Circuit and method for controlling a timing of intermittent reception in radio equipment
First Claim
1. A circuit for controlling intermittent reception of radio equipment having receiving means for receiving a radio signal, said circuit comprising:
- controlling means for performing ON/OFF control for said receiving means;
outputting means for outputting a plurality of ON/OFF times during which said receiving means is turned on and/or off which are related to the ON/OFF control for said receiving means; and
setting means for setting to said controlling means an ON/OFF time having a shorter ON time among a plurality of said ON/OFF times for said receiving means stored in a memory when said receiving means cannot receive a predetermined signal included in said radio signal, andsaid setting means including initial setting means for setting, in response to turning-on of a power supply to said controlling means an ON time for said receiving means which is longer than a cycle in which said predetermined signal is repeatedly transmitted from a plurality of said ON/OFF times for said receiving means stored in said memory.
2 Assignments
0 Petitions
Accused Products
Abstract
In a radio equipment which establishes synchronism with a radio signal by detecting a synchronizing signal included in the radio signal and performs intermittent reception of the radio signal until the synchronizing signal is detected, an ON time for a radio section is set longer than a transmission cycle of the synchronizing signal when the radio equipment is provided at a position where reception of the radio signal is possible. On the other hand, when the radio equipment is provided at a position where reception of the radio signal is impossible, the ON time for the radio section is set shorter. After setting the ON time for the radio section shorter, the ON time for the radio section is further set shorter if the radio equipment is still provided at a position where reception of the radio signal is impossible.
65 Citations
18 Claims
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1. A circuit for controlling intermittent reception of radio equipment having receiving means for receiving a radio signal, said circuit comprising:
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controlling means for performing ON/OFF control for said receiving means; outputting means for outputting a plurality of ON/OFF times during which said receiving means is turned on and/or off which are related to the ON/OFF control for said receiving means; and setting means for setting to said controlling means an ON/OFF time having a shorter ON time among a plurality of said ON/OFF times for said receiving means stored in a memory when said receiving means cannot receive a predetermined signal included in said radio signal, and said setting means including initial setting means for setting, in response to turning-on of a power supply to said controlling means an ON time for said receiving means which is longer than a cycle in which said predetermined signal is repeatedly transmitted from a plurality of said ON/OFF times for said receiving means stored in said memory. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio selective-calling receiver comprising:
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radio means for outputting a demodulation signal after demodulating a radio signal; synchronizing signal detecting means for detecting a synchronizing signal from said demodulation signal; detecting means for detecting a predetermined call number from said demodulation signal; call annunciating means for performing call annunciation in the case where said predetermined call number is detected; and controlling means which selects an ON/OFF time for said radio means having a shorter ON time than that in the case where reception of said synchronizing signal is disabled when said radio means is turned on and then performs ON/OFF control to said radio means and said controlling means including initial controlling means which selects an ON time for said radio means which is longer than a cycle in which predetermined signal is repeatedly transmitted from a plurality of the ON/OFF times for said radio means stored in said ON/OFF time memory and performs ON/OFF control to said radio means in response to turning-on of a power supply. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for controlling intermittent reception in a radio receiver, comprising the steps of:
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initializing said radio receiver with an ON time that is longer than a cycle in which a predetermined signal is repeatedly transmitted; demodulating a radio signal; detecting said predetermined signal from said demodulation signal; setting said ON time for said radio receiver during which said radio signal is amplified and demodulated to be shorter in the case where said predetermined signal is not detected; and setting said radio receiver into one of a plurality of different, sequential modes as said predetermined signal continues not to be received, such that a mode of said plurality of modes has a shorter ON time of said radio receiver than a subsequent mode of said plurality of modes. - View Dependent Claims (18)
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Specification