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2015 IEEE 16th International Conference on communication technology(ICCT 2015)

作者： Xiaofeng Xu Caowei Wang Science and Technology on Communication Information Security Control Laboratory Beijing University of Posts and Telecommunications

Interference alignment(IA) is a promising technique to effectively mitigate interference in wireless communication *** this paper,a novel IA based scheme is proposed,which is jointed design of transmit precoding matrices and receive beam forming matrices for the three-cell multiple-input multiple-output(MIMO).Gaussian interfering broadcast channels(MIMO-IFBC) with constant channel between each node,where each base station(BS) is equipped with M antennas,each mobile station(MS) is equipped with N antennas on the cell boundary,and each BS sends d data streams to each user in its *** corresponds to a down link scenario for cellular networks,where K users with the user cooperation in each *** is also analytically shown that total 3Kd degrees of freedom(Do F)is achievable if M = N≥*** simulations demonstrate the sum-rate of our proposed scheme also out performs those of conventional techniques,especially in the high signal-to-noise ratio(SNR)regime.

关键词： Interference Alignment Degrees of Freedom Multi-User MIMO Eigenvector Solution

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Uncertain dynamic skyline queries for uncertain databases

Uncertain dynamic skyline queries for uncertain databases

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： ZhiBang Yang XiaoNiu Yang Xu Zhou Science and Technology on Communication Information Security Control Laboratory Zhejiang Jiaxing 314001 China Science and Technology on Communication Information Security Control Laboratory Zhejiang Jiaxing China College of Mathematics and Information Engineering Jiaxing University Zhejiang Jiaxing China

ISBN: (纸本)9781467376839

In this paper, we research the relationship between the probabilistic products and customer preferences, which has not been studied before. In order to find out products which can meet a customer's maximum demand, we present an uncertain dynamic skyline (UDS) query, and propose effective pruning strategies to reduce the search space of the UDS query processing. In addition, effective algorithms are presented by integrating the proposed pruning strategies. Extensive experiments illustrate the efficiency and effectiveness of our proposed algorithms with a variety of experiments settings.

关键词： Probabilistic logic Vehicle dynamics Heuristic algorithms Vehicles Databases information security Context

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Profiling and identifying users' activities with network traffic analysis

Profiling and identifying users' activities with network tra...

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

作者： Ma Tao Ye Chun Ming Chen Juan Science and Technology on Communication Information Security Control Laboratory Jiaxing China Army Officer Academy Hefei China

ISBN: (纸本)9781479983544

Traffic identification technique is used for classification of different network protocols and applications even with detection of users' network activities. In this paper, we conduct our study on some typical users' network activities and present a traffic identification method to describe the feature about users' behaviors. We convert users' network activities information into different sequences with frame size and inter-arrival time just like HMM model does. Then we use latent dirichlet allocation model to extract potential characterization from these activity sequences. We use some machine learning algorithms to classify different activities in the data, and we suggest a method to evaluate the mixed activities within a sequence. Our research shows that it is possible to distinguish exact users' on-line activities without inspection to packet payloads, and users' privacy may need more protection against traffic analysis.

关键词： Hidden Markov models Protocols Entropy Payloads Computers Accuracy Feature extraction

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A new important-place identification method

A new important-place identification method

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International Conference on Computer and communications (ICCC)

作者： Chun-lai Ma Tao Ma Hong Shan Electronic Engineering Institute Hefei China Science and Technology on Communication Information Security Control Laboratory Hefei China

ISBN: (纸本)9781467381277

For the problem that the location of LBSN users was sparse because of it was updated sporadically. An important place identification method was studied by improving the clustering algorithm. Firstly, a velocity pruning algorithm was applied to remove interference points from source data. Secondly, clustering algorithm based on density peak named CFSFDP was selected. To solve the problem that it is unable to decide the cluster number with CFSFDP, an improved algorithm was presented. With a cluster center automatic choosing strategy, the algorithm searched for the `turning points' with the trends of cluster center weights changing. Then we could regard a set of points which weight is bigger than turning points' as cluster center. As a result, the error brought by ruling in the Decision Graph could be avoided with the strategy. Thirdly, reverse geocoding technology was applied to translate coordinate in semantic place. Check-in data of Foursquare user was set as an example in experiment, the result show that the improved algorithm had higher accuracy rate and lower computation compared to CFSFDP and DBSCAN. It also proved that the feasibility and effectiveness of the method proposed in the paper.

关键词： Clustering algorithms Algorithm design and analysis Turning Market research Social network services Global Positioning System Target tracking

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On the achievability of interference alignment for three-cell MIMO interfering broadcast channel

On the achievability of interference alignment for three-cel...

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International Conference on communication technology (ICCT)

作者： Xiaofeng Xu Caowei Wang Science and Technology on Communication Information Security Control Laboratory JiaXing China Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781467370066

Interference alignment (IA) is a promising technique to effectively mitigate interference in wireless communication systems. In this paper, a novel IA based scheme is proposed, which is jointed design of transmit precoding matrices and receive beam forming matrices for the three-cell multiple-input multiple-output (MIMO). Gaussian interfering broadcast channels (MIMO-IFBC) with constant channel between each node, where each base station (BS) is equipped with M antennas, each mobile station (MS) is equipped with N antennas on the cell boundary, and each BS sends d data streams to each user in its cell. This corresponds to a down link scenario for cellular networks, where K users with the user cooperation in each cell. It is also analytically shown that total 3Kd degrees of freedom (Do F) is achievable if M = N ≥ 2Kd. The simulations demonstrate the sum-rate of our proposed scheme also out performs those of conventional techniques, especially in the high signal-to-noise ratio (SNR) regime.

关键词： Antennas MIMO Libraries Interference

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The identification algorithm of network key role based on behavior accumulation 10

The identification algorithm of network key role based on be...

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10th International Conference on Wireless communications, Networking and Mobile Computing, WiCOM 2014

作者： Xu, Xiaofeng Li, Xiao Science and Technology on Communication Information Security Control Laboratory Jiaxing China Chinese Electronic Technology Group Corporation No.36 Institute Jiaxing China

ISBN: (纸本)9781849198455

Role identification for network user plays a very important role in function and behaviour network analysis against criminal groups. Therefore, a network key role identification algorithm based on behaviour accumulation is proposed in the paper. Firstly, behaviour attribution of node (user) in network instance is extracted in the algorithm, description and abstraction of user behaviour by vector mode is performed, simultaneously, K mean algorithm is adopted to make clustering analysis for user behaviour;on the basis of conditions described as above, Hybrid Ant-Colony Algorithm (HBACA) is modified to search relationships between variety of grouping sets in the network instance, and identify each user role in the performing process of network instance. Simulation result shows that the algorithm can extract internal relations of communication behaviours between each network member, in order to obtain key role in a specific network instance.

关键词： Clustering algorithms

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An improved algorithm for minimum connected dominating sets in ad hoc networks

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ICIC Express Letters, Part B: Applications 2015年第1期6卷 201-206页

作者： Yang, Hong-Wa Yang, Xiao-Niu Li, Xin-Feng Lu, Zhe-Ming Science and Technology on Communication Information Security Control Laboratory Jiaxing China School of Aeronautics and Astronautics Zhejiang University No. 38 Zheda Road Hangzhou China

Given a graph, a connected dominating set is a subset of vertices such that every vertex is either in the subset or adjacent to a vertex in the subset and the subgraph induced by the subset is connected. A minimum connected dominating set (MCDS) is such a subset with the smallest possible cardinality. MCDS is popularly used for constructing virtual backbones for broadcasting in ad hoc networks. In this paper, we add breath-first-search in Phase II of Alzoubi’s distributed connected dominating set algorithm. The improved algorithm can find MCDS in both connected and disconnected graphs while the original algorithm can only be applied to connected graphs.

关键词： Ad hoc networks

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Using MATSim to simulate carpooling and car-sharing trips

Using MATSim to simulate carpooling and car-sharing trips

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World Congress on information technology and Computer Applications

作者： Hedi Ayed Djamel Khadraoui Riad Aggoune Science and Technology on Communication Information Security Control Laboratory Jiangnan Electronic Communication Research Institute Jiaxing China College of Information and Control Engineering China University of Petroleum (East China) Qingdao China

ISBN: (纸本)9781467366373

The car still represents the bulk of urban transport in large cities. However the weight of the car tends to be reduced as a result of public policies, the emergence of new transport alternatives and the increasing cost of use of private vehicles. Public transport are not enough to resolve the problems of urban mobility and soft modes (walking and cycling) being relevant only for short distances and mild weather conditions. Nowadays, the collaborative models (carpooling and car-sharing) are increasingly popular and appear among the possible solutions. In this paper, we present new extensions of MATSim to support modeling and simulating carpooling and car-sharing trips. The new modules are totally integrated in MATSim and we carried out a validation study of our results with real data collected in the Grater Region.

关键词： Carpooling car-sharing MATSim

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A Method of the Detection of Frequency-hopping Signal Based on Channelized Receiver in the Complicated Electromagnetic Environment

A Method of the Detection of Frequency-hopping Signal Based ...

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International Conference on Intelligent information Hiding and Multimedia Signal Processing

作者： Yi-jia Zhang Rui-ying Liu Hua-jun Song Science and Technology on Communication Information Security Control Laboratory Jiangnan Electronic Communication Research Institute Jiaxing China College of Information and Control Engineering China University of Petroleum (East China) Qingdao China

ISBN: (纸本)9781509001897

A new method is studied and designed in this paper to strengthen the adaptability and practicability of frequency-hopping (FH) signal detection under the complicated electromagnetic environment. The proposed method includes four processing algorithms: channelization, estimation of the background noise, selection of the FH channel, and FH signal detection. Through this method, FH signals can be effectively detected under the complicated environment even with strong interference. The simulation and results suggest this method improves the accuracy of FH signal detection and signal-to-noise ratio greatly.

关键词： complicated electromagnetic environment channelization FH signal detection strong interference channelized receiver FH signal detection

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Topology analysis of wireless mesh network based on 802.11a

Topology analysis of wireless mesh network based on 802.11a

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Chinese control and Decision Conference, CCDC

作者： Yi-jia Zhang Jun Sun Science and Technology on Communication Information Security Control Laboratory Jiaxing 314033 China China Electronics Technology Group Corporation No.36 Institute Jiaxing 314033 China

ISBN: (纸本)9781479970186

The system architecture, analysis process and the key technology and test results of the topology analysis system, which based on wireless Mesh network are introduced in this paper. This paper is achieved the 802.11a protocol analysis and positioning method based on signal strength, and the method of links analysis based on the business statistics is proposed. The practical wireless mesh network based on 802.11a is set as test environments, then the network topological analysis and the drawing of topological graph are finished after the design and achievement of wireless Mesh network's topology analysis system.

关键词： Electronic mail Network topology Topology Wireless mesh networks Radar tracking Sun information security

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