Power conservation method and apparatus for a portion of a predetermined signal
First Claim
1. A method for conserving power within a receiver which receives a transmitted signal having a predetermined signal inserted periodically at predetermined time intervals for synchronizing the receiver, the predetermined signal having at least a first portion including a first predefined signal, and a second portion including a second predefined signal, said method comprising the steps of:
- (a) receiving and detecting a first predetermined signal to obtain synchronization of the receiver with the transmitted signal;
(b) thereafter receiving and detecting at least the first portion of each subsequently transmitted predetermined signal to maintain synchronization with the transmitted signal; and
(c) conserving power during the second portion of each subsequently transmitted predetermined signal following the detection of the first portion of each subsequently transmitted predetermined signal.
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Accused Products
Abstract
A receiver receives a transmitted signal having a periodic predetermined signal, a method and apparatus detects a first predetermined signal. Power may be conserved during a portion of a subsequent predetermined signal. The subsequent predetermined signal is divided into at least a first and second portion. If the first portion is detected, the subsequent predetermined signal is considered detected and power is conserved for the second portion. If the first portion is not detected, the receiver remains active for the second portion in order to detect the subsequent predetermined signal.
146 Citations
24 Claims
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1. A method for conserving power within a receiver which receives a transmitted signal having a predetermined signal inserted periodically at predetermined time intervals for synchronizing the receiver, the predetermined signal having at least a first portion including a first predefined signal, and a second portion including a second predefined signal, said method comprising the steps of:
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(a) receiving and detecting a first predetermined signal to obtain synchronization of the receiver with the transmitted signal; (b) thereafter receiving and detecting at least the first portion of each subsequently transmitted predetermined signal to maintain synchronization with the transmitted signal; and (c) conserving power during the second portion of each subsequently transmitted predetermined signal following the detection of the first portion of each subsequently transmitted predetermined signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A receiver comprising:
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receiving means for receiving a transmitted signal having a predetermined signal inserted periodically at predetermined time intervals for synchronizing the receiver, the predetermined signal having at least a first portion including a first predefined signal and a second portion including a second predefined signal; synchronization means responsive to a first predetermined signal, for synchronizing the receiver with the transmitted signal in response to the first predetermined signal being detected; timing means responsive to the synchronization means for producing a first timing signal indicative of the occurrence of the first portion of a subsequent predetermined signal and a second timing signal indicative of the occurrence of the second portion of the subsequent predetermined signal; said synchronization means being further responsive to the first timing signal for maintaining synchronization with the transmitted signal when the first portion of each subsequently transmitted predetermined signal is received and detected; and conservation means being responsive to the second timing signal for disabling the receiving means during the second portion of each subsequently transmitted predetermined signal following the detection of the first portion of the predetermined signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification