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IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Yuan-xi Jiang Bao-hua Zhao Department of Computer Science Anhui Province Key Laboratory of software in Computing and Communication University of Science and Technology Hefei Anhui China

Routing protocol security is the key element in the research of secure wireless sensor networks. Due to its special characteristic, designing security routing protocol is a challenge in these networks. A secure routing protocol with malicious nodes detecting and diagnosing mechanism is used to reduce the malicious nodes' threat to the WSNs.

关键词： Routing protocols Wireless sensor networks Data security Monitoring communication system security computer networks Sensor phenomena and characterization Cryptography Relays Resumes

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Scalable video multicast with joint layer resource allocation in broadband wireless networks

Scalable video multicast with joint layer resource allocatio...

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International Conference on Network Protocols

作者： Li, Peilong Zhang, Honghai Zhao, Baohua Rangarajan, Sampath Dept. of Computer Science and Technology University of Science and Technology of China China NEC Laboratories America United States State Key Laboratory of Networking and Switching Technology Beijing China Province Key Laboratory of Software in Computing and Communication Hefei Anhui 230027 China

ISBN: (纸本)9781424486458

Scalable video coding (SVC), together with adaptive modulation and coding (AMC), can improve wireless multicast streaming video by jointly performing radio resource allocation and modulation and coding scheme (MCS) selection. However, the existing schemes in the literature allocate radio resources for different video layers separately, which leads to a waste of radio resources. In this work, we introduce the notion of joint layer resource allocation which allows to jointly allocate resources to multiple video layers that are assigned the same MCS. We formulate this problem and prove it to be NP-hard. Then we develop a pseudo-polynomial algorithm that finds the optimal total system utility. Our algorithm assumes a very generic utility function and flexible video layer rates. To reduce the complexity of the algorithm, we also propose Fully Polynomial Time Approximation Schemes (FPTAS) for the same problem. Simulation results show that our optimal algorithm offers significant improvement on system utility over a previous optimal algorithm and a greedy algorithm both of which do not support joint layer resource allocation. The proposed approximation algorithm provides controllable tradeoff between performance and computational complexity and, with appropriately chosen parameters, it outperforms the greedy algorithm with 40% less running time. © 2010 IEEE.

关键词： Resource allocation

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Secure Location Verification Using Hop-Distance Relationship in Wireless Sensor Networks

Secure Location Verification Using Hop-Distance Relationship...

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IEEE Asia-Pacific Conference on Services Computing (APSCC)

作者： Yongsheng Liu Hao Zhou Baohua Zhao Department of Computer Science Anhui Province Key Laboratory of Software in Computing and Communication University of Science and Technology Hefei Anhui China

With the growing prevalence of wireless sensor networks comes a new need for location-based access control mechanisms. Thus we need a method to perform location verification to enforce location-based access to information resources. In this work, a statistic location verification algorithm in randomly deployed sensor networks is proposed. The nodes in the networks are classified to three roles. The claimer broadcasts the position message. The witnesses rebroadcast it and report the distance and lowest hop information to the verifier. The verifier makes use of hypothesis tests to make a decision. At last the simulation results confirm the validation of the algorithm.

关键词： Wireless sensor networks computer networks Access control Information resources Statistics Broadcasting computer science laboratories Testing computer worms

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Personalized video emotion tagging through a topic model

Personalized video emotion tagging through a topic model

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IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Shan Wu Shangfei Wang Zhen Gao Key Lab of Computing and Communication Software of Anhui Province School of Computer Science and Technology University of Science and Technology of China Hefei China

ISBN: (纸本)9781509041183

The inherent dependencies among video content, personal characteristics, and perceptual emotion are crucial for personalized video emotion tagging, but have not been thoroughly exploited. To address this, we propose a novel topic model to capture such inherent dependencies. We assume that there are several potential human factors, or "topics," that affect the personal characteristics and the personalized emotion responses to videos. During training, the proposed topic model exploits the latent space to model the relationships among personal characteristics, video content and video tagging behaviors. After learning, the proposed model can generate meaningful latent topics, which help personalized video emotion tagging. Efficient learning and inference algorithms of the model are proposed. Experimental results on the CP-QAE-I database demonstrate the effectiveness of the proposed approach in modeling complex relationships among video content, personal characteristics, and perceptual emotion, as well as its good performance in personalized video emotion.

关键词： Video emotion tagging personal characteristics topic model

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Zone routing protocol based on energy consumption

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Jisuanji Gongcheng/computer Engineering 2006年第12期32卷 117-118+135页

作者： Zhai, Weifeng Gu, Naijie Zhang, Jianming Department of Computer Science and Technology University of Science and Technology of China Hefei 230027 China Anhui Province Key Laboratory of Computing and Communication Software Hefei 230027 China

A zone routing protocol based on the energy consumption speed of nodes in mobile Adhoc networks is presented. A route select parameter computed by residual lifetime of nodes and hop count of route is used to be selected the best route, the nodes that have more energy have more probability of chosen. The mechanism can balance the energy consumption of node and prolong network's life. Simulation result comparing with zone routing protocol in NS-2 shows EZRP has less number of death nodes, lower routing overhead, and longer lifetime of network.

关键词： Energy consumption EZRP Hybrid routing protocol MANET

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Opportunistic Dynamic Channel Allocation Based on Chain Store Game

Opportunistic Dynamic Channel Allocation Based on Chain Stor...

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International Conference on Wireless communications, Networking and Mobile Computing (WiCom)

作者： Jinglong Li Ping Zhu Xufa Wang Anhui Province Key Laboratory of Software in Computing and Communication School of Computer Science and Technology University of Science and Technology Hefei Anhui China

In adaptive secondary user channel allocation of cognitive radio, some users finish communication and release their channel as the time goes by, while some newcomers request channel resources to communicate. Thus, it is necessary to consider spectrum allocation process from the temporal perspective. In this paper, secondary users are modeled to a dynamic game similar to the chain store game, by which each user is able to achieve the equilibrium state adaptively without a central coordinator. We investigate the game through analyzing of correlated equilibria, which is computed easily and exhibits better results than Nash equilibria. We import some signal mechanisms based on time and sequence number that help users to achieve the correlated equilibria. The game algorithms based on correlated equilibrium are presented. The experimental results shows that our method have obvious superiorities to other allocation algorithms.

关键词： Channel allocation Cognitive radio Wireless sensor networks laboratories computer science Nash equilibrium Databases Base stations Resource management Game theory

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A New Channel Parameter For Cognitive Radio

A New Channel Parameter For Cognitive Radio

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International Conference on Cognitive Radio Oriented Wireless Networks and communications

作者： Ping Zhu Jinglong Li Kun Han Xufa Wang Anhui Province Key Laboratory of Software in Computing and Communication Department of Computer Science and Technology University of Science and Technology Hefei Anhui China

ISBN: (纸本)9781424408146;1424408156

Spectrum leasing has made more efficient utilization for the limited spectrum resource. While increasing the spectrum utilization, spectrum leasing also brings in some problem. Spectrum switch in the leasing process not only introduces in additional system overhead, but also decreases the secondary user's Qos. In this paper, we model the wireless system as a M/G/1 queue with preemptive priority, propose a new channel parameter to analyze the switch performance. Algorithms are suggested to reduce system overhead and to improve secondary user's Qos based on the new parameter.

关键词： Cognitive radio Switches Performance analysis laboratories computer science communication switching Queueing analysis Physics Game theory Wideband

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PASS: An adaptive multi-copy routing scheme for intermittently connected mobile Ad Hoc networks

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Journal of Convergence Information Technology 2012年第14期7卷 315-323页

作者： Xu, Jia Wang, Ru Chuan Sun, Li Juan College of Computer Nanjing University of Posts and Telecommunications Nanjing China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing China Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing China Key Laboratory for Computer Network and Information Integration Southeast University Ministry of Education Nanjing China State Key Lab. for Novel Software Technology Nanjing University Nanjing China

Intermittently Connected Mobile Ad Hoc Networks (ICMANs) are mobile networks in which complete source-to-destination paths do not exist most of the time. This paper proposed a Predictable Adaptive Seed Spray routing (PASS) for intermittently connected mobile Ad Hoc networks. PASS is a cost-efficient delay-bounded routing protocol without network parameters and provides acceptable and resilient service in the face of challenged environments. Simulations have shown that PASS outperforms existing schemes such as Epidemic, binary spray & wait and AMR with respect to routing cost and adaptability.

关键词： Routing protocols

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A qualitative modeling and simulation method based on cloud model

A qualitative modeling and simulation method based on cloud ...

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2013 5th International Conference on Modeling, Simulation and Applied Optimization, ICMSAO 2013

作者： Shao, Chenxi Sun, Kelu Zhenzhong, Shao Computer Science and Technology Dept. University of Science and Technology of China Hefei 230027 China Anhui Province Key Laboratory of Software in Computing and Communication Hefei 230027 China Jianghuai Automobile Co. Ltd. Hefei 230022 China

ISBN: (纸本)9781467358149

Qualitative simulation is effective methods processing incomplete knowledge, how to represent qualitative knowledge and reduce spurious behaviors is its research emphasis. Contraposing the limitations of existing methods representing qualitative knowledge and filtering spurious behaviors, an approach is proposed to qualitatively model and simulate on the basis of normal cloud model. In this research, the cloud numeric characteristics and cloud measurement are introduced into this approach;consequently, it can more accurately assess the qualitative knowledge, and expand the variables expression and quantity space;meanwhile, it is constructed the means of modeling and simulation by adopting more amply portraying the system status, more intuitively transforming status and more accurately filtering spurious behaviors. Furthermore, in simulation algorithm, cloud measurement indices are employed to significantly select the successor status which can not be determined by existing constraint means. The results of simulation example demonstrate that our approach effectively improves the ability to filter spurious behaviors, and it is a feasible method. © 2013 IEEE.

关键词： Cloud computing

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NURBS model for chaotic time series

NURBS model for chaotic time series

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2011 3rd International Conference on computer Research and Development, ICCRD 2011

作者： Shao, Chenxi Xiao, Lipeng Department of Computer Science and Technology University of Science and Technology of China Hefei China Department of Modern Physics Nonlinear Science Center University of Science and Technology of China Hefei China Anhui Province Key Laboratory of Software in Computing and Communication Hefei China

ISBN: (纸本)9781612848372

NURBS method is extensively used in the field of Geometric Modeling. Since the original NURBS method does not have time factor, it can not display the huge advantage in the dynamics field. In this article, inspired by the segmented nature of basis functions, we propose a time factor method which can be directly applied in reconstruction of missing data, with remarkable performance in matching the original data. This work does not only give an expression of chaotic time series, but also highlights a possible way for the challenge in reconstruction of missing data. © 2011 IEEE.

关键词： Time series

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