Estimating altitude of a communications device
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United States of America Patent
Stats
-
Mar 28, 2006
Grant Date -
Jun 30, 2005
app pub date -
Feb 24, 2004
filing date -
Dec 29, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The altitude of a communications device, which communicates with a communications system via at least one antenna, is estimated. The altitude estimation is based at least on altitude information of said at least one antenna. The altitude estimate of the communications device may be based on a two-dimensional location estimate for the communications device and on information representing three-dimensional location of said at least one antenna of said communication system. The two-dimensional location estimate and the altitude estimate may be sent to the communications device as location assistance information.
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