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A Dual-Cluster-Head Based Medium Access Control for Large-Scale UAV Ad-Hoc Networks

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China Communications 2024年第5期21卷 123-136页

作者： Zhao Xinru wei zhiqing Zou Yingying Ma Hao Cui Yanpeng Feng Zhiyong Key Laboratory of Universal Wireless Communications Ministry of EducationSchool of Information and Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing100876China

Unmanned Aerial Vehicle(UAV)ad hoc network has achieved significant growth for its flexibility,extensibility,and high deployability in recent *** application of clustering scheme for UAV ad hoc network is imperative to enhance the performance of throughput and energy *** conventional clustering scheme,a single cluster head(CH)is always assigned in each ***,this method has some weaknesses such as overload and premature death of CH when the number of UAVs *** order to solve this problem,we propose a dual-cluster-head based medium access control(DCHMAC)scheme for large-scale UAV *** DCHMAC,two CHs are elected to manage resource allocation and data forwarding ***,two CHs work on different *** of CH is used for intra-cluster communication and the other one is for inter-cluster communication.A Markov chain model is developed to analyse the throughput of the *** result shows that compared with FM-MAC(flying ad hoc networks multi-channel MAC,FM-MAC),DCHMAC improves the throughput by approximately 20%~50%and prolongs the network lifetime by approximately 40%.

关键词： dual cluster head medium access control UAV swarm

Sensing-Assisted Accurate and Fast Beam Management for Cellular-Connected mmWave UAV Network

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China Communications 2024年第6期21卷 271-289页

作者： Cui Yanpeng Zhang Qixun Feng Zhiyong Qin Wen Zhou Ying wei zhiqing Zhang Ping School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China School of Computer Science Northwestern Polytechnical UniversityXi’an 710072China

Beam management,including initial access(IA)and beam tracking,is essential to the millimeter-wave Unmanned Aerial Vehicle(UAV)***,the conventional communicationonly and feedback-based schemes suffer a high delay and low accuracy of beam alignment,since they only enable the receiver to passively“hear”the information of the transmitter from the radio *** paper presents a novel sensing-assisted beam management approach,the first solution that fully utilizes the information from the visual domain to improve communication *** employ both integrated sensing and communication and computer vision techniques and design an extended Kalman filtering method for beam tracking and ***,we also propose a novel dual identity association solution to distinguish multiple UAVs in dynamic ***-world experiments and numerical results show that the proposed solution outperforms the conventional methods in IA delay,association accuracy,tracking error,and communication performance.

关键词： beam management integrated sensing and communication UAV communication

Molecular Cloning and Bioinformatics Analysis of sucC Gene of Vibrio alginolyticus Strain HY9901

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Asian Agricultural Research 2024年第8期16卷 32-37页

作者： Yingzhu wei zhiqing wei Xuelian LIN Huanying PANG Na WANG Fisheries College Guangdong Ocean UniversityZhanjiang 524025China Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture&Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes Zhanjiang 524025China Chinese Academy of Inspection and Quarantine Beijing 100176China

[Objectives]To clone the sucC gene of Vibrio alginolyticus strain HY9901 and conduct the bioinformatics analysis.[Methods]Based on the sucC gene of *** strain HY9901,specific primers were designed to amplify the full length sequence by PCR and make further analysis.[Results]The theoretical molecular weight of SucC protein was about 41528.45 Da,and the full length was 1167 bp,encoding 388 amino *** has no signal peptide and transmembrane region,and has a variety of functional *** is predicted that it is mainly located in the cytoplasm,and the ubiquitin and lactate modification sites overlap,and it has high gene homology with Vibrio ***α-helix,random coil and extended strand are the main secondary *** similarity between the constructed three-level structure model and the template is high.[Conclusions]This study reveals the structural characteristics and functional potential of SucC protein,and provides a theoretical basis for the study of drug resistance mechanism and prevention strategies.

关键词： Vibrio alginolyticus Gene amplification sucC gene Succinyl-Coa synthetase Protein post-translational modification Bioinformatics analysis

Molecular Cloning and Bioinformatics Analysis of msrA Gene from Vibrio alginolyticus Strain HY9901

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Agricultural Biotechnology 2024年第4期13卷 1-5,10页

作者： zhiqing wei Zhihang CHEN Yingzhu wei Na WANG Huanying PANG Fisheries College Guangdong Ocean UniversityZhanjiang 524025China Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture&Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes Zhanjiang 524025China Chinese Academy of Inspection and Quarantine Beijing 100176China

[Objectives]This study was conducted to understand the structure and function of MsrA protein.[Methods]With Vibrio alginolyticus HY9901 as the object of study,primers were designed to amplify the full-length gene of msrA,and its bioinformatics analysis was carried out.[Results]The full length of msrA gene was 639 bp,encoding 212 amino acids,and its theoretical molecular weight was about 23729.60 *** protein had a stable structure,and it was hydrophobic *** structure of signal peptides at the N terminal of the amino acid sequence was predicted,and it was found that there was no signal peptide cleavage site and no transmembrane *** amino acid sequence of MsrA contained multiple signal binding *** subcellular localization showed that MsrA protein was most likely located in the *** analysis showed that MsrA of *** had high homology with other Vibrio species,and the highest homology with *** the prediction of functional domains,MsrA had the function of methionine sulfoxide *** secondary structure prediction,MsrA contained random coils at a proportion of 46.70%,which was the *** similarity between the tertiary structure model of MsrA and template Q87SW6.1.A was 89.15%.PTM analysis showed that MsrA protein had many PTM modification sites such as phosphorylation and glycosylation sites.[Conclusions]This study provides some reference value for further study on the role of MsrA in bacterial antioxidant stress.

关键词： Vibrio alginolyticus Gene cloning MsrA Bioinformatics analysis

Cluster-based RSU deployment strategy for vehicular ad hoc networks with integration of communication,sensing and computing

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Journal of Information and Intelligence 2024年第4期2卷 325-338页

作者： Xinrui Gu Shengfeng Wang zhiqing wei Zhiyong Feng Key Laboratory of Universal Wireless Communications Ministry of EducationSchool of Information and Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China

The integration of communications,sensing and computing(I-CSC)has significant applications in vehicular ad hoc networks(VANETs).A roadside unit(RSU)plays an important role in I-CSC by performing functions such as information transmission and edge computing in vehicular *** to the constraints of limited resources,RSU cannot achieve full coverage and deploying RSUs at key cluster heads of hierarchical structures of road networks is an effective management ***,direct extracting the hierarchical structures for the resource allocation in VANETs is an open *** this paper,we proposed a network-based renormalization method based on information flow and geographical location to hierarchically deploy the RSU on the road *** renormalization method is compared with two deployment schemes:genetic algorithm(GA)and memetic framework-based optimal RSU deployment(MFRD),to verify the improvement of communication *** results show that the renormalization method is superior to other schemes in terms of RSU coverage and information reception rate.

关键词： Roadside unit(RSU)deployment strategy Vehicular ad hoc networks(VANETs) Hierarchical structures Renormalization group Complex network

Sensing and Communication Integrated Fast Neighbor Discovery for UAV Networks

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ZTE Communications 2024年

作者： wei zhiqing ZHANG Yongji JI Danna LI Chenfei Beijing University of Posts & Telecommunications

In unmanned aerial vehicle (UAV) networks， the high mobility of nodes leads to frequent changes in network topology， which brings challenges for the neighbor discovery (ND) of UAV networks. Integrated sensing and communication (ISAC)， as an emerging technology in 6G mobile networks， has shown great potential in improving communication performance with the assistance of sensing information. ISAC obtains the prior information about node distribution， reducing the ND time. However， the prior information obtained through ISAC may be imperfect. Hence， an ND algorithm based on reinforcement learning is proposed. The learning automaton (LA) is applied to interact with the environment and continuously adjust the probability of selecting beams to accelerate the convergence speed of ND algorithms. Besides， an efficient ND algorithm in the neighbor maintenance phase is designed， which applies the Kalman filter to predict node movement. Simulation results show that the LA-based ND algorithm reduces the ND time by up to 32% compared with the Scan-Based Algorithm (SBA)， which proves the efficiency of the proposed ND algorithms.

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Load-Aware Offloading Strategy in Two-Tier Heterogeneous Network

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China Communications 2016年第8期13卷 148-158页

作者： Jianyuan Feng Zhiyong Feng zhiqing wei Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications

Although small cell offloading technology can alleviate the congestion in macrocell, aggressively offloading data traffic from macrocell to small cell can also degrade the performance of small cell due to the heavy load. Because of collision and backoff, the degradation is significant especially in network with contention-based channel access, and finally decreases throughput of the whole network. To find an optimal fraction of traffic to be offloaded in heterogeneous network, we combine Markov chain with the Poisson point process model to analyze contention-based throughput in irregularly deployment networks. Then we derive the close-form solution of the throughput and find that it is a function of the transmit power and density of base *** on this, we propose the load-aware offloading strategies via power control and base station density adjustment. The numerical results verify our analysis and show a great performance gain compared with non-load-aware offloading.

关键词： heterogeneous networks offloading strategies load-aware Poisson point process Markov chain throughput maximization CSMA

Cognitive information metrics for cognitive wireless networks

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Chinese Science Bulletin 2014年第17期59卷 2057-2064页

作者： Zhiyong Feng zhiqing wei Qixun Zhang Ping Zhang Key Laboratory of Universal Wireless Communications Ministry of EducationWireless Technology Innovation Institute (WTI)Beijing University of Posts and Telecommunications

Considering the dynamic changes and uncertainty features of the radio environment in cognitive wireless networks(CWNs),the environment cognition ability is critical for the performance evaluation of CWNs design and ***,there are no effective metrics to evaluate the ability and gain of information cognition in CWNs from an information theory ***,the novel cognitive information concept is proposed and defined as a metric to evaluate the uncertainty of both the internal and external environments of one system that can be removed by other systems or nodes using cognitive radio *** an intelligent wireless communication system that is aware of its surrounding radio,network,and user multi-domains environment,the more cognitive information it achieves,the higher level cognitive capability it *** this paper,we define and analyze the mathematical features of cognitive *** reveal that the increase of cognitive information can improve the spectrum efficiency and reduce the interference probability simultaneously in *** cognitive information can be regarded as a metric for CWNs ***,we apply the theory of cognitive information in the parameters optimization in energy detection and cooperative spectrum sensing.

关键词：信息理论无线网络度量无线通信系统无线电环境高频谱效率认知能力参数优化

Fractal theory based dynamic mesh grouping scheme for efficient cognitive pilot channel design

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Chinese Science Bulletin 2012年第28期57卷 3684-3690页

作者： FENG ZhiYong wei zhiqing ZHANG QiXun ZHANG Ping Wireless Technology Innovation Institute(WTI) Key Laboratory of Universal Wireless CommunicationsMinistry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

As one of the key characteristics in cognitive wireless networks(CWNs),network environment awareness techniques have received much attention *** of traditional spectrum sensing technology that suffers from problems of miss detection,false alarm,hidden node,and inefficiency,cognitive pilot channel(CPC) technology has been proposed as one of the candidate solutions for an efficient and accurate network information delivery scheme to user equipment(UE).The aim of the CPC technology is to provide the necessary information for the reconfiguration of the UE using the public signaling *** ensure the efficient information delivery,the whole geographical area covered by the CPC is divided into square meshes of the same ***,two typical network information transmission modes for CPC deployment are also proposed:broadcast CPC mode and on-demand CPC *** further improve the efficiency of network information delivery,an efficient dynamic mesh grouping scheme has been designed which is based on the fractal theory for the broadcast CPC mode,where adaptive rectangular sized meshes are used to approximately cover the whole *** to the traditional fixed size mesh division strategy,results show that the proposed dynamic mesh grouping scheme significantly reduces the number of meshes by grouping similar meshes together,and the average delay of receiving CPC information on the UE side is therefore reduced.

关键词：分形理论导频信道动态网分组设计无线网络信息传送方形网格