通信学报 ›› 2018, Vol. 39 ›› Issue (11): 70-79.doi: 10.11959/j.issn.1000-436x.2018228

• 学术论文 • 上一篇    下一篇

窄带物联网覆盖类别更新机制性能分析与优化

简鑫,刘钰芩,韦一笑,宋健,王芳,付澍,谭晓衡   

  1. 重庆大学微电子通信工程学院,重庆 400044
  • 修回日期:2018-07-23 出版日期:2018-11-01 发布日期:2018-12-10
  • 作者简介:简鑫(1987?),男,四川自贡人,博士,重庆大学副教授,主要研究方向为应用统计数学、物联网无线接入技术及应用等。|刘钰芩(1991?),女,四川南充人,重庆大学硕士生,主要研究方向为窄带物联网、群智感知技术等。|韦一笑(1993?),女,广西河池人,重庆大学硕士生,主要研究方向为窄带物联网、物联网超低功耗技术等。|宋健(1995?),男,江西宜春人,重庆大学硕士生,主要研究方向为智慧网络、群体智能等。|王芳(1995?),女,四川泸州人,重庆大学硕士生,主要研究方向为无线通信理论与技术、分布式队列随机接入等。|付澍(1985?),男,贵州贵阳人,博士,重庆大学讲师,主要研究方向为未来网络、边缘计算等。|谭晓衡(1976?),男,重庆人,博士,重庆大学教授、博士生导师,主要研究方向为下一代移动通信、通信信号处理等。
  • 基金资助:
    国家自然科学基金资助项目(61501065);国家自然科学基金资助项目(61571069);国家自然科学基金资助项目(61601067);国家自然科学基金资助项目(61701054);重庆市基础科学与前沿技术研究专项基金资助项目(cstc2016jcyjA0021);中央高校基本科研业务费基金资助项目(106112017CDJQJ168817);中央高校基本科研业务费基金资助项目(2018CDXYTX0009);中央高校基本科研业务费基金资助项目(2018CDYJSY0055)

Performance analysis and optimization for coverage classes updating mechanism of narrow-band internet of things

Xin JIAN,Yuqin LIU,Yixiao WEI,Jian SONG,Fang WANG,Shu FU,Xiaoheng TAN   

  1. College of Microelectronics and Communication Engineering,Chongqing University,Chongqing 400044,China
  • Revised:2018-07-23 Online:2018-11-01 Published:2018-12-10
  • Supported by:
    The National Natural Science Foundation of China(61501065);The National Natural Science Foundation of China(61571069);The National Natural Science Foundation of China(61601067);The National Natural Science Foundation of China(61701054);Chongqing Research Program of Basic Research and Frontier Technology(cstc2016jcyjA0021);Fundamental Research Funds for the Central Universities(106112017CDJQJ168817);Fundamental Research Funds for the Central Universities(2018CDXYTX0009);Fundamental Research Funds for the Central Universities(2018CDYJSY0055)

摘要:

以覆盖类别为状态变量建立了窄带物联网(NB-IoT,narrow-band internet of things)覆盖类别更新机制的马尔可夫链模型,给出了平均接入失败概率和平均功耗的优化模型及求解办法,分析了前导码重复次数、系统负载、全局最大传输次数对各覆盖类别最大传输次数最优取值的影响。数值分析表明:常规覆盖类别和扩展环境覆盖类别的最大传输次数对系统性能影响较大,最大传输次数取值范围应分别控制在[1,5]和[1,7]之间;极端环境覆盖类别的最大传输次数对系统性能影响不大,可取[1,10]之间的任意值,建议取值为1;所提的引入覆盖类别回退机制的覆盖类别更新机制的平均功耗比协议模型低约95%。

关键词: 窄带物联网, 随机接入, 覆盖增强, 覆盖类别, 马尔可夫链

Abstract:

A Markov chain model with coverage classes as state variables was established to describe the dynamics of the coverage classes updating mechanism of narrow-band internet of things (NB-IoT).An optimization model to minimize average probability of access failure as well as average power consumption was formulated,with which the effects of preamble repetition number,system load and global maximum transmission number on the optimal configuration of maximum transmission number of each coverage class was analyzed.Numerical analysis results show that the maximum transmission number of normal coverage and extended coverage have a great influence on the system performance and their value ranges should be set within[1,5]and[1,7]respectively.However,the maximum transmission number of extreme coverage has little influence on the system performance,its value could be any one in[1,10]but the recommended value is 1.In addition,the average power consumption of the model that introduced coverage classes’ rollback mechanism is about 95% lower than the model proposed by 3GPP.

Key words: NB-IoT, random access, coverage enhancement, coverage classes, Markov chain

中图分类号: 

  • TN929.5