Patent ID: 9363629
Filing Date: 2016-06-07
CPC Classification: G01S,H04W

Claim Text:
1. A method of obtaining a location of a user of a portable terminal, the method performed by a processor comprising: obtaining first location information of the user of a mobile device using a magnetic field sensor; searching a pre-stored first map including magnetic field information for a plurality of candidate areas corresponding to the first location information; selecting at least one search area from the plurality of candidate areas corresponding to the first location information based on second location information of the user; and determining the at least one search area as the location of the user, wherein the first location information includes one of a horizontal magnetic field component value, a vertical magnetic field component value, a direction of a magnetic field, and an angle between horizontality and verticality that are measured by a magnetic field sensor, and wherein the second location information includes one of the horizontal magnetic field component value, the vertical magnetic field component value, the direction of the magnetic field, the angle between horizontality and verticality, and any other information that are measured by the magnetic field sensor except for the one included in the first location information, information that is measured by an acceleration sensor, an inertial sensor, a gyro sensor, a pressure sensor, an ultrasound sensor, or other sensor, or any of a variety of information that is obtained from a RF-RSSI information, a WLAN map, an RFID map, a vision map, and any other information, wherein the pre-stored first map includes coordinate information of a magnetic field map, wherein the magnetic field information at the coordinate information is saved as three-dimensional components.