Route entry guiding device and method in a navigation system using a portable terminal
First Claim
1. A route entry guidance device in a navigation system using a portable terminal, including a navigation component, comprising:
- a transmitter/receiver for transmitting information including a departure point and a destination entered by a user to a traffic information center over a wireless network and receiving optimum route data from the traffic information center over the wireless network in response to the transmitted information;
a guiding mode determiner for calculating a shortest distance to an optimum route indicated by the optimum route data and determining a guiding mode according to the shortest distance, if the optimum route data does not include a road where a vehicle is currently positioned;
a heading determiner for determining a heading of the vehicle with respect to true north using latitude and longitude coordinates of two points measured by a GPS (Global Positioning System);
a projection direction determiner for calculating a relative angle of a projection direction to the optimum route with respect to the vehicle and determining a direction to the optimum route according to the calculated relative projection direction angle; and
a route direction determiner for calculating a relative angle of the direction the optimum route runs with respect to the vehicle and determining a route direction according to the calculated relative route direction angle, wherein the vehicle is guided to the entry to the optimum route according to the determined guiding mode, direction to the optimum route, and route direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A route entry guidance device and method in a navigation system using a portable terminal. A navigation component in the route entry guidance device transmits information about a departure point and a destination entered by a user to a traffic information center over a wireless network and receives optimum route data from the traffic information center over the wireless network, using a transmitter/receiver. If the optimum route data does not include a road corresponding to the present position of a vehicle, the navigation component determines a guiding mode according to the shortest distance, the heading of the vehicle with respect to true north, the direction to the optimum route, and a route direction, using a guiding mode determiner, a heading determiner, a projection direction determiner, and a route direction determiner. Then, the navigation component guides the vehicle to the entry to the optimum route according to the determined guiding mode, direction to the optimum route, and route direction.
8 Citations
10 Claims
-
1. A route entry guidance device in a navigation system using a portable terminal, including a navigation component, comprising:
-
a transmitter/receiver for transmitting information including a departure point and a destination entered by a user to a traffic information center over a wireless network and receiving optimum route data from the traffic information center over the wireless network in response to the transmitted information;
a guiding mode determiner for calculating a shortest distance to an optimum route indicated by the optimum route data and determining a guiding mode according to the shortest distance, if the optimum route data does not include a road where a vehicle is currently positioned;
a heading determiner for determining a heading of the vehicle with respect to true north using latitude and longitude coordinates of two points measured by a GPS (Global Positioning System);
a projection direction determiner for calculating a relative angle of a projection direction to the optimum route with respect to the vehicle and determining a direction to the optimum route according to the calculated relative projection direction angle; and
a route direction determiner for calculating a relative angle of the direction the optimum route runs with respect to the vehicle and determining a route direction according to the calculated relative route direction angle, wherein the vehicle is guided to the entry to the optimum route according to the determined guiding mode, direction to the optimum route, and route direction. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A route entry guidance method in a navigation system using a portable terminal, comprising the steps of:
-
(1) receiving information including a departure point and a destination from a user;
(2) transmitting the departure point and destination information to a traffic information center;
(3) downloading optimum route information processed in a predetermined format from the traffic information center;
(4) checking whether the optimum route data contains a road corresponding to a present position of a vehicle measured by a navigation sensor; and
(5) guiding the vehicle to an entry to an optimum route if the optimum route data does not include the road corresponding to the present vehicle position. - View Dependent Claims (8, 9)
-
-
10. A method of guiding a vehicle to an entry to an optimum route when a road corresponding to a present position of the vehicle is not contained in optimum route data downloaded from a traffic information service center using a portable terminal, the method comprising the steps of:
-
calculating a shortest distance to the optimum route;
determining a guiding mode according to the shortest distance;
determining a heading of the vehicle with respect to true north using latitude and longitude coordinates of two points measured by a GPS (Global Positioning System);
calculating a relative angle of a projection direction to the optimum route with respect to the vehicle and determining a direction to the optimum route according to the calculated relative projection direction angle;
calculating a relative angle of the direction the optimum route runs with respect to the vehicle and determining a route direction according to the calculated relative route direction angle; and
guiding the vehicle to the entry to the optimum route according to the determined guiding mode, direction to the optimum route, and route direction.
-
Specification