Method and system for position determination using video dial tone
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United States of America Patent
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Jun 16, 1998
Issued Date -
N/A
app pub date -
Mar 15, 1996
filing date -
Sep 28, 1994
priority date (Note) -
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Abstract
A method for determining and reporting the position of a mobile unit to a third party via a video dial tone (VDT) network is described. The method is directed for use in a wireless communication system having at least one registration area including at least one control unit and at least one base station having a corresponding coverage area. For each of the base stations in a registration area, a plurality of analog and/or TDMA RF measurements are determined, including its link budget, for a predetermined plurality of distances and directions. These measurements are modeled as scaled contoured shapes having minimum and maximum boundaries which are used to define a bounding polygon area to describe the position of a mobile station in terms of minimum and maximum error estimate. The video dial tone network includes an interactive video delivery system, a set top terminal and a video monitor.
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