Knowledge back pager with frequency control apparatus
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United States of America Patent
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-
Apr 18, 1989
Grant Date -
N/A
app pub date -
Jan 7, 1988
filing date -
Jan 7, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An acknowledge back (ack-back) pager is provide for use in a paging system which includes a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back data on different frequency sub-bands, a different frequency sub-band being allocated to each of the pagers in the group. The invention provides apparatus for controlling the frequency of the selected sub-band with very high accuracy.
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