Apparatus and method using an inquiry response for synchronizing to a communication network
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United States of America Patent
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Apr 6, 2004
Grant Date -
N/A
app pub date -
Oct 10, 2000
filing date -
Oct 10, 2000
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Abstract
A method and apparatus for synchronizing with communication traffic in a BLUETOOTH network without joining the network. The apparatus transmits an inquiry signal and receives an inquiry response signal having a coarse system clock time. The apparatus uses the coarse system clock time for estimating an initial channel in a channel hopping sequence then advances channels through the sequence in steps of four or more for scan window time periods of four or more time slot periods until a communication traffic signal is recognized. The time-of-arrival of the traffic signal is used for refining the coarse system clock time in order to acquire the exact system clock time. The exact system clock time is used by the analyzer for deriving the channels and timing of the sequence for synchronizing to subsequent communication traffic signals.
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