Patent ID: 7623959

Claim:
A system for providing voice-based supplementary information service to a mobile communication terminal being provided with road guidance service, using road map data, said system comprising: a content registration server configured to receive content for the voice-based supplementary information service, convert the content into supplementary information data having voice data format, and store the supplementary information data; at least one Global Positioning System (GPS) satellite configured to detect a location of the mobile communication terminal and transmit GPS radio waves, to the mobile communication terminal, the GPS radio waves including information regarding the location of the mobile terminal; the mobile communication terminal configured to receive the information regarding the location of the mobile terminal from the GPS satellite and request the road guidance service and the supplementary information service; a mobile communication network configured to transmit or receive data to or from the mobile communication terminal in a wireless manner; a relay server connected to the mobile communication network and configured to relay requests for the road guidance service and the supplementary information service, received from the mobile communication terminal; a road search server connected to the relay server and configured to generate road map data and transmit the road map data to the relay server so as to provide the road guidance service requested by the mobile communication terminal; a user management server configured to determine whether the request for the supplementary information service from the mobile communication terminal exists in the road map data received by the relay server, and transmit determination results to the relay server, such that if it is determined that the request for the supplementary information service from the mobile communication terminal exists, the relay server transmits the road map data to an information provision server, or if it is determined that the request for the supplementary information service does not exist, the relay server transmits only the road map data without the supplementary information data to the mobile communication terminal; and the information provision server configured to receive the road map data from the relay server, verify the type of supplementary information service included in the road map data, receive supplementary information data corresponding to the type from the content registration server, and generate supplementary information-added data in which the supplementary information data is included in a data area of the road map data, such that the mobile communication terminal provides for the supplementary information service while providing for the road guidance service.