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IEEE International Conference on Data Mining (ICDM)

作者： Xiang Niu Lusong Li Xiaobing Xiong Daniel Tkach He Li Ke Xu State Key Laboratory of Software Development Environment Beihang University Beijing China National Digital Switching System Engineering and Technological Research and Development Center Beijing China University of Science and Technology Beijing Beijing China

ISBN: (纸本)9781457720758

Page Rank has been widely used in ranking retrieval results on the web, finding the top influential papers in citation networks or detecting valuable users in online social networks. However, in practice, it is usually hard to obtain a complete structure of any above networks to rank nodes. Thus, some researchers have begun to explore how to get estimated ranks efficiently without acquiring the whole network. They have proposed some approximating methods, however, it is difficult to determine which method is the best one or which is suitable to a certain application. In this case, we set experiments in small-world and scale-free generated networks to certify the feasibility and characteristics of four approximating methods. We also use eleven real networks to mention different optimal conditions for these methods. We find the DIG Rank method performs better than other local estimation methods in almost every given sub graph. Besides, Mean field approach method tends to perform well in networks that have low average shortest path length, small amount of nodes with the same low in degree, or weak community structure. Finally, we apply the most versatile method DIG Rank to Sina micro-blog website to precisely classify users in a group as elites, grassroots or mummy users.

关键词： Accuracy Electronic mail Neodymium Social network services Error analysis Correlation Fans

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Theoretical mean-variance relationship of IP network traffic based on ON/OFF model

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Science in China(Series F) 2009年第4期52卷 645-655页

作者： JIN Yi ZHOU Gang JIANG DongChen YUAN Shuai WANG LiLi CAO JianTing State Key Laboratory of Software Development Environment Beihang University Beijing 100191 China School of Computer Science & Engineering Beihang University Beijing 100191 China National Digital Switching System Engineering & Technological Research Center Zhengzhou 450002 China

Mean-variance relationship （MVR）, nowadays agreed in power law form, is an important function. It is currently used by traffic matrix estimation as a basic statistical assumption. Because all the existing papers obtain MVR only through empirical ways, they cannot provide theoretical support to power law MVR or the definition of its power exponent. Furthermore, because of the lack of theoretical model, all traffic matrix estimation methods based on MVR have not been theoretically supported yet. By observing both our laboratory and campus network for more than one year, we find that such an empirical MVR is not sufficient to describe actual network traffic. In this paper, we derive a theoretical MVR from ON/OFF model. Then we prove that current empirical power law MVR is generally reasonable by the fact that it is an approximate form of theoretical MVR under specific precondition, which can theoretically support those traffic matrix estimation algorithms of using MVR. Through verifying our MVR by actual observation and public DECPKT traces, we verify that our theoretical MVR is valid and more capable of describing actual network traffic than power law MVR.

关键词： traffic matrix mean-variance relationship self-similar

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Network traffic simulation based on network processor

Network traffic simulation based on network processor

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2009 International Conference on Advanced Technologies for Communications, ATC 2009

作者： Yuan, Shuai Zhou, Gang Tian, Baochao Jin, Yi State Key Laboratory of Software Development Environment Beihang University Beijing China National Digital Switching System Engineering and Technological Research Center Information Engineering University Zhengzhou China

ISBN: (纸本)9781424451395

Achievements of network traffic simulation provide realistic, feasible and accurate methods of measuring bandwidth, latency, jitter and so on. However as the development of networking technology, traditional manners are becoming insufficient to provide high bandwidth matching the real network, nor accurate statistics characteristic such as self-similarity. In this paper we propose the Network Traffic Simulation platform based on Network Processor (NTS-NP). The platform has achieved: 1) high bandwidth and real-time traffic generation;2) high precision of self-similarity of the flow, which is now considered to be one of the basic characteristics of network traffic. In our platform, Cavium OCTEON CN3860 is chosen as the core in order to gain the ability of high speed packets assembling and transmitting, and direct control of the interface hardware. ON/OFF aggregation model is implemented to generate self-similarity and a discrete-event driven based algorithm is proposed to improve the traditional implementation of the model. We estimate the Hurst parameter of synthetic traffic by R/S statistics method and wavelet estimator. The validation of the platform is also empirically discussed and proved. ©2009 IEEE.

关键词： Bandwidth

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High bandwidth real-time network traffic generation with self-similarity

High bandwidth real-time network traffic generation with sel...

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2009 International Conference on Computational Intelligence and software Engineering, CiSE 2009

作者： Yuan, Shuai Zhou, Gang Jin, Yi State Key Laboratory of Software Development Environment Beihang University Beijing China National Digital Switching System Engineering and Technological Research Center Information Engineering University Zhengzhou China

ISBN: (纸本)9781424445073

Network traffic generation has always been a hot spot in network measurement and simulation research. However, traditional methods of generating network traffic are either insufficient in fulfilling bandwidth requirement or matching the characteristics of a real network. In this paper we propose a platform of generating high bandwidth real-time network traffic with self-similarity characteristic. The high bandwidth real-time generating feature guarantees the feasibility and self-similarity characteristic makes the platform more reliable. In the platform, we choose Cavium OCTEON CN3860 as the core and implemented ON/OFF aggregation model in a discrete-event way. The Hurst parameter of synthetic traffic is estimated both by R/S statistics method and wavelet estimator. Although there are differences between two estimators in various kinds of conditions, the validation of the platform is empirically discussed and proved. ©2009 IEEE.

关键词： Bandwidth

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Comparing three algorithms of implementing ON/OFF aggregation model

Comparing three algorithms of implementing ON/OFF aggregatio...

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2009 International Conference on Computational Intelligence and software Engineering, CiSE 2009

ISBN: (纸本)9781424445073

ON/OFF aggregation model is one of the efficient and accurate models for self-similar network traffic generation. In this paper we propose and compare three algorithms of implementing ON/OFF aggregation model, based on Cavium OCTEON CN3860 network processor, aimed to achieve high-bandwidth and real-time network traffic generation. The model is implemented in a multi-thread approach, in a token-bucket approach and in a discrete-event approach. The Hurst parameter of synthetic traffic is estimated by wavelet estimator, and the validation of the last algorithm is empirically discussed and proved. ©2009 IEEE.

关键词： Network traffic simulation ON/OFF aggregation model Self-similarity

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A new vertical handover mechanism for convergence of wired and wireless access networks

A new vertical handover mechanism for convergence of wired a...

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International Conference on Information Networking

作者： Soohong Park Pyung-Soo Kim Application Software Laboratory Digital Media Research and Development Center Samsung Electronics Company Limited Suwon South Korea System Software Solution Laboratory Department of Electronics Engineering Korea Polytechnic University Siheung South Korea

ISBN: (纸本)9781424445264

This paper proposes a vertical handover mechanism for mobile devices to keep connection with the Internet in wired and wireless coexistence networks. To support vertical handover between two heterogeneous access networks, the intermediate driver including a virtual mini-port driver and a virtual protocol driver is developed newly. Then, an actual IP address is assigned to the virtual mini-port driver. In addition, the intermediate driver includes the media independent handover (MIH) function of IEEE 802.21 standards group for efficient converging of two heterogeneous adapters. When communication via the running adapter gets disconnected while in service, the disconnection of the running adapter is automatically detected by the MIH function and then handover occurs by mapping information on the other adapter to the virtual adapter. Using the proposed handover mechanism, the session can be continued seamlessly even when handover between heterogeneous network adapters occurs at lower level in Internet applications. To evaluate the proposed handover mechanism, actual experiments are performed for wired and wireless coexistence networks using various Internet applications, and then their results are discussed.

关键词： Convergence Wireless networks IP networks Nonhomogeneous media Bridges Cities and towns Driver circuits Wireless LAN Protocols research and development

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pService: Towards Similarity Search on Peer-to-Peer Web Services Discovery

pService: Towards Similarity Search on Peer-to-Peer Web Serv...

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International Conference on Advances in P2P systems (AP2PS)

作者： Gang Zhou Jianjun Yu National Digital Switching System Engineering and Technological Research and Development Center China State Key Laboratory of Software Development Environment Beihang University China Computer Network Information Center Chinese Academy and Sciences China

We present the design of pService system for P2P Web services discovery supporting similarity search with its locality-preserving feature based on modified Skip Graph. In pService, the most important property (e.g. service name) of a service is viewed as the indexing key of a peer node. The other properties are extracted as multiattributes which would be mapped into one-dimensional indices using HSFC (Hilbert Space Filling Curve), and assigned to membership vector of the peer node. These two features help to support similarity search in two aspects: peer nodes with similar indexing keys would be distributed neighborly, peer nodes with similar indices will connect to each other through routing table. Our evaluation showed that the pService performs considerable Web services discovery efficiency.

关键词： Peer to peer computing Web services Indexing Routing Hilbert space Filling Search engines Data structures Switching systems Design engineering

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Network traffic simulation based on Network Processor

Network traffic simulation based on Network Processor

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International Conference on Advanced Technologies for Communications, ATC

作者： Shuai Yuan Gang Zhou Baochao Tian Yi Jin State Key Laboratory of Software Development Environment Beihang University Beijing China National Digital Switching System Engineering & Technological Research Center Information Engineering University Zhengzhou China

Achievements of network traffic simulation provide realistic, feasible and accurate methods of measuring bandwidth, latency, jitter and so on. However as the development of networking technology, traditional manners are becoming insufficient to provide high bandwidth matching the real network, nor accurate statistics characteristic such as self-similarity. In this paper we propose the Network Traffic Simulation platform based on Network Processor (NTS-NP). The platform has achieved: 1) high bandwidth and real-time traffic generation; 2) high precision of self-similarity of the flow, which is now considered to be one of the basic characteristics of network traffic. In our platform, Cavium OCTEON CN3860 is chosen as the core in order to gain the ability of high speed packets assembling and transmitting, and direct control of the interface hardware. ON/OFF aggregation model is implemented to generate self-similarity and a discrete-event driven based algorithm is proposed to improve the traditional implementation of the model. We estimate the Hurst parameter of synthetic traffic by R/S statistics method and wavelet estimator. The validation of the platform is also empirically discussed and proved.

关键词： Telecommunication traffic Traffic control Bandwidth Statistics Communication system traffic control Delay Jitter Character generation Assembly Hardware

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High Bandwidth Real-Time Network Traffic Generation with Self-Similarity

High Bandwidth Real-Time Network Traffic Generation with Sel...

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International Conference on Computational Intelligence and software Engineering (CiSE)

作者： Shuai Yuan Gang Zhou Yi Jin State Key Laboratory of Software Development Environment Beihang University Beijing China National Digital Switching System Engineering & Technological Research Center Information and Engineering University Zhengzhou China

关键词： Bandwidth Telecommunication traffic Traffic control Computational modeling Character generation Computer networks Delay Circuit simulation Application specific integrated circuits Hardware

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Comparing Three Algorithms of Implementing ON/OFF Aggregation Model

Comparing Three Algorithms of Implementing ON/OFF Aggregatio...

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International Conference on Computational Intelligence and software Engineering (CiSE)

关键词： Traffic control Telecommunication traffic Computational modeling Bandwidth Computer networks Delay Hardware Application specific integrated circuits software algorithms Programming

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