LoRa低成本全双工网关的设计与实现

Design and Implementation of LoRa Low-cost Full-duplex Gateway

LoRa无线技术具有低功耗、网络扩展性强及通信距离远等优点,在广域网中扮演越来越重要的角色。其中以低功耗的优势最为明显,而网络系统的信道利用率极大地影响LoRa节点的功耗。原始LoRa网关上的调制解调模块SX1301是半双工工作模式,收发数据没法同时进行。SX1278模块的成本只有SX1301模块成本的几十分之一,把SX1278模块加到LoRa网关上,用很低的成本使LoRa网关变成全双工工作模式。在实际硬件设备中实现该设计,实验证明此方案改进的LoRa网关可以很好地工作在全双工的工作模式。

LoRa wireless technology has the advantages of low power consumption,strong network scalability and long communication distance,playing an increasingly important role in the WAN.Among them,the advantage of low power consumption is most obvious,and the channel utilization of the network system greatly affects the power consumption of the LoRa node.The modem module SX1301 on the original LoRa gateway works at half-duplex mode,sending and receiving data cannot be performed simultaneously.The cost of the SX1278 module is only a fraction of the cost of the SX1301 module,so the SX1278 module is added to the LoRa gateway to make the LoRa gateway work at full-duplex mode with very low cost.The design is implemented in the actual hardware device.Experiments show that the LoRa gateway improved by this scheme can work well in full-duplex mode.