Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2007-02-27
2007-02-27
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Spread spectrum
Frequency hopping
Reexamination Certificate
active
09953533
ABSTRACT:
An inquiry message is transmitted successively on each of a first plurality of transmit frequencies (44–48) and thereafter successively on each of a second plurality of transmit frequencies (51), in order to ensure that a first wireless communication apparatus that listens on one of the transmit frequencies will receive the inquiry message. The first plurality of transmit frequencies can also be ensured (25–28) to include a frequency on which a second wireless communication apparatus is listening for the inquiry message. With respect to reception of an inquiry message that is transmitted successively on each of first and thereafter second pluralities of transmit frequencies, after receipt (61) of the initial inquiry message and subsequent expiration of a corresponding backoff period (62), the inquiry message is first listened for on a first frequency of the first plurality of transmit frequencies for a predetermined time (63). If the inquiry message is not received on the first frequency during the first listening operation, the inquiry message is then listened for on a second frequency of the second plurality of transmit frequencies for a predetermined time (64).
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Dabak Anand G.
Schmidl Timothy M.
Bayard Emmanuel
Brady III Wade J.
Neerings Ronald O.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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