초록 ▼

An acknowledge back (ack-back) pager is provided for receiving paging signals from a central paging station. The central paging station 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 re

An acknowledge back (ack-back) pager is provided for receiving paging signals from a central paging station. The central paging station 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 dynamically allocated to each of the pagers in the group. Each ack-back pager determines whether the paging signals received thereby exhibits a signal level less than a predetermined threshold level. If the paging signals received by a particular ack-back pager exhibit a signal level less than such predetermined threshold level, then the pager transmits back to the central station at a first output power level. Otherwise, the pager transmits at a second ouput power level substantially less than the first output power level. In this manner, the problem of the ack-back signal from a particular pager being so strong at the central station as to mask other simultaneous ack-back signals is substantially ameliorated.

대표청구항 ▼

An acknowledge back pager having a unique address associated therewith, said pager comprising; receiving means for receiving paging signals from a central station thus producing received paging signals; threshold detecting means, coupled to said receiving means, for determining if the signal level o

An acknowledge back pager having a unique address associated therewith, said pager comprising; receiving means for receiving paging signals from a central station thus producing received paging signals; threshold detecting means, coupled to said receiving means, for determining if the signal level of said received paging signals exceeds a predetermined threshold level, and sub-band transmitting means for transmitting an acknowledge back signal on a selected one of a plurality of M predetermined frequency sub-bands, said transmitting means transmitting being coupled to said threshold detecting means and transmitting acknowledge back signals at a first output power level when said threshold detecting means determines that the signal level of said received paging signals is less than said predetermined threshold level, said transmitting means otherwise transmitting acknowledge back signals at a power level substantially less than said first output power level.