Time synchronization method for vehicles having navigation device
First Claim
Patent Images
1. A method of performing time synchronization using a navigation device, comprising:
- (a) performing time synchronization between a GPS satellite and the navigation device by receiving GPS signals at the navigation device from at least one GPS satellite;
(b) establishing an interface between the navigation device and a time-using device, the time-using device being a clock device installed in a transporter or a black box installed in a transporter;
(c) setting a time period for transmitting time information to the navigation device;
(d) performing time synchronization between the navigation device and the time-using device by transmission of current time information from the navigation device to the time-using device periodically according to the set time period, and(e) changing from the time-using device to an internal clock generation mode to generate a clock according to its internal clock, when time synchronization between the time-using device and the navigation device is cut off because the GPS satellite is not communicating with the navigation device.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a method of performing time synchronization using a navigation device. The method includes: (a) performing time synchronization between a GPS satellite and a navigation device by receiving GPS signals by a navigation device from at least one GPS satellite; (b) establishing an interface between the navigation device and a time-using device; (c) setting conditions for transmitting time information to the navigation device; and (d) performing time synchronization between the navigation device and the time-using device by transmission of time information from the navigation device to the time-using device.
9 Citations
15 Claims
-
1. A method of performing time synchronization using a navigation device, comprising:
-
(a) performing time synchronization between a GPS satellite and the navigation device by receiving GPS signals at the navigation device from at least one GPS satellite; (b) establishing an interface between the navigation device and a time-using device, the time-using device being a clock device installed in a transporter or a black box installed in a transporter; (c) setting a time period for transmitting time information to the navigation device; (d) performing time synchronization between the navigation device and the time-using device by transmission of current time information from the navigation device to the time-using device periodically according to the set time period, and (e) changing from the time-using device to an internal clock generation mode to generate a clock according to its internal clock, when time synchronization between the time-using device and the navigation device is cut off because the GPS satellite is not communicating with the navigation device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A time synchronization navigation system, comprising:
-
a navigation device receiving GPS signals from a GPS satellite so as to generate current time information, and transmitting the current time information; an interface configured to transmit the current time information between the navigation device and a time-using device, the time-using device being a clock device installed in the transporter or a black box installed in the transporter; and the time-using device receiving the current time information periodically according to a preset time period from the navigation device through the interface so as to perform time synchronization between the navigation device and the time-using device with the current time information. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A clock device, comprising:
-
a time information receiving unit receiving first current time information from a navigation device periodically according to a preset time period so as to perform time synchronization between the navigation device and the clock device, the clock device being installed in a transporter; a clock generating unit generating second current time information; a controller operating so as to use the second current time information from the clock generating unit when the time information receiving unit cannot receive the first current time information any more; and a display unit displaying at least one of the first current time information and the second current time information.
-
Specification