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Edge Intelligence Assisted Resource Management for Satellite Communication

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China Communications 2022年第8期19卷 31-40页

作者： yaohua sun Mugen Peng State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

Satellite communication has been seen as a vital part of the sixth generation communication,which greatly extends network *** satellite communication,resource management is a key problem attracting many research ***,previous study mainly focuses on throughput improvement via power allocation and spectrum assignment and the proposed approaches are mostly model-based and dedicated to specific problem ***,with the trend of edge intelligence,complex resource management problems can be efficiently resolved in a model-free *** this paper,a joint beam activation,user-beam association and time resource allocation approach is *** core idea is using stochastic learning at the ground station to identify active user-link beams to meet user rate *** addition,the convergence,optimality and complexity of our proposal are rigorously *** simulation,it is shown that the rate goal of most of the users can be met and meanwhile satellite energy is saved owing to much less active beams.

关键词： satellite communication resource management stochastic learning

Software defined intelligent satellite-terrestrial integrated networks:Insights and challenges

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Digital Communications and Networks 2023年第6期9卷 1331-1339页

作者： Shuo Yuan Mugen Peng yaohua sun Xiqing Liu The State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

Satellite-Terrestrial integrated Networks(STNs)have been advocated by both academia and industry as a promising network paradigm to achieve service continuity and ***,STNs suffer from problems including poor flexibility of network architecture,low adaptability to dynamic environments,the lack of network intelligence,and low resource *** handle these challenges,a Software defined Intelligent STN(SISTN)architecture is ***,the hierarchical architecture of the proposal is described and a distributed deployment scheme for SISTNs controllers is proposed to realize agile and effective network management and ***,three use cases in SISTNs are ***,key techniques and their corresponding solutions are presented,followed by the identification of several open issues in SISTNs including compatibility with existing networks,the tradeoff between network flexibility and performance,and so on.

关键词： Satellite-terrestrial network Software-defined network Artificial intelligence Reconfigurable networking

Joint Resource Allocation and Admission Control in Sliced Fog Radio Access Networks

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China Communications 2020年第8期17卷 14-30页

作者： Yuan Ai Gang Qiu Chenxi Liu yaohua sun State Key Laboratory of Network and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China LTE&5G Wireless Product R&D Institute ZTE CorporationShenzhen 518057China

Network slicing based fog radio access network(F-RAN) has emerged as a promising architecture to support various novel applications in 5 G-and-beyond wireless networks. However, the co-existence of multiple network slices in F-RANs may lead to significant performance degradation due to the resource competitions among different network slices. In this paper, the downlink F-RANs with a hotspot slice and an Internet of Things(Io T) slice are considered, in which the user equipments(UEs) of different slices share the same spectrum. A novel joint resource allocation and admission control scheme is developed to maximize the number of UEs in the hotspot slice that can be supported with desired quality-of-service, while satisfying the interference constraint of the UEs in the Io T slice. Specifically, the admission control and beamforming vector optimization are performed in the hotspot slice to maximize the number of admitted UEs, while the joint sub-channel and power allocation is performed in the Io T slice to maximize the capability of the UEs in the Io T slice tolerating the interference from the hotspot slice. Numerical results show that our proposed scheme can effectively boost the number of UEs in the hotspot slice compared to the existing baselines.

关键词： NOMA fog radio access networks resource allocation admission control

手机直连低轨卫星通信:架构、关键技术和未来展望

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移动通信 2024年第1期48卷 103-110页

作者：孙耀华许宏涛彭木根北京邮电大学网络与交换技术国家重点试验室北京100876

借助低轨卫星星座全时全域覆盖优势,手机直连卫星通信预期成为6G重要特征之一。首先介绍了手机直连卫星的测试验证、标准化与商业项目发展现状。其次,介绍了基于透明转发、部分可再生处理、完全可再生处理、集成接入和回传的四种手机直... 详细信息

借助低轨卫星星座全时全域覆盖优势,手机直连卫星通信预期成为6G重要特征之一。首先介绍了手机直连卫星的测试验证、标准化与商业项目发展现状。其次,介绍了基于透明转发、部分可再生处理、完全可再生处理、集成接入和回传的四种手机直连低轨卫星网络架构及组网方式。通过分析手机直连低轨卫星网络场景下高移动性与大传输时延等带来的接入与传输问题,提出对地面移动通信体制进行适应性改进的关键技术方案。最后,探讨了未来手机直连低轨卫星发展发向和潜在思路。通过上述阐述与分析,提供未来发展手机直连低轨卫星通信的可行路径。

关键词：低轨卫星通信手机直连卫星卫星网络架构

Performance Analysis in Cloud Radio Access Networks:User-Centralized Coordination Approach

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China Communications 2015年第11期12卷 12-23页

作者： Munzali Ahmed Abana sun yaohua Manzoor Ahmed Lukman A.Olawoyin LI Yong Key Laboratory of Universal Wireless Communication Ministry of EducationBeijing University of Posts and Telecommunications Wireless Communication Center Beijing University of Posts and Telecommunications

The cloud radio access network(C-RAN) has recently been proposed as an important component of the next generation wireless networks providing opportunities for improving both spectral and energy effi ciencies. The performance of this network structure is however constrained by severe inter-cell interference due to the limited capacity of fronthaul between the radio remote heads(RRH) and the base band unit(BBU) pool. To achieve performance improvement taking full advantage of centralized processing capabilities of C-RANs,a set of RRHs can jointly transmit data to the same UE for improved spectral effi ciency. In this paper,a user centralized joint coordinated transmission(UC-JCT) scheme is put forth to investigate the downlink performance of C-RANs. The most important benefit the proposed strategy is the ability to translate what would have been the most dominant interfering sources to usable signal leading to a signifi cantly improved performance. Stochastic geometry is utilized to model the randomness of RRH location and provides a reliable performance analysis. We derive an analytical expression for the closed integral form of the coverage probability of a typical UE. Simulation results confirm the accuracy of our analysis and demonstrate that significant performance gain can be achieved from the proposed coordination schemes.

关键词： cloud radio access network poisson point process coverage probability joint coordinated transmission baseband unit

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

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Frontiers of Information Technology & Electronic Engineering 2022年第1期23卷 5-18页

作者： Zeyu WANG yaohua sun Shuo YUAN State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China

Intelligent radio access networks(RANs)have been seen as a promising paradigm aiming to better satisfy diverse application demands and support various service *** this paper,a comprehensive survey of recent advances in intelligent RANs is ***,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 ***,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 ***,the recent progress achieved in developing experimental platforms is ***,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.

关键词： Intelligent network architecture Artificial intelligence Experimental platforms

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光甘草定的全合成研究

粘接 2024年第10期51卷 9-12页

作者：刘爱云孙耀华王刚柴永海兰州石化职业技术大学应用化学工程学院甘肃兰州730060 陕西师范大学陕西西安710119

光甘草定是光果甘草中一种特有的异黄酮成分,具有广泛的生物活性。以便宜易得的7-羟基香豆素为原料,与2-甲基-3-丁炔-1-氯反应构建酚炔醚,在酚炔醚的α,β-不饱和内酯部分引α-溴原子得到溴代物酚炔醚,该化合物的炔醚部分在加热条件下,... 详细信息

光甘草定是光果甘草中一种特有的异黄酮成分,具有广泛的生物活性。以便宜易得的7-羟基香豆素为原料,与2-甲基-3-丁炔-1-氯反应构建酚炔醚,在酚炔醚的α,β-不饱和内酯部分引α-溴原子得到溴代物酚炔醚,该化合物的炔醚部分在加热条件下,经分子内环化生成关环产物,关环产物与2,4-二甲氧基苯硼酸经Suzuki偶联,还原共轭双键得双羟基化合物、Mitsunobu成醚、脱除甲基,七步以20%的总收率合成了光甘草定,该方法具有原料便宜易得、总路线短、总收率高等优点。

关键词：光甘草定 Szuki偶联反应全合成

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中国省际碳强度空间相关性与统计特征分析

统计与决策 2021年第14期37卷 49-53页

作者：孙耀华深圳职业技术学院管理学院广东深圳518055

文章在对1998—2018年中国各省份碳强度高低进行比较的基础上,构建嵌套空间地理区位和能源资源禀赋双重效应的综合空间权重矩阵,运用探索性空间数据分析方法和ArcGIS技术研究省际碳强度的空间相关性及其统计特征。结果表明,各省份碳强... 详细信息

文章在对1998—2018年中国各省份碳强度高低进行比较的基础上,构建嵌套空间地理区位和能源资源禀赋双重效应的综合空间权重矩阵,运用探索性空间数据分析方法和ArcGIS技术研究省际碳强度的空间相关性及其统计特征。结果表明,各省份碳强度呈逐年下降态势,西部地区能源资源富集省份碳强度较高,而东部沿海省份和中部农业大省碳强度较低,省际碳强度存在空间正相关性和集聚特征,能源资源禀赋特征对各省份碳强度的高低和空间相关性特征产生重要影响。

关键词：碳强度空间相关性统计特征探索性空间数据分析

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低轨卫星通信系统的前导序列设计

北京邮电大学学报 2022年第6期45卷 75-81页

作者：朱剑锋孙耀华彭木根北京邮电大学信息与通信工程学院北京100876

由于低轨卫星波束小区最大前导到达时间差远大于第5代移动通信系统(5G)地面小区的最大前导到达时间差,在后5G低轨卫星通信系统中直接应用现有5G前导序列设计方案易导致定时提前估计失败。为此,通过分析两步定时提前估计流程和前导序列... 详细信息

由于低轨卫星波束小区最大前导到达时间差远大于第5代移动通信系统(5G)地面小区的最大前导到达时间差,在后5G低轨卫星通信系统中直接应用现有5G前导序列设计方案易导致定时提前估计失败。为此,通过分析两步定时提前估计流程和前导序列间干扰,提出一种增强前导序列设计方案,包括灵活级联前导子序列以及在子序列间进行差异化功率分配。仿真结果表明,当接入用户数为32且信噪比为-10 dB时,所提方案比现有方案能显著降低前导漏检率和用户随机接入失败的可能性。

关键词：低轨卫星随机接入前导序列设计定时提前估计