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Frontiers of Information Technology & Electronic Engineering

ISSN 2095-9184 (print), ISSN 2095-9230 (online)

Intelligent radio access networks: architectures, key techniques, and experimental platforms

Abstract: Intelligent radio access networks (RANs) have been seen as a promising paradigm aiming to better satisfy diverse application demands and support various service scenarios. In this paper, a comprehensive survey of recent advances in intelligent RANs is conducted. First, the efforts made by standard organizations and vendors are summarized, and several intelligent RAN architectures proposed by the academic community are presented, such as intent-driven RAN and network with enhanced data analytic. Then, several enabling techniques are introduced which include AI-driven network slicing, intent perception, intelligent operation and maintenance, AI-based cloud-edge collaborative networking, and intelligent multi-dimensional resource allocation. Furthermore, the recent progress achieved in developing experimental platforms is described. Finally, given the extensiveness of the research area, several promising future directions are outlined, in terms of standard open data sets, enabling AI with a computing power network, realization of edge intelligence, and software-defined intelligent satellite-terrestrial integrated network.

Key words: Intelligent network architecture; Artificial intelligence; Experimental platforms

Chinese Summary  <37> 高速列车荷载作用下的有砟轨道动应力分析

作者:胡静1,边学成2,3
机构:1福州大学,土木工程学院,中国福州,350108;2浙江大学,建筑工程学院,中国杭州,310058;3浙江大学,软弱土与环境土工教育部重点实验室,中国杭州,310058
目的:研究高速列车荷载作用下有砟轨道路基和地基内部的动应力特征。
创新点:1.推导有砟轨道的2.5维有限元求解方程。2.从应力的角度出发,确定已有分析模型适用的列车速度范围。3.揭示轨道不平顺对路基和地基内部应力大小和应力路径的重要作用。
方法:1.基于2.5维有限元理论推导出有砟轨道的动力控制方程(公式(20))。2.利用秦沈客运专线的现场测试结果验证模型的准确性(图5)。3.基于验证后的模型,分析列车速度、扣件性能及轨道不平顺对动应力的影响。
结论:1.Boussinesq解无法考虑列车速度和实际路基结构对应力的影响。2.平顺轨道模型只适用于列车速度不超过100km/h的情况。3.轨道不平顺不仅会增大动应力的强度还会引起多次主应力旋转,使得土体更加容易被破坏。

关键词组:有砟轨道;应力分析;轨道不平顺;应力路径;高速列车


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DOI:

10.1631/FITEE.2100305

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On-line Access:

2022-01-24

Received:

2021-06-29

Revision Accepted:

2022-04-22

Crosschecked:

2021-10-19

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