Terminal for collecting traffic information and method of generating traffic information
First Claim
1. A terminal for collecting traffic information, comprising:
- a Global Positioning System (GPS) unit for receiving GPS signals from at least one satellite to obtain absolute GPS coordinates and generate relative GPS coordinates from the absolute GPS coordinates;
a Dead Reckoning (DR) unit for receiving signals from a direction sensor and a velocity sensor and calculating relative coordinates based on DR;
an information generation unit for generating, using data received from the GPS reception unit and the DR unit, a data set including information about a measurement start point and a travel locus, periodically measured for a predetermined period from the start point, wherein the start point information includes a vehicle ID, and absolute coordinates and an absolute time at the start point, and the travel locus information includes relative coordinates of each measurement location with respect to a previous measurement location; and
a transmission unit for periodically transmitting the data set generated by the information generation unit to a remote traffic information center over a wireless communication network.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides a terminal for collecting traffic information generates a data set, including information about a measurement start point and a travel locus, periodically measured for a predetermined period from the start point, using DR information based on DR and GPS information, and transmits the data set to a remote traffic information center. The start point includes a vehicle ID, and absolute coordinates and an absolute time at the start point, and the travel locus information includes relative coordinates of each measurement location with respect to a previous measurement location. A method for generating traffic information in a remote traffic information center using information collected from the terminal is also provided. Accordingly, the present invention can reduce the amount of data provided by the terminal to the remote traffic information center, and can generate high-precision traffic information even in an area in which the reception of GPS signals is not possible and GPS signals are weak.
24 Citations
11 Claims
-
1. A terminal for collecting traffic information, comprising:
-
a Global Positioning System (GPS) unit for receiving GPS signals from at least one satellite to obtain absolute GPS coordinates and generate relative GPS coordinates from the absolute GPS coordinates; a Dead Reckoning (DR) unit for receiving signals from a direction sensor and a velocity sensor and calculating relative coordinates based on DR; an information generation unit for generating, using data received from the GPS reception unit and the DR unit, a data set including information about a measurement start point and a travel locus, periodically measured for a predetermined period from the start point, wherein the start point information includes a vehicle ID, and absolute coordinates and an absolute time at the start point, and the travel locus information includes relative coordinates of each measurement location with respect to a previous measurement location; and a transmission unit for periodically transmitting the data set generated by the information generation unit to a remote traffic information center over a wireless communication network. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of generating traffic information in a remote traffic information center using information about a travel locus of a vehicle, collected from a terminal installed in the vehicle over a wireless communication network, comprising:
-
periodically receiving a data set including information about a measurement start point and a travel locus, periodically measured for a predetermined period from the start point, wherein the start point information includes a vehicle ID, and absolute coordinates and an absolute time at the start point, and the travel locus information includes relative coordinates of each measurement location with respect to a previous measurement location; generating traffic flow information for each link by processing the data set received from the terminal; and adding road accident information to the traffic flow information for each link, thus generating traffic information. - View Dependent Claims (7, 8, 9, 10, 11)
-
Specification