Radio paging system capable of transmitting common information and receiver therefor
First Claim
1. A radio paging system comprising:
- paging terminal means including an encoder for producing, as an output thereof, one of a first code, followed by a string of address codes and message codes, and a second code followed by a string of information codes, said first and second codes being different from each other and positioned at regular time intervals;
a transmitter for transmitting a signal including the output of said encoder; and
a paging receiver for receiving said transmitted signal, and for establishing signal reception synchronization in response to a portion of said transmitted signal including said one of said first and second codes, said receiver comprising;
means for detecting said first code;
means for comparing said address codes with an address code assigned to said receiver;
means for producing an alarm signal and for displaying said message codes in response to the detection of said first code and the detection of coincidence between said address code and said address code assigned to said receiver;
means for detecting said second code; and
means responsive to detection of said second code for effecting the display of said information codes.
1 Assignment
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Accused Products
Abstract
A radio paging system for transmitting address signals and messages, as well as information common to a plurality of receivers, and a receiver applicable to such a system. The radio paging system includes: an encoder which produces a first code, followed by a string of address codes each of which is followed by message codes, and a second code followed by a string of information codes, a transmitter for transmitting a string of codes produced by the encoder; and a receiver which upon detection of the first code produces an alert signal and displays the message codes when the address code agrees with an address code stored in memory, and which, upon detection of the second code, displays the information codes which follow.
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Citations
11 Claims
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1. A radio paging system comprising:
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paging terminal means including an encoder for producing, as an output thereof, one of a first code, followed by a string of address codes and message codes, and a second code followed by a string of information codes, said first and second codes being different from each other and positioned at regular time intervals; a transmitter for transmitting a signal including the output of said encoder; and a paging receiver for receiving said transmitted signal, and for establishing signal reception synchronization in response to a portion of said transmitted signal including said one of said first and second codes, said receiver comprising; means for detecting said first code; means for comparing said address codes with an address code assigned to said receiver; means for producing an alarm signal and for displaying said message codes in response to the detection of said first code and the detection of coincidence between said address code and said address code assigned to said receiver; means for detecting said second code; and means responsive to detection of said second code for effecting the display of said information codes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio paging system comprising:
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paging terminal means including an encoder for producing one of a first synchronizing signal, followed by a string of address signals and message signals, and a second synchronizing signal followed by a string of information signals; a transmitter means for transmitting said signals produced by said encoder; and a receiver means, comprising; means for detecting said first synchronizing signal; means responsive to said detecting means for supplying power to at least a radio section of said receiver only at a predetermined transmission timing; means for detecting said address signal; means for detecting said second synchronizing signal; means responsive to said address signal detecting means for displaying a following message signal; and
responsive to said second synchronizing signal detecting means for displaying a following information signal;said means responsive to said first synchronizing signal detecting means being further responsive to said means for detecting said second synchronizing signal for continuously supplying power to at least said radio section upon detection of said second synchronizing signal, and in the absence of either said first synchronizing signal or said second synchronizing signal, intermittently supplying power to at least said radio section until one of said first synchronizing signal and said second synchronizing signal is detected.
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Specification