Patent ID: 9055451
Filing Date: 2015-06-09
Classification: G01C,G01S,H04W

Abstract:
1. An indoor position determination method based on WLAN (Wireless Local Area Network) signal strength, comprising: a remote monitoring step of collecting information about signal strength from a neighboring AP (Access Points) and generating an AP signal strength table; a position information requesting step of receiving identification information and signal strength of a detected AP from a mobile terminal; and a cell determination step of comparing a signal strength pattern of each AP received from the mobile terminal with a neighboring AP signal strength pattern of each AP with reference to the AP signal strength table and determining a cell having an AP with a most similar pattern as a cell where the mobile terminal is presently located, wherein in a case APs are arranged based on the received signal strength, the cell determination step performs the determination based on a similarity of AP sequences, wherein in the position information requesting step, in a case where identification information and signal strength of three or more APs are received from the mobile terminal, the method further comprises determining a detailed position of the mobile terminal in the cell, where the mobile terminal is determined as being located, by means of triangular surveying; and wherein the detailed position determining step includes calculating a distance from each AP to the mobile terminal in consideration of signal attenuation where at least one of a wall hop count and a floor hop count from each AP is reflected, when using the triangular surveying.