基于LoRa的物联网数据传输系统研究与设计  

Research and design of internet of things data transmission system based on LoRa

作　　者：严朝阳 方飞[2] 曹傧[1] 谭歆[1] YAN Zhaoyang;Fang Fei;CAO Bin;TAN Xin(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China;Academy of Physics and Telecommunication Engineering,Neijiang Normal Univesity,Neijiang 641100)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]内江师范学院物理与电子信息工程学院,四川内江641100

出　　处：《重庆邮电大学学报（自然科学版）》2021年第3期354-363,共10页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市“科技创新领军人才支持计划”(cstccxljrc201710);重庆市基础科学与前沿技术研究重点项目(cstc2017jcyjBX0005);四川教育厅重点项目(17ZA0222)。

摘　　要：提出了一种基于LoRa技术的物联网数据传输系统。以物联网中广泛使用的无线传感器网络的数据传输实际需求为研究对象,综合考虑传输系统实际工作环境及经济成本,传输距离,可靠性等问题,设计出一种以LoRa无线传输技术构成的星型网络,能为用户提供一种简单的能实现远距离、易扩展的数据传输系统。介绍了系统网络拓扑结构、系统软硬件设计和自定义通信协议的设计过程。其中,LoRa终端节点内嵌Contiki嵌入式专用操作系统,有效减少用户定义多线程多任务对内存的消耗,节点采用循环队列缓冲的数据通信,具有封装成帧、确认回复、周期性休眠等功能。异构网关负责存储转发并且支持NB-IoT,WiFi等多种通信技术上传至远端云平台,在远端云平台可以配置并显示终端节点信息。对系统进行了功能和性能测试,达到了预期目标,具有一定的应用价值。This paper proposes an internet of things data transmission system based on LoRa technology.Taking the actual data transmission requirements of wireless sensor networks widely used in the internet of things as the research object,considering the actual working environment and economic cost,transmission distance and reliability of the transmission system,we design a star network composed of LoRa wireless transmission technology.The network can provide users with a simple data transmission system that can realize long-distance and easy expansion.The design process of system network topology,system hardware and software design and custom communication protocol is introduced.Among them,the LoRa terminal node embeds the Contiki embedded dedicated operating system,which effectively reduces the consumption of memory by the user-defined multi-thread multi-tasking.The node uses the data communication of the circular queue buffer,and has the functions of encapsulation framing,confirmation reply,periodic sleep,and the like.The heterogeneous gateway is responsible for store-and-forward and supports various communication technologies such as NB-IoT and WiFi to upload to the remote cloud platform.The remote cloud platform can configure and display terminal node information.Finally,the system is tested for function and performance,which achieves the expected goal and has certain application value.

关 键 词：LoRa技术 物联网数据传输 Contiki 

分 类 号：TN92[电子电信—通信与信息系统]