Systems and methods for transporting time-of-day information in a communication system
First Claim
1. A method for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location, comprising:
- receiving, by a time-of-day transmission convergence (ToD-TC) module in the CO, ToD information relating to the master clock;
transporting the ToD information from the CO to the CPE;
based on the received ToD information, applying time stamps to reference data samples;
transporting the reference data samples with the applied time stamps from the CO to the CPE; and
utilizing the time stamps applied to the transported reference data samples and the transported ToD information to synchronize the CPE clock with the master clock.
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Accused Products
Abstract
Systems and methods for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location are described. One embodiment is a method that comprises receiving, by a time-of-day transmission convergence (ToD-TC) module in the CPE, ToD information relating to the master clock. Based on the received information, time stamps are applied to reference data samples. The method further comprises transporting the ToD information by transporting the reference data samples with applied time stamps and utilizing time stamps of the reference data samples to synchronize the CPE clock with the master clock.
28 Citations
23 Claims
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1. A method for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location, comprising:
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receiving, by a time-of-day transmission convergence (ToD-TC) module in the CO, ToD information relating to the master clock; transporting the ToD information from the CO to the CPE; based on the received ToD information, applying time stamps to reference data samples; transporting the reference data samples with the applied time stamps from the CO to the CPE; and utilizing the time stamps applied to the transported reference data samples and the transported ToD information to synchronize the CPE clock with the master clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location, comprising:
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receiving, by a time-of-day transmission convergence (ToD-TC) module at the CO, time-of-day (ToD) information relating to the master clock; transporting the ToD information to the CPE; based on the received information, applying time stamps to reference data samples once every discrete multi-tone (DMT) super-frame; transporting the reference data samples with applied time stamps to the CPE; and utilizing, by a time-of-day transmission convergence (ToD-TC) module at the CPE, time stamps of the reference data samples and the transported ToD information to synchronize the CPE clock with the master clock with respect to frequency and phase. - View Dependent Claims (17, 18, 19)
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20. A system for synchronizing a clock at a customer premises equipment (CPE) location with a master clock at a central office (CO) location, comprising:
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a first time-of-day transmission convergence (ToD-TC) module at the CO configured to receive time-of-day (ToD) information relating to the master clock, the first ToD-TC module further configured to time stamp reference data samples and transmit the ToD information and the time stamped reference data samples to the CPE; a second ToD-TC module at the CPE configured to receive the ToD information and the time stamp reference data samples from the first ToD-TC module and synchronize the CPE clock with the master clock based on the received ToD information and the time stamped reference data samples. - View Dependent Claims (21, 22, 23)
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Specification