Paging method and apparatus
First Claim
1. A control station which communicates with a two-way paging unit, the control station comprising:
- a clock unit which generates at least a first clocking signal;
a first receiver which receives a station switch request signal from the paging unit, the station switch request signal including a frame of information comprising a plurality of time divided slots related to the first clocking signal, one of the plurality of time slots as selected by the paging unit bearing information serving to at least temporarily associate with the paging unit with the selected time slot;
a processor which prepares a paging unit transmit authorization signal, the paging unit transmit authorization signal including a frame of information comprising a same plurality of time divided slots as the station switch request signal and information in a same selected one of the time slots as in the station switch request signal;
a transmitter for transmitting the paging unit transmit authorization signal.
2 Assignments
0 Petitions
Accused Products
Abstract
A two-way paging system utilizes four local frequencies for transmissions between pager units (22) and a central control station (20). A first local frequency (f1) carries a local clock; a second local frequency (f2) carries communications packets from the central control station to paging units; a third local frequency (f3) carries communication packets from the pager units to the central control station; and a fourth local frequency (f4) carries a status or request signal from the paging units (22) to the central control station (20). Transmissions on the fourth local frequency (f4) are in accordance with a time divided slot allocation among pager units accessing the central control station (20). For a two-way paging system having a plurality of central control stations (420x) servicing a corresponding plurality of cells, a total of eight frequencies are utilized within any one cell. Four of the utilized frequencies are the local frequencies (f1 -f4) which may differ from cell to cell!, and four of the utilized frequencies are lower power common frequencies or switching frequencies (C1 -C4) which are used to switch or hand-off a pager unit (422) traveling from one cell to another.
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Citations
6 Claims
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1. A control station which communicates with a two-way paging unit, the control station comprising:
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a clock unit which generates at least a first clocking signal; a first receiver which receives a station switch request signal from the paging unit, the station switch request signal including a frame of information comprising a plurality of time divided slots related to the first clocking signal, one of the plurality of time slots as selected by the paging unit bearing information serving to at least temporarily associate with the paging unit with the selected time slot; a processor which prepares a paging unit transmit authorization signal, the paging unit transmit authorization signal including a frame of information comprising a same plurality of time divided slots as the station switch request signal and information in a same selected one of the time slots as in the station switch request signal; a transmitter for transmitting the paging unit transmit authorization signal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification