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Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks and Workshops, 2008. WiOPT 2008. 6th International Symposium on

Date 1-3 April 2008

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Displaying Results 1 - 25 of 149
  • Proceedings of the 6th intl. symposium on modeling and optimization Wiopt 2008

    Publication Year: 2008, Page(s): i
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  • WiOpt 2008 — Message from the general chairs

    Publication Year: 2008, Page(s): ii
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  • [Copyright notice]

    Publication Year: 2008
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  • Steering Committee

    Publication Year: 2008, Page(s): iv
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  • Organizing Committee

    Publication Year: 2008, Page(s): v
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  • Technical Program Committee

    Publication Year: 2008, Page(s): vi
    IEEE is not the copyright holder of this material | PDF file iconPDF (333 KB)
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  • Table of contents

    Publication Year: 2008, Page(s):vii - xiv
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  • Wiopt 2008 Paper track — Session 1

    Publication Year: 2008, Page(s): 1
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  • Programmable active emulation of wireless systems — A DVB-RCS example

    Publication Year: 2008, Page(s):2 - 7
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (422 KB) | HTML iconHTML

    This paper presents a DVB-RCS satellite emulation system built using the NPBox programmable network emulation system. NPBox allows system components to be modeled both at a higher abstraction level using a finite-state-machine like abstraction, and also at a lower level using customized event guards and actions. Comparison experiments show that the emulated performance is similar to that of a comp... View full abstract»

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  • An experimental investigation of VoIP and video streaming over fixed WiMAX

    Publication Year: 2008, Page(s):8 - 15
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB) | HTML iconHTML

    Despite the significant interest in WiMAX technology and deployment, there are very few publicly reported measurements from testbeds and field trials. As such, most WiMAX studies employ simulation and modeling. This paper contributes to our understanding of what is realistically possible using off-the-shelf fixed WiMAX equipment today. We employ multiple competing traffic sources over a point-to-m... View full abstract»

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  • Effect of 802.11 adaptive exponential backoffs on the fluidity of downlink flows in mesh networks

    Publication Year: 2008, Page(s):16 - 22
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (481 KB) | HTML iconHTML

    Efficient multihop traffic management is a need for successful Wireless Mesh Networks (WMNs) deployment. Using an analogy with fluid mechanism, we classify a flow as laminar if the packets flow smoothly from the Wired Access Point (WAP) over the mesh network, and as turbulent otherwise. We identify a particular but frequent collision scenario, which sets the flow to be turbulent, resulting in a st... View full abstract»

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  • Wiopt 2008 Paper track - Session 2

    Publication Year: 2008, Page(s): 23
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  • The effect of using directional antennas on adjacent channel interference in 802.11a: Modeling and experience with an outdoors testbed

    Publication Year: 2008, Page(s):24 - 29
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (878 KB) | HTML iconHTML

    We present an outdoors 802.11a testbed based on off-the-shelf components that we used for multi-radio node experimentation. This is the first such testbed, to our knowledge, equipped with directional antennas. With it we conducted a thorough and systematic set of measurements, in medium range outdoors links, to examine how the physical separation of the antennas, the output power of the interfaces... View full abstract»

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  • Collecting broken frames: Error statistics in IEEE 802.11b/g links

    Publication Year: 2008, Page(s):30 - 35
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB) | HTML iconHTML

    We present a measurement method that allows to capture the complete set of all PSDU (PLCP Service Data Unit) transmissions and receptions in live IEEE 802.11b/g links with very high timing resolution. This tool provides an in-depth view of the statistics of frame-losses as it makes it possible to distinguish between different loss types such as complete miss, partial corruption and physical-layer ... View full abstract»

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  • Energy and link measurements for mobile phones using IEEE802.11b/g

    Publication Year: 2008, Page(s): 36
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (65 KB)

    The document that should appear here is not currently available. View full abstract»

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  • Wiopt 2008 Paper track - Session 3

    Publication Year: 2008, Page(s): 36a
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  • Analysis and detection of bottlenecks via TCP footprints in live 3G networks

    Publication Year: 2008, Page(s):37 - 42
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (270 KB) | HTML iconHTML

    In this paper we evaluate four different metrics for non intrusive bottleneck detection based on TCP counters. This work is based on the full TCP statistics recorded on five days spread over the last one and a half year within the core network of a mobile network operator in Austria. Scatterplots, so called ldquofootprintsrdquo, were generated counting the number of packets and the number of retra... View full abstract»

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  • Spurious TCP timeouts in 802.11 networks

    Publication Year: 2008, Page(s):43 - 49
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1886 KB) | HTML iconHTML

    In this paper, we investigate spurious TCP timeouts in 802.11 wireless networks. Though timeouts can be a problem for uploads from an 802.11 network, these timeouts are not spurious but are caused by a bottleneck at the access point. Once this bottleneck is removed, we find that spurious timeouts are rare, even in the face of large changes in numbers of active stations or PHY rate. View full abstract»

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  • Wiopt 2008 The worst-case capacity of wireless networks - Roger Wattenhofer (ETHZ)

    Publication Year: 2008, Page(s): 50
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  • Wiopt 2008 Paper track - Session 1

    Publication Year: 2008, Page(s): 51
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  • Node Interaction in 802.11 based networks with boolean interference

    Publication Year: 2008, Page(s):52 - 57
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (154 KB) | HTML iconHTML

    Wireless local area networks (WLANs) have been extensively studied over the past several years. So far, research has primarily focussed on scenarios where all nodes in the network can hear each other. The present paper discusses interaction between nodes in a more complex setting, where nodes may only hear parts of the network. The analysis relies on a Markov process that keeps track of the activi... View full abstract»

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  • Efficient quantization for feedback controlled networks with type II hybrid ARQ

    Publication Year: 2008, Page(s):58 - 63
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (350 KB) | HTML iconHTML

    This paper addresses feedback design issues in ad hoc networks with simultaneous access of multiple users, when type II HARQ exploits a constrained capacity reverse channel. In such networks, communications performance is limited by interference and nodes operate in a distributed fashion; thus, efficient resource allocation relies on proper feedback signaling, which on the other hand can use only ... View full abstract»

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  • Wiopt 2008 Paper track - Session 2

    Publication Year: 2008, Page(s): 64
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  • A closed power allocation solution for outage restricted distributed MIMO multi-hop networks

    Publication Year: 2008, Page(s):65 - 70
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB) | HTML iconHTML

    Power consumption and Quality-of-Service are the critical factors when developing resource allocation strategies for wireless networks. In order to minimize total transmission power while meeting the end-to-end outage probability requirement in a distributed MIMO multi-hop network, we will formulate the power allocation task as a convex optimization problem. By using some approximations to the opt... View full abstract»

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  • QoS provisioning in wireless data networks under non-continuously backlogged users

    Publication Year: 2008, Page(s):71 - 76
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (495 KB) | HTML iconHTML

    This paper addresses the problem of efficient resource allocation in CDMA wireless networks, supporting non-real-time services with various long-term QoS requirements, by exploiting the advantages of opportunistic scheduling. Most of the existing work covers the analysis of the system under the assumption of infinite backlogs. In this paper, we remove this assumption and analyze the behavior of th... View full abstract»

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