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Research on vertical handoff decision based on PROMETHEE algorithm for heterogeneous wireless networks

International Journal of Advancements in Computing technology 2012年第17期4卷 334-342页

作者： Shengmei, Liu su, Pan Zhengkun, Mi Broadband wireless communication and sensor network technology key lab. of ministry of education Nanjing University of Posts and Telecommunications Nanjing 210003 China

The PROMETHEE (Preference Ranking Organization METHod for Enrichment Evaluation) algorithm is applied in the vertical handoff decision technology for heterogeneous wireless networks and researched on its performance. Four 3GPP defined traffic classes are considered in performance evaluation. An attribute matrix is constructed by considering the SINR in the source network and the equivalent SINR in the target network, the required bandwidth, the traffic cost and the available bandwidth of participating access networks. Handoff decision meeting multi-attribute QoS requirement is made according to the traffic features. The weight relation of decision elements is determined with Least Square (LS) method. Finally decision is made by using PROMETHEE algorithm based on the attribute matrix and weight vector. The simulation results show that the PROMETHEE algorithm can provide satisfactory vertical handoff performance and the proposed LS-PROMETHEE algorithm can be fit for the characteristics of the traffic.

关键词： Heterogeneous networks

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Interference management based on spectrum allocation and power control in femtocell networks

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Journal of Computational Information Systems 2012年第19期8卷 8095-8102页

作者： Ji, Xiangfen Qi, Zhu Key Lab on Wideband Wireless Communications and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications Nanjing China

In recent years, with the proposition of the concept of femtocell how to make optimal allocation of limited resources has become the main problem in femtocell networks. In this paper, a new dynamic distributed interference management scheme QL & game which is based on spectrum allocation and power control is presented. QL & game aims at improving the performance of the femtocell system under the premise hat the SINR of the macro user is higher than the threshold. The simulation results show that the QL & game algorithm proposed in this paper have increased femtocells and system capacity with macro capacity guaranteed in comparison with other algorithms. © 2012 Binary Information Press.

关键词： Game theory

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Optimal power allocation and relay selection for cognitive two-way AF relaying network

Optimal power allocation and relay selection for cognitive t...

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IET International Conference on Information Science and Control Engineering 2012 (ICISCE 2012)

作者： Ronghua Luo Zhen Yang Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications China

ISBN: (纸本)9781629939254

In an underlay cognitive two-way Amplify-and-Forward (AF) relaying network, secondary users (SUS) and primary user (PU) can share the licensed spectrum simultaneously under the interference threshold constraint. In this paper, the joint power allocation and optimal relay selection scheme is proposed for allocating radio resource on cognitive nodes effectively. For power allocation problem, the objective function is to maximize the achieved minimum Signal to Interference plus Noise Ratio (SINR) at SUS, and the constraints include the total transmit power of cognitive nodes and PU interference threshold, the optimal power allocation algorithm and a simple distributed power allocation algorithm are proposed. Furthermore, based on these results, an optimal two-way relay selection scheme is proposed. Simulation results show that the proposed joint power allocation algorithms and relay selection scheme can achieve excellent system performance.

关键词： Cognitive two-way AF relaying Interference threshold Power allocation Relay selection power splitting interference threshold Allocation Algorithm Transmitter power relay Bidirectional

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Spectrum allocation based on interference management in femtocell networks

Spectrum allocation based on interference management in femt...

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International Conference on Automatic Control and Artificial Intelligence (ACAI 2012)

作者： Ju-rong Shi Qi Zhu Jiangsu Key Lab of Wireless Communications Key Lab on Wideband Wireless Communications and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications 210003 China

In order to mitigate the interference between macrocell mobile stations (mMSs) and femtocells and allocate the spectrum efficiently, a graph coloring based clustering algorithm for channel allocation is proposed in this paper. Under the premise of guaranteeing the SINR requirements of mMSs, the algorithm determines the initial set of subchannels which can be used for each femtocell. Then according to the constructed interference graph of the femtocell networks, each femtocell mobile station(fMS) is allocated all the available spectrum resources dynamically. In this paper, we use an improved cluster algorithm to ensure the SINR of mMSs and maximize the femtocell throughput. Simulation results show that the proposed algorithm can reduce the outage probability of mMSs as well as improve the total throughput.

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A load-balanced data aggregation scheduling for duty-cycled wireless sensor networks

A load-balanced data aggregation scheduling for duty-cycled ...

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2012 4th IEEE International Conference on Cloud Computing technology and Science, CloudCom 2012

作者： Chen, Zhengyu Yang, Geng Chen, Lei Xu, Jian Wang, Haiyong Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts AndTelecommunications Nanjing 210046 China College of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210046 China School of Information Technology Jinling Institute of Technology Nanjing 211169 China

ISBN: (纸本)9781467345095

To bridge the gap between limited energy supplies of the sensor nodes and the system lifetime, duty-cycle wireless sensor networks (WSNs) with data aggregation are studied in this paper. We proposed a load-balanced and latency-efficient data aggregation scheduling for duty-cycled WSNs. A shortest path tree (SPT) is used as the routing structure for data aggregation scheduling. In SPT, parent-children assignments are well-designed to assign nodes from level h+1 to the parents at level h such that every parent has a balanced load, while reducing the sleep latency which is a period of time for a sender to wait for its parent to be active. Finally, through the simulation and comparisons, we prove the effectiveness of our approach. © 2012 IEEE.

关键词： Scheduling

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Wavelet Transform-Based Distributed Compressed Sensing in wireless sensor networks

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China communications 2012年第2期9卷 1-12页

作者： Hu Haifeng Yang Zhen Bao Jianmin Key Lab of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and Telecommunications Nanjing 210003 P. R. China National Mobile Communications Research Laboratory Southeast University Nanjing 210096 P. R. China

wireless sensor networks(WSN) are mainly characterized by a potentially large number of distributed sensor nodes which collectively transmit information about sensed events to the *** this paper,we present a Distributed Wavelet Basis Generation(DWBG) algorithm performing at the sink to obtain the distributed wavelet basis in *** on this basis,a Wavelet Transform-based Distributed Compressed Sensing(WTDCS) algorithm is proposed to compress and reconstruct the sensed data with spatial ***,we make a detailed analysis of relationship between reconstruction performance and WTDCS algorithm parameters such as the compression ratio,the channel Signal-to-Noise Ratio(SNR),the observation noise power and the correlation decay parameter by *** simulation results show that WTDCS can achieve high performance in terms of energy and reconstruction accuracy,as compared to the conventional distributed wavelet transform algorithm.

关键词： WSN distributed compressed sensing distributed wavelet transform

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WSSecTool: A web service security analysis tool based on program slicing

WSSecTool: A web service security analysis tool based on pro...

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2012 IEEE 8th World Congress on Services, SERVICES 2012

作者： Fu, Wei Zhang, Yingzhou Zhu, Xianting Qian, Junyan College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing Jiangsu 210003 China Dept. of Computer Science and Technology Guilin Univ. of Electronic Technology Guilin 541004 China

ISBN: (纸本)9780769547565

With the development of web service, more and more attention has been drawn to web service in recent years. However, the damage caused by service security problems is becoming more and more serious nowadays. This paper develops a web service security analysis tool, WSSecTool, which is based on program slicing. This tool includes three modules namely slicing module, safety publishing module and testing module. Slicing module analyzes source codes of web service to generate method dependence graph (MDG). After MDG is generated, the tool slices MDG to detect the unsafe methods and the spread of them. Safety publishing module helps to hide unsafe methods to make them invisible to outer users after publishing. Testing module can test the services published by this tool to validate the correctness and feasibility of our analysis method. The experiments show that our tool is effective and practical. © 2012 IEEE.

关键词： Web services

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Research of classification methods of EEG signal based on wavelet packet transform and CSP

Research of classification methods of EEG signal based on wa...

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International Conference on Automatic Control and Artificial Intelligence, ACAI 2012

作者： Chen, K. Liu, Q. Ai, Q.S. School of Information Engineering Wuhan University of Technology 122 Luoshi Road Hongshan District Wuhan Hubei 430070 China Key Lab. of Broadband Wireless Communications and Sensor Networks Wuhan University of Technology 122 Luoshi Road Hongshan District Wuhan Hubei 430070 China

ISBN: (纸本)9781849195379

These years have been witnessing an increasing emphasis on researches of brain computer interface (BCI) which becomes a novel communication method from the brain to the output device, independent on normal peripheral nerve and muscle. And electroencephalogram (EEG) signal processing is one of the key research topics. In this paper, wavelet packet transform and common spatial patterns (CSP) are utilized for feature extraction. Finally, support vector machine (SVM) and Mahalanobis-distance are chosen to classify two kinds of motor imagery signal of left and right hands. Through experiments, we can recognize various factors affecting classification accuracy and the maximum accuracy rate could be up to 90.00%.

关键词： Brain computer interface

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Research of Product Information Sharing System Based on Cloud Manufacturing

Research of Product Information Sharing System Based on Clou...

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2012 International Conference on Mechanical Materials and Manufacturing Engineering(ICMMME 2012)

作者： Qingsong Ai Kui Mo Yan Wang Lei Zhao School of Information Engineering Wuhan University of Technology Key Lab. of Broadband wireless communications and Sensor networks Wuhan University of Technology

Nowadays, most manufacturing enterprises have realized that the ability to share product information in a quick, real-time, and effective manner between geographically located team members is very crucial for them to survive in the keen competitive global market. However, the existing product information sharing systems have many problems in universality, dynamic, and portability. This paper presented a product information sharing system based on the research of the fundamental theory and key technologies of cloud manufacturing. Our work focuses on proposing a six-layer architecture of the system. For comparison, we discussed the advantages of it. Finally, to validate the architecture, we developed a prototype system. The test results show that the proposed architecture provides a commendable mechanism to better share product information.

关键词： Cloud manufacturing Product information sharing Manufacturing cloud Advanced manufacturing technology

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A trustworthy network architecture based on strengthen TNC

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content technology and its Applications 2012年第17期6卷 343-349页

作者： Yin, Ansheng Zhang, Shunyi Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education China Institute of Information and Network Technology Nanjing University of Posts and Telecommunication China

As networks have grown in size and complexity, the existing isolated add-on security systems of internet are confronting some serious challenges. This paper outlines the background, concept, evolution and basic properties of the trustworthy network, and projects the future development of the network in terms of its access control, modeling of trust relationship, quantification and decisionmaking. Then put forward a strengthen TNC to fix the deficiencies.

关键词： network architecture

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