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计算机工程 ›› 2019, Vol. 45 ›› Issue (9): 95-99,118. doi: 10.19678/j.issn.1000-3428.0051948

• 移动互联与通信技术 • 上一篇    下一篇

LoRa无线网络MAC层TDMA时隙分配协议研究

李民政1,2,3, 资文彬2, 王浩2   

  1. 1. 上海电机学院 电子信息学院, 上海 201306;
    2. 桂林电子科技大学 计算机与信息安全学院, 广西 桂林 541004;
    3. 广西信息科学实验中心, 广西 桂林 541004
  • 收稿日期:2018-06-27 修回日期:2018-07-29 出版日期:2019-09-15 发布日期:2019-09-03
  • 作者简介:李民政(1972-),男,教授、博士,主研方向为无线传感器网络、物联网应用;资文彬、王浩,硕士研究生。
  • 基金资助:
    国家自然科学基金(61362007);广西信息科学实验中心项目(YB1407);广西可信软件重点实验室基金(KX201414)。

Research on TDMA Time Slot Allocation Protocol in MAC Layer of LoRa Wireless Network

LI Minzheng1,2,3, ZI Wenbin2, WANG Hao2   

  1. 1. School of Electronic and Information, Shanghai Dianji University, Shanghai 201306, China;
    2. School of Computer Science and Information Security, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China;
    3. Guangxi Information Science Research Centre, Guilin, Guangxi 541004, China
  • Received:2018-06-27 Revised:2018-07-29 Online:2019-09-15 Published:2019-09-03
  • Supported by:
    This work is supported by National Key R&D Program of China (No.2016YFB0900604) and Science and Technology Project of SGCC(No.SGTYHT/16-JS-198).

摘要: 轮询协议是一种经典的介质访问控制(MAC)层时分多址(TDMA)时隙分配协议,具有无冲突数据通信且功耗低的特点,但无法保证通信可靠性及实现有区别服务。为此,研究一种具有动态重传和差异服务机制的TDMA时隙分配协议。重新设计帧结构,根据终端节点数据包信息完成静态时隙分配,在数据传输失败时,利用重传时隙提高通信可靠性,通过影子时隙实现有区别服务。在无线抄表系统上的实验结果表明,与经典轮询协议相比,该协议的丢包率降低了3%。

关键词: LoRa无线网络, 介质访问控制层, 时分多址, 时隙分配, 无线抄表

Abstract: The polling protocol is a classic Media Access Control(MAC) layer Time Division Multiple Access(TDMA) time slot allocation protocol,which has the characteristics of collision-free data communication and low power consumption,but it cannot guarantee communication reliability and realize differential services.Therefore,a TDMA time slot allocation protocol with dynamic retransmission and differential service mechanisms is studied.The frame structure is redesigned,and the static time slot allocation is completed according to the information of the terminal node data packet.When the data transmission fails,the retransmission time slot is used to improve the communication reliability,and the differential service is realized by the shadow time slot.Experimental results on the wireless meter reading system show that compared with the classic polling protocol,the packet loss rate of the protocol is reduced by 3%.

Key words: LoRa wireless network, Media Access Control(MAC)layer, Time Division Multiple Access(TDMA), time slot allocation, wireless meter reading

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