Patent ID: 9344855
Filing Date: 2016-05-17
CPC Classification: H04W

Claim Text:
1. A method for finding an indoor position of a user terminal, the method comprising: calculating, by a processor, a first signal loss data received from an (i−1)-th floor and a second signal loss data received from an (i+1)-th floor, wherein the user terminal is located in an i-th floor; comparing the first signal loss data and the second signal loss data to a pre-stored signal loss data; identifying the i-th floor on which the user terminal is located based on a calculation of the first signal loss data and the second signal loss data using a mathematical model; calculating a wall signal loss data on the i-th floor and a received signal strength (RSS); identifying the indoor position on the i-th floor; and tracking, by the processor, the indoor position of the user terminal as the user terminal moves inside a building of a plurality of floors.