Battery saving apparatus and method providing optimum synchronization codeword detection
First Claim
1. A battery saving method for supplying power to a selective call communication receiver for enabling the detection of a synchronization codeword in data received in a predetermined signaling format having a predetermined message batch length, said method comprising the steps of:
- (a) supplying power to the receiver for a first portion of a first predetermined time interval, the first predetermined time interval having a time duration equal to at least the message batch length plus one codeword, for enabling the detection of valid data in the predetermined signaling format(b) maintaining the supply of power to the receiver for the remainder of the first predetermined time interval in response to detecting valid data in the first portion of the first predetermined time interval;
(c) correlating the received data during the first predetermined time interval for the detection of the synchronization codeword;
(d) re-enabling the detection of valid data within a second portion of the first predetermined time interval, in response to the synchronization codeword not being detected prior to the second portion; and
(e) maintaining the supply of power to the receiver for a second predetermined time interval, in response to the subsequent detection of valid data in the second portion of the first predetermined time interval.
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Accused Products
Abstract
A battery saving apparatus for supplying power to a selective call communication receiver for enabling the detection of a synchronization codeword in data received in a predetermined signaling format comprises circuits for supplying power to the receiver, and for detecting valid data received during a first portion of the first predetermined time interval. Power is maintained to the receiver for the remainder of the first predetermined time interval when valid data is detected in the first portion. A synchronization codeword detector is included for detecting a synchronization codeword. When valid data is subsequently detected following a second portion of the first predetermined time interval and the synchronization codeword is not detected in the first predetermined time interval, power is maintained to the receiver for a second predetermined time interval to further enable detection of the synchronization codeword.
75 Citations
34 Claims
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1. A battery saving method for supplying power to a selective call communication receiver for enabling the detection of a synchronization codeword in data received in a predetermined signaling format having a predetermined message batch length, said method comprising the steps of:
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(a) supplying power to the receiver for a first portion of a first predetermined time interval, the first predetermined time interval having a time duration equal to at least the message batch length plus one codeword, for enabling the detection of valid data in the predetermined signaling format (b) maintaining the supply of power to the receiver for the remainder of the first predetermined time interval in response to detecting valid data in the first portion of the first predetermined time interval; (c) correlating the received data during the first predetermined time interval for the detection of the synchronization codeword; (d) re-enabling the detection of valid data within a second portion of the first predetermined time interval, in response to the synchronization codeword not being detected prior to the second portion; and (e) maintaining the supply of power to the receiver for a second predetermined time interval, in response to the subsequent detection of valid data in the second portion of the first predetermined time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A battery saving apparatus for supplying power to a selective call communication receiver for enabling the detection of a synchronization codeword in data received in a predetermined signaling format having a predetermined message batch length, said apparatus comprising:
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means for supplying power to the receiver for a first portion of a first predetermined time interval, the first predetermined time interval having a time duration equal to at least the message batch length plus one codeword; means for detecting valid data in the predetermined signaling format during the first portion of the first predetermined time interval; means for maintaining the supply of power to the receiver for the remainder of the first predetermined time interval in response to detecting valid data in the first portion of the first predetermined time interval; means, responsive to the received data, for detecting the synchronization codeword during the first predetermined time interval; means for subsequently detecting valid data, during a second portion of the first predetermined time interval, in response to the synchronization codeword not being detected prior to the second portion; and means for maintaining the supply of power to the receiver for a second predetermined time interval, in response to the subsequent detection of valid data in the second portion of the first predetermined time interval. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification