APPARATUS AND METHOD FOR PERFORMING TIME SYNCHRONIZATION USING GPS INFORMATION IN COMMUNICATION SYSTEM
First Claim
1. An apparatus for performing time synchronization by using Global Positioning System (GPS) information in a communication system, the apparatus comprising:
- a grand-master node having a GPS receiver, and for generating a synchronizing message including Time Of Day (TOD) information received from the GPS receiver; and
at least one slave node for receiving the synchronizing message from the grand-master node for carrying out time synchronization operation by using an Offset and Frequency Compensation Clock (OFCC) synchronization process supporting time offset and frequency separation compensation.
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Abstract
Disclosed is an apparatus and a method for performing time synchronization by using Global Positioning System (GPS) information in a communication system. The apparatus comprises a grand-master node having a GPS receiver, for generating a synchronizing message required to synchronize time on slave nodes by using Time Of Day (TOD) information received from the GPS receiver and at least one slave node for receiving the synchronizing message required to synchronize time from the grand-master node or from another slave node, for carrying out time synchronization operation by using an Offset and Frequency Compensation Clock (OFCC) synchronization process supporting time offset and frequency separation compensation, and for generating a synchronizing message required to synchronize time on other slave nodes.
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Citations
24 Claims
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1. An apparatus for performing time synchronization by using Global Positioning System (GPS) information in a communication system, the apparatus comprising:
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a grand-master node having a GPS receiver, and for generating a synchronizing message including Time Of Day (TOD) information received from the GPS receiver; and at least one slave node for receiving the synchronizing message from the grand-master node for carrying out time synchronization operation by using an Offset and Frequency Compensation Clock (OFCC) synchronization process supporting time offset and frequency separation compensation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 15)
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10. A method for performing time synchronization by using Global Positioning System (GPS) information in a communication system, the method comprising the steps of:
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generating a synchronizing message required to synchronize time on at least one slave node by using Time Of Day (TOD) information that a grand-master node having a GPS receiver receives from a GPS receiver, and transmitting the generated synchronizing message to the at least one slave node; and receiving, by the at least one slave node, the synchronizing message, carrying out time synchronization operation by using an Offset and Frequency Compensation Clock (OFCC) synchronization process supporting time offset and frequency separation compensation. - View Dependent Claims (11, 12, 13, 14, 16)
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17. An apparatus comprising:
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a Precision Time Protocol (PTP) generator for encapsulating time of day (TOD) information in a PTP scheme in order to produce a synchronizing message; a time stamp generator for generating a time stamp according to the IEEE 1588 standard in the synchronizing message a time stamp checker for processing time-stamped information of a synchronizing message received; a clock and timing generating unit for generating 1 Pulse Per Second (1PPS), Pulse Per 2 Second (PP2S), and 10 MHz output signals by using the synchronized TOD information; and a CPU for carrying out a time synchronization operation by using an OFCC synchronization process. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification