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Communication Networks and Services Research Conference (CNSR), 2011 Ninth Annual

Date 2-5 May 2011

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Displaying Results 1 - 25 of 53
  • [Front cover]

    Publication Year: 2011, Page(s): C1
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  • [Title page i]

    Publication Year: 2011, Page(s): i
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  • [Title page iii]

    Publication Year: 2011, Page(s): iii
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  • [Copyright notice]

    Publication Year: 2011, Page(s): iv
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  • Table of contents

    Publication Year: 2011, Page(s):v - ix
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  • Message from the Conference General Chair

    Publication Year: 2011, Page(s): x
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  • Message from the Conference Technical Program Co-chairs

    Publication Year: 2011, Page(s): xi
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  • Organizing Committee

    Publication Year: 2011, Page(s): xii
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  • Technical Program Committee

    Publication Year: 2011, Page(s):xiii - xv
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  • Reviewers

    Publication Year: 2011, Page(s):xvi - xviii
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  • Collaborative Spectrum Sensing in Cognitive Radio System - Performance Analysis of Weighted Gain Combining

    Publication Year: 2011, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (237 KB) | HTML iconHTML

    Cognitive radio (CR) is a novel approach to improving the spectral efficiency of licensed radio frequency bands by opportunistically accessing unused portions of the band without introducing interference to a licensed user. To reliably identify unused portions in a dynamic environment, a collaborative spectrum sensing (CSS) approach is known to be advantageous. In this article we will consider a w... View full abstract»

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  • Intelligent Power Management for QoS-Aware Multimedia in Cognitive Mesh Networks Using Reinforcement Learning

    Publication Year: 2011, Page(s):7 - 12
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (334 KB) | HTML iconHTML

    In cognitive multimedia mesh networks (CMMNs), unlicensed users (secondary users, SUs) can share the spectrum with licensed users (primary users, PUs) on a non-interfering basis. The main challenge in CMMN is how to implement an efficient optimal control policy that can allocate spectrum and transmission powers for the SUs efficiently and how to adapt these resources to the changing network condit... View full abstract»

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  • Cluster Size Optimization in Cooperative Spectrum Sensing

    Publication Year: 2011, Page(s):13 - 17
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (249 KB) | HTML iconHTML

    In this paper, we study and optimize the cooperation cluster size in cooperative spectrum sensing to maximize the throughput of secondary users (SUs). To calculate the effective throughput, we assume each SU spends just 1 symbol to negotiate with the other SUs in its transmission range. This is the minimum overhead required for each SU to broadcast its sensing decision to the other members of the ... View full abstract»

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  • Measurement Study on PPLive Based on Channel Popularity

    Publication Year: 2011, Page(s):18 - 25
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB) | HTML iconHTML

    In recent years, Peer-to-Peer (P2P) streaming systems experienced tremendous growth and became one of the largest bandwidth consumer on Internet. PPLive, one of the most popular applications in this category, is serving millions of registered users with hundreds of Live TV channels and millions of other video clips. Compared to the standard file sharing systems, the streaming service shows unique ... View full abstract»

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  • A Peer-to-Peer Model for XML Publish/Subscribe Services

    Publication Year: 2011, Page(s):26 - 32
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (531 KB) | HTML iconHTML

    This paper focuses on XML content delivery. Techniques for XML publish/subscribe delivery include unicast, flooding, IP multicast, and application-layer multicast. An important issue in the context of the state-of-the-art XML routing schemes is that the cost of filtering and aggregation is incurred at each hop. A new peer-to-peer model for XML pub/sub multicast service is described. The proposed m... View full abstract»

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  • ADDER: Probabilistic, Application Layer Service Discovery for MANETs and Hybrid Wired-Wireless Networks

    Publication Year: 2011, Page(s):33 - 40
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB) | HTML iconHTML

    Over the past years, Mobile ad-hoc networks (MANETs) have attracted a considerable degree of research attention, with service discovery, selection and invocation being among the topics of interest of previous efforts. In this paper we introduce ADDER, a probabilistic, hybrid, directory-less service discovery mechanism. It has been designed for military IPv6-based MANETs but will work in any hybrid... View full abstract»

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  • A Structural Analysis of Network Delay

    Publication Year: 2011, Page(s):41 - 48
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (418 KB) | HTML iconHTML

    Network delay is a crucial metric for evaluating the state of the network. We present in this paper a structural analysis of network delay, based on delay measurements of aback bone network. This delay analysis is performed using a subspace method called Principal Component Analysis (PCA). The analysis reveals that the delay time series can be decomposed into two constituents: a smooth periodic tr... View full abstract»

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  • Using Traffic Shaping to Improve Performance for Raw Data Transfer and Video Streaming

    Publication Year: 2011, Page(s):49 - 55
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1929 KB) | HTML iconHTML

    As networks and data transmission are becoming increasingly important for computational science, we are working on developing a visualization application that uses high-speed networks to aid scientists in their scientific exploration. However, we have identified a major issue in the performance of data transmission when rate-based UDP is used in parallel from multiple senders to a single receiver.... View full abstract»

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  • VisVerND: Visual Verification of Network Traffic Dataset

    Publication Year: 2011, Page(s):56 - 62
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (845 KB) | HTML iconHTML

    Captured network traffic data is generally used to evaluate, validate and analyze novel solutions for various network problems. Hence, the quality and the completeness of the network traffic dataset are important for the analysis to yield correct results. However, the quality of the network traffic dataset is never questioned. In this work, we propose a systematic methodology to visually verify th... View full abstract»

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  • Characterization of the IntelRate Controller for High-Speed Networks

    Publication Year: 2011, Page(s):63 - 68
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (355 KB) | HTML iconHTML

    Unlike other explicit congestion controllers that depend on the estimation of network parameters (such as link latency, bottleneck bandwidth, packet loss, or the number of flows) to compute the allowed source sending rate, the IntelRate controller can avoid this while maintaining good stability and robustness. Simulation results have verified these performances. In this paper, we theoretically inv... View full abstract»

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  • RRB-SIMD: RTP Rate-Based SIMD Protocol for Media Streaming Applications over the Internet

    Publication Year: 2011, Page(s):69 - 76
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (318 KB) | HTML iconHTML

    Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Intern... View full abstract»

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  • The Good, the Bad, the IPv6

    Publication Year: 2011, Page(s):77 - 84
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB) | HTML iconHTML

    As more network-capable devices are developed, it becomes easier for us to remain connected to our friends, colleagues, and even our homes. Unfortunately, it becomes easier for unintended third parties to remain connected to us as well. The impact of this has been limited by our proximity to the third party (i.e. the same local area network) -- until now. The Internet Protocol version 6 (IPv6) inc... View full abstract»

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  • Tuning Open-iSCSI for Operation over WAN Links

    Publication Year: 2011, Page(s):85 - 92
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB) | HTML iconHTML

    The relocation of live, running virtual machines from one physical host to another is a new and very desirable function because it provides a variety of features, including resilience to failures and flexibility of location. The data transfers required for live migration are supported in several commercial products by a protocol called iSCSI (Internet SCSI), which runs on top of TCP. We thoroughly... View full abstract»

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  • Enhanced QoS Support in Certified Wireless USB

    Publication Year: 2011, Page(s):93 - 100
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB) | HTML iconHTML

    Certified Wireless Universal Serial Bus (WUSB) is one of different varieties of Wimedia standard for distributed medium access control (MAC) protocol for ultra wide band (UWB) communications in the wireless personal area network (WPAN). To the best of our knowledge, no technical contributions exist in the open literature at present simulating WUSB and its performance. In this paper, we investigate... View full abstract»

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  • A Robust Anomaly Detection Technique Using Combined Statistical Methods

    Publication Year: 2011, Page(s):101 - 108
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB) | HTML iconHTML

    Parametric anomaly detection is generally a three steps process where, in the first step a model of normal behavior is calibrated and thereafter, the obtained model is used in order to reduce the entropy of the observation. The second step generates an innovation process that is used in the third step to make a decision on the existence or not of an anomaly in the observed data. Under favorable co... View full abstract»

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