Design and optimization of LoRa wireless network control strategy for container ship

LoRaWAN is a good choice of IoT（The Internet of Thing） communication on container ships because of its strong anti-interference capability, good scalability, low power consumption and wide coverage. This paper analyzes the ADR（Adaptive Data Rate） algorithm of LoRaWAN in depth to solve the problems of data collision and excessive power consumption when large scale node deployment happens in a wireless network. The simulation tool NS-3 and the LoRaWAN module are used to perform the simulation of the ADR algorithm. The network in simulation is configured according to the technical data from a 21 000 TEU container ship. The simulation shows that the best result is achieved when R_PD（Packet Delivery Ratio） is set as 0.85 under the condition of 3 000 cold boxes. The power consumption in the circumstance is 350 mJ, a great improvement.