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检索条件"机构=Beijing Laboratory of Network System Architecture and Convergence"

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IDP-VRMA: an Intelligent and Distributed Virtual Resource Management architecture Based on Prediction for Future networks

IDP-VRMA: an Intelligent and Distributed Virtual Resource Ma...

引用

2011 International Conference on Advanced Intelligence and Awareness Internet(第二届高等智能和感知网络国际会议 AIAI 2011)

作者： Xiaochuan Sun Hongyan Cui Jianya Chen Yunjie Liu Laboratory of Network System Architecture and Convergence Beijing Key Laboratory Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781622761234

For the dynamic virtual environment in future network, varying and abundant service demands on future network requires intelligent resource management capabilities to ensure service delivery to customers, motivating the need to develop a novel virtual resource management architecture for this purpose. In the paper, we propose an intelligent and distributed virtual resource management architecture based on prediction for future network (IDP-VRMA), consist of a Control system, a Knowledge Processing Element and Intelligent Substrate Nodes. Combined with monitoring and prediction capabilities, the IDP-VRMA can perform intelligent virtual resource management in the dynamic virtual environment. Furthermore, we demonstrate the advantages of the proposed architecture by means of functional descriptions.

关键词： future networks virtual resource management intelligent distributed prediction

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Polarization Information Based Spectrum Detection Algorithm for Cognitive Radio

Polarization Information Based Spectrum Detection Algorithm ...

引用

2011 the Iet 4th International Conference on Wireless,Mobile & Multimedia networks(第四届无线、移动及多媒体网络国际会议 ICWMMN2011)

作者： Yu Deng Xuekang Sun Caili Guo School of Network Education Beijing University of Posts and Telecommunications Beijing China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts an

In this paper, we propose a spectrum detection algorithm based on an orthogonal dual-polarized antenna for cognitive radio, called polarization spectrum detection. In the proposed algorithm，using polarization information from dual-polarization received antenna，the test statistic is derived according to likelihood ratio test criteria, and is compared with threshold to detect whether the primary user is present or not. The main new attractive feature of the proposed algorithm is that to work in the presence of unknown priori knowledge. The simulation results show that the proposed algorithm performance with priori knowledge is much better than energy detection，and is affected little by noise uncertainty with unknown priori knowledge.

关键词： dual-polarization antenna cognitive radio spectrum detection likelihood ratio test

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The Design and Implementation of VoIP Flow Monitoring system

The Design and Implementation of VoIP Flow Monitoring System

引用

2011 International Conference on Advanced Intelligence and Awareness Internet(第二届高等智能和感知网络国际会议 AIAI 2011)

作者： Xiaoqin Liu Feng Liu Wenli Zhou Yun Xie Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781622761234

This paper mainly introduces the design and the function structure of VoIP Flow Monitoring system, providing a complete set of monitoring solution. Different with other system, in the process of design, the system focuses on the web based flow analysis module, and illustrates the solution aiming at monitoring and controlling flow. With plenty of search conditions, the web module is flex and users can find out their interested information easily. Finally, with the data in the present network, the system will display how it works on providing information and controlling VoIP flow.

关键词： VoIP flow monitoring and controlling system design

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Obtain IP Database Based on BGP

Obtain IP Database Based on BGP

引用

2011 International Conference on Advanced Intelligence and Awareness Internet(第二届高等智能和感知网络国际会议 AIAI 2011)

作者： Wenjun Jie Yanyan Hao Wenli Zhou Qing Yan Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781622761234

For the demand of analyzing network traffic flows from operators at present, this paper introduces a method of obtaining IP database based on BGP protocol and describes the details of the system deployment. Through analyzing the obtained data, it was found that the IP database obtained this way has a high accuracy. And furthermore it has an advantage that is not available in the traditional way based on APNIC + WHOIS--to analyze the transit traffic.

关键词： network traffic flow IP database BGP APNIC transit traffic

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The Application of an Improved Discrete-Mapping Chaotic Ant Swarm Optimization for Multi-constrained QoS Routing

The Application of an Improved Discrete-Mapping Chaotic Ant ...

引用

2011 International Conference on Future Wireless networks and Information systems (ICFWI 2011)

作者： Jia Du Hongyan Cui Chen Feng Jianya Chen School of Telecommunication Engineering Beijing University of Posts and Telecommunications Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

Real-time applications such as video and audio streaming popularly in the public network require the guarantee of Quality of Services(Qo S). But most of the current Qo S routing optimization algorithm such as Ant Colony Optimization suffered from scalability problem and local optimum problem and was used in the continuous space. So in this paper, Discrete-Mapping Chaotic Ant Swarm Optimization(DM-CASO) is introduced into the Qo S discrete routing area so as to improving Qo S routing performance in the network. This paper firstly establish the multi-constrained QoS routing model, then propose a new path update method in the discrete space through the introduction of discrete mapping, finally introduce the natural selection and mutation ideas to effectively jump out of the local optimum. The simulation results show that the proposed algorithm can solve the problem of finding the optimal path and achieve a better effect in the success rate of finding optimal path.

关键词： chaotic ant swarm,quality of service,routing optimization

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Traffic Classification Using Cost Based Decision Tree

Traffic Classification Using Cost Based Decision Tree

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2011 International Conference on Computer Science and network Technology(2011计算机科学与网络技术国际会议 ICCSNT 2011)

作者： Xuan Zhou Lin Wang Rentao Gu School of Information and Communications Beijing University of Posts and Telecommunications(BUPT) Be Key Laboratory of Network System Architecture and Convergence (Beijing) School of Information and Co

ISBN: (纸本)9781457715860

A novel method for achieving practical real-time traffic classification is proposed in this paper, which is based on C4.5 decision tree. Most existing traffic classification algorithms only focus on accuracy of the classification results, but lack of considering the various costs in actual deployment. So they cannot guarantee that the obtained tree construction is optimal for hardware and software processing. To solve this problem, our Cost Based Feature Evaluation procedure defines VnitGainRatio as the metric of attributes to find the best tree construction when considering the attribute acquisition and processing cost We also introduce another method called Fuzzy Delicacy Node Selection procedure to choose the more suitable node, when their VnitGainRatio are too close to each other. The experiment results show that the proposed method reduces the average cost compared with similar algorithm.

关键词： Computer networks traffic classification decision tree machine learning

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LIMITED FEEDBACK SCHEME IN THE PRESENCE OF FEEDBACK DELAY USING KALMAN FILTER

LIMITED FEEDBACK SCHEME IN THE PRESENCE OF FEEDBACK DELAY US...

引用

2011 International Conference on Communications Technology and Applications(2011年通信技术与应用国际会议 ICCTA 2011)

作者： Fei Wang Tiankui Zhang Chunyan Feng Ruyue Li Yu-Ngok Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommun Advanced Wireless Research ZTE Corporation Shenzhen 518057 China

ISBN: (纸本)9781618399267

In this paper, a Best-M feedback scheme using Kalman filter is proposed to reduce the uplink feedback overhead in the presence of feedback delay. Best-M feedback scheme is an effective method to reduce the number of the channel quality information (CQI) feedback. However, the CQI feedback after the conventional Best-M decision is inaccurate for base station (BS) scheduling due to the feedback delay and the time varying nature of the channel. A modified limited feedback scheme is proposed to use a Kalman filter to compensate for the performance degradation caused by the feedback delay in Best-M feedback scheme. In the proposed scheme, the user equipment (UE) exploits a Kalman filter to predict the signal to interference plus noise ratio (SINR). Then, the UE makes the Best-M decision based on this predicted SINR and sends the corresponding CQI back to the BS. The simulation results show that the Best-M feedback scheme using Kalman filter, which achieves the same feedback reduction as the conventional scheme, improves the system spectral efficiency.

关键词： limited feedback Kalman filter feedback delay

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MOBILE USER TIME-OF-DAY REGULARITY ANALYSIS IN GPRS network

MOBILE USER TIME-OF-DAY REGULARITY ANALYSIS IN GPRS NETWORK

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2011 International Conference on Communications Technology and Applications(2011年通信技术与应用国际会议 ICCTA 2011)

作者： Luying Chen Wei Cheng Zhenming Lei Yinan Dou Laboratory of Network System Architecture and Convergence School of Information and Communication En Laboratory of Network System Architecture and Convergence School of Information and Communication E

ISBN: (纸本)9781618399267

The General Packet Radio Service (GPRS) has become a standard to extend the services provided by the Global system for Mobile Communications (GSM). The GPRS quickly penetrates into everyday life and the 24-hour always-on feature changes the user life. It also facilitates the new opportunity to understand the user behaviors. In this paper we present some observations of the GPRS, by disposing monitoring and analysis system at the Gn interface of real operational GPRS network. By analyzing the characteristics of the data, such as login time, logout time, delay of transmission and user attributes, the author provided a basis analysis of regular user behaviors using user attribute pattern clustering. From this observation, the time-of-day behavior gives better indication of mobile user behaviors in GPRS network.

关键词： GPRS GTP User Behavior Time-of-Day Regularity Analysis

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A Model Analyzing Method for OWL-S Services Composition Based on High Level Petri Net

A Model Analyzing Method for OWL-S Services Composition Base...

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

作者： Shaoran Dong Zengzhi Li State key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Institute of Computer System Architecture and Network Xi''an Jiaotong University Xi'an China

To analyze model of Web services composition, firstly analyze and abstract dataflow and control construct in OWL-S process to build high level Petri net model, then describe Petri net in Poses++ language, at last simulate Petri net with Poses++ to check data type and deadlock and calculate service performance. The experiment shows that this model analyzing method is able to accomplish type checking and deadlock and performance analyzing.

关键词： Performance analysis Web services system recovery Data analysis Petri nets Ontologies OWL Analytical models Knowledge acquisition Computer networks

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Particle Swarm Algorithm for the Quality of Service-Oriented Web Services Selection

Particle Swarm Algorithm for the Quality of Service-Oriented...

引用

International Symposium on Knowledge Acquisition and Modeling, KAM

作者： Hong Xia Zengzhi Li State key Laboratory of Networking and Switch Technology Beijing University of Posts and Telecommunications Beijing China Institute of Computer System Architecture and Network Xi''an Jiaotong University Xi'an Shaanxi China

Existing Web services composition technology, lack of services selecting. A particle swarm optimization algorithm based on the multi-objective optimization strategies was provided to address quality of services to choose the issue of global optimization. It is to transform Web services select the overall optimization problem with QoS into a multi-objective constrained optimization problem based on Qos, using multi-objective PSO intelligent theory, by a number of Qos parameters optimized at the same time, and ultimately produce a set of constraints to meet the Pareto optimal solution. The experimental results show the feasibility and efficiency of the algorithm.

关键词： Particle swarm optimization Web services Quality of service Constraint optimization Pareto optimization Service oriented architecture Switches Constraint theory Logic Optimization methods

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