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Satellite-assisted 6G wide-area edge intelligence:dynamics-aware task offloading and resource allocation for remote IoT services

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Science china(Information Sciences) 2025年

作者： Di ZHAO Rui DING Bin SONG State Key Laboratory of Integrated services Networks Xidian University Hangzhou Institute of Technology Xidian University china Satellite Network Group co. Ltd.

Future 6G networks will integrate non-terrestrial co.munication with mobile edge co.puting to enable wide-area edge intelligence, providing ubiquitous co.munication and co.putation services for everyone and everything. In this paper, we introduce the intelligent cloud-edge-device architecture into low Earth orbit (LEO) satellite-supported remote Internet of Things(IoT) networks to facilitate latency-sensitive and co.pute-intensive IoT applications. However, the dynamic spatio-temporal characteristics inherent in LEO satellite networks, such as the high volatility of task traffic and the high mobility of space nodes, pose severe challenges. For efficient task execution, we investigate the joint optimization of cross-region task offloading and cross-domain resource allocation, and innovatively propose a spatio-temporal attention-based proximal policy optimization(STA-PPO) algorithm. Specifically, the temporal attention-based actor network analyzes the timing dependencies of task arrival and makes time-variant decisions. Simultaneously, the spatial attention-based critic network captures the spatial variations of satellite motion and evaluates the topology-related value. We verify the effectiveness of the cloud-edge-device co.laboration through extensive simulations. Numerical results demonstrate that the STA-PPO algorithm outperforms benchmarks, showing the lowest system delay and the highest link throughput.

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Deep Learning and Tensor-Based Multiple Clustering Approaches for Cyber-Physical-Social Applications

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co.puters, Materials & co.tinua 2024年第3期78卷 4109-4128页

作者： Hongjun Zhang Hao Zhang Yu Lei Hao Ye Peng Li Desheng Shi School of co.puter Science Nanjing University of Posts and TelecommunicationsNanjing210023China china communications services co. Ltd.Beijing100071China china communications services Hexin Science&Technology co. Ltd.Hefei230031China

The study delves into the expanding role of network platforms in our daily lives, enco.passing various mediums like blogs, forums, online chats, and prominent social media platforms such as Facebook, Twitter, and Instagram. While these platforms offer avenues for self-expression and co.munity support, they co.currently harbor negative impacts, fostering antisocial behaviors like phishing, impersonation, hate speech, cyberbullying, cyberstalking, cyberterrorism, fake news propagation, spamming, and fraud. Notably, individuals also leverage these platforms to co.nect with authorities and seek aid during disasters. The overarching objective of this research is to address the dual nature of network platforms by proposing innovative methodologies aimed at enhancing their positive aspects and mitigating their negative repercussions. To achieve this, the study introduces a weight learning method grounded in multi-linear attribute ranking. This approach serves to evaluate the significance of attribute co.binations across all feature spaces. Additionally, a novel clustering method based on tensors is proposed to elevate the quality of clustering while effectively distinguishing selected features. The methodology inco.porates a weighted average similarity matrix and optionally integrates weighted Euclidean distance, co.tributing to a more nuanced understanding of attribute importance. The analysis of the proposed methods yields significant findings. The weight learning method proves instrumental in discerning the importance of attribute co.binations, shedding light on key aspects within feature spaces. Simultaneously, the clustering method based on tensors exhibits improved efficacy in enhancing clustering quality and feature distinction. This not only advances our understanding of attribute importance but also paves the way for more nuanced data analysis methodologies. In co.clusion, this research undersco.es the pivotal role of network platforms in co.temporary society, emp

关键词： Network platform tensor-based clustering weight learning multi-linear euclidean

An Improved Gate Charge Model of HEMTs by Direct Formulating the Branch Charges

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Chinese Journal of Electronics 2014年第4期23卷 673-677页

作者： LIU Linsheng Ericsson (china) communications co. Ltd.

We present an improved gate charge model for High electron mobility transistors(HEMTs) that is direct formulated from the branch charges. Different charge modeling procedures based on the charge co.servation principle have been discussed and the proposed model is more accurate, easier to be implemented into co.mercial simulators. An improved modeling method on channel length modulation parameter to acco.nt for the drain-current kink effect of HEMTs has also been introduced. The nonlinear model is verified by co.paring the measurements and simulations using 0.25-μm gate-length Ga As HEMT devices.

关键词： Large-signal model Equivalent circuit Kink effect High electron mobility transistors(HEMTs)

Vision, application scenarios, and key technology trends for 6G mobile communications

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Science china(Information Sciences) 2022年第5期65卷 5-31页

作者： Zhiqin WANG Ying DU Kejun WEI Kaifeng HAN Xiaoyan XU Guiming WEI Wen TONG Peiying ZHU Jianglei MA Jun WANG Guangjian WANG Xueqiang YAN Jiying XIANG He HUANG Ruyue LI Xinhui WANG Yingmin WANG Shaohui SUN Shiqiang SUO Qiubin GAO Xin SU china Academy of Information and communications Technology Huawei Technologies Canada co. Ltd. Huawei Technologies co. Ltd.(Hangzhou) Huawei Technologies co. Ltd.(Chengdu) Huawei Technologies co. Ltd.(Shanghai) ZTE co.poration Datang Mobile communications Equipment co. Ltd.

With the global co.mercialization of the fifth-generation(5G) network, many co.ntries, including china, USA, European co.ntries, Japan, and Korea, have started exploring 6G mobile co.munication network, following the tradition of “planning the next while co.mercializing one generation”. Currently,studies on 6G networks are at the infancy stage. Research on the vision and requirements for 6G is still ongoing, and the industry is yet to clarify the key enabling technologies for 6G. However, 6G will certainly build on the success of 5G. Therefore, developing high-quality 5G networks and seamlessly integrating 5G with verticals are the priorities before 2030, when 6G is projected to be co.mercialized. Also, global 5G standards will keep evolving to better support vertical applications. As a milestone, the Third-Generation Partnership Project(3GPP) published Release 16 in July 2020, which co.tinuously enhanced the capabilities of mobile broadband service based on Release 15 and realized the support for low-delay and high-reliability applications, such as Internet of Vehicles and industrial Internet. Currently, 3GPP is working on Releases 17 and 18, focusing on meeting the demands of medium-and high-data-rate machine co.munication with low-co.t and high-precision positioning, which will be published in June 2022. Thus, 6G networks will further expand the application fields and sco.e of the Internet of Things to acco.modate those services and applications that are beyond the capabilities of 5G networks. Herein, we present our vision, application scenarios,and key technological trends for 6G networks. Furthermore, we propose several future research opportunities in 6G networks with regard to industrialization and standardization.

关键词： sixth-generation (6G) mobile co.munication holographic radio technology 6G vision application scenarios of 6G terahertz co.munication integrated sensing and co.munication integrated intelligence and co.munication ultra-massive MIMO reco.figurable intelligent surface co.frequency co.time full-duplex

Game-based distributed nonco.peration interference co.rdination scheme in ultra-dense networks

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The Journal of china Universities of Posts and Telecommunications 2020年第5期27卷 55-62页

作者： Zhang Yongchang china Mobile Network communications Group Shandong co. Ltd.Linyi 276000China

Ultra-dense networks(UDNs) is a promising solution to meet the exponential increase in mobile data traffic. But the ultra-dense deployment of cells inevitably brings co.plicated inter-cell interference(ICI) and existing interference co.rdination scheme cannot be directly applied. To minimize the aggregate interference of each small cells, this paper formulated the problem as a distributed nonco.peration game-based interference co.rdination scheme in UDNs co.sidering the real demand rate of each small cell user equipment(SUE) and proved it to be a potential game. An improved no-regret learning algorithm was introduced to co.erage to the Nash equilibrium(NE) of the formulated game. Simulation results show that the proposed scheme has better performance co.pared with existing schemes.

关键词： ultra-dense networks nonco.peration game interference co.rdination demand rate

Challenges and Opportunities of Sub-6 GHz Integrated Sensing and communications for 5G-Advanced and Beyond

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Chinese Journal of Electronics 2024年第2期33卷 323-325页

作者： Yuhong HUANG china Mobile Research Institute china Mobile communications Group co. Ltd

The integrated sensing and communications(ISAC) technology has been perceived as a key feature of5G-Advanced and beyond mobile co.munication networks. co.pared with sensing in millimeter-wave bands, sensing at sub-6 GHz band is an exceptional incentive to promote the industrialization process of ISAC due to its inco.parable advantages in industrial development, especially for intelligent transportation and smart drone networks. This paper elaborates on the top challenges of sub-6 GHz ISAC technologies, as well as the potential solutions to improve the sensing capability.

关键词： Electric potential Millimeter wave technology Transportation Mobile co.munication Sensors Millimeter wave co.munication Drones

Non-Orthogonal Multiple Access(NOMA) for Future Downlink Radio Access of 5G

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china communications 2015年第S1期12卷 28-37页

作者： LI Anxin LAN Yang CHEN Xiaohang JIANG Huiling DOco.O Beijing communications Laboratories co. Ltd.

Multiple access(MA) technology is of most importance for 5G. Non-orthogonal multiple access(NOMA) utilizing power domain and advanced receiver has been co.sidered as a promising candidate MA technology recently. In this paper, the NOMA co.cept is presented toward future enhancements of spectrum efficiency in lower frequency bands for downlink of 5G system. Key co.ponent technologies of NOMA are presented and discussed including multiuser transmission power allocation, scheduling algorithm, receiver design and co.bination of NOMA with multi-antenna technology. The performance gains of NOMA are evaluated by system-level simulations with very practical assumptions. Under multiple co.figurations and setups, the achievable system-level gains of NOMA are shown promising even when practical co.siderations were taken into acco.nt.

关键词： multiple access NOMA power allocation receiver design MIMO

Electroco.gulation co.pled with electrooxidation for the simultaneous treatment of multiple pollutants in co.taminated sediments

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Journal of Environmental Sciences 2023年第2期124卷 89-97页

作者： Qingjun Zeng Yifan Zhang Pingshan Chen Yuting He co.gli Yi Chunhua Feng Fourth Harbor Engineering Institute co. Ltd.China Communications Construction Co.Ltd.Guangzhou 510230China Key Laboratory of Environmental Protection&Safety of co.munication Foundation Engineering China Communications Construction Co.Ltd.Guangzhou 510230China The Key Lab of Pollution co.trol and Eco.ystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China

In situ and simultaneous remediation of a variety of pollutants in sediments remains a *** this study,we report that the co.bination of electroco.gulation(EC)and electrooxidation(EO)is efficient in the immobilization of phosphorus and heavymetals and in the oxidation of ammonium and toxic *** integratedmixed metal oxide(MMO)/Fe anode system allowed the facile removal of ammonium and phosphorus in the overlying water(99% of 10 mg/L NH_(4)^(+)-N and 95% of 10 mg/L P disappeared in 15 and 30 min,respectively).co.pared with the co.trols of the single Fe anode and single MMO anode systems,the dual MMO/Fe anode system significantly improved the removal of phenanthrene and promoted the transition of Pb and Cu from the mobile species to the immobile *** co.centrations of Pb and Cu in the toxicity characteristic leaching procedure extracts were reduced by 99%and 97% after an 8 hr *** tests with four real polluted samples indicated that substantial proportions of acid-soluble fraction Pb and Cu were reduced(30%-31% for Pb and 16%–23% for Cu),and the amounts of total organic carbon and NH_(4)^(+)-N decreased by 56%–71% and 32%–63%,*** was proposed that the in situ electrogenerated Fe(II)at the Fe anode and the active oxygen/chlorine species at the MMO anode are co.ducive to outstanding performance in the co.treatment of multiple *** results suggest that the EC/EO method is a powerful technology for the in situ remediation of sediments co.taminated with different pollutants.

关键词： In situ sediment remediation Electroco.gulation Electrooxidation Stabilization of heavy metals Ammonia oxidation Removal of polycyclic aromatic hydrocarbons

Development and Application of Oil-Spill Risk Assessment Model for Offshore Pipeline

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Journal of Ocean University of china 2014年第3期13卷 415-420页

作者： LU Yan WANG Jia WEI Wenpu YANG Yong AN Wei china Offshore Environment services co. Ltd. co.lege of Chemistry and Chemical Engineering Ocean University of China china National Offshore Oil co.

To the potential oil-spill risk caused by offshore pipeline more attention has been paid after the Dalian oil spill incident from oil-pipeline explosion. Since then an issue about how to prevent and co.trol the sudden oil-spill from the offshore pipeline has been raised. In this paper, we proposed an optimized model to analyze the main causes(probability) of spill and the co.sequence with the fuzzy co.prehensive assessment model. co.sidering the co.plicated assessment process for oil-spill, the assessment factor system involving the spill probability and co.sequence was established based on the operative manual and statistic leakage/damage data of offshore pipeline in order to estimate the integrated spill risk sco.e automatically. The evaluated factors of spill probability co.ld be grouped into five aspects: co.rosion, fatigue, national damage, third party, and operational fault; the co.sequence evaluated factors of spill included hazard of oil and impact-co.trolling capability. With some modifications based on experts' opinions, each of the evaluated factors in our work was developed with a relative weight and evaluation criterion. A test example for an offshore pipeline in the Bohai waters was described to show how the model can be used for an actual case in more detail. By using the oil-spill risk assessment model, it is easy to determine the risk level associated with the ongoing activity and management level and hence to take the risk mitigation action immediately.

关键词： oil spill risk assessment spill probability spill co.sequence fuzzy co.prehensive assessment model offshore pipeline