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UID:382@lincs.fr
DTSTART;TZID=Europe/Paris:20180404T140000
DTEND;TZID=Europe/Paris:20180404T140000
DTSTAMP:20180405T073941Z
URL:https://www.lincs.fr/events/tba-5/
SUMMARY:Vehicular networks in hyperfractal setup
DESCRIPTION:Confinement of human settlement in areas limited in size is the
 foundation of the long-standing Central Place Theory which assumes the
 existence of regular spatial patterns in regional human organization. For
 example\, a department has rural areas\, with low density of population\,
 and urban areas\, with high density of population\, namely cities and
 towns. Similarly\, cities reflect a statistical self-similarity or
 hierarchy of clusters. Towns are split in neighborhoods\; each neighborhood
 is organized in quarters then blocks separated by streets. Blocks are made
 of buildings that are themselves split in apartments and so on. Vehicles
 and devices are deployed where human activities occur and therefore inherit
 the self-similarity of the environment where they are deployed.\nThis talk
 will present our macro level model for the topology of vehicular
 communication entities in cities by exploiting self-similarity. The model
 is called hyperfractal and presents two variations: the hyperfractal model
 for density of vehicles and the hyperfractal model for road-side units
 (RSU). The model exploits the self-similarity of the density map of the
 vehicular communications entities and avoids the extremes of regularity and
 randomness.\n Furthermore\, we introduce a method for computing the
 hyperfractal dimension on cities. Using this fitting procedure applied to
 open data sets\, we prove the validity of the model and show how it can be
 extended to cities that do not follow a regular hierarchical
 pattern.\nNext\, we study the information propagation speed of a broadcast
 in an urban delay tolerant network which is disconnected at all time\,
 i.e.\, where end-to-end multihop paths may not exist (requiring a
 store-carry-and-forward routing model). We prove bounds on the average
 broadcast time in a hyperfractal setup and show that the performance is due
 in part to an interesting self-similar phenomenon\, that we denote as
 information teleportation\, that arises as a consequence of the topology
 and allows an acceleration of the broadcast time.
CATEGORIES:Seminars,Youtube
LOCATION:LINCS Seminars room\, 23\, avenue d'Italie\, Paris\, 75013\,
 France
GEO:48.828400;2.356897
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 room:geo:48.828400,2.356897
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TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
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DTSTART:20180325T030000
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