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A Bus Planning Algorithm for FPC Design in co.plex Scenarios

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Chinese Journal of Electronics 2024年第2期33卷 346-352页

作者： Haoying WU Sizhan ZOU Ning XU Shixu XIANG Mingyu LIU School of Information Engineering Wuhan University of Technology huawei Device co. Ltd.

Flexible printed circuit(FPC) design in co.plex scenarios has a list of pin co.centration areas, which lead to extremely co.gested intersection regions while co.necting the pins. Currently, it is challenging to explore the routability and to find topologically non-crossing and routable paths manually for the nets timely. The existing bus planning methods cannot offer optimal solutions co.cerning the special resource distribution of the FPC design. To investigate an effective way to shorten the routing time of FPC and achieve enhanced performance, a bus planning algorithm is proposed to tackle co.plex area co.nection problems. On the basis of the pin location information, the routing space is partitioned and generally represented as an undirected graph, and the topological non-crossing relationship between different regions is obtained using the dynamic pin sequence. co.sidering the routability and electrical co.straints, a heuristic algorithm is proposed to search the optimal location of the crossing point on the region boundary. Experimental results on industrial cases show that the proposed algorithm realize better performance in terms of co.nt and routability in co.parison with numerous selected state-of-the-art router and methods.

关键词： Flexible printed circuit Routability Non-crossing topology Heuristic algorithm

Scenarios analysis and performance assessment of blockchain integrated in 6G scenarios

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Science China(Information Sciences) 2024年第7期67卷 5-26页

作者： Bo LI Guanjie CHENG Honghao GAO Xueqiang YAN Shuiguang DENG co.lege of co.puter Science and Technology Zhejiang University co.lege of co.puter Science and Technology Shanghai University 2012 Lab Huawei Technologies Co. Ltd.

Emerging applications such as smart city infrastructures and virtual reality landscapes are setting rigorous benchmarks for 6G mobile networks, requiring elevated levels of co.fidentiality, integrity, nonrepudiation, authentication, and stringent access co.trols. Blockchain technology is heralded as a transformative enabler for meeting 6G standards, owing to its intrinsic attributes. However, a gap exists in the holistic investigation of blockchain's applicability in 6G realms, particularly addressing the “whether”, “when”, and“how” of its deployment. Present research trails in developing robust methodologies to gauge blockchain's efficacy within 6G use cases. Addressing this, our study introduces a novel co.fluence of blockchain with 6G networks, where data resides in distributed Hash tables(DHTs) while their hashes are secured in distributed ledger technology(DLT), harnessing blockchain's co.e strengths-immutability, traceability, and fortified security. We delineate seven specific 6G use cases poised for enhancement through blockchain integration,and scrutinize the rationale, nature, and timing of this co.vergence. Furthermore, we devise a co.prehensive methodology for assessing blockchain's performance metrics and scalability in 6G environments. Our extensive experimental analyses evaluate the synergistic performance of this integration, revealing that the Quorum blockchain satisfactorily supports 80% of 6G scenarios. The findings suggest that, with appropriate co.figurations, co.sortium blockchains are well-equipped to fulfill the demanding performance and scalability requisites of 6G networks.

关键词： blockchain distributed ledger technology (DLT) 6G performance assessment 6G scenarios analysis transaction arrival rate

co.tinuous-Time Channel Prediction Based on Tensor Neural Ordinary Differential Equation

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China co.munications 2024年第1期21卷 163-174页

作者： Mingyao Cui Hao Jiang Yuhao Chen Yang Du Linglong Dai The Department of Electronic Engineering Tsinghua UniversityBeijing 100084China huawei Technology co. Ltd.Chengdu Research InstituteChengdu 611730China

Channel prediction is critical to address the channel aging issue in mobile scenarios.Existing channel prediction techniques are mainly designed for discrete channel prediction,which can only predict the future channel in a fixed time slot per frame,while the other intra-frame channels are usually reco.ered by interpolation.However,these approaches suffer from a serious interpolation loss,especially for mobile millimeter-wave co.munications.To solve this challenging problem,we propose a tensor neural ordinary differential equation(TN-ODE)based co.tinuous-time channel prediction scheme to realize the direct prediction of intra-frame channels.Specifically,inspired by the recently developed co.tinuous mapping model named neural ODE in the field of machine learning,we first utilize the neural ODE model to predict future co.tinuous-time channels.To improve the channel prediction accuracy and reduce co.putational co.plexity,we then propose the TN-ODE scheme to learn the structural characteristics of the high-dimensional channel by low-dimensional learnable transform.Simulation results show that the proposed scheme is able to achieve higher intra-frame channel prediction accuracy than existing schemes.

关键词： channel prediction massive multipleinput-multiple-output millimeter-wave co.munications ordinary differential equation

A Generalized MSST Algorithm for co.nting Points of Elliptic Curves over■

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Journal of Systems Science & co.plexity 2024年第4期37卷 1738-1754页

作者： LI Xiao LV Chang PAN Zhizhong Key Laboratory of Cyberspace Security Defense Institute of Information Engineering Chinese Academy of Sciences School of Cyber Security University of Chinese Academy of Sciences huawei Technologies co. Ltd.

Elliptic curve cryptography is an important part of nowaday's public key cryptosystem.co.nting points of elliptic curves over finite fields is of great significance to the selection of safety curves.At present, there are many p-adic algorithms, such as SST algorithm, generalized AGM algorithm,Kedlaya algorithm, etc., which can deal with the situation of finite fields of small characteristics. In this paper, the authors generalize the MSST algorithm of characteristic 2 to general fields of odd characteristic, and propose the generalized MSST algorithm. The generalized MSST algorithm is achieved by co.bining the advantages of the SST algorithm and the generalized AGM algorithm. If the time co.plexity of the multiplication of two n-bit numbers is denoted as O（nμ）, then the time co.plexity of the generalized MSST algorithm is O■, which is the same as the improved SST algorithm. In practical experiments, the running time of the generalized MSST algorithm is less than that of the improved SST algorithm.

关键词： Elliptic curve generalized AGM algorithm generalized MSST algorithm SST algorithm

Semantic co.sistency and co.rectness Verification of Digital Traffic Rules

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Engineering 2024年第2期33卷 47-62页

作者： Lei Wan Changjun Wang Daxin Luo Hang Liu Sha Ma Weichao Hu Policy Standardand Patent DepartmentIntelligent Automotive Solution BUHuawei Technologies Co.Ltd.Beijing 100094China Research Institute for Road Safety of the Ministry of Public Security Beijing 100062China

The co.sensus of the automotive industry and traffic management authorities is that autonomous vehicles must follow the same traffic laws as human drivers.Using formal or digital methods,natural language traffic rules can be translated into machine language and used by autonomous vehicles.In this paper,a translation flow is designed.Beyond the translation,a deeper examination is required,because the semantics of natural languages are rich and co.plex,and frequently co.tain hidden assumptions.The issue of how to ensure that digital rules are accurate and co.sistent with the original intent of the traffic rules they represent is both significant and unresolved.In response,we propose a method of formal verification that co.bines equivalence verification with model checking.Reasonable and reassuring digital traffic rules can be obtained by utilizing the proposed traffic rule digitization flow and verification method.In addition,we offer a number of simulation applications that employ digital traffic rules to assess vehicle violations.The experimental findings indicate that our digital rules utilizing metric temporal logic(MTL)can be easily inco.porated into simulation platforms and autonomous driving systems(ADS).

关键词： Autonomous driving Traffic rules Digitization Formalization Verification

A novel dual-co.e fiber-optic gyrosco.e with independent rotation rate measurements in different co.es of a dual-co.e optical fiber

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Optoelectronics Letters 2024年

作者： EMIL A.MILIKOV VIACHESLAV V.ZEMLYAKOV PAVEL S.ANISIMOV GAO Jiexing 2012 Labs Central Research Institute huawei Technologies co. Ltd.

We introduce an all-fiber stationary phase shifter for a fiber-optic gyrosco.e which simultaneously provides phase shifts of opposite signs in different co.es of the dual-co.e optical fiber. We propose a new dual-co.e fiber-optic gyrosco.e in which different co.es of the dual-co.e optical fiber provide independent rotation rate measurements. The device enables implementation of a differential scheme， which ensures the stability of the measured phase shift. As a co.puter simulations result， the accuracy of the rotation rate sensing increased by up to 10 times at typical noise levels.

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The First Verification Test of Space-Ground co.laborative Intelligence via Cloud-Native Satellites

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China co.munications 2024年第4期21卷 208-217页

作者： Wang Shangguang Zhang Qiyang Xing Ruolin Qi Fei Xu Mengwei State Key Laboratory of Networking and Switching Beijing University of Posts and TelecommunicationsBeijing 100876China Star Network and Intelligent co.puting Laboratory Beiyou Shenzhen InstituteShenzhen 518000China huawei Technologies co. LtdShenzhen 518129China

Recent advancements in satellite technologies and the declining co.t of access to space have led to the emergence of large satellite co.stellations in Low Earth Orbit(LEO).However,these co.stellations often rely on bent-pipe architecture,resulting in high co.munication co.ts.Existing onboard inference architectures suffer from limitations in terms of low accuracy and inflexibility in the deployment and management of in-orbit applications.To address these challenges,we propose a cloud-native-based satellite design specifically tailored for Earth Observation tasks,enabling diverse co.puting paradigms.In this work,we present a case study of a satellite-ground co.laborative inference system deployed in the Tiansuan co.stellation,demonstrating a remarkable 50%accuracy improvement and a substantial 90%data reduction.Our work sheds light on in-orbit energy,where in-orbit co.puting acco.nts for 17%of the total onboard energy co.sumption.Our approach represents a significant advancement of cloud-native satellite,aiming to enhance the accuracy of in-orbit co.puting while simultaneously reducing co.munication co.t.

关键词： cloud-native satellite orbital edge co.puting satellite inference verification test

Can the improvement of co.petitive adequacy and fairness reduce discriminatory M&A behavior?Evidence from the market access negative list pilot in China

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China Journal of Acco.nting Research 2024年第1期17卷 96-131页

作者： Xiongyuan Wang Jing Xu Shuai Wang School of Acco.nting Zhongnan University of Economics and LawWuhanChina Institute of Eco.ogical Civilization School of EconomicsZhongnan University of Economics and LawWuhanChina huawei Technology co.Ltd ShenzhenChina

co.porate mergers and acquisitions(M&As)are subject to skewed logic due to excessive government regulation.China is progressively adopting the Market Access Negative List(MANL)pilot to transfer the power of resource allocation from the government to the market.Using the DID method,we examine the impact of relaxing market access regulation on firms’M&A behavior against China’s institutional background and the M&A events of listed co.panies from 2012 to 2019.The MANL significantly increases firms’M&A tendency and amount and strengthens the co.petitive adequacy and fairness of market-oriented M&A decisions.Post-M&A financial performance does not increase,but human capital productivity,innovation effectiveness and total factor productivity do,demonstrating the dynamic balance of profit and efficiency in M&As.

关键词： Transition eco.omies Market access deregulation Market access negative list Mergers and acquisitions

多尺度有序结构碲化铋在微型热电器件中的应用

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Science Bulletin 2024年第3期69卷 295-298页

作者：刘求林卢艳东朱航天钱鑫杨荣贵赵怀周 Beijing National Laboratory for co.densed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Optical Access Network Hardware Development Department Huawei Technologies Co.Ltd.Shenzhen 226236China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China

Thermoelectric devices allow direct co.version between electricity and heat,which include thermoelectric generators(TEGs)and thermoelectric co.lers(TECs)based on the Seebeck and Peltier effects,respectively[1].Despite suffering from low energy co.version efficiency,thermoelectric devices have played an irreplaceable role in space exploration and solid-state co.ling due to their advantages of co.pactness,fast response,and absence of moving parts and refrigerant.In particular,near-room temperature(250–400 K)TECs play a key role in the precise temperature co.trol of lidar.

关键词： replace precise absence