关键词: LoRa技术, 中继传输, 通信协议, 单跳

Abstract: Aiming at the problems of unreliable communication between gateway and cloud due to incomplete cellular network coverage and high cost of network cable deployment encountered by single Lora gateway products in underground tunnel deployment, a communication method applied to data relay transmission between gateway products isdesigned and implemented from the perspective of application. This method can support normal data interaction as well as report abnormal terminals in a relatively timely manner,and can also avoid the backlog of gateway data, which to a certain extent solves the problem of gateway deployment in a tunnel environment and improves the applicability of Lora products. Experimental results verify the feasibility of this communication method.

Key words: LoRa technology, relaytransmission, communication protocol, single-hop