Methods and apparatuses for measuring frequencies of basestations in cellular networks using mobile GPS receivers
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United States of America Patent
Stats
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Aug 30, 2005
Grant Date -
Oct 14, 2004
app pub date -
Jul 2, 2002
filing date -
Apr 15, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
Methods and apparatuses for frequency synchronizing basestations in a cellular communication system. In one aspect of the invention, a method to predict a timing of transmission of a basestation in a cellular communication system includes: receiving a first time tag for a first timing marker in a first cellular signal transmitted from the basestation; receiving a second time tag of a second timing marker in a second cellular signal transmitted from the basestation; and computing a frequency related to the basestation using the first and second time tags. Each of the time tags are determined using at least one satellite positioning system signal received at a mobile station which receives the corresponding time marker.
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