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移动通信使能其他行业碳减排的定量评估:指标、方法和案例

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中国科学：信息科学 2024年第4期54卷 777-787页

作者：张四海崔婵孙宏宇曾勇梅朱江朱近康中国科学技术大学中国科学院无线光电通信重点实验室合肥230026 中国科学技术大学微电子学院合肥230026 华为技术有限公司上海201206

随着新一代信息通信技术(information and communication technologies,ICT)的高速发展以及新基建的部署,移动通信系统的能耗和碳排放出现较快增长的趋势.ICT行业在自身节能减排之外,使能其他行业节能减排,可有效降低其他行业的碳排放,... 详细信息

随着新一代信息通信技术(information and communication technologies,ICT)的高速发展以及新基建的部署,移动通信系统的能耗和碳排放出现较快增长的趋势.ICT行业在自身节能减排之外,使能其他行业节能减排,可有效降低其他行业的碳排放,是未来理论研究行业应用的重要领域.本文基于ICT使能碳减排评估框架,提出两个定量衡量使能效果的指标,使能减碳比(enable carbon reduction ratio,ECRR)和使能低碳系数(enable carbon reduction coefficient,ECRC)以及相应的定量分析方法,用于评估被使能企业的实际碳减排效果.本文研究可保护数据隐私的多方数据共享,基于安全多方计算(secure multi-party computation,SMPC)框架,提出保护各方数据隐私的使能碳减排评估方法.本文通过实际案例,完成数据采集、分析验证,对所提指标和方法论证其有效性和实用性.

关键词： ICT使能碳减排量化评估隐私保护全生命周期碳足迹使能低碳系数

Low complexity power control approach based on MMSE detection for V-BLAST

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Journal of Systems Engineering and Electronics 2006年第4期17卷 743-749页

作者： Zhao Kun Qiu Ling zhu jinkang PCN & SS Lab Univ. of Science and Technology of China Hefei 230027 P. R. China

A low complexity Per-Antenna Power Control （PAPC） approach based on Minimum Mean Squared Error （MMSE） detection for V-BLAST is proposed in this paper. The PAPC approach is developed for minimizing the Bit Error Rate （BER） averaged over all substreams when the data throughput and the total transmit power keep constant over time. Simulation results show that the Power-controlled V-BLAST （P-BLAST） outperforms the conventional V-BLAST in terms of BER performance with MMSE detector, especially in presence of high spatial correlation between antennas. However, the additional complexity for P-BLAST is not high. When MMSE detector is adopted, the P-BLAST can achieve a comparable BER performance to that of conventional V-BLAST with Maximum Likelihood （ML） detector but with low complexity.

关键词： Vertical Bell Lab Layered Space-Time power control MINMAX minimum mean squared error aximum likelihood.

Design and Optimization of Communication System Based on Superconducting Three-Energy-Level System

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Journal of Communications and Information Networks 2023年第1期8卷 57-70页

作者： Zhang Junyu Gong Chen Li Shangbin zhu jinkang Key Laboratory of WirelessOptical Communications Chinese Academy of Sciencesthe School of Information Science and TechnologyUniversity of Science and Technology of ChinaHefei 230000China.

We propose aΛ-type superconducting three-energy-level device-based communication system for extremely weak microwave communication scenarios,for example,long-distance deep-space *** provide a system diagram and propose the frame synchronization and power estimation approaches based on pre-defined synchronization *** on the microwave response characteristics of the superconducting three-energy-level system,we further investigate the optimization of synchronization sequence and information symbol *** show that three-energy-level systems with weak Markovianity can be approximated using independent identical distribution methods to obtain optimal synchronization sequences,and the optimal modulation is *** proposed system design and optimization approaches are evaluated by numerical ***,we investigate the performance of the three-energy-level communication system in the presence of *** results show that the three-energy-level communication system can tolerate more than 10 dB interference compared to long term evolution(LTE)systems and achieve the same communication rate for the same bandwidth and temperature.

关键词： microwave photon detection Λ-type threeenergy-level system superconducting devices energy-level transition

Benefits Analysis of Beam Hopping in Satellite Mobile System with Unevenly Distributed Traffic

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China Communications 2021年第9期18卷 11-23页

作者： Yitao Li Zhongqiang Luo Wuyang Zhou jinkang zhu School of Automation and Information Engineering Sichuan University of Science and EngineeringArtificial Intelligence Key Laboratory of Sichuan ProvinceYibin 644000China CAS Key Laboratory of Wireless-Optical Communications Chinese Academy of SciencesSchool of Information Science and TechnologyUniversity of Science and Technology of China(USTC)Hefei 230026China

Satellite mobile system and space-airground integrated network have a prominent superiority in global coverage which plays a critical role in remote and non-land regions, as well as emergency communications. However, due to the gradual angle attenuations of the satellite antennas, it is difficult to achieve full frequency multiplex among different beams as terrestrial 5G network. Multi-color frequency reuse is widely adopted in both academic and industry. Beam hopping scheme has attracted the attention of researchers recently due to the allocation flexibility. In this paper, we focus on analyzing the performance benefits of beam hopping compared with multi-color frequency reuse scheme in non-uniform user and traffic distributions in satellite system. Aerial networks are also introduced to form a space-airground integrated network for coverage enhancement,and the capacity improvement is analyzed. Besides,additional improved techniques are provided to make comprehensive analysis and comparisons. Theoretical analysis and simulation results indicate that the beam hopping scheme has a prominent superiority in the system capacity compared with the traditional multicolor frequency reuse scheme in both satellite mobile system and future space-air-ground integrated network.

关键词： satellite communication space-air-ground integrated network beam hopping unevenly distributed traffic performance analysis

Aggregation transmission scheme for machine type communications

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Science China(Information Sciences) 2017年第10期60卷 68-77页

作者： Yanhuan SUN Ming ZHAO Sihai ZHANG jinkang zhu Wuyang ZHOU Shengli ZHOU Key Laboratory of Wireless-Optical Communications Chinese Academy of SciencesUniversity of Science and Technology of China Laboratory of Personal Communication Network and Spread Spectrum University of Science and Technology of China Department of Electrical and Computer Engineering University of Connecticut

Massive amount of small data generated by machine type communications(MTC) will pose a challenge to the future fifth generation(5G) wireless network. Since the information from or to the machine type users aggregating closely are highly correlated, the relevance of data can be excavated by big data analysis to help improve the spectral efficiency. In this paper we proposed an aggregation transmission scheme(ATS) for MTC downlink transmissions in which the transmission order of users’ data packets can be adjusted according to their relevance under the delay constraints. The users having relevance will temporally share the time slots and their data are transmitted in a multicast way so that much less timeslots are needed. We propose three different algorithms, conditional random search(CRS), standard-row algorithm(SRA), and genetic algorithm(GA) to tackle the problem of transmission order adjustment. Simulation results validate the good performance of ATS and demonstrate that SRA has the lowest complexity while GA may achieve a better performance. We also analyze the impact of different delay requirements. Our work sheds light on dealing with massive MTC data traffic for future wireless communications.

关键词： machine type communications aggregation transmission scheme delay tolerance genetic algorithm big data

Exploring the Road to 6G: ABC-Foundation for Intelligent Mobile Networks

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China Communications 2020年第6期17卷 51-67页

作者： jinkang zhu Ming Zhao Sihai Zhang Wuyang Zhou CAS Key Laboratory of Wireless-Optical Communications University of Science and Technology of ChinaHefei 230022China

The 5 th generation(5 G)mobile networks has been put into services across a number of markets,which aims at providing subscribers with high bit rates,low latency,high capacity,many new services and vertical *** the research and development on 6 G have been put on the *** demands and characteristics of future 6 G,artificial intelligence(A),big data(B)and cloud computing(C)will play indispensable roles in achieving the highest efficiency and the largest ***,the initials of these three aspects remind us the significance of vitamin ABC to human *** this article we specifically expound on the three elements of ABC and relationships in *** analyze the basic characteristics of wireless big data(WBD)and the corresponding technical action in A and C,which are the high dimensional feature and spatial separation,the predictive ability,and the characteristics of *** on the abilities of WBD,a new learning approach for wireless AI called knowledge+data-driven deep learning(KD-DL)method,and a layered computing architecture of mobile network integrating cloud/edge/terminal computing,is proposed,and their achievable efficiency is *** progress will be conducive to the development of future 6 G.

关键词： 6G Artificial intelligence Wireless big data Cloud computing Knowledge+data driven deep learning layered computing layered network

Light-driven interconversion of Pd_(2)L_(4)cage and mononuclear PdL_(2)mediated by the isomerization of azobenzene ligand

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Chinese Chemical Letters 2023年第6期34卷 358-361页

作者： jinkang zhu Xujin Chen Xin Jin Qiaochun Wang Key Laboratory for Advanced Materials Joint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

The lantern-shaped cage Pd_(2)L_(4)and tweezer-like PdL_(2)can be synthesized from the trans-and cis-isomer of an azobenzene-containing ligand,respectively,which were characterized by^(1)H,^(13)C,^(1)H-^(1)H COSY,DOSY NMR spectroscopies,high-resolution ESI-MS and density function theory(DFT)*** interconversion of Pd_(2)L_(4)and PdL_(2)can be achieved via the cis-trans isomerization of the azobenzene unit on the ligand upon alternative irradiation of light 365 nm or 420 nm.

关键词： Molecular cage Azobenzene Isomerization Pd_(2)L_(4) PdL_(2)

Foundation Study on Wireless Big Data: Concept, Mining, Learning and Practices

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China Communications 2018年第12期15卷 1-15页

作者： jinkang zhu Chen Gong Sihai Zhang Ming Zhao Wuyang Zhou Key Laboratory of Wireless-Optical Communications Chinese Academy of Sciences School of Information Science and Technology University of Science and Technology of China

Facing the development of future 5 G, the emerging technologies such as Internet of things, big data, cloud computing, and artificial intelligence is enhancing an explosive growth in data traffic. Radical changes in communication theory and implement technologies, the wireless communications and wireless networks have entered a new era. Among them, wireless big data(WBD) has tremendous value, and artificial intelligence(AI) gives unthinkable possibilities. However, in the big data development and artificial intelligence application groups, the lack of a sound theoretical foundation and mathematical methods is regarded as a real challenge that needs to be solved. From the basic problem of wireless communication, the interrelationship of demand, environment and ability, this paper intends to investigate the concept and data model of WBD, the wireless data mining, the wireless knowledge and wireless knowledge learning(WKL), and typical practices examples, to facilitate and open up more opportunities of WBD research and developments. Such research is beneficial for creating new theoretical foundation and emerging technologies of future wireless communications.

关键词： wireless big data data model data mining wireless knowledge knowledge learning future wireless communications

Energy Efficiency Optimization in Relay-Assisted Networks with Energy Harvesting Relay Constraints

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China Communications 2015年第2期12卷 84-94页

作者： ZHAO Ming ZHAO Jing ZHOU Wuyang zhu jinkang ZHANG Sihai Key Laboratory of Wireless-Optical Communications Chinese Academy of SciencesUniversity of Science and Technology of China

In this paper we consider data transmission in a decode-and-forward(DF)relay-assisted network in which the relay is energy harvesting(EH) powered while the base station(BS) is power-grid *** purpose is to maximize the BS's energy efficiency(EE) while making full use of the relay's renewable energy and satisfying the specific average throughput *** contrast to existing literature on energy harvesting system which only considers the radio transmission power,we take the static circuit power into account as *** formulate the EE optimization problem and prove that the EE of the BS and relay are both quasiconvex in the instantaneous transmission *** we divide the complex optimization problem into two point-to-point link level optimization parts and propose an energyefficient resource allocation(EERA) scheme in which power control and sleep mode management are jointly *** simulation results demonstrate that EERA may achieve good energy saving *** also compare the EE of an energy harvesting relay system with a power-grid powered one and provide more insight into the EE problem of energy harvesting relay system.

关键词： energy efficiency energy harvesting relay sleep mode