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第11届分布式计算及其应用国际学术研讨会

作者： Junqing Zhang Ruchuan Wang Yisheng Qian Qianyi Wang College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education

The main study of traditional probability coverage problem in wireless sensor networks(WSNs) is aiming at twodimensional space, however, most practical applications of wireless sensor network is placed in a three-dimensional sensor networks. Therefore, probability model is introduced for three-dimensional WSNs. This paper presents a method that using Voronoi divide to control the Scheduling of the probability model nodes in the target area. Also, a coverage control algorithm based on probability model(PMCCA) is proposed. We verify the effectiveness and the practice of PMCCA algorithm by comparing PMCCA algorithm to another algorithm in simulation experiment.

关键词： wireless sensor networks three-dimensional coverage probability model Voronoi divide

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An improved packet sending algorithm based on LTP in Delay Tolerant networks

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Journal of Computational Information Systems 2014年第12期10卷 5279-5286页

作者： Liu, Yan Wang, Kun Xu, Lili Yu, Yue Ouyang, Zhiyou College of Automation and Electrical Engineering Nanjing University of Technology Nanjing 210009 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing 210003 China

In DTN (Delay Tolerant networks), bundle and block shred data to cope with frequent interruption. However, it remains a problem of what impact will be generated on transmission efficiency by the size of bundle and block as well as how to achieve maximum efficiency by adjusting Bundle and block size in terms of environment. This paper focuses on Bundle and LTP (Licklider Transmission Protocol) in transmission layer of DTN and the impact of block size on transmission efficiency. Then a packet sending algorithm is proposed that dynamically varies its strategy to achieve the best transmission efficiency. Finally, simulation results illustrate the advantages of our proposed scheme. Meanwhile, selecting optimum size of block in proposed algorithm can increase the transmission efficiency. 1553-9105/Copyright © 2014 Binary Information Press.

关键词： Delay tolerant networks

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P2P traffic identification method based on an improvement incremental SVM learning algorithm

P2P traffic identification method based on an improvement in...

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International Symposium on wireless Personal Multimedia communications (WPMC)

作者： Jing Gong Wenjun Wang Pan Wang Zhixin Sun Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education (Nanjing University of Posts and Telecommunications Nanjing China

ISBN: (纸本)9781479964123

How to classify the data sets with vast information amount and large distribution fluctuation, which is always the research hotspot. This paper puts forward an improved SVM incremental learning algorithm by comparing the different incremental learning methods of SVM algorithm. In the algorithm, whether to violate the KTT conditions is regarded as an important basis for incremental data set. And the algorithm will be more efficient on the classification of SVM incremental sets through optimizing and improving itself. Then the paper compares the SVM-based re-training algorithm, the standard SVM incremental learning algorithm and the improved SVM incremental learning algorithm through identifying P2P network traffic. The experimental results show that the improved SVM incremental learning algorithm proposed in this article can save storage space and increase the accuracy of the identification of P2P traffic.

关键词： Classification algorithms Support vector machines Algorithm design and analysis Training Standards Accuracy Data models

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Practical quantum key distributions with single-photon-added coherent sources

Practical quantum key distributions with single-photon-added...

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第十六届全国量子光学学术报告会

作者： Dong Wang Zheng-Fu Han Guang-Can Guo Feng Zhu Qin Wang Key Lab of Quantum Information University of Science and Technology of ChinaCAS Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and TelecommunicationsMinistry of Education

We propose new schemes on implementing the single-photon-added coherent source in the quantum key *** apply the source in either the standard BB84 protocol or the new proposed measurement-device-independent quantum ke... 详细信息

关键词： Practical quantum key distributions with single-photon-added coherent sources

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Secure Efficient Routing Based on network Coding in the Delay Tolerant networks

Secure Efficient Routing Based on Network Coding in the Dela...

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2014 IEEE 5th International Conference on Software Engineering and Service Science

作者： Jianmin Bao Shu Zhang Junjie Zhang Kun Wang Haifeng Hu Key Lab of Broadband Wireless Communication and Sensor Network Technology （Nanjing Univ. of Posts and Telecommunications） Ministry of Education Nanjing University of Posts and Telecommunications

The Delay/Disruption Tolerant network（DTN） is characterized with long delay,high bit-error rate,intermittent connectivity and frequent *** to this,network coding is introduced to improve its transmission performance *** DTN routing algorithms based on network coding have been ***,they are susceptible to various malicious *** this paper,we propose a new kind of networking scheme suitable to the DTN,which can resist the eavesdropping attacks to a certain ***,we establish a DTN network model based on the packet path optimization allocation algorithm and redefine the packet format to meet the algorithm ***,to resist the dropping attacks,the source node dynamically adds redundancy factors at the certain *** the pollution attacks and the data tampering attacks can almost be resisted by means of mutual authentication between intermediate *** approach avoids the traditional anti-tampering attack algorithm over-reliant on the source *** security analysis and simulation results show that our scheme can effectively resist the joint attacks and optimize the network performance.

关键词： delay tolerant networks（DTNs） network coding joint-attack

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Mixed-norm subspace pursuit algorithm for compressed sensing in the presence of impulsive noise

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Journal of Computational Information Systems 2014年第13期10卷 5637-5648页

作者： Ji, Yunyun Yang, Zhen College of Communication and Information Engineering Nanjing University of Posts and Telecommunications Nanjing China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing China

The subspace pursuit algorithm in compressed sensing cannot achieve desirable reconstruction performance in the presence of impulsive noise based on the fact that the support detection and least squares are not robust to the impulsive noise. And then we propose a mixed-norm subspace pursuit algorithm to achieve sparse reconstruction in the impulsive noise environment. The mixed-norm subspace pursuit algorithm takes advantage of mutual influence of two different residuals to iteratively improve the performance of support detection and measurement set detection. It has significant characteristics: effectiveness in additive Gaussian white noise environment and robustness to impulsive noise, which have been verified by theoretical and experimental results. © 2014 by Binary Information Press

关键词： Compressed sensing

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A Model-Matching Algorithm Based on Improved BP over Out-of-order Streams

A Model-Matching Algorithm Based on Improved BP over Out-of-...

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IEEE International Conference on communications

作者： Kun Wang Linchao Zhuo Lei Shu Yanfei Sun Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing China Guangdong Provincial Key Lab. of Petrochemical Equipment Fault Diagnosis Guangdong University of Petrochemical Technology Guangdong China

Due to the explosive increment of data in big data era, it is a challenging task to analyze and extract meaningful data for users. Data needs to be timely operated because of the time sensitivity, so it faces enormous pressure in storage and computing. To deal with the problem that it is hard to achieve valuable information from out-of-order streams over big data in short time, a model-matching algorithm based on improved BP (Back Propagation) is proposed. In the algorithm, the matching model is set dynamically. Information is extracted for users according to the order of data's arriving time. Furthermore, the algorithm parameters are automatically adjusted in the process of learning and matching. Accordingly, the responding speed of learning is accelerated and the time of matching reduces. In the simulation, a group of optimum parameters of improved BP are achieved by using self-adapting adjusting mechanism. The threshold (TH), connecting weight (CW) and learning rate (LR) are equal to 1.5, 3 and 1, respectively. We implement our model-matching algorithm on 10000 sets of out-of-order streams with these parameters. Results indicate that the proposed algorithm can obviously improve the accuracy and speed of matching and achieve better stability.

关键词： Heuristic algorithms Mathematical model Out of order Convergence Accuracy Data models Software algorithms

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QoE-driven scheme for multimedia content dissemination in Device-to-Device communication

QoE-driven scheme for multimedia content dissemination in De...

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International wireless communications and Mobile Computing Conference, IWCMC

作者： Aiqing Zhang Liang Zhou Lei Wang Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications China National Mobile Communications Research Laboratory Southeast University

Device-to-Device (D2D) communication has been proposed to be a promising data offloading solution in the coming big data age, with multimedia dominating the digital contents. As quality of experience (QoE) is the major determining factor in the success of new multimedia applications, we novelly propose a QoE-driven cooperative content dissemination (QeCS) scheme in the paper. Specifically, all the users predict the QoE of the potential connections characterized by mean opinion score (MOS) and send the results to the content provider (CP). Then CP formulates a weighted oriented graph based on the network topology and MOS of each potential connection. By factorizing the graph, the content dissemination fashion is established through seeking 1-factor with the maximum weight thus achieving maximum total user MOS.

关键词： Peer-to-peer computing Receivers Transmitters Yttrium Multimedia communication Mobile communication Graph theory

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Compressive wideband spectrum sensing in CRNS under primary user emulation attack 10

Compressive wideband spectrum sensing in CRNS under primary ...

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10th International Conference on wireless communications, networking and Mobile Computing, WiCOM 2014

作者： Cao, K.T. Shao, H.Q. National Mobile Communications Research Laboratory Southeast University Nanjing China Key Lab of Broadband Wireless Commun. and Sensor Network Technology of the State Education Ministry Nanjing University of Posts and Telecommunications Nanjing China College of Software Beihang University Beijing China

ISBN: (纸本)9781849198455

Spectrum sensing in a wideband regime for cognitive radio network (CRN) faces considerably technical challenge due to the constraints on ADCs, especially in the presence of primary user emulation attack (PUEA) where some malicious users try to impersonate the primary user (PU) to prevent other secondary users (SUs) from accessing the idle spectrum. To address this issue, an eigenvalue-based compressive wideband spectrum sensing (ECWSS) scheme is proposed in this paper. ECWSS directly utilizes the compressive measurements based on compressive sampling (CS) theory to perform wideband spectrum sensing without requiring signal recovery. In ECWSS, the sensors around a SU carry out compressive sampling at the sub- Nyquist rate instead of the SU. Furthermore, the exact probability density function of extreme eigenvalues is used to set the threshold. Theoretical analysis and simulation results show that compared to the traditional sensing scheme, ECWSS has better detection performance and is more robust in the existence of PUEA.

关键词： Compressed sensing

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Secure efficient routing based on network coding in the delay tolerant networks

Secure efficient routing based on network coding in the dela...

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IEEE International Conference on Software Engineering and Service Sciences (ICSESS)

作者： Jianmin Bao Shu Zhang Junjie Zhang Kun Wang Haifeng Hu Key Lab of Broadband Wireless Communication and Sensor Network Technology (Nanjing Univ. of Posts and Telecommunications) Nanjing University of Posts and Telecommunications Nanjing Jiangsu Province China

The Delay/Disruption Tolerant network (DTN) is characterized with long delay, high bit-error rate, intermittent connectivity and frequent partitions. Due to this, network coding is introduced to improve its transmission performance significantly. Numerous DTN routing algorithms based on network coding have been developed. However, they are susceptible to various malicious attacks. In this paper, we propose a new kind of networking scheme suitable to the DTN, which can resist the eavesdropping attacks to a certain extant. Firstly, we establish a DTN network model based on the packet path optimization allocation algorithm and redefine the packet format to meet the algorithm requirements. Meanwhile, to resist the dropping attacks, the source node dynamically adds redundancy factors at the certain time. Then the pollution attacks and the data tampering attacks can almost be resisted by means of mutual authentication between intermediate nodes. This approach avoids the traditional anti-tampering attack algorithm over-reliant on the source node. The security analysis and simulation results show that our scheme can effectively resist the joint attacks and optimize the network performance.

关键词： Routing network coding Delays Mathematical model Encoding Equations Security

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