通信学报 ›› 2020, Vol. 41 ›› Issue (9): 210-221.doi: 10.11959/j.issn.1000-436x.2020189

• 学术通信 • 上一篇    

时延有界的PD-NOMA物联网高可靠接入算法

徐朝农1,吴建雄1,徐勇军2   

  1. 1 中国石油大学(北京)信息科学与工程学院,北京 102249
    2 中国科学院计算技术研究所,北京 100080
  • 修回日期:2020-08-15 出版日期:2020-09-25 发布日期:2020-10-12
  • 作者简介:徐朝农(1975- ),男,安徽巢湖人,博士,中国石油大学(北京)副教授、博士生导师,主要研究方向为工业无线网络、智联网、嵌入式系统|吴建雄(1994- ),男,黑龙江大庆人,中国石油大学(北京)硕士生,主要研究方向为无线通信与网络|徐勇军(1979- ),男,安徽安庆人,博士,中国科学院计算技术研究所研究员、博士生导师,主要研究方向为智联网、大数据技术
  • 基金资助:
    国家自然科学基金资助项目(61702487)

Highly reliable access algorithm for PD-NOMA based IoT with delay guarantee

Chaonong XU1,Jianxiong WU1,Yongjun XU2   

  1. 1 College of information Science and Engineering,China University of Petroleum (Beijing),Beijing 102249,China
    2 Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100080,China
  • Revised:2020-08-15 Online:2020-09-25 Published:2020-10-12
  • Supported by:
    The National Natural Science Foundation of China(61702487)

摘要:

考虑一个基于k阶串行干扰消除的功率域非正交接入的单跳网络,研究在定义功率域非正交多路接入的可靠性模型的基础上,在传输时延有界的前提下,研究如何通过用户组配和功率分配来最大化上行传输的平均可靠性,进而为其提出了一个复杂度为O(nlogn)的启发式算法,其中n是用户数。此外,还证明了该算法在k=2的情况下是最优的。性能评估表明,随着时延的线性增加,传输可靠性将呈指数增长趋势;相对随机组配策略,所提算法会获得明显的可靠性增强。

关键词: 非正交多址接入, 串行干扰消除, 时延, 可靠性, 功率分配

Abstract:

A single-hop PD-NOMA network supporting k-successive interference cancellation (k-SIC) was considered.Given the real-time performance requirements,how to maximize the average reliability of uplink transmissions by the joint users grouping and power allocation was studied.A heuristic algorithm with complexity of O(nlogn) was presented,where n was the number of users.The algorithm was also proved to be the optimal if k=2.The performance evaluations reveal that the transmission reliability will increase exponentially with the linear degradation of the real-time performance guarantee.Besides,the transmission reliability is enhanced with respect to the random users grouping algorithm.

Key words: non-orthogonal multiple access, successive interference cancellation, delay, reliability, power allocation

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