文章摘要
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
投稿时间:2020-04-01  修订日期:2020-06-10
DOI:
中文关键词: LoRaWAN  LoRa  公平自适应数据速率  传输功率控制  扩频因子
英文关键词: LoRaWAN  LoRa  Fair Adaptive Data Rate  Transmission Power Control  Spreading Factor
基金项目:2019年国网江苏省电力有限公司科技项目(J2019051)、国家自然科学基金项目(61701167)
作者单位E-mail
林浩男 河海大学 171828195@qq.com 
王海 国网江苏电力有限公司电力科学研究院  
郭雅娟 国网江苏电力有限公司电力科学研究院  
孙云晓 国网江苏电力有限公司电力科学研究院  
朱道华 国网江苏电力有限公司电力科学研究院  
毛明禾 河海大学  
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中文摘要:
      本文对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:一是分配给节点的数据速率不合理;二是由于距离问题,LoRa/LoRaWAN表现出捕获效果,其中仅提取冲突信号中的较强信号。为解决上述问题,本文提出了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,从而降低捕获效果,无论它们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,本文的方法在数据提取速率上实现了更高的公平性。同时,本文的方法可以不使用过高的传输功率来维持节点的生命周期,因而降低了整个传输系统的整体能耗,符合绿色通信的理念。
英文摘要:
      In this paper, the fairness of data rates among nodes within a LoRaWAN cell is studied. The reasons why the LoRaWAN data extraction rate is unfair are: first, the data rate allocated to the nodes is unreasonable; second, because of the distance problem, LoRa / LoRaWAN shows a capture effect, where only the stronger signal in the collision signals is extracted. In order to solve the above problems, in this paper, 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 method in this paper 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.
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