Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-05-23
2006-05-23
Ferguson, Keith (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456300, C455S456600, C455S422100, C455S457000, C455S412100, C455S414100
Reexamination Certificate
active
07050815
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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Crouch Simon Edwin
Hawkes Rycharde Jeffery
I'Anson Colin
McDonnell James Thomas Edward
Thomas Andrew
Ferguson Keith
Hewlett--Packard Company
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