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Price and customer satisfaction based access control scheme

Journal of Computational Information Systems 2014年第5期10卷 1893-1902页

作者： Zhang, Dengyin Wang, Xuemei Li, Dacheng Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China

To solve the fairness problem in user access of mobile communication systems, we proposed an access control scheme based on price and customer satisfaction (PSAC) in this paper. In the scheme, we borrow Cobb-Douglas ordinal utility model to designate a price function which changes with the current system load and service transmission rate, and evaluate customer satisfaction according to waiting time and allocated bandwidth. The system accepts requests in the descending order of these requests' access probability, the calculation of which depends on price and customer satisfaction. Simulation results show that the PSAC algorithm we proposed can achieve high resource utilization, enhance the overall revenue, and ensure the fairness of the user access. © 2014 Binary Information Press.

关键词： Customer satisfaction

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Optical encryption scheme based on ghost imaging with disordered speckles

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Chinese Physics B 2017年第5期26卷 160-164页

作者：张玉东赵生妹 Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing 210003 China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing 210003 China

An optical encryption scheme based on a ghost imaging system with disordered speckles is proposed to obtain a higher security with a small key. In the scheme, Alice produces the random speckle patterns and obtains the detection results with the help of a computational ghost imaging（CGI） system. Then Alice permutes the order of the random speckle patterns and shares the permutation sequence as a secure key to the authorized users. With the secure key, Bob could recover the object with the principle of the CGI system, whereas, the unauthorized users could not obtain any information of the object. The numerical simulations and experimental results show that the proposed scheme is feasible with a small key, simultaneously,it has a higher security. When the eavesdropping ratio（ER） is less than 40%, the eavesdropper cannot acquire any useful information. Meanwhile, the authorized users could recover completely with the secure key.

关键词： ghost encryption secure speckle recover authorized disordered users reconstructed PSNR

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Optimal entanglement concentration for three-photon W states with parity check measurement

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Chinese Physics B 2013年第2期22卷 97-104页

作者：周澜盛宇波赵生妹 College of Mathematics & Physics Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education National Laboratory of Solid State Microstructures Nanjing University

We present an efficient entanglement concentration protocol（ECP） for the less-entangled W state with some identical conventional polarized single *** the protocol,two of the parties say Alice and Charlie should perform the parity check measurements and they can ultimately obtain the maximally entangled W state with a certain success ***,they can obtain another less-entangled W state,which can be reconcentrated into the maximally entangled W *** iterating this ECP,a high success probability can be *** ECP may be an optimal one and it is useful in current quantum information processing.

关键词： quantum communication entanglement entanglement concentration

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Multidimensional reconciliation protocol for continuous-variable quantum key agreement with polar coding

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Science China(Physics,Mechanics & Astronomy) 2018年第9期61卷 99-102页

作者： ShengMei Zhao ZhiGang Shen Hong Xiao Le Wang Institute of Signal Processing Transmission Nanjing University of Posts and Telecommunications Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education

Continuous-variable quantum key distribution（CVQKD）[1-7]allows two remote parties（Alice and Bob）to share a secret key,even in the presence of an eavesdropper（Eve）with unlimited computational power[8-17].While,a highly efficient reconciliation protocol[18-21]is crucial in a CVQKDsystem, which can not only extract the errorless secret keys, but also provide a promising way to achieve a long distance CVQKD at a low signal-to-noise ratio （SNR）.

关键词：和解协议连续变量钥匙多维编码 SNR 长距离

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Green cloud task-scheduling algorithm based on improved BPSO

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Journal of Information and Computational Science 2014年第12期11卷 4301-4308页

作者： Ouyang, Zhiyou Wang, Kun Xu, Lili Key Lab. of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing China

Cloud computing is experiencing a rapid development since a large amount of data need to be addressed. How to carry on the reasonable task scheduling plays a vital role in the operating efficiency of cloud computing. This paper proposes a Green Cloud Task-scheduling Algorithm (GCTA) based on the improved Binary Particle Swarm Optimization (BPSO). This work avoids matrix operations by using a pipeline number for virtual machines and redefining the position and velocity of particle. Simulation results show that the proposed GCTA has less execution time, and reduces resource consumption accordingly. © 2014 Binary Information Press

关键词： Cloud computing

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Manufacturing enterprise collaboration network:An empirical research and evolutionary model

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Chinese Physics B 2020年第8期29卷 553-563页

作者： Ji-Wei Hu Song Gao Jun-Wei Yan Ping Lou Yong Yin School of Information Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Broadband Wireless Communication and Sensor Wuhan University of TechnologyWuhan 430070China

With the increasingly fierce market competition,manufacturing enterprises have to continuously improve their competitiveness through their collaboration and labor division with each other,*** manufacturing enterprise collaborative network(MECN)through their collaboration and labor division is an effective guarantee for obtaining competitive *** explore the topology and evolutionary process of MECN,in this paper we investigate an empirical MECN from the viewpoint of complex network theory,and construct an evolutionary model to reproduce the topological properties found in the empirical ***,large-size empirical data related to the automotive industry are collected to construct an *** analysis indicates that the MECN is not a scale-free network,but a small-world network with ***-world property indicates that the enterprises can respond quickly to the market,but disassortativity shows the risk spreading is fast and the coordinated operation is ***,an evolutionary model based on fitness preferential attachment and entropy-TOPSIS is proposed to capture the features of ***,the evolutionary model is compared with a degree-based model in which only node degree is taken into *** simulation results show the proposed evolutionary model can reproduce a number of critical topological properties of empirical MECN,while the degree-based model does not,which validates the effectiveness of the proposed evolutionary model.

关键词： manufacturing enterprise collaboration network complex network topological properties fitness preferential attachment

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A resilient trust management scheme for defending against reputation time-varying attacks based on BETA distribution

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Science China(Information Sciences) 2017年第4期60卷 60-70页

作者： Weidong FANG Wuxiong ZHANG Yang YANG Yang LIU Wei CHEN Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai Research Center for Wireless Communication School of Computer Science and Technology China University of Mining and Technology

Compared with the encryption and the authentication which can prevent the external attacks,the trust management schemes are the better approaches for defending against the internal attacks in wireless sensor network(WSN). The reputation time-varying(RTV) attacks are internal attacks. In the reputation timevarying attacks, the reputation value of nodes is manipulated to adjust dynamically by the compromised nodes or malicious attackers. Hence, these attacks have greater covert and invasive. In this paper, we propose a Timewindow-based Resilient Trust Management Scheme(TRTMS) to defend against the reputation time-varying attacks in wireless sensor network. In this scheme, based on BETA distribution, the behaviors of compromised nodes are analyzed for a period of time, and then the difference judgment and the trend analysis are utilized to identify the abnormality of nodes’ reputation value, meanwhile, the control factor Fc and the time window are introduced to verify and remove the compromised modes from the suspected malicious nodes, which refer to those nodes’ reputation value changes are caused by the wireless channel changes. The result of simulation shows that our proposed scheme can defend reputation time-varying attacks effectively and it is convenient to implement.

关键词： wireless sensor network(WSN) reputation time-varying attack trust value trust management time window

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Compressed ghost imaging based on differential speckle patterns

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Chinese Physics B 2020年第2期29卷 294-300页

作者： Le Wang Shengmei Zhao Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications(NUPT)Nanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(NUPT) Ministry of EducationNanjing 210003China

We propose a compressed ghost imaging scheme based on differential speckle patterns,named *** the scheme,a series of bucket detector signals are acquired when a series of random speckle patterns are employed to illuminate an unknown *** the differential speckle patterns(differential bucket detector signals)are obtained by taking the difference between present random speckle patterns(present bucket detector signals)and previous random speckle patterns(previous bucket detector signals).Finally,the image of object can be obtained directly by performing the compressed sensing algorithm on the differential speckle patterns and differential bucket detector *** experimental and simulated results reveal that CGI-DSP can improve the imaging quality and reduce the number of measurements comparing with the traditional compressed ghost imaging schemes because our scheme can remove the environmental illuminations efficiently.

关键词： ghost imaging compressed sensing differential speckle patterns differential bucket detector signals

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Improving the purity of heralded single-photon sources through spontaneous parametric down-conversion process

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Chinese Physics B 2021年第7期30卷 63-69页

作者： Jing Wang Chun-Hui Zhang Jing-Yang Liu Xue-Rui Qian Jian Li Qin Wang Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Broadband Wireless Communication and Sensor Network Technology Key Laboratory of Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

The high-purity single-photon source plays an important role in the field of quantum ***,it is generated through spontaneous parametric down-conversion *** this paper,we investigate and summarize a few approaches on obtaining single-photon sources with a high purity using either PPKTP or PPLN nonlinear ***,we present improved schemes to increase the purity based on existing work,corresponding applicable conditions and procedures are discussed and ***,we carry out numerical simulations and show that nearly perfect purity can be reached even without using any ***,this work might provide valuable references for the generation and application of high purity single-photon sources.

关键词： quantum information quantum communication nonlinear optics

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The research on joint distributed source coding and network coding for wireless multicast network

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Journal of Computational Information Systems 2013年第3期9卷 1147-1156页

作者： Liu, Ying Yang, Zhen Mei, Zhonghui Kong, Yuanyuan Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China

This paper considers the problem of transmitting correlated information from multiple sources to multiple receivers, where every receiver seeks to recover all of the original sources. In order to improve the efficiency of network transmission, we combine interflow network coding and distributed source coding using syndromes (DISCUS). Furthermore, for wireless multicast multi-hop network, we propose an adaptive transmission algorithm with target of minimum energy consumption based on the above practical joint scheme. The simulation results verify the validation of theoretical results in the paper. Copyright © 2013 Binary Information Press.

关键词： network coding

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