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Cloud Platform Based Automated Security Testing System for Mobile Internet

Tsinghua Science and technology 2015年第6期20卷 537-544页

作者： Dan Tao Zhaowen Lin Cheng Lu the School of Electronic and Information Engineering Beijing Jiaotong University Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks 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 Telecommunications

With respect to security, the use of various terminals in the mobile Internet environment is *** terminal testing methods cannot simulate actual testing environments; thus, the test results do not accurately reflect the security of terminals. To address this problem, we designed and developed a cloud platform based automated testing system for the mobile Internet. In this system, virtualization and automation technology are utilized to integrate mobile terminals into the cloud platform as a resource, to achieve a novel cloud service called Testing as a Service(Taa S). The system consists of three functional modules: web front-end module, testing environment module, and automated testing module. We adopted the permeable automated testing tool Metasploit to perform security testing. In our test experiments, we selected 100 apps with diverse vulnerability levels, ranging from secure to vulnerable, to perform a series of functional tests. The experimental results show that this system can correctly test both the number of vulnerable apps and their corresponding vulnerability levels. As such, the designed system can flexibly configure various testing environments for different testing cases or projects, and thereby perform security testing automatically.

关键词： automated security testing cloud platform virtuali

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A hybrid opportunistic Routing Scheme based on nodes grouping strategy for VANETs in Urban Scenarios

A hybrid opportunistic Routing Scheme based on nodes groupin...

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International Conference on wireless and Optical Communications ( WOCC)

作者： Yuanfa Xie Jianmin Bao Zhihua Song Ya Zhou Bell Honors School Nanjing University of Posts and Telecommunications Nanjing China Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Jiangsu Provincial Engineering Research Center of Telecommunications and Network Technology Nanjing China

The increasing mobile devices with better wireless communication facilities trends to be a good opportunity for the development of vehicular ad-hoc networks (VANETs). The opportunistic routing protocols are generally developed from the Delay Tolerant network (DTN). In this paper, we propose an opportunistic routing algorithm called RSUS (Routing Scheme for Urban Scenarios) based on a grouping strategy which considers both internal property and external contacts of nodes. The nodes of network are divided into super nodes, backbone nodes and ordinary nodes. Each type of nodes uses different routing strategy respectively. Then simulations were carried out by the ONE simulator and evaluations compared with the traditional single opportunistic algorithms. Furthermore RSUS was simulated in three different cities. Results show that RSUS algorithm can obtain the optimal performance with a low network overhead ratio and a high delivery rate, it is also suitable for different urban scenarios.

关键词： Routing Urban areas Algorithm design and analysis wireless communication Ad hoc networks Delays Optical fiber communication

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A Novel Two-Stage PCA Algorithm for Object Tracking

A Novel Two-Stage PCA Algorithm for Object Tracking

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2016 International Conference on Communications, Information Management and network Security (CIMNS2016)

作者： Yuanyuan Yang Dong Hu Education Ministry's Key Lab of Broadband Wireless Communication and Sensor Network Technology Education Ministry's Engineering Research Center of Ubiquitous Network and Heath Service Jiangsu Province's Key Lab of Image Procession and Image Communications Nanjing University of Posts and Telecommunications

ISBN: (纸本)9781510830981

In this paper, we propose a two-stage PCA algorithm to deal with the problem of target appearance changes in object tracking. Our method is based on particle filter framework and aims at building up a robust appearance model for the target. In the first-stage, PCA is applied on several templates collected before tracking to construct a low dimensional subspace for the targets. Correspondingly, in the later tracking, all particles will be projected into this subspace to calculate the weight of particles, as well as the location of the target by weighted sum of particles. In the second-stage, PCA is adopted to decompose the reconstruction error into orthogonal basis to find the basis with biggest variance which can best present the appearance changes. Correspondingly, we uses this basis to update the old subspace. Besides, a threshold is set to decide when to update which greatly reduce the numbers of update. The two stages work together to establish a robust appearance model making our tracking algorithm more robust. Experimental results on public video sequence demonstrate the effectiveness of our proposed algorithm.

关键词： particle filter two-stage PCA eigenspace reconstruction error

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Effective Scheme for Global Abnormal Event Detection for Surveillance Video

Effective Scheme for Global Abnormal Event Detection for Sur...

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2016 International Conference on Communications, Information Management and network Security (CIMNS2016)

作者： Fangxu Dong Dong Hu Education Ministry's Key Lab of Broadband Wireless Communication and Sensor Network Technology Education Ministry's Engineering Research Center of Ubiquitous Network and Heath Service Jiangsu Province's Key Lab of Image Processing and Image Communications Nanjing University of Posts and Telecommunications

ISBN: (纸本)9781510830981

An effective algorithm for global abnormal detection from surveillance video is proposed in this paper. The algorithm is based on sparse representation. To deal with the illumination change in video scenes, specific feature extract methods are designed for corresponding illumination conditions. In the case of non-uniform illumination, features are extracted directly on the original image;in the case of uniform illumination, features are extracted on the binary image obtained by threshold segmentation on the difference image, where the thresholds are computed by the Otsu's method. The features extracted on normal video are used to learn an over-complete dictionary. Then, the sparse reconstruction cost over the dictionary is used to detect abnormal events. Experiments on the open global abnormal dataset and the comparison to the state-of-the-art methods validate effectiveness and quickness of our algorithm.

关键词： abnormal detection illumination change binary images sparse reconstruction cost

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Semantic QoS Ontology and Semantic Service Ranking Approach for IoT services

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Journal of Harbin Institute of technology(New Series) 2014年第6期21卷 102-112页

作者： Nwe Nwe Htay Win Jian-Min Bao Gang Cui Purevsuren Dalaijargal School of Computer Science and Technology Harbin Institute of Technology Key Lab of Broadband Wireless Communication and Sensor Network Technolog Jiangsu Provincial Engineering Research Center of Telecommunications and Network TechnologyMinistry of Education

Due to a rapid increase in the number of functionally equivalent web services at open and dynamic Io T service environment,Qo S has become a major discrimination factor to reflect the user's expectation and experience of using a *** are different languages and models for expressing Qo S advertisements and requirements among service providers and ***,it leads to the issues of semantic interoperability of Qo S information and semantic similarity match between a semantic description of the service being requested by the service consumer,and a formal description of the service being offered by the service *** this paper,we propose a hierarchical two-layer semantic Qo S ontology to promote the description and declaration of Qo S-based service information in detail for any domain and ***,we develop a semantic matchmaking algorithm to compare the web services according to their Qo S information and adopt analytical hierarchy process( AHP) to make decision for the ranked services depending on the Qo S *** comparison study and experimental result show that our proposed system is superior to other service ranking approaches.

关键词： IoT service environment semantic QoS ontology semantic matchmaking algorithm QoS-based service information analytical hierarchy process

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A parallel HEVC encoder scheme based on Multi-core platform

A parallel HEVC encoder scheme based on Multi-core platform

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2015 4th National Conference on Electrical,Electronics and Computer engineering(NCEECE 2015)

作者： Shu Jun Hu Dong Education Ministry’s Key Lab of Broadband Wireless Communication and Sensor Network Technology Education Ministry’s Engineering Research Center of Ubiquitous Network and Health Service System Jiangsu Province’s Key Lab of Image Procession and Image Communications Nanjing University of Post and Telecommunications

ISBN: (纸本)9781510819085

In this paper, we propose a parallel HEVC encoder scheme based on multi-core platform, which provides maximized parallel scalability by exploiting two-level parallelism, namely, the frame level parallelism and the CTB level parallelism. Inspired by the intra-CTB row level parallelism of WPP in HEVC, we investigate the inter-frame CTB prediction dependency to its reference CTBs, and find the inter-CTB correlation. Using this inter-correlation, we divide a frame into CTB units and create CTB-row level coding threads when their corresponding reference CTBs are available. Each thread is bonded to a processing core, therefore, both intra- and inter-CTB rows can be encoded in parallel. Moreover, we introduce a priority scheduling mechanism to control the coding threads. Experiments on Tilera-Gx36 multi-core platform show that, compared with serial execution, the proposed method achieves 3.6 and 4.3 times speedup for 1080 P and 720 P video sequences, respectively.

关键词： HEVC multi-core platform parallel processing frame-level CTB-level

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Adaptive space-time diversity slotted ALOHA over 2 × m MIMO multiaccess channels

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IEEE Transactions on Vehicular technology 2009年第7期58卷 3271-3282页

作者： Guo, Haiyou Hu, Honglin Zhang, Yan Chen, Hsiao-Hwa Key Laboratory of Wireless Sensor Network and Communications Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Shanghai Research Center for Wireless Communications Shanghai 200335 China Simula Research Laboratory 1325 Lysaker Norway Department of Engineering Science National Cheng Kung University Tainan 70101 Taiwan

This paper proposes a new random-access protocol over 2 × M multiple-input-multiple-output (MIMO) multiaccess channels, namely, adaptive space-time diversity slotted ALOHA (ASTDSA), to address the issues on collision diversity while maintaining implementation simplicity. The proposed scheme exploits the advantages of both V-BLAST and Alamouti space-time block coding (STBC). In particular, it adaptively only transmits space-time-coded copies to remediable collisions. The coded replicas contain the same information as the packets involved in collisions and are immediately sent after a colliding slot. Combining the packets received in two consecutive slots, the Alamouti STBC scheme can be reconstructed to linearly resolve the collision without sacrificing the space-time diversity gain. An embedded Markov chain is developed to derive performance metrics with respect to throughput, diversity gain, delay, and stability. The tradeoff among those metrics is investigated. The results demonstrate that ASTDSA significantly outperforms the existing schemes, and simulations are used to validate the analytical model. © 2009 IEEE.

关键词： MIMO systems

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Mechanism for maximizing area-centric coding gains in wireless multihop networks

Mechanism for maximizing area-centric coding gains in wirele...

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2009 IEEE International Conference on Communications, ICC 2009

作者： Yan, Yan Baoxian, Zhang Zhuang, Zhao Xiaojun, Shen Jian, Ma Institution of Computing Technology Chinese Academy of Sciences Beijing 100080 China CCCE Graduate University Chinese Academy of Sciences Beijing 100049 China Key Lab. of Wireless Sensor Network and Communications Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China School of Computing and Engineering University of Missouri Kansas City MO 64110 United States Nokia Research Center Beijing 100176 China

ISBN: (纸本)9781424434350

Localized network coding is a promising technique to improve the throughput of wireless multihop networks with multiple concurrent unicast sessions. However, most existing mechanisms in this field perform network coding without considering the maximization of joint coding gain among neighboring nodes. In this paper, we study how to improve network performance by maximizing the area-centric coding gains in wireless networks. To achieve this goal, we design an efficient coding-aware transmission scheduling mechanism. Simulation results show that our mechanism can remarkably improve the network throughput as compared with existing mechanisms. ©2009 IEEE.

关键词： network coding

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5G wireless Systems 1

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丛书名： wireless networks

1000年

作者： Yang Yang Jing Xu Guang Shi Cheng-Xiang Wang

ISBN: (数字)9783319618692

ISBN: (纸本)9783319618685;9783319871813

Testing and evaluation technologies is widely recognized and plays important roles in the wireless technology developments, along with the research on basic theory and key technologies. The investigation and developments on the multi-level and comprehensive evaluations for 5G new technologies, provides important performance references for the 5G technology filtering and future standardizations.

关键词： Communications engineering, networks Computer Communication networks Operating Systems

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