Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-03-08
2005-03-08
Trost, William (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S404200, C455S456200, C455S456300, C455S456500, C455S456600, C342S464000
Reexamination Certificate
active
06865395
ABSTRACT:
Techniques to estimate the position of a wireless terminal. In a method, the identities of a number of transmitters (e.g., BTSs) to be used to estimate the position are initially received. Expected areas for these transmitters are then determined. The expected area associated with each transmitter is indicative of an area where the terminal is likely to be located given that the signal from the transmitter is received by the terminal. Each expected area may comprise a location (e.g., the expected area center) to be used as an estimated position of the terminal and an uncertainty (or error estimate) associated with that estimated position. The expected areas for the transmitters are then combined (e.g., based on a weighted average) to determine a combined expected area, which is then provided as the estimate of the position of the terminal.
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Brown Charles D
Kordich Donald
Qualcomm Inc.
Trost William
Wadsworth Philip R.
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