Selective paging system and paging receiver therefor
First Claim
1. A paging system which comprises:
- a base station including means for transmitting a signal having a plurality of transmission frames and including a calling signal and a message signal; and
a plurality of paging receives, each of said paging receivers includes means for receiving a calling signal from said base station, means for receiving a message signal next to a calling signal assigned to such paging receiver, and means for displaying said received message signal, said paging receivers being divided into groups, each of the groups being assigned with a specific one of said plurality of transmission frames;
wherein said calling signal transmitting means of the base station includes means for transmitting an individual calling signal for individually calling one of said plurality of paging receivers by using the one specific transmission frame assigned to a group to which said one paging receiver belongs, and transmitting a simultaneous calling signal for simultaneously calling at least two of said plurality of paging receivers which belong to at least two of the groups by using a predetermined on e of said plurality of transmission frames; and
wherein the receiving means of each of said plurality of paging receivers receives the individual and simultaneous calling signals for only the duration of said specific frame assigned to said paging receiver and the duration of said predetermined frame.
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Accused Products
Abstract
Each pager includes a receiver for receiving a transmission signal including an address and a message from a base station, a frame register for holding the number of transmission frame assigned to the pager, a common frame register for holding the number of a transmission frame commonly used by a plurality of pagers assigned with a transmission frame different from the transmission frame assigned to the pager, address registers for holding a specific address number of the pager and an address number common to a plurality of pagers and a controller. The a controller switches on the receiver in a predetermined period including a plurality of frames stored in the frame register, comparators for comparing the address of the signal received by the receiver with the addresses stored in the address registers. A message decoder fetches a message when the comparator detects a coincidence.
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Citations
13 Claims
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1. A paging system which comprises:
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a base station including means for transmitting a signal having a plurality of transmission frames and including a calling signal and a message signal; and a plurality of paging receives, each of said paging receivers includes means for receiving a calling signal from said base station, means for receiving a message signal next to a calling signal assigned to such paging receiver, and means for displaying said received message signal, said paging receivers being divided into groups, each of the groups being assigned with a specific one of said plurality of transmission frames; wherein said calling signal transmitting means of the base station includes means for transmitting an individual calling signal for individually calling one of said plurality of paging receivers by using the one specific transmission frame assigned to a group to which said one paging receiver belongs, and transmitting a simultaneous calling signal for simultaneously calling at least two of said plurality of paging receivers which belong to at least two of the groups by using a predetermined on e of said plurality of transmission frames; and wherein the receiving means of each of said plurality of paging receivers receives the individual and simultaneous calling signals for only the duration of said specific frame assigned to said paging receiver and the duration of said predetermined frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A pager for receiving an address signal and a message signal transmitted from a base station, said pager comprising:
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frame register means for storing a position number of one of a plurality of transmission frames which is assigned to the pager, and also a position number of a common transmission frame common to the pager and others of said plurality of pagers; address memory means for storing pager address data corresponding to the position number of the transmission frame which is stored in said frame register means, and also common address data corresponding to the one pager and said other pagers; receiving means for receiving the address signal transmitted from the base station, only for the duration of the one transmission frame the position number of which is stored in said frame register means and for the duration of the common transmission frame that position number of which is stored in said frame register means; message signal memory means for storing a message signal transmitted from the base station after the address signal received by said receiving means, when the received address signal is identical to the pager address data or the common address data stored in said address memory means; and display means for displaying the message signal stored in said message signal memory means. - View Dependent Claims (12, 13)
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Specification