A multi-channel lorawan gateway downlink scheduling method

Abstract

The invention discloses a multi-channel LoRaWAN gateway downlink scheduling method. In view of the problems such as the easy collision of downlink data sent by the gateway and the long delay in sending Class C type downlink data when the number of downlink communications in the LoRaWAN network is large, the downlink data is judged according to the timestamp. For the type of data, select the appropriate downlink queue, determine whether the data can be inserted into the queue, and use different radio frequency channels for transmission; for the downlink data of Class A and Class B types, determine whether it can be inserted into the queue according to the timestamp; For downlink data, find a suitable position to insert data in the downlink queue to be inserted; for downlink data that fails to enter the queue, randomly select other downlink queues, and try to insert the queue again until a downlink queue that can be inserted is found or the data is discarded.

Description

technical field [0001] The invention belongs to the technical field of low-power wide area network communication, and in particular relates to a multi-radio frequency channel LoRaWAN gateway downlink communication scheduling technology. Background technique [0002] As a long-distance, low-power, low-cost IoT technology, LoRaWAN is widely used in IoT scenarios where a large number of devices are connected. For IoT scenarios with massive devices, two important parameters are communication reliability and network capacity. [0003] For communication reliability, the impact of massive devices is mainly reflected in the conflict during data transmission. In the research of the existing LoRaWAN network, various schemes are proposed to reduce the collision probability of uplink communication, such as optimizing the channel allocation method, improving the ADR strategy, and improving the collision avoidance method. However, the optimization of the probability of the downlink comm...

AI Technical Summary

Problems solved by technology

[0004] Regarding network capacity, a single LoRaWAN gateway can support uplink communication of tens of thousands of terminal nodes, but considering downlink communication at the same time, the capacity of the gateway will be greatly reduced, and there is currently no effective measure to increase the device capacity of the gateway

[0005] Therefore, the downlink communication of the LoRaWAN network has become the main reason for limiting the reliability of network communication and network capacity.

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