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Characterizing Internet Backbone Traffic Based on Deep Packets Inpection and Deep Flows Inspection

China Communications 2012年第5期9卷 42-54页

作者：杨洁袁仑林平丛蓉程钢尼万-安瑟瑞 Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Research Institution of China Mobile Microsoft Corporation RedmondUSA New Jersey Institute of Technology NewarkUSA

Based on the massive data collected with a passive network monitoring equipment placed in China＇s backbone, we present a deep insight into the network backbone traffic and evaluate various ways for inproving traffic classifying efficiency in this pa- per. In particular, the study has scrutinized the net- work traffic in terms of protocol types and signatures, flow length, and port distffoution, from which mean- ingful and interesting insights on the current Intemet of China from the perspective of both the packet and flow levels are derived. We show that the classifica- tion efficiency can be greatly irrproved by using the information of preferred ports of the network applica- tions. Quantitatively, we find two traffic duration thresholds, with which 40% of TCP flows and 70% of UDP flows can be excluded from classification pro- cessing while the in^act on classification accuracy is trivial, i.e., the classification accuracy can still reach a high level by saving 85% of the resources.

关键词： network traffic traffic characterization traffic monitoring packet flow

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DNCA:AN EFFICIENT CHANNEL ASSIGNMENT FOR MULTI-INTERFACE MULTI-CHANNEL AD HOC WIRELESS networkS

DNCA:AN EFFICIENT CHANNEL ASSIGNMENT FOR MULTI-INTERFACE MUL...

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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： Xiaowei Ni Chunxiu Xu Muqing Wu Jingrong Wen Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

The capacity of an IEEE 802.1 l-based multihop wireless network is *** effectively utilizing multiple non-overlapping channels and multiple interfaces,collision and co-channel interference can be *** allows more concurrent transmissions and thus enhances the network *** this paper,we introduce an efficient distributed negotiated channel assignment protocol,called *** each node,DNCA conducts a local optimization by greedy balancing the number of neighbors on each *** using DNCA,it does not require changes to higherlevel *** describe the design and implementation of DNCA,and analyze its performance using ns-3 network *** results show that DNCA provides much higher system capacity and lower end-to-end packet delay.

关键词： Ad Hoc networks Ns-3 Multiple channels Channel assignment

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A NO-REFERENCE PERCEPTUAL BLUR METRIC BASED ON COMPLEX EDGE ANALYSIS

A NO-REFERENCE PERCEPTUAL BLUR METRIC BASED ON COMPLEX EDGE ...

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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： Yongfeng Wang Haiqing Du Jingtao Xu Yong Liu Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

This paper presents an efficient no-reference blur metric where image quality is quantified by perceptual-based edge *** of statistical measurement of the whole image,it computes local statistics in the vicinity of detected edges at a largely reduced computational *** existing objective no-reference blur metrics,the proposed metric is able to distinguish blurred edges in a cost-effective *** of the proposed metric shows its high prediction accuracy when it is applied to Gaussian blurred *** using the LIVE blur database demonstrate that the proposed algorithm correlates well with subjective quality evaluations.

关键词： Image assessment, No-reference Blur Edge analysis

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BASE STATION SWITCHING BASED DYNAMIC ENERGY SAVING ALGORITHM FOR CELLULAR networkS

BASE STATION SWITCHING BASED DYNAMIC ENERGY SAVING 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： Tian Kang Xuekang Sun Tiankui Zhang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

Switching the base station (BS) with low traffic into sleep mode is considered as one of the most promising technologies for energy saving in the cellular *** this paper,*** on the switching method considering the quality of service (QoS) as well as energy saving of the whole *** network topology is modeled as a weighted affinity graph to describe the possible associations of user equipment (UEs) and the BSs in the *** the maximization problem of the network performance valued by the QoS and energy saving is *** on that,a dynamic energy saving (DES) algorithm is *** optimized by DES,the network is reconfigured by switching certain BSs into sleep *** results under different traffic conditions demonstrate that the proposed DES algorithm can significantly reduce energy consumption and improve the energy efficiency.

关键词： Green network Energy efficiency Base station switching

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network ABNORMAL DETECTION BASED ON BASELINE ENVELOPE

NETWORK ABNORMAL DETECTION BASED ON BASELINE ENVELOPE

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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： Luying Chen Weimin Li Xiaolong Wu Cuicui Wang Dazhong He Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

This paper discusses the problem of normal operation baselining for automatic detection of network anomalies.A traditional envelope baseline algorithm is presented and compared with an advanced version proposed in this *** capability that,the envelope should not only expand but also shrink,is supported during the baseline self-improving *** data based experiment shows various aspects of the results from the two algorithms,which proves the advantage of this algorithm.

关键词： Envelope baseline algorithm Baseline comparison Abnormal comparison

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Interference Mitigation in Two-Tier OFDMA Femtocell networks: A Potential Game Approach

Interference Mitigation in Two-Tier OFDMA Femtocell Networks...

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International Conference on Wireless Communications and Signal Processing

作者： Hao Wu Hailun Xia Chunyan Feng Sainan Li Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781467358309

The problem of interference mitigation in two-tier downlink orthogonal frequency division multiple access (OFDMA) femtocell networks is considered in this paper. We propose a potential game based distributed power control algorithm, aiming at maximizing the users' SINRs and improving the system capacity. With a penalty factor in system capacity as a utility function for macrocell and femtocell, a global optimization problem then turns into a local optimization problem with multi-iterations. Based on gradient projection response criterion, dynamically rational power allocation for each resource block is performed, achieving the coordination of interference between macrocell and femtocell and increasing system capacity. Simulation results show that the proposed scheme effectively reduces the system capacity loss and improves the throughput of macrocell users with minor performance degradation of the femtocell users. Moreover, the proposed scheme is easy to implement in a decentralized manner.

关键词： interference mitigation OFDMA femtocell potential game gradient projection power control

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A NEIGHBOR PEER SELECTION ALGORITHM BASED ON LOAD BALANCE IN MOBILE P2P STREAMING

A NEIGHBOR PEER SELECTION ALGORITHM BASED ON LOAD BALANCE IN...

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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： Hailun Xia Nana He Wu Hao Zhimin Zeng Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

In mobile peer to peer streaming system,to solve the influence brought by the load difference among cells,a neighbor peer selection algorithm based on load balance is *** the strategy,the comprehensive evaluation value of the candidate peer is achieved through the use of gray relation analysis theory on multi-attribute decision matrix including load balance degree,and then the neighbor peer list is got through ranking the comprehensive evaluation *** results show that with the peer selection scheme in mobile p2p streaming system,the system's bandwidth utilization and the user's average throughput are improved.

关键词： Peer selection Mobile p2p streaming Multi-attribute decision Gray relation analysis

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Survivability Analysis of Wireless Bypass-based Protection for Passive Optical network

Survivability Analysis of Wireless Bypass-based Protection f...

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2012 IEEE 14th International Conference on Communication Technology

作者： Huarui Sun Guochu Shou Yihong Hu Zhigang Guo School of Information and Communication Engineering Beijing Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

ISBN: (纸本)9781467321006

network survivability is becoming a key issue in Passive Optical networks (PONs).In conventional PONs,optical protection is applied to improve the network ***,optical protection may be considered cost-prohibitive for cost-sensitive access *** this paper,by establishing wireless links among ONUs,we propose a novel wireless bypass- based protection method which has two schemes: intra-domain wireless bypass and inter-domain wireless *** then present the survivability model of wireless bypass-based protection,and evaluate the survivability model by means of probabilistic analysis,taking both optical and wireless segments into account *** also compared the survivability with full optical protection,and our results highlight that the bypass-based protection method perform an improvement in *** addition,we quantitatively analyze the impact of probability of fiber link failure,wireless bypass links and wireless bypass distance on the network survivability.

关键词： passive optical network wireless bypass survivability protection

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RESEARCH ON CHARACTERIZING CHINESE MULTIMEDIA MESSAGING SERVICE (MMS)

RESEARCH ON CHARACTERIZING CHINESE MULTIMEDIA MESSAGING SERV...

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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： Chao Dong Bolun Huang Zheng Ma Zhenming Lei Jie Yang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beiiing 100876 China

Multimedia Messaging Service (MMS) is a standard way to send multimedia messages (MMs),is one of the most popular mobile data services in *** paper analyzed Chinese MMS based on a one-week MMS flow log collected from a commercial ISP covering an entire province in Southern *** the distribution of MMS transmission quantity each day,as well as the transmission speed and inter-arrival time ***,with the curve fitting approach,Weibull model was found to be the most appropriate for the distribution of inter-arrival time,which is able to apply to any further mobile network analyses related to the MMS inter-arrival time.

关键词： Mobile telecommunication network Multimedia messaging service MMs speed distribution Inter-arrival time

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Bandwidth-cost based QoS extension to OSPF

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International Journal of Advancements in Computing Technology 2012年第18期4卷 244-251页

作者： Li, Li Li, Yanjing Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications China International School Beijing University of Posts and Telecommunications China

The emerging of various applications in Internet leads to a technical challenge of quality of service (QoS) guarantee, which is much more critical in the coexisting multi-services scenarios especially. Traditional Open Shortest Path First (OSPF) protocol without QoS consideration has to be improved in order to be utilized efficiently in today's network. In this paper, an on-demand QoS routing mechanism is proposed, which has the main advantage of reaching the QoS demands of the upper layer services while keeping the minimum modification to the existing OSPF protocol. The core of this mechanism is a novel path selection algorithm, which aims to find the best route with minimum cost under the limits of bandwidth requirements. The function and performances of this BW-cost based QoS algorithm are simulated as well as compared to those of the standard Dijkstra algorithm, which is originally used in OSPF, and an existing on-demand QoS algorithm extended to OSPF. Simulation results validate the outstanding performance of the proposed algorithm on load balancing, network utilization and delay: it has the similar ability of load balancing to the existing on-demand QoS algorithm, a little better performance of network utility as well as a great better performance of delay than it, never mention that it exceeds the standard Dijkstra algorithm significantly on each performance parameters listed above.

关键词： Bandwidth

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