时延有界的PD-NOMA物联网高可靠接入算法

doi:10.11959/j.issn.1000-436x.2020189

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 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 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/Abstract

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

中图分类号:

TP929.5

徐朝农,吴建雄,徐勇军. 时延有界的PD-NOMA物联网高可靠接入算法[J]. 通信学报, 2020, 41(9): 210-221.

Chaonong XU,Jianxiong WU,Yongjun XU. Highly reliable access algorithm for PD-NOMA based IoT with delay guarantee[J]. Journal on Communications, 2020, 41(9): 210-221.

图/表 11

图1

表1

本文主要变量的定义"

符号	含义
Y	基站处接收到的信号
U_i	用户i
G_i	用户i到基站的信道增益
p_i	用户i的发送功率
X_a，X_b	Alice和Bob发送的符号，只能取{-1,1}
A_i	用户i的归一化接收幅度
${\hat{A}}_{i}$	用户i的最大归一化接收幅度
BE(A_a,A_b)	Alice和Bob的归一化接收幅度为A_a和A_b时的传输位错误数
BER(A_a,A_b)	Alice和Bob的归一化接收幅度为A_a和A_b时的传输位错误率
$A_{\cdot \| A_{a}}$	给定A_a的条件下，使BER(A_a,A_b)最小的A_b值
$\tilde{A_{b \| {\hat{A}}_{a}}}$	$A_{\cdot \| A_{a}}$ 与 $A_{\cdot \| A_{a}}$ 的最小值
$б^{2}$	噪声功率
P((X_a=1\|(0,0))	Alice和Bob同时传输数据位0时，基站错误解码Alice数据位的概率
L	最大帧长
t_i	用户i的被调度时槽序号
$x_{j_{1}, \dots, j_{k}}^{(m)}$	用户j₁,…,j_k在时槽m上同时传输时的位错误数

表1

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时延有界的PD-NOMA物联网高可靠接入算法

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

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