LoRaWAN中的公平数据速率分配和传输功率控制  

Fair data rate allocation and transmission power control in LoRaWAN

作　　者：林浩男 王海 郭雅娟 孙云晓 朱道华 毛明禾[1] LIN Haonan;WANG Hai;GUO Yajuan;SUN Yunxiao;ZHU Daohua;MAO Minghe(School of Computer and Information,Hohai University,Nanjing 211100,China;State Grid Jjangsu Elecric Power Co.,Ltd.,Research Institute,Nanjing 211103,China)

机构地区：[1]河海大学计算机与信息学院,江苏南京211100 [2]国网江苏省电力有限公司电力科学研究院,江苏南京211103

出　　处：《电力工程技术》2020年第4期150-156,共7页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(61701167)。

摘　　要：文中对LoRaWAN单元内节点之间的数据速率公平性进行了研究。LoRaWAN数据提取速率不公平的原因在于:(1)分配给节点的数据速率不合理;(2)距离问题,LoRa/LoRaWAN表现出捕获效果,仅提取冲突信号中的较强信号。为解决上述问题,文中提出一种公平自适应数据速率分配和功率控制方案。通过在一个单元内部署每个数据速率的最公平比率并控制传输功率,降低捕获效果,无论其与网关之间的距离如何,都可以进行公平的数据提取。数值仿真结果表明,与现有的最新技术相比,文中方法在数据提取速率上实现了更高的公平性。同时,该方法可以不使用过高的传输功率来维持节点的生命周期,从而降低整个传输系统的整体能耗,符合绿色通信的理念。Fairness of data rates among nodes within a LoRaWAN cell is studied. The reasons why the LoRaWAN data extraction rate is unfair are: firstly,the data rate allocated to the nodes is unreasonable;secondly,because of the distance problem,LoRa/LoRa WAN shows a capture effect,where only the stronger signal in the collision signals is extracted. In order to solve the above problems,a fair adaptive data rate allocation and power control scheme is proposed. By deploying the fairest ratio of each data rate and controlling the transmission power in a cell,the capture effect is reduced,and fair data extraction is possible regardless of the distance between them and the gateway. Numerical simulation results show that compared with the latest technology,the method in this paper achieves higher fairness in data extraction rate. At the same time,the proposed method can maintain the life cycle of the node without excessive transmission power,thus reducing the overall energy consumption of the entire transmission system,in line with the concept of green communication.

关 键 词：LoRaWAN LoRa 公平自适应数据速率 传输功率控制 扩频因子 

分 类 号：TM73[电气工程—电力系统及自动化]