Deriving location information about a communicating entity
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United States of America Patent
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-
May 23, 2006
Grant Date -
Nov 15, 2001
app pub date -
Mar 29, 2001
filing date -
Apr 6, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
Location information about a communicating entity (41), in particular a mobile entity, is derived by identifying intermediate nodes (42) along the communication path being used by the entity, and then looking up, in a database (44), the geographic significance of at least one of these nodes when considered in a direction along the communication path towards the entity of interest. Preferably, account is taken of any identified downstream/upstream nodes to refine the geographic significance of a node. The geographic significance information can be compiled by taking location fixes at a plurality of endpoint locations and associating the location data thus obtained with the intermediate nodes traversed when communication is effected from the corresponding endpoint locations.
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