Electronic device, external server, and method for controlling same

An external server comprising:

• a communication circuit configured to obtain movement information of a first electronic device and image information of a place where the first electronic device moves;
• a memory having stored therein space information corresponding to the place where the first electronic device moves;
• and
• a processor configured to;
• receive a plurality of first candidate locations, which are candidates for a location of the first electronic device, from the first electronic device using the communication circuit,
• determine at least one second candidate location after obtaining a request for the at least one second candidate location among the plurality of first candidate locations from the first electronic device based, on the electronic device determining a sum of probabilities of the electronic device being in each of the plurality of first candidate locations is smaller than a defined first accuracy value, and
• transmit the at least one second candidate location to the first electronic device.

A control method of an electronic device, the method comprising:

• obtaining movement information of the electronic device;
• obtaining image information of a place where the electronic device moves;
• determining a plurality of first candidate locations, which are candidates for a location of the electronic device, in the place using the movement information of the electronic device and pre-stored space information corresponding to the place where the electronic device moves;
• determining, based on the image information and the plurality of first candidate locations, whether a sum of probabilities of the electronic device being in each of the plurality of first candidate locations is smaller than a defined first accuracy value;
• based on the sum of probabilities of the electronic device being in each of the plurality of first candidate locations being smaller than the defined first accuracy value, obtaining at least one second candidate location from among the plurality of first candidate locations based on a result of the determination from an external server;
• based on a sum of probabilities of the electronic device being in each of the plurality of first candidate locations being greater than or equal to the defined first accuracy value, obtaining, by calculating, the at least one second candidate location from among the plurality of first candidate locations;
• and
• determining an estimated location of the electronic device using the obtained at least one second candidate location.

A control method of an external server, the method comprising:

• obtaining movement information of a first electronic device and image information of a place where the first electronic device moves;
• storing space information corresponding to the place where the first electronic device moves;
• receiving a plurality of first candidate locations, which are candidates for a location of the first electronic devices from the first electronic device;
• determining at least one second candidate location after obtaining a request for the at least one second candidate location among the plurality of first candidate locations from the first electronic device, based on the electronic device determining a sum of probabilities of the electronic device being in each of the plurality of first candidate locations is smaller than a defined first accuracy value;
• and
• transmitting the at least one second candidate location to the first electronic device.