Method and apparatus for synchronizing time of day of terminal in convergent network
First Claim
1. A method of synchronizing a time of day (TOD) of a terminal in a convergent network, the method comprising:
- registering and storing identification information and TOD information of a terminal;
obtaining a first path delay time caused by a TOD synchronization message transmission path between the terminal and a TOD synchronization adjusting and storage unit that adjusts TOD synchronization of the terminal, and registers and stores the identification information and the TOD information;
obtaining a second path delay time caused by a TOD synchronization message transmission path between the TOD synchronization adjusting and storage unit and a time server providing a standard time;
obtaining delay compensated TOD information by applying the first path delay time and the second path delay time to the standard time;
converting the delay compensated TOD information to a form of TOD information of the terminal; and
transmitting the converted delay compensated TOD information to the terminal,wherein when a plurality of terminals are connected to the TOD synchronization adjusting and storage unit, selecting one of the plurality of terminals, and multicasting and transmitting the delay compensated TOD information to the plurality of terminals.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a method and apparatus for synchronizing a time of day (TOD) in a convergent network, wherein the TOD is received from a time server connected in the convergent network and is provided to a terminal connected in a wired or wireless network, specifically a terminal connected in a heterogeneous network, that requires TOD information. The apparatus includes a time server that provides standard TOD information, a gateway or a host personal computer (PC) that provides the standard TOD information of the time server to the terminal in a 3rd layer or lower instead of an upper layer of the open system interconnection (OSI) 7 layer model, and the terminal that adjusts a local clock according to the provided standard TOD information. According to the method and apparatus, the terminal not only maintains a very precise TOD by obtaining TOD information of the time server periodically or when required, but also obtains the TOD information without using application software for processing the TOD information. Accordingly, power consumption of the terminal is decreased.
-
Citations
19 Claims
-
1. A method of synchronizing a time of day (TOD) of a terminal in a convergent network, the method comprising:
-
registering and storing identification information and TOD information of a terminal; obtaining a first path delay time caused by a TOD synchronization message transmission path between the terminal and a TOD synchronization adjusting and storage unit that adjusts TOD synchronization of the terminal, and registers and stores the identification information and the TOD information; obtaining a second path delay time caused by a TOD synchronization message transmission path between the TOD synchronization adjusting and storage unit and a time server providing a standard time; obtaining delay compensated TOD information by applying the first path delay time and the second path delay time to the standard time; converting the delay compensated TOD information to a form of TOD information of the terminal; and transmitting the converted delay compensated TOD information to the terminal, wherein when a plurality of terminals are connected to the TOD synchronization adjusting and storage unit, selecting one of the plurality of terminals, and multicasting and transmitting the delay compensated TOD information to the plurality of terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An apparatus for synchronizing a TOD of a terminal in a convergent network, the apparatus comprising:
-
a receiver that receives standard TOD information from a time server; and a TOD synchronization adjusting and storage unit that registers and stores identification information and TOD information of a terminal, and transmits delay compensated TOD information in a form of the TOD information of the terminal by applying a delay time caused by a TOD synchronization message transmission path between the time server and the terminal to the standard TOD. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification