Method and apparatus for locating and tracking cellular telephones in a CDMA cellular communication network
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 1, 2000
Grant Date -
N/A
app pub date -
Oct 10, 1997
filing date -
Oct 10, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system and method for initially locating and subsequently tracking the location of one or more mobile phones in a cellular communication network are disclosed. Software for implementing a scheduling and tracking system ('STS') is incorporated into the base station controller ('BSC') of a cellular communication network for performing scheduling and tracking functions with respect to mobile phone location. In one aspect of the invention, time difference of arrival ('TDOA') techniques are used to determine a location of each of a number of designated mobile phones active in the network. In another aspect of the invention, a scheduling portion of the STS originates and maintains a schedule of time measurement updates with reference to the previous location of the mobile phone. In yet another aspect of the invention, a tracking portion of the STS keeps track of the location of each of the designated mobile phones over time.
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