5G网络时敏业务的时延特性分析

doi:10.11959/j.issn.2096-3750.2022.00298

物联网学报 ›› 2022, Vol. 6 ›› Issue (4): 93-103.doi: 10.11959/j.issn.2096-3750.2022.00298

5G网络时敏业务的时延特性分析

曹建宇¹, 冯伟², 葛宁²

¹ 桂林电子科技大学计算机与信息安全学院，广西桂林 541004
² 清华大学电子工程系，北京 100084

修回日期:2022-09-04 出版日期:2022-12-30 发布日期:2022-12-01
作者简介:曹建宇（1987- ），男，博士，桂林电子科技大学副研究员，主要研究方向为智能无线通信、移动确定性网络、排队理论等
冯伟（1982- ），男，博士，清华大学研究员，主要研究方向为广域通信、机器通信等
葛宁（1971- ），男，博士，清华大学研究员，主要研究方向为通信片上系统、短距离无线通信、宽带无线网络等
基金资助:
国家重点研发计划(2020YFA0711301);国家自然科学基金资助项目(61922049);国家自然科学基金资助项目(61941104)

Delay characteristics of time-sensitive services in 5G networks

Jianyu CAO¹, Wei FENG², Ning GE²

¹ School of Computer Science and Information Security, Guilin University of Electronic Technology, Guilin 541004, China
² Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Revised:2022-09-04 Online:2022-12-30 Published:2022-12-01
Supported by:
The National Key Research and Development Program of China(2020YFA0711301);The National Natural Science Foundation of China(61922049);The National Natural Science Foundation of China(61941104)

摘要/Abstract

摘要：

面向工业应用，5G 接入网需要同时支持时敏与非时敏业务。两类业务共享无线资源和缓冲队列，常导致时延的复杂耦合与不确定。针对ON-OFF时敏业务与非时敏业务共存场景，基于二阶级联排队模型，建立包含排队时延的随机时延特性计算方法，得到时敏业务的时延均值、标准差、越界概率与概率分布。在此基础上，分析非时敏业务对时敏业务随机时延特性的影响。实验表明，非时敏业务对ON-OFF时敏业务随机时延特性的影响与ON-OFF阶段的轮换频率相关；ON-OFF时敏业务时延的概率分布与伽马分布的右拖尾长度近似相等。

关键词: 5G, 时敏业务, 随机时延特性, 级联排队模型

Abstract:

For industrial applications, the time-sensitive services (TSS) and non TSS need to share the radio resources and the same buffer queue in 5G radio access network (RAN).This incurs the complex coupling and uncertainty of the delays.Considering the scenario where ON-OFF TSS and non TSS coexist, the calculation methods for the random delay (including queueing delay) characteristics were established based on the two-stage tandem queueing model, to obtain the mean value, standard deviation, bound violation probability and probability distribution of the delay of TSS.On this basis, the influence of non TSS on the random delay characteristics of TSS was analyzed.It is shown that the influence of non TSS on the random delay characteristics of ON-OFF TSS is related to the rotation frequency of ON-OFF stages.Moreover, the delay probability distribution of ON-OFF TSS has approximately the same right tail length as Gamma distribution.

Key words: 5G, time-sensitive service, random delay characteristic, tandem queueing model

中图分类号:

TN91

曹建宇, 冯伟, 葛宁. 5G网络时敏业务的时延特性分析[J]. 物联网学报, 2022, 6(4): 93-103.

Jianyu CAO, Wei FENG, Ning GE. Delay characteristics of time-sensitive services in 5G networks[J]. Chinese Journal on Internet of Things, 2022, 6(4): 93-103.

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时延边界/ms	时延的累积概率
	计算方法	仿真方法（置信水平：98%）
	计算方法	概率值	置信区间
5	0.147 9	0.147 8	[0.147 5, 0.148 1]
10	0.429 4	0.429 1	[0.428 6, 0.429 7]
15	0.851 4	0.851 3	[0.851 0, 0.851 7]
20	0.982 1	0.982 1	[0.981 9, 0.982 2]
25	0.998 3	0.998 3	[0.998 2, 0.99 83]
30	0.999 89	0.999 90	[0.999 89, 0.999 90]

参数	取值
λ₁/（DAUs·ms^-1）	6
μ₁/（DAUs·ms^-1）	7
μ/（DAUs·ms^-1）	10
N₁, N₂ /DAU	20
τ ₁, τ ₀	1 ms, 5 ms, 50 ms, 100 ms, 500 ms, 1 s, 10 s, 20 s, 30 s, 40 s, 50 s, 60 s
λ₂₁/（DAUs·ms^-1）	0, 1, 2, 3, 4, 5, 6, 7, 8, 9
λ₂₀/（DAUs·ms^-1）	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
注：τ₁=τ₀；N₁=N₂；离散时间间隔?t=0.05 ms，DAU 表示数据单元（data unit）。

5G网络时敏业务的时延特性分析

Delay characteristics of time-sensitive services in 5G networks

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