LoRa在合法性演进中的时间同步:多网关场景下的移动感知  

Time Synchronization of Emerging Technology LoRa in the Evolution of Legitimacy:Mobility Awareness in Multi-Gateway Scenarios

作　　者：丁奕文 鲁若愚[1] 周冬梅[1] DING Yiwen;LU Ruoyu;ZHOU Dongmei(School of Management and Economics,University of Electronic Science and Technology of China ,Chengdu 611731)

机构地区：[1]电子科技大学经济与管理学院,成都611731

出　　处：《电子科技大学学报》2023年第2期224-231,共8页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金面上项目(72272023)。

摘　　要：在现有的LoRa时间同步工作中,LoRa网关周期性地将同步报文广播到固定位置的终端设备。然而,这些方法往往忽略了不同终端设备具有不同的时钟偏移,且在多网关场景下无法保证时间同步的可靠性。为此,提出了多网关场景下的LoRa网络时间同步方法,通过同步时间和扩频因子的选择提高同步精度,并提出了移动感知的自适应算法,以解决跨网关的终端设备移动性的影响。在真实LoRa环境和仿真环境的实验结果表明,与现有工作相比,该方法可将LoRa网络的时间同步精度提高60.43%。In this paper,we propose a mobility-aware time synchronization method for multi-gateway LoRa networks.By jointly considering the selection of synchronization timing and spreading factors for both end devices and gateways,the synchronization accuracy is improved and energy consumption is reduced.This paper also proposes a mobility-aware adaptation algorithm to address the impact of end device mobility across multiple gateways.The experiments based on both LoRa testbed and simulations reveal that the proposed method can improve the synchronization accuracy by 60.43%compared with the state-of-the-art works.This paper also discusses the future directions such as transmission scheduling and the legitimacy evolution.

关 键 词：物联网 LoRa网络 移动性 时间同步 

分 类 号：TN915[电子电信—通信与信息系统]