Patent ID: 7672780

Claim:
A navigation system using a RFID (Radio Frequency IDentification) system, the system comprising: a RFID tag for storing construction information comprising construction site, construction period, construction running lane, and bypass road information, and upon receipt of a predetermined command, transmitting the construction information, wherein the RFID tag is of an active type using a self power source to increase a transmission distance of the construction information; a RFID reader for transmitting an information read command to the RFID tag, and receiving the construction information in response to the information read command; an interface unit for performing a data communication with the RFID reader; a digital multimedia broadcasting receiver for receiving traffic broadcasting information; a GPS (global positioning system) module for receiving position signals from a plurality of GPS satellites, respectively, and calculating a self position; a storage unit for storing map data and the traffic broadcasting information under a predetermined control; a display unit for displaying the map data; and a controller for mapping the self position to the map data, receiving a destination inputted by a user, searching a path from the self position to the destination, mapping the searched path to the map data, displaying the mapped path on the display unit, performing path guidance along the searched path, and, upon receipt of the construction information from the RFID reader through the interface unit, re-searching the path using the bypass road information to bypass the construction site, and guiding the re-searched path, wherein upon the receipt of the construction information from the RFID reader the navigation system analyzes the received construction information and determines whether or not the construction area is currently in a search path area, wherein when it is determined to be currently in the search path area, the RFID reader performs a path re-search, and wherein when it is determined to be currently in the search path area, the controller maps the construction area on the map data, displays the mapped construction area, and displays a bypass-or-not selection request message for inquiring of the user whether or not it re-searches the path bypassing the construction area, on the display unit.