DRX OPERATION WITH CRYSTAL OSCILLATOR
First Claim
Patent Images
1. A method, comprising:
- in a receiver, receiving from a transmitter an instruction to check for messages from the transmitter at intervals having a specified time period;
estimating at the receiver a frequency error of the receiver relative to the transmitter, and selecting, based on the estimated frequency error, an actual time period that does not exceed the specified time period; and
activating the receiver periodically according to the selected actual time period so as to reset the frequency error.
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Abstract
A method in a receiver includes receiving from a transmitter an instruction to check for messages from the transmitter at intervals having a specified time period. A frequency error of the receiver relative to the transmitter is estimated at the receiver, and an actual time period that does not exceed the specified time period is selected based on the estimated frequency error. The receiver is activated periodically according to the selected actual time period so as to reset the frequency error.
13 Citations
20 Claims
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1. A method, comprising:
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in a receiver, receiving from a transmitter an instruction to check for messages from the transmitter at intervals having a specified time period; estimating at the receiver a frequency error of the receiver relative to the transmitter, and selecting, based on the estimated frequency error, an actual time period that does not exceed the specified time period; and activating the receiver periodically according to the selected actual time period so as to reset the frequency error. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus, comprising:
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a receiver, which is configured to receive from a transmitter an instruction to check for messages from the transmitter at intervals having a specified time period, and to estimate a frequency error of the receiver relative to the transmitter; and control circuitry, which is configured to select, based on the estimated frequency error, an actual time period that does not exceed the specified time period, and to activate the receiver periodically according to the selected actual time period so as to reset the frequency error. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification