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IEEE International Conference on High Performance Computing and Communications (HPCC)

作者： Hui Gao Chi Harold Liu Wendong Wang Zhengguo Sheng Alvin Chin Ye Tian School of Software Engineering Beijing University of Posts and Telecommunications China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications China School of Software Beijing Institute of Technology China BMW Group USA University of Sussex UK

Participatory sensing campaigns encourage ordinary people to collect and share sensing data by using their portable smart devices like smartphones, iPad and iWatch. However, compared with static sensors that are deployed in the particular places by people that can provide high-quality data, the quality of sensing data that are collected from smart devices is uncontrollable, and it is costly to pay data usage without knowing the credibility of the collected data. In this paper, we propose to leverage the participant's reputation to maximize total data credibility under budget constraint for participatory sensing systems. Specifically, we formally define a maximum sensing data credibility problem and present a trustable participants selection algorithm to obtain a near optimal solution. Provided the real data set, it has been shown by simulation results that our proposed algorithm selects more credible sensing data than that of the other two comparison algorithms.

关键词： Sensors Simulation Telecommunications Smart phones Tablet computers Optimization

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Deco: False data detection and correction framework for participatory sensing

Deco: False data detection and correction framework for part...

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International Workshop on Quality of Service

作者： Long Cheng Linghe Kong Chengwen Luo Jianwei Niu Yu Gu Wenbo He Sajal Das State Key Lab of Networking & Switching Tech. Beijing Univ. of Posts & Telecomm. Beijing China State Key Lab of Virtual Reality Technology and Systems Beihang University Beijing China McGill University Canada National University of Singapore Singapore IBM Research Austin USA Missouri University of Science and Technology USA

Participatory sensing enables to collect a vast amount of data from the crowd by allowing a wide variety of sources to contribute data. However, the openness of participatory sensing exposes the system to malicious and erroneous participations, inevitably resulting in poor data quality. This brings forth the important issues of false data detection and correction in participatory sensing. Furthermore, data collected by participants normally include considerable missing values, which poses challenges for accurate false data detection. In this work, we propose DECO, a general framework to detect false values for participatory sensing in the presence of missing data. By applying a tailored spatio-temporal compressive sensing technique, DECO is able to accurately detect the false data and estimate both false and missing values for data correction. We validate our design through an experimental case study.

关键词： Sensors Quality of service IEEE 802.11 Standard Atmospheric measurements Particle measurements Compressed sensing Estimation

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Distributed Virtual Network Embedding with Bloom Filter

Distributed Virtual Network Embedding with Bloom Filter

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IEEE International Conference on Smart City

作者： Sude Qing Min Feng Hua Jin China Academy of Telecommunication Research State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications

ISBN: (纸本)9781509018949

As a disruptive technology, Network Virtualization plays an increasingly important role in Cloud Computing by allowing multiple heterogeneous virtual networks to run on a shared infrastructure as independent slices. However, it is a big challenge to map multiple virtual networks onto specific nodes and links in the shared substrate network, known as the Virtual Network Embedding (VNE) problem. Most existing solutions are provided in a centralized way, which may have hot spot problem. In this paper, by leveraging the learning and inference technology, a novel VNE algorithm is proposed to achieve the embedding in a distributed way. Instead of flooding, Bloom Filter is introduced to synchronize the mapping information, without generating massive communication overhead. The results of comparison between existing algorithms and the proposed algorithm show that our distributed algorithm has acceptable, even better performance in terms of long-term average revenue and acceptance ratio.

关键词： Network Virtualization Cloud Comuputing Virtual Network Embedding Learning & Inference Bloom Filter

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An Adaptive Energy-aware Virtual Network Embedding Scheme

An Adaptive Energy-aware Virtual Network Embedding Scheme

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IEEE Vehicular technology Conference

作者： Hui Liu Hongyan Cui Jia Wang Bo Lu Jianya Chen State Key Lab. of Networking and Switching Technology

ISBN: (纸本)9781479944811

Through virtualization, networks can be managed efficiently and securely. Energy-efficiency is one of the main challenges in networking environment. In this paper, an Adaptive Energy-aware Virtual Network Embedding Scheme (AE-VNE) based on traffic fitting is proposed to reduce the energy consumption of core nodes and links in network virtualization framework. An adaptive method to choose suitable VNE algorithm for different situation is devised with assistance of traffic fitting. An energy-aware virtual network embedding algorithm is proposed for energy conservation and QoS constraints simultaneously. The simulation results prove that our scheme can save up to 82% energy consumption without impacting on most embedding quality metrics.

关键词： Network virtualization Virtual network embedding Traffic fitting Energy-awareness Adaptive method

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Novel way to research nonlinear feedback shift register

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Science China(Information Sciences) 2014年第9期57卷 161-174页

作者： ZHAO DaWei PENG HaiPeng LI LiXiang HUI SiLi YANG YiXian Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and Telecommunications Zhejiang Provincial Key Lab of Data Storage and Transmission Technology Hangzhou Dianzi University National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Shandong Provincial Key Laboratory of Computer Network Shandong Computer Science Center

In this paper,we regard the nonlinear feedback shift register(NLFSR)as a special Boolean network,and use semi-tensor product of matrices and matrix expression of logic to convert the dynamic equations of NLFSR into an equivalent algebraic *** on them,we propose some novel and generalized techniques to study ***,a general method is presented to solve an open problem of how to obtain the properties(the number of fixed points and the cycles with different lengths)of the state sequences produced by a given NLFSR,i.e.,the analysis of a given *** then show how to construct all 22n-(l-n)/22n-lshortest n-stage feedback shift registers(nFSR)and at least 22n-(l-n)-1/22n-l-1shortest n-stage nonlinear feedback shift registers(nNLFSR)which can output a given nonperiodic/periodic sequence with length ***,we propose two novel cycles joining algorithms for the construction of full-length ***,two algorithms are presented to construct 22n-2-1different full-length nNLFSRs,respectively.

关键词： nonlinear feedback shift register semi-tensor product Boolean network full-length nNLFSR binary sequence

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Dynamic sleeping algorithm of base station based on spatial features

Dynamic sleeping algorithm of base station based on spatial ...

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International Conference on Telecommunications (ICT)

作者： Hui Liu Hongyan Cui Jianya Chen State Key Lab. of Networking and Switching Technology

Since access networks are deployed to support peak traffic, part of base stations always keep active during off-peak period, resulting energy dissipation. In this paper, we propose a dynamic Base Station (BS) sleeping algorithm to reduce energy consumption, which exploits dynamic characteristics of mobile data traffic on time and spatial dimensions. Our novel approach aims to improve energy efficiency in wireless access network by optimizing the power utilization, and keep Quality-of-Service (QoS) guaranteed by taking advantage of the nonuniform spatial distribution of User Equipments (UEs). Simulations using ideal traffic profiles are evaluated to quantify the potential savings from dynamic BS sleeping in a realistic setting and prove the feasibility of slight effects on network performance.

关键词： Redundancy Switches Energy consumption Business Heuristic algorithms Quality of service Wireless networks

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Freeway: Adaptively isolating the elephant and mice flows on different transmission paths 22

Freeway: Adaptively isolating the elephant and mice flows on...

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22nd IEEE International Conference on Network Protocols, ICNP 2014

作者： Wang, Wei Sun, Yi Zheng, Kai Kaafar, Mohamed Ali Li, Dan Li, Zhongcheng Institute of Computing Technology CAS China State Key Laboratory of Networking and Switching Technology China University of Chinese Academy of Science China IBM China Research Lab China NICTA China Tsinghua University China

ISBN: (纸本)9781479962044

The network resource competition of today' data enters is extremely intense between long-lived elephant flows and latency-sensitive mice flows. Achieving both goals of high throughput and low latency respectively for the two types of flows requires compromise, which recent research has not successfully solved mainly due to the transfer of elephant and mice flows on shared links without any differentiation. However, current data enters usually adopt clos-based topology, e.g. Fat-tree/VL2, so there exist multiple shortest paths between any pair of source and destination. In this paper, we leverage on this observation to propose a flow scheduling scheme, Freeway, to adaptively partition the transmission paths into low latency paths and high throughput paths respectively for the two types of flows. An algorithm is proposed to dynamically adjust the number of the two types of paths according to the real-time traffic. And based on these separated transmission paths, we propose different flow type-specific scheduling and forwarding methods to make full utilization of the bandwidth. Our simulation results show that Freeway significantly reduces the delay of mice flow by 85.8% and achieves 9.2% higher throughput compared with Hedera. © 2014 IEEE.

关键词： Scheduling

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Improving the stability in overlay and native networks

Improving the stability in overlay and native networks

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International Global Information Infrastructure Symposium (GIIS)

作者： Jun Gong Jianxin Liao Jingyu Wang Qi Qi Di Yang Min Feng State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications China

The objective of overlay routing is to minimize the latency of overlay users, while the objective of traffic engineering is to minimize the maximum link utilization of overall network. Thus, there exists the interaction between overlay routing and traffic engineering in the multi-layer network topology, which may lead to endless routing oscillations and performance degradation in the network. In order to solve the oscillation problem, we propose an alternative-offers bargaining model to investigate the interaction process. We view each route of two players as an offer. With the knowledge from the previous round, two strategies are introduced in each offer to weaken the inevitable conflict between two players. The simulation results show that our proposed strategies can improve the default interaction and achieve satisfactory results at the stable state.

关键词： Routing Overlay networks Oscillators Games Optimization Network topology Simulation

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Sequential and adaptive sampling for matrix completion in network monitoring systems

Sequential and adaptive sampling for matrix completion in ne...

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IEEE Annual Joint Conference: INFOCOM, IEEE Computer and Communications Societies

作者： Kun Xie Lele Wang Xin Wang Gaogang Xie Guangxing Zhang Dongliang Xie Jigang Wen College of Computer Science and Electronics Engineering Hunan University Changsha China State Key Lab of Networking & Switching Tech. Beijing Univ. of Posts and Telecomm. China Department of Electrical and Computer Engineering State University of New York at Stony Brook USA Institute of Computing Technology Chinese Academy of Sciences Beijing China DNSLAB China Internet Network Information Center Beijing China

End-to-end network monitoring is essential to ensure transmission quality for Internet applications. However, in large-scale networks, full-mesh measurement of network performance between all transmission pairs is infeasible. As a newly emerging sparsity representation technique, matrix completion allows the recovery of a low-rank matrix using only a small number of random samples. Existing schemes often fix the number of samples assuming the rank of the matrix is known, while the data features thus the matrix rank vary over time. In this paper, we propose to exploit the matrix completion techniques to derive the end-to-end network performance among all node pairs by only measuring a small subset of end-to-end paths. To address the challenge of rank change in the practical system, we propose a sequential and information-based adaptive sampling scheme, along with a novel sampling stopping condition. Our scheme is based only on the data observed without relying on the reconstruction method or the knowledge on the sparsity of unknown data. We have performed extensive simulations based on real-world trace data, and the results demonstrate that our scheme can significantly reduce the measurement cost while ensuring high accuracy in obtaining the whole network performance data.

关键词： Monitoring Sparse matrices Matrix decomposition Computers Accuracy Conferences Internet

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Smartphone-based video surveillance system

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Journal of Computational Information Systems 2014年第17期10卷 7637-7644页

作者： Ling, Wenjing Zheng, Limin Wang, Tianzi Wu, Ping Song, Zheng College of Information and Electrical Engineering China Agricultural University Beijing China Beijing Laboratory of Food Quality and Safety China Agricultural University Beijing China Tongfang Knowledge Network Technology Co. Ltd. Beijing China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

Smartphone based surveillance systems have gained popularity against camera-based surveillance systems for cost-efficiency and ease of deployment. However, existing smartphone-based surveillance systems need expensive additional devices to achieve the remote control functions of pan-tilt-zoom cameras, which limits their usage. In this paper, we present a smartphone-based video surveillance system with steering function and remote control operations. To realize the function of steering, a small clip is creatively used as a pedestal, while the vibration motor and digital compass embedded in the smartphone are responsible for rotation generating and orientation control, respectively. A set of protocols for remote control operations are also provided. Real-testbed based experiments show that the steering system is easy to deploy and very accurate, with an average rotation deviation less than 2.500 degrees. The latency of remote control under real network conditions is satisfactory, with an average time delay less than 5 seconds.

关键词： Smartphones

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