Using a signal with increased power for determining the position of a mobile subscriber in a CDMA cellular telephone system
First Claim
1. A method for determining the position of a mobile station within a cellular telephone system having a plurality of base stations, comprising the steps of:
- (A) transmitting a signal at a first power level on a first channel from said mobile station within said cellular telephone system;
(B) temporarily switching said signal from said first channel to a second channel different from said first channel and while said signal is being transmitted on said second channel temporarily increasing a strength of said signal from said first power level to an increased power level and transmitting said signal from said mobile station on said second channel at said increased power level;
(C) while said signal is being temporarily transmitted on said second channel from said mobile station at said increased power level, using said signal being transmitted at said increased power level from said mobile station to make at least a first positional measurement; and
(D) determining said position of said mobile station in accordance with said first positional measurement and other positional measurements.
1 Assignment
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Accused Products
Abstract
A method for determining the position of a mobile station within a cellular telephone system having a plurality of base stations. A signal is transmitted at a low power level from the mobile station. The strength of the signal is then temporarily increased from the low power level to an increased power level, and the signal is temporarily transmitted from the mobile station at this increased power level. While the signal is being temporarily transmitted from the mobile station at the increased power level, the signal is used to make at least a first positional measurement. The position of the mobile station is determined in accordance with the first positional measurement.
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Citations
21 Claims
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1. A method for determining the position of a mobile station within a cellular telephone system having a plurality of base stations, comprising the steps of:
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(A) transmitting a signal at a first power level on a first channel from said mobile station within said cellular telephone system; (B) temporarily switching said signal from said first channel to a second channel different from said first channel and while said signal is being transmitted on said second channel temporarily increasing a strength of said signal from said first power level to an increased power level and transmitting said signal from said mobile station on said second channel at said increased power level; (C) while said signal is being temporarily transmitted on said second channel from said mobile station at said increased power level, using said signal being transmitted at said increased power level from said mobile station to make at least a first positional measurement; and (D) determining said position of said mobile station in accordance with said first positional measurement and other positional measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification