity caused by different types of nodes and gateway paralysis caused by sudden increase in downstream traffic.