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

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The evaluation measure study in network traffic multi-class classification based on AUC

The evaluation measure study in network traffic multi-class ...

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International Conference on Information and Communication Technology convergence (ICTC)

作者： Jie Yang Yixuan Wang Chao Dong Gang Cheng Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China Microsoft Corporation Redmond USA

Internet traffic monitoring and traffic characterization are essential for managing and optimizing network infrastructures. In general, the traffic classifier based on Machine Learning (ML) might not perform well for some cases such as imbalanced data sets. To address this issue, we propose an evaluation measure aiming for the case of imbalance multi-class network traffic classification based on the multi-objective metric, the area under the ROC (Receiver Operating Characteristic) curve, or simply AUC. The experiments show that our method is more sensitive in the case that the Minority classes being misclassified into the Majority classes than the otherwise. Hence, we could use this measure to evaluate the classifier performance in the distinguishing of misclassifying the Minority applications into the Majority applications.

关键词： Accuracy Telecommunication traffic Monitoring Measurement Payloads Internet Data mining

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An Overlapped Clustering Scheme of Coordinated Multi-Point Transmission for LTE-A systems

An Overlapped Clustering Scheme of Coordinated Multi-Point T...

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2012 IEEE 14th International Conference on Communication Technology

作者： Jingjing Zhao Tiankui Zhang Zhimin Zeng Qiubin Gao Shaohui Sun Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications State Key Laboratory of Wireless Mobile Communications (CATT)

ISBN: (纸本)9781467321006

In this paper,we propose an overlapped clustering scheme to decide the cooperation cells for coordinated multi- point (CoMP) *** the scenario of joint processing of CoMP,the cooperated cells jointly transmit for users so the inter- cell interference among the cooperation cells are ***,the cluster-edge users suffer from the inter-cluster *** overlapping patterns are defined for the cluster-edge users to make sure that these users become the overlapping cluster-center *** the overlapping patterns and clusters are allocated orthogonal frequency resource,which can cancel inter-cluster interference and improve the performance of cell-edge *** results show that the proposed overlapped clustering scheme yields significant improvement to cell-edge users’ spectrum efficiency as well as increasing average cell throughput.

关键词： CoMP overlapped clustering pattern

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Spectrum sensing algorithms for cognitive radio based on polarization vector's orientation

Spectrum sensing algorithms for cognitive radio based on pol...

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2012 IEEE Global Communications Conference (GLOBECOM)

作者： Caili Guo Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing Beijing CN

In this paper, we propose a new blind spectrum sensing method based on the polarization vector's orientation characteristics of the received signal. We first discuss a spectrum sensing model based on polarization characteristic and develop the directional statistics of a polarization vector which can be used to discriminate the signal and noise. Then, a new polarization sensing algorithm (GLRT-PV) is introduced based on the generalized likelihood ratio test (GLRT) paradigm. Applying the recent advances in directional statistics, we derive closed-form expressions of both the probability of false alarm and the probability of detection. Our simulation results show that the proposed GLRT-PV method exhibits better performance than other existing methods in the case of unknown primary transmitter polarization and/or in the presence of noise power uncertainty.

关键词： Sensors Signal to noise ratio Transmitting antennas Cognitive radio Receiving antennas Radar antennas Electromagnetics

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A power-saving scheduling algorithm for mixed multicast and unicast traffic in MBSFN

A power-saving scheduling algorithm for mixed multicast and ...

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Computing, Communications and Applications Conference (ComComAp)

作者： Chaoan Wu Xuekang Sun Tiankui Zhang 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 and Telecommunications Beijing China

In this paper, A power-saving scheduling algorithm (PSA) for mixed multicast and unicast traffic is proposed in multicast and broadcast single frequency network (MBSFN). This algorithm is designed on the purpose of reducing the terminal's energy consumption and improving system capacity. By MBSFN area scheduling scheme the throughput of multicast users is increased. And the users' energy consumption is reduced by decreasing the transition times between sleeping and active status in the use of discontinuous reception (DRX) mechanism which is applied for terminal's battery power saving in LTE. The simulation results show that the proposed strategy gains an improvement both in system throughput and the terminal's energy efficiency.

关键词： Resource management Unicast Throughput Scheduling Switches Energy consumption Energy efficiency

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A self-adaptive energy efficient transmission mechanism in relay based cellular network

A self-adaptive energy efficient transmission mechanism in r...

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2012 International Symposium on Communications and Information Technologies, ISCIT 2012

作者： Kang, Tian Sun, Xuekang Zhu, Yutao Zhang, Tiankui 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 and Telecommunications Beijing China

ISBN: (纸本)9781467311571

In cellular networks, multiple relay nodes can be deployed in one cell, so there are three transmission modes, direct transmission (DT), two-hop transmission (TT) and cooperative transmission (CT). Combining with the node sleeping method for power saving, different transmission modes will have different energy efficiency for different user equipment (UE). In this paper, a self-adaptive energy efficient transmission (SEET) mechanism is proposed, in which energy efficient relay selection is taken into account to maximize the area energy efficiency (AEE) of each transmission mode. For each UE, it adaptively adjusts the current transmission mode for AEE maximization. The simulation results show that the proposed SEET mechanism has the maximum AEE compared to the mechanisms of only one mode. © 2012 IEEE.

关键词： Energy efficiency

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A CROSS-PLATFORM CONTEXT-AWARE APPLICATION DEVELOPING FRAMEWORK FOR MOBILE TERMINALS

A CROSS-PLATFORM CONTEXT-AWARE APPLICATION DEVELOPING FRAMEW...

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2012 IEEE 2nd International Conference on Cloud Computing and Intelligence systems

作者： Pingyi Wang Jingling Zhao Qing Liao School of Computer Science Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

The increasing number of mobile terminals facilitates the development of context-aware applications. However, developing a context aware application is still a complex work, which involves mechanisms of context acquisition and context processing. In order to release the developer’s burden, many context aware frameworks emerged. But none of them yet has sufficient consideration of mobile environment characteristics. Besides, restricted to the mobile platform, the developed application could not achieve cross-platform deployment. A cross-platform context-aware application developing framework for mobile terminals is proposed in this paper. This framework could shield system differences, centralize context acquisition, context modeling, context storing, context interpretation and context aggregation for many context aware applications on the same terminal. Applying the framework, data of same sensor would not be duplicated processed by many context aware applications. Context aware application would be built faster. And mobile terminal resources would be used more efficiently.

关键词： Context-awareness Cross-platform Mobile terminal Framework

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THE PACKET SIZE DISTRIBUTION PATTERNS OF THE TYPICAL INTERNET APPLICATIONS

THE PACKET SIZE DISTRIBUTION PATTERNS OF THE TYPICAL INTERNE...

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The 3rd IEEE International Conference on network Infrastructure and Digital Content (2012年第三届IEEE网络基础设施与数字内容国际会议(IEEE IC-NIDC2012))

作者： Fang Liu Xiaolong Wu Weimin Li Xiaonan Liu Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

The identification and classification of network traffic is an important prerequisite for network management,traffic engineering and other *** summarize the packet size distribution patterns of the lnternet application traffic,we collected flow record data from the intemet and analyzed the packet size distribution patterns of typical *** the packet size distribution patterns of single application servers of typical applications,we found the differences of the packet size distribution in different *** we clustered and analyzed different packet size distribution patterns for typical applications,and found that a typical Internet application could contain more than one packet size distribution ***,from the characteristics of these applications,we explain the causes of these distribution patterns.

关键词： Packet size distribution pattern Typical application Cluster

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A REGULAR EXPRESSION GROUPING ALGORITHM BASED ON PARTITIONING METHOD

A REGULAR EXPRESSION GROUPING ALGORITHM BASED ON PARTITIONIN...

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The 3rd IEEE International Conference on network Infrastructure and Digital Content (2012年第三届IEEE网络基础设施与数字内容国际会议(IEEE IC-NIDC2012))

作者： Gang He Yang Wang Xiaochun Wu Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication EngineeringBeijing University of Posts and Telecommunications Beijing 100876 China

Owing to the strong character expressive power,regular expressions gradually replace explicit string and become the first choice of patterns describing *** the current network security products,huge amount of patterns lead to dramatic increase of the DFA storage space and affect the efficiency of *** paper presents a regular expression grouping algorithm based on partitioning *** reduces the total number of DFA states and improves the matching performance which is also suitable for multi-core processor.

关键词： Regular expression DFA Partitioning method Multi-core processor

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A Game Theory-Based Asymmetric Multi-channel Selection Algorithm in Wireless Ad Hoc networks

A Game Theory-Based Asymmetric Multi-channel Selection Algor...

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2012 IEEE 14th International Conference on Communication Technology

作者： Jingrong Wen Muqing Wu Lv Bo Wang Dongyang Qinpeng Zhang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Huadian Zhangqiu Electric Co. Ltd

ISBN: (纸本)9781467321006

While multi-channel allocation has been studied in many networks by different theories,asymmetric channel characteristics are seldom *** paper considers the channel selection problem in wireless Ad hoc networks from the game-theoretic viewpoint,which is based on the assumption that quality discrepancy exists between the candidate channels.A simple saturation throughput model is presented to quantify to the utility of each *** mixed Nash Equilibrium (NE) model is used to analyze the channel selection,and a mixed strategy algorithm is proposed to maximize the throughput and also improve the fairness of channel *** results confirm that the proposed mixed game model is effective,and the mixed strategy can improve the network throughput greatly.

关键词： Ad hoc networks channel selection game theory Nash Equilibrium

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I-HASH MULTIPLE VARIOUS POSITION PATTERN MATCHING ALGORITHM IN INTERNET APPLICATIONIDENTIFICATION

I-HASH MULTIPLE VARIOUS POSITION PATTERN MATCHING ALGORITHM ...

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The 3rd IEEE International Conference on network Infrastructure and Digital Content (2012年第三届IEEE网络基础设施与数字内容国际会议(IEEE IC-NIDC2012))

作者： Gang He Bo Sun Yang Liu Xiaochun Wu Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

The efficiency of multiple pattern matching is the core technology of Deep Packet Inspection and it is important to the real word of internet traffic *** this research we propose a new multiple pattern matching technique for the fixed pattern in the packet load,which is called I-HASH multiple various position pattern matching *** is used to improve the matching speed through the *** algorithm is implemented in our experiments and compared with the existing *** results demonstrate that our algorithm is much more effective than STRCMP algorithm,especially when the number of patterns is quiet *** will be extraordinarily helpful in the areas of Internet application identification system and network intrusion detection system and so on,which contain huge amounts of fixed patterns.

关键词： DPI Multiple pattern matching Internet application identification Iterated HASH algorithm

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