Remote monitoring and calibration of system reference clock using network timing reference
First Claim
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1. A method of calibrating a local radio reference clock for a radio operating in a radio network having a network reference clock, comprising the steps of:
- determining at the radio an offset between the local radio reference clock and the network reference clock;
placing the local radio reference clock in a calibration mode; and
calibrating the local radio reference clock by reducing sufficiently slowly the offset between the local radio reference clock and the network reference clock to enable continued radio communication with a node during calibration, the offset being reduced by adjustment of a tuning voltage of the local radio reference clock.
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Abstract
A system and method for calibrating a local radio reference clock for a radio operating in a radio network having a network reference clock. The method comprises determining at the radio an offset between the local clock and the network clock, placing the local clock in a calibration mode, and calibrating the local clock using a radio link to reduce the offset.
52 Citations
20 Claims
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1. A method of calibrating a local radio reference clock for a radio operating in a radio network having a network reference clock, comprising the steps of:
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determining at the radio an offset between the local radio reference clock and the network reference clock; placing the local radio reference clock in a calibration mode; and calibrating the local radio reference clock by reducing sufficiently slowly the offset between the local radio reference clock and the network reference clock to enable continued radio communication with a node during calibration, the offset being reduced by adjustment of a tuning voltage of the local radio reference clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A radio network comprising:
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a local reference clock in a radio; a network reference clock remote from the radio; a component configured to determine an offset between the local radio reference clock and the network reference clock; and a calibration unit for calibrating the local radio reference clock, the calibration comprising reducing sufficiently slowly the offset between the local radio reference clock and the network reference clock to enable continued radio communication with a node during calibration, the offset being reduced by adjustment of a tuning voltage of the local radio reference clock. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification