EP0234201A2
Expired / Lapsed
EP
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Paging receiver having battery saving circuit
Assignee: NEC Corp
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Filing: 1987-01-09
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Granted: —
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Expires: 2007-01-09
Abstract
Abstract The invention relates to a paging receiver comprising a rereceiving section for receiving a paging signal which includes a preamble signal, a sychronization codeword and an address codeword, switch means (16) for controlling power supply to said receiving section in response to a control signal, means (32) for detecting the preamble signal to produce a preamble detect pulse (PD), means (33) for detecting said synchronization codeword to produce a synchronization codeword detect pulse (SCD), means (34) for detecting said address codeword to produce an address codeword detect pulse (IDD), error detector means (35) for detecting an error in said address codeword and producing an error detect pulse (NBD) when the number of errors detected is greater than a predetermined value, and a controller (36) for generating said control signal and applying said generated control signal to said switch means. The paging receiver is operable with an improved battery saving efficiency during reception of the paging signal.
Inventors
- 👤 Toshifumi Nec Corporation Sato
- 👤 Takashi Nec Corporation Oyagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 11:31
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0225; H04W52/0229; H04W52/0261; H04W52/0274; H04W52/028; H04W52/0283; H04W88/00; H04W88/02; H04W88/022; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
205 words
A paging receiver comprising: a receiving section for receiving a paging signal which includes a preamble signal, a synchronization codeword and an address codeword; switch means for controlling power supply to said receiving section in response to a control signal; means for detecting the preamble signal to produce a preamble detect pulse; means for detecting said synchronization codeword to produce a synchronization codeword detect pulse; means for detecting said address codeword to produce an address codeword detect pulse; error detector means for detecting an error in said address codeword and producing an error detect pulse when the number of errors detected is greater than a predetermined value; and a controller for, in a waiting mode, generating said control signal intermittently at a predetermined interval, generating said control signal continuously for a predetermined duration when received said preamble detect pulse during the intermittent generation of said control signal, generating said control signal at a predetermined timing when received said synchronization codeword detect pulse during the continuous generation of said control signal, generating said control signal at said predetermined interval when received said error detect pulse during the generation of said control signal at said predetermined timing, and applying the generated control signal to said switch means.
Claim 2
Dependent Claim
205 words
A paging receiver comprising: a receiving section for receiving a paging signal which includes a preamble signal, a synchronization codeword and an address codeword; switch means for controlling power supply to said receiving section in response to a control signal; means for detecting the preamble signal to produce a preamble detect pulse; means for detecting said synchronization codeword to produce a synchronization codeword detect pulse; means for detecting said address codeword to produce an address codeword detect pulse; error detector means for detecting an error in said address codeword and producing an error detect pulse when the number of errors detected is greater than a predetermined value; and a controller for, in a waiting mode, generating said control signal intermittently at a predetermined interval, generating said control signal continuously for a predetermined duration when received said preamble detect pulse during the intermittent generation of said control signal, generating said control signal at a predetermined timing when received said synchronization codeword detect pulse during the continuous generation of said control signal, generating said control signal at said predetermined interval when received said error detect pulse during the generation of said control signal at said predetermined timing, and applying the generated control signal to said switch means.
Claim 3
Dependent Claim
49 words
A paging receiver as claimed in claim l, wherein said controller generates said control signal continuously for the predetermined period of time when received said preamble detect signal during the generation of said control signal at said predetermined timing, and applies the generated control signal to said switch means.
Claim 4
Dependent Claim
39 words
A paging receiver as claimed in claim 2, wherein said address codeword is transmitted in one of a predetermined number of frames, said predetermined timing including a timing of said one frame in which said address codeword is transmitted.
Claim 5
Dependent Claim
26 words
A paging receiver as claimed in claims l to 3, further comprising means for generating an alert signal in response to said address codeword detect pulse.
Claim 6
Independent Claim
113 words
A method of saving a battery of a paging receiver, comprising the steps of: supplying power to a predetermined section of said receiver in response to a control signal; generating said control signal intermittently while said receiver is waiting for a paging signal; generating said control signal at a predetermined timing when a synchronization codeword in said paging signal is detected; and detecting an error in an address codeword which is contained in said paging signal while said control signal is generated at said predetermined timing, and, when the number of errors is greater than a predetermined value, replacing the generation of said control signal at said predetermined timing with the intermittent generation.
Claim 7
Independent Claim
113 words
A method of saving a battery of a paging receiver, comprising the steps of: supplying power to a predetermined section of said receiver in response to a control signal; generating said control signal intermittently while said receiver is waiting for a paging signal; generating said control signal at a predetermined timing when a synchronization codeword in said paging signal is detected; and detecting an error in an address codeword which is contained in said paging signal while said control signal is generated at said predetermined timing, and, when the number of errors is greater than a predetermined value, replacing the generation of said control signal at said predetermined timing with the intermittent generation.
Claim 8
Dependent Claim
72 words
A method as claimed in claim 5, further comprising the steps of: generating said control signal continuously for a predetermined duration when a preamble signal in said paging signal is detected; detecting said synchronization codeword while said control signal is generated continuously for said predetermined duration; and generating said control signal continously during said predetermined duration when said preamble signal is detected while said control signal is generated at said predetermined timing.
Claim 9
Dependent Claim
64 words
A paging receiver having a battery saving circuit and constructed to receive and process a paging signal, said paging receiver comprising sync monitor means which includes error detector means for detecting an error in an address codeword contained in said paging signal and control means for controlling said battery saving circuit in response to an error detect signal outputted by said error detector means.
Claim 10
Dependent Claim
64 words
A paging receiver having a battery saving circuit and constructed to receive and process a paging signal, said paging receiver comprising sync monitor means which includes error detector means for detecting an error in an address codeword contained in said paging signal and control means for controlling said battery saving circuit in response to an error detect signal outputted by said error detector means.
Claim 11
Dependent Claim
114 words
A paging receiver having a battery saving circuit and constructed to receive and process a paging signal, said paging receiver comprising sync monitor means which includes: means for detecting a preamble signal contained in said paging signal; error detector means for detecting an error in an address codeword which is contained in said paging signal; and control means for outputting a signal for controlling said battery saving circuit in response to an error detect signal which is outputted by said error detector means, and outputting a signal for enabling a synchronization codeword detecting section in response to said error detect signal and a preamble detect signal which is outputted by said preamble detect means.
Claim 12
Dependent Claim
114 words
A paging receiver having a battery saving circuit and constructed to receive and process a paging signal, said paging receiver comprising sync monitor means which includes: means for detecting a preamble signal contained in said paging signal; error detector means for detecting an error in an address codeword which is contained in said paging signal; and control means for outputting a signal for controlling said battery saving circuit in response to an error detect signal which is outputted by said error detector means, and outputting a signal for enabling a synchronization codeword detecting section in response to said error detect signal and a preamble detect signal which is outputted by said preamble detect means.
References Cited (Backward Citations)
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