광 네트워크 단말, 그의 시간 동기화 방법, 광 회선 단말 및 그의 네트워크 관리 방법
김성창, 김근용, 이동수, 이영석, 유학, 이문섭, 고재상, 김종덕
- 8542995 (2013.09.24)
- A method for synchronizing time by an optical network terminal (ONT) in a passive optical network system is provided. The method includes: receiving a ranging request message including a first current time of an optical line terminal (OLT); calculating a first compensation time when a transmission delay is compensated at a time that the ranging request message is received; transmitting a serial number response message to the OLT; calculating a second compensation time when the transmission delay is compensated at a time when the serial number response message is transmitted; receiving a ranging time message including a second current time when the serial number response message from the OLT is received; calculating an offset time from the first current time, the second current time, the first compensation time, and the second compensation time; and synchronizing a clock of the ONT and a clock of the OLT based on the offset time.
- KSP 제안 키워드
- Network system, Offset time, Optical Network Terminal(ONT), Optical line terminal(OLT), Optical network, Passive optical network, Serial number, transmission delay