1 result where citekey includes Zhang:2007.
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  • @inproceedings{Zhang:2007,
    Abstract = {In this paper, we study traces taken from UMass DieselNet, a sparse mobile wireless DTN network consisting of WiFi nodes attached to buses. As buses travel their routes, they encounter other buses and in some cases are able to establish pair-wise connections and transfer data between them. We analyze these traces to characterize inter-contact behavior among buses, and study the impact on DTN routing performance. We find that the all-bus-pairs aggregated inter-contact times show no discernible pattern. However, the inter-contact times aggregated at a route level exhibit periodic behavior. By analyzing the deterministic inter-meeting times for bus pairs on different route pairs, and then additionally considering variability in bus movement and random failures to establish connections when a pair of buses are in transmission range, we find that these inter-contact times aggregated at a route level can be modeled as mixtures of normal distributions. Based on this analysis, we construct generative models that capture the behavior described above, allowing one to generate synthetic traces of DTN inter-contact times. Using trace-driven simulations of epidemic DTN routing, we find that the epidemic performance predicted by traces generated with this finer-grained route-level model are much closer to the actual performance that would be realized in the operational system than traces generated using the coarse-grained all-bus-pairs aggregated model. This suggests that one must take care in choosing the right level of model granularity when modeling mobility-related measures such as inter-contact times in DTN networks. },
    Acm_Url = {http://doi.acm.org/10.1145/1287853.1287876},
    Author = {Zhang, Xiaolan and Kurose, Jim and Levine, Brian Neil and Towsley, Don and Zhang, Honggang},
    Booktitle = {Proc. ACM Intl. Conf. on Mobile Computing and Networking (Mobicom)},
    Keywords = {DTN; routing; wireless;DOME},
    Month = {September},
    Pages = {195--206},
    Slides_Url = {http://forensics.umass.edu/pubs/slides/zhang.mobicom.2007.ppt.pdf},
    Sponsors = {CNS-0519881, ANI-0325868, and W911NF-06-3-0001},
    Title = {{Study of a Bus-Based Disruption Tolerant Network: Mobility Modeling and Impact on Routing}},
    Traces_Url = {brian.php/Network},
    Url = {http://forensics.umass.edu/pubs/zhang.mobicom.2007.pdf},
    Year = {2007},
    Bdsk-Url-1 = {http://forensics.umass.edu/pubs/zhang.mobicom.2007.pdf}}

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