Abstract: A mobile communication terminal capable of position determination, including: a base station information recorder recording detailed base station information corresponding to at least one base station; a base station signal receiver receiving base station signal information from a reference base station at a predetermined interval; a base station information reader reading the detailed base station information with respect to a base station corresponding to the received base station signal information, from the base station information recorder; and a position determiner determining a position of the mobile communication terminal by using the received base station signal information and the read detailed base station information.

Abstract: A method and an apparatus for estimating a location of a terminal are provided. The method includes: receiving at least one base station signal from each of at least one base station; computing received signal information with respect to the received signal; and estimating the location of the terminal based on signal transmission direction information associated with the base station and the computed received signal information. The present invention can accurately estimate the location of the terminal based on directional information of base station signals.

Abstract: A method and system for determining a location of a mobile communication device for an improvement of a positioning through a self-learning processing algorithm. In the method and system for determining a location of a mobile communication device, a self-learning processing unit batch processes GPS-based positioning results accumulated in a first self-learning database, and generates a sector direction value. Also, the self-learning processing unit generates optimized environment parameters, which is necessary for wireless network-based positioning, and basic data for a pattern matching, and updates the optimized environment parameters and basic data in a second self-learning database. Accordingly, the system for determining a location of a mobile communication device performs a positioning through a pattern matching method by using results accumulated in the second self-learning database.

Abstract: A location based service method and location based service system is provided. The location based service method includes: making requests for position determination of a client terminal according to a first position determination method and a second position determination method, in response to a location based service request; receiving a position determination result according to the first position determination method, and generating first location data including additional information which corresponds to the position determination result according to the first position determination method; providing the client terminal with the first location data; receiving a position determination result according to the second position determination method, and generating second location data, the second location data being refined first location data; and providing the client terminal with the second location data.

Abstract: A method of determining a location of a mobile communication terminal, the method including: receiving base station identification signals from a plurality of base stations; calculating distance ratios between the plurality of base stations and the mobile communication terminal, from the received base station identification signals; generating first variables and second variables from the distance ratios; and determining the location of the mobile communication terminal from the first variables and the second variables is provided.