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| creator |
Dudkowski, Dominique
| | date |
2002-02-01
| | | | description |
152 pages
| |
Spatial- and location-aware computing has evolved to be one of the
most thrilling topics in today's research of information
science. In the context of the Nexus Platform, a global
infrastructure is being developped to support applications based on
the location of objects of the real world and the spatial
relationship between them.
One part of the Nexus project deals with the development of an Event
Service which manages location-related events that can occur, for
example a person entering a building or a tourist being in the
vicinity of a budget hotel. For the management of these events,
event sources are required, which are the place where events
originally become visible.
One such event source will be the Nexus Location Service which
stores highly dynamic location information of mobile objects. This
thesis will show how the functionality of an event source can be
integrated into the Nexus Location Service. We will define a set of
events suitable for observing changes specific to mobile objects and
their location, and which can be used to construct more complex
events in the Event Service.
By very detailed analysis of the underlying geometric properties of
the event mechanism we will tackle the task of event observation.
Based on these results, we will explore the area of index structures
and make decisions to find an appropriate storage model for
location-related events. We will show by examining a prototype
implementation that makes use of the chosen index structures how the
event mechanism will perform, and that it fulfills the requirements
for being used as an event source for the Nexus Event Service.
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