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John Whitbeck

  1. Push-and-Track: Saving Infrastructure Bandwidth Through Opportunistic Forwarding.

    Mon, 01/23/2012 - 15:01 — SomNambul
    Authors: John Whitbeck, Vania Conan, Marcelo Dias de Amorim, Yoann Lopez, Jeremie Leguay
    Subjects: Networking and Internet Architecture
    Abstract

    Major wireless operators are nowadays facing network capacity issues in
    striving to meet the growing demands of mobile users. At the same time,
    3G-enabled devices increasingly benefit from ad hoc radio connectivity (e.g.,
    Wi-Fi). In this context of hybrid connectivity, we propose Push-and-track, a
    content dissemina- tion framework that harnesses ad hoc communication
    opportunities to minimize the load on the wireless infrastructure while
    guaranteeing tight delivery delays.

  2. HYMAD: Hybrid DTN-MANET Routing for Dense and Highly Dynamic Wireless Networks.

    Fri, 06/18/2010 - 15:01 — SomNambul
    Authors: John Whitbeck, Vania Conan
    Subjects: Networking and Internet Architecture
    Abstract

    Delay/Disruption-Tolerant Network (DTN) protocols typically address sparse
    intermittently connected networks whereas Mobile Ad-hoc Network (MANET)
    protocols address the fairly stable and fully connected ones. But many
    intermediate situations may occur on mobility dynamics or radio link
    instability. In such cases, where the network frequently splits into evolving
    connected groups, none of the conventional routing paradigms (DTN or MANET) are
    fully satisfactory.

  3. Plausible Mobility: Inferring Movement from Contacts.

    Fri, 01/22/2010 - 16:01 — SomNambul
    Authors: John Whitbeck, Vania Conan, Marcelo Dias de Amorim
    Subjects: Networking and Internet Architecture
    Abstract

    We address the difficult question of inferring plausible node mobility based
    only on information from wireless contact traces. Working with mobility
    information allows richer protocol simulations, particularly in dense networks,
    but requires complex set-ups to measure, whereas contact information is easier
    to measure but only allows for simplistic simulation models. In a contact trace
    a lot of node movement information is irretrievably lost so the original
    positions and velocities are in general out of reach.

  4. Tuning Message Size in Opportunistic Mobile Networks.

    Thu, 01/21/2010 - 16:01 — SomNambul
    Authors: John Whitbeck, Vania Conan, Marcelo Dias de Amorim
    Subjects: Networking and Internet Architecture
    Abstract

    We describe a new model for studying intermittently connected mobile
    networks, based on Markovian random temporal graphs, that captures the
    influence of message size, maximum tolerated delay and link stability on the
    delivery ratio.

  5. HYMAD: Hybrid DTN-MANET Routing for Dense and Highly Dynamic Wireless Networks.

    Thu, 01/21/2010 - 16:01 — SomNambul
    Authors: John Whitbeck, Vania Conan
    Subjects: Networking and Internet Architecture
    Abstract

    In this paper we propose HYMAD, a Hybrid DTN-MANET routing protocol which
    uses DTN between disjoint groups of nodes while using MANET routing within
    these groups. HYMAD is fully decentralized and only makes use of topological
    information exchanges between the nodes. We evaluate the scheme in simulation
    by replaying real life traces which exhibit this highly dynamic connectivity.
    The results show that HYMAD outperforms the multi-copy Spray-and-Wait DTN
    routing protocol it extends, both in terms of delivery ratio and delay, for any
    number of message copies.

  6. Dimensionnement des messages dans un reseau mobile opportuniste.

    Thu, 01/21/2010 - 16:01 — SomNambul
    Authors: John Whitbeck, Vania Conan, Marcelo Dias de Amorim
    Subjects: Networking and Internet Architecture
    Abstract

    Understanding transport capacity in intermittently connected mobile networks
    (ICMN) is crucial since different applications have different interactivity and
    bandwidth requirements. One practical issue is how to transform an
    application's messages into packets suitable for transport over an ICMN. In
    this paper, we propose a new Markovian model for random temporal graphs and
    show, both analytically and by replaying a real life trace obtained in a
    rollerblading tour, that the size of the messages sent over an ICMN has a
    decisive impact on their delivery ratio.

  7. Intermittently-Connected Mobile Networks as Markovian Random Temporal Graphs.

    Mon, 09/14/2009 - 09:02 — SomNambul
    Authors: John Whitbeck, Vania Conan, Marcelo Dias de Amorim
    Subjects: Networking and Internet Architecture
    Abstract

    We model intermittently-connected mobile networks (ICMN) in terms of
    Markovian random temporal graphs. Using this new model, we examine, both
    analytically and by replaying a real-life trace obtained in a rollerblading
    tour, the interactions between node mobility, maximum tolerated delay, and
    bundle size.

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