Timestamping method and apparatus for precise network synchronization
AssigneeElectronics and Telecommunications Research Institute
InventorsSEUNG WOO LEE, Dae Geun PARK, Bhum Cheol LEE
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Abstract
A timestamping apparatus for network synchronization includes a recovery unit and a timestamping unit. The recovery unit extracts a recovery clock operating at an operation frequency of a transmission terminal from a sync signal received from the transmission terminal. The timestamping unit measures a timestamp value of an arrival time of the sync signal by measuring a phase difference between the recovery clock and a local clock of a receiving terminal.
Claims15
A timestamping apparatus for network synchronization, the apparatus comprising:
- a recovery unit extracting a recovery clock operating at an operation frequency of a transmission terminal from a sync signal received from the transmission terminal;
- and
- a timestamping unit measuring a timestamp value of an arrival time of the sync signal by measuring a phase difference between the recovery clock and a local clock of a receiving terminal.
A timestamping method for network synchronization, the timestamping method comprising:
- extracting a recovery clock operating at an operation frequency of a transmission terminal from a sync signal received from the transmission terminal;
- and
- measuring a timestamp value of an arrival time of the sync signal by measuring a phase difference between the recovery clock and a local clock of a receiving terminal.
A timestamping method for network synchronization, the timestamping method comprising:
- transmitting a timestamp value of a start time of a sync signal measured using a local clock operating at an operation frequency of a transmission terminal, by including the timestamp value in the sync signal;
- extracting a recovery clock operating at an operation frequency of the transmission terminal from the sync signal received from the transmission terminal;
- and
- measuring a timestamp value of an arrival time of the sync signal by measuring a phase difference between the recovery clock and a local clock of a receiving terminal.
Dependencies are inferred from the claim text.