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International Conference on communications, Circuits and Systems (ICCCAS)

作者： Guoqing Xia Wei Xia Ming Xie Huiyong Li School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu Sichuan China Science and Technology on Electronic Information Control Laboratory Chengdu Sichuan China

ISBN: (纸本)9781538693902

We propose a robust null broadening algorithm incorporated with the covariance matrix taper (CMT) for the dual-polarized sensitive arrays (DPSAs) in space-time domain to mitigate the performance degradation of traditional anti-jamming schemes in high dynamic scenarios. Compared to spatial null broadening for DPSAs, our proposed algorithm could suppress those wide-band interferences as well as narrow-band interferences, even if those interferences with the same azimuths and frequency bands as the desired navigation signals. Simulations verify the robustness and effectiveness of the proposed algorithm.

关键词： Azimuth Interference Covariance matrices Heuristic algorithms Global navigation satellite system Linear antenna arrays

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A New Construction Method of Regeneration Tree for Single Node Fault Repair Mechanism in Distributed Storage System

A New Construction Method of Regeneration Tree for Single No...

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International Conference on Computational Intelligence and security

作者： Wei Guo Yong Wang Miao Ye School of Computer Science and Information Security Guilin University of Electronic Technoloay Guilin Guangxi China Guangxi Cooperative Innovation Center of Cloud Computing and Big Data Guilin University of Electronic Technology Guilin Guangxi China Guangxi Colleges and Universities Key Laboratory of Cloud Computing and Complex Systems Guilin University of Electronic Technology Guilin Guangxi China School of Information and Communication Guilin University of Electronic Technology Guilin Guangxi China

ISBN: (数字)9781728160924

ISBN: (纸本)9781728160931

Comparing with the classic redundancy policy of multi-replica technology, Erasure code is preferred due to its higher utilization rate of storage space in distributed storage system. As one kind of the important Erasure code, the traditional regeneration code with star recovery topology cost more time and more network bandwidth in the data recovery process. An efficient approach to reduce the delay time and network consumption is to construct an optimal recovery tree with the best possible bottleneck bandwidth, which is proved to be a Non-deterministic Polynomial problem. To solve this problem, this paper proposed a hybrid genetic algorithm which utilizes the designed crossover operation and mutation operation according to the problem property. A series of experiments have been conducted and the results show that our proposed method has good convergent ability and reduce the regeneration time.

关键词： Topology Bandwidth Genetic algorithms Encoding Network topology Sociology Statistics

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Performance evaluation of ad-hoc routing protocols in hybrid MANET-satellite network 3rd

Performance evaluation of ad-hoc routing protocols in hybrid...

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3rd International Conference on Machine Learning and Intelligent communications, MLICOM 2018

作者： Xie, Xiaoye Wang, Jian Guo, Xiaobo Wu, Xiaogang Nanjing University Nanjing China Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory The 54th Institute of CETC ShijiazhuangHebei China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation 19 Chengxin Road Nanjing China

ISBN: (纸本)9783030005566

Hybrid MANET-satellite network is a natural evolution in achieving ubiquitous communication. Their combination gives full play to respective advantages—autonomy and flexibility of MANET, wide coverage and resilience to natural disasters of satellite network. Although large quantities of researches have been conducted on hybrid MANET-satellite network, there are relatively few researches on its routing. In this paper, we construct a basic model of hybrid MANET-satellite network and explore the performance and applicability of ad-hoc routing protocols in hybrid network. Simulation results by NS3 demonstrate that the hybrid network working in ad hoc manner can acquire the performance that conforms to the standard of QoS. © ICST Institute for Computer sciences, Social Informatics and Telecommunications Engineering 2018.

关键词： Satellites

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Humidity error compensating of MEMS gyros based on a daptive threshold denoising and RBF neural network 37

Humidity error compensating of MEMS gyros based on a daptive...

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37th Chinese control Conference, CCC 2018

作者： Xin-Wang, Wang Xiao-Lin, Shen Hui-Liang, Cao Bo-Wen, Deng North University of China School of Electrical and Control Engineering Taiyuan030051 China North University of China Science and Technology on Electronic Test Measurement Laboratory Taiyuan030051 China North University of China School of Information and Communication Engineering Taiyuan030051 China

ISBN: (纸本)9789881563941

The large random errors in a typical MEMS gyros under the ranges of relative humidity condition. In order to solve the large random error under the ranges of relative humidity, a method based on adaptive threshold denoising and neural network is proposed in this paper. Full relative humidity experiment is carried to test LSM6DS3 MEMS gyros. Then the adaptive threshold denoising is used to separate the drift error and drift data modeled with RBF neural network. The experimental results show the effectiveness of the method, and it is of great significance in improving the performance of MEMS gyros. © 2018 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Random errors

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Load Feedback-Based Resource Scheduling and Dynamic Migration-Based Data Locality for Virtual Hadoop Clusters in OpenStack-Based Clouds

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Tsinghua science and technology 2017年第2期22卷 149-159页

作者： Dan Tao Zhaowen Lin Bingxu Wang School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003China Network and Information Center Institute of Network TechnologyScience and Technology on Information Transmission and Dissemination in Communication Networks LaboratoryNational Engineering Laboratory for Mobile Network SecurityBeijing University of Posts and TelecommunicationsBeijing 100876China

With cloud computing technology becoming more mature, it is essential to combine the big data processing tool Hadoop with the Infrastructure as a Service（Iaa S） cloud platform. In this study, we first propose a new Dynamic Hadoop Cluster on Iaa S（DHCI） architecture, which includes four key modules： monitoring,scheduling, Virtual Machine（VM） management, and VM migration modules. The load of both physical hosts and VMs is collected by the monitoring module and can be used to design resource scheduling and data locality solutions. Second, we present a simple load feedback-based resource scheduling scheme. The resource allocation can be avoided on overburdened physical hosts or the strong scalability of virtual cluster can be achieved by fluctuating the number of VMs. To improve the flexibility, we adopt the separated deployment of the computation and storage VMs in the DHCI architecture, which negatively impacts the data locality. Third, we reuse the method of VM migration and propose a dynamic migration-based data locality scheme using parallel computing entropy. We migrate the computation nodes to different host（s） or rack（s） where the corresponding storage nodes are deployed to satisfy the requirement of data locality. We evaluate our solutions in a realistic scenario based on Open *** experimental results demonstrate the effectiveness of our solutions that contribute to balance the workload and performance improvement, even under heavy-loaded cloud system conditions.

关键词： Hadoop resource scheduling data locality Infrastructure as a Service（Iaas） OpenStack

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Dense small cell networks: From noise-limited to dense interference-limited

Dense small cell networks: From noise-limited to dense inter...

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作者： Yang, Bin Mao, Guoqiang Ding, Ming Ge, Xiaohu Tao, Xiaofeng School of Electronic Information and Communications Huazhong University of Science and Technology Wuhan430074 China School of Computing and Communication University of Technology Sydney UltimoNSW2007 Australia Data61 CSIRO CanberraACT2601 Australia National Engineering Laboratory for Mobile Network Security Beijing University of Posts and Telecommunications Beijing100876 China

Considering both non-line-of-sight (NLoS) and line-of-sight (LoS) transmissions, the transitional behaviors from noise-limited regime to dense interference-limited regime have been investigated for the fifth generation (5G) small cell networks (SCNs). Besides, we identify four performance regimes based on base station (BS) density, i.e., 1) the noise-limited regime, 2) the signal-dominated regime, 3) the interference-dominated regime, and 4) the interference-limited regime. To characterize the performance regime, we propose a unified framework analyzing the future 5G wireless networks over generalized shadowing/fading channels, in which the user association schemes based on the strongest instantaneous received power and the strongest average received power can be studied, while NLoS/LoS transmissions and multislop path loss model are considered. Simulation results indicate that different factors, i.e., noise, desired signal, and interference, successively and separately dominate the network performance with the increase of BS density. Hence, our results shed new light on the design and management of SCNs in urban and rural areas with different BS deployment densities. © 1967-2012 IEEE.

关键词： Wireless networks

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An Adaptive Energy Saving Scheme of DTN based on Geographic Grid for Human Living Areas

An Adaptive Energy Saving Scheme of DTN based on Geographic ...

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IEEE information technology and Mechatronics Engineering Conference (ITOEC)

作者： Tingwei Fu Zhan Wen Jianwei Liu Zheng Zheng Wenzao Li School of Communication Engineering Chengdu University of Information Technology Chengdu Sichuan China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

ISBN: (纸本)9781538653746

Delay Tolerant Network (DTN) is playing a pivotal role in the future human living areas, especially in the future development of smart cities. In the future smart cities, the available energy resources are very limited. In this condition, the intelligent transmission is required as soon as possible, to achieve the goal of saving energy resources. At present, most of the researches focus on optimizing the transmission unit or routing algorithm for prolonging the network life time. There is no good adaptive energy saving scheme according to urban environmental rules. In this paper, an energy protection mechanism under human encounter characteristics is proposed in terms of AESS (Adaptive Energy Saving Scheme based on geographic grid) approach, which can be applied to various DTN routing protocols such as Epidemic, Prophet, ADAF etc. According to the rules in the urban scenarios, nodes can sleep dynamically to save energy. Simulation results verify the performance of proposed AESS which is used in Epidemic, Prophet and ADAF , under an urban scenario, are better than the corresponding original algorithm in delivery ratio, network overhead ratio and energy consumption status.

关键词： Urban areas Routing Heuristic algorithms Energy consumption Energy resources Wavelength division multiplexing Simulation

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Real-time network traffic classification based on CDH pattern matching 14

Real-time network traffic classification based on CDH patter...

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14th International Conference on Computational Intelligence and security, CIS 2018

作者： Li, Xunzhang Wang, Yong Ke, Wenlong Feng, Hao School of Computer Science and Information Security Guilin University of Electronic Technology Guilin Guangxi541004 China School of Information and Communication Guilin University of Electronic Technology Guilin Guangxi541004 China Guangxi Cooperative Innovation Center of Cloud Computing and Big Data Guilin University of Electronic Technology Guilin Guangxi541004 China Guangxi Colleges and Universities Key Laboratory of Cloud Computing and Complex Systems Guilin University of Electronic Technology Guilin Guangxi541004 China

ISBN: (纸本)9781728101699

In recent years, with the rapid development of the Internet, the data scale of application behavior and application traffic have exploded. How to classify the real-time traffic of network becomes a big challenge. How to balance the accuracy and real-time of traffic classification is a difficult problem in technology. Therefore, this paper proposes a pattern matching real-time traffic classification method named PM, which first uses jpcap to accept network traffic data in real time, and then uses pattern matching to perform real-time matching traffic characteristics to achieve traffic classification. Among them, the use of the distributed message system kafka and the parallel computing framework Spark significantly improve the execution efficiency of the program. The experimental results show that PM has good performance in terms of accuracy. © 2018 IEEE.

关键词： Pattern matching

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Optical Image Encryption Based on Mixed Chaotic Maps and Single-Shot Digital Holography

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Transactions of Tianjin University 2017年第2期23卷 184-191页

作者： Yonggang Su Chen Tang Xia Chen Biyuan Li Wenjun Xu Zhenkun Lei School of Electrical and Information Engineering Tianjin University Tianjin 300072 China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308 China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024China

Random phase masks play a key role in optical image encryption schemes based on double random phase technique. In this paper, a mixed chaotic method is proposed, which can efficiently solve some weaknesses that one-dimensional (1-D) single chaotic maps encounter to generate random phase masks. Based on the chaotic random phase masks, optical image encryption and decryption are realized with a single-shot digital holographic technique. In the proposed encryption scheme, the initial value and parameters of mixed chaotic maps serve as secret keys, which is convenient for the key management and transmission. Moreover, it also possesses high resistance against statistical attack, brute-force attack, noise attack and shear attack. Simulation results and security analysis verify the validity and security of the proposed encryption scheme. © 2017, Tianjin University and Springer-Verlag Berlin Heidelberg.

关键词： Chaotic systems Geometrical optics Holography Image processing Lyapunov methods Optical data processing

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Research on 4G And 5G Authentication Signaling

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Journal of Physics: Conference Series 2019年第4期1213卷

作者： Lei Song Zhan Xu Zhigang Tian Jinhui Chen Ruxin Zhi School of Information and Communication Engineering Beijing Information Science & Technology University Beijing China Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China Key Laboratory of Modern Measurement & Control Technology Ministry of Education

In recent years, the development and standardization of 5G networks have received extensive attention. 3GPP officially confirmed that Service-Based Architecture (SBA) is the unified infrastructure of the 5G core network (5GC). The Service-Based Interface (SBI) is an important part of the SBA for interaction between network function services within the 5GC. The fifth generation mobile network will support a range of use cases and requirements that are completely different from traditional 4G networks, such as providing a high level of authentication mechanisms. This paper is organized as follows: First, we compare the difference between 4G authentication and 5G authentication in three aspects including the 4G architecture, authentication process, and communication protocol stack, then implement the simulation environment, and finally evaluate the performance by comparing the delay.

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