Patent ID: 8874137
Filing Date: 2014-10-28
Classification: G01S,H04W

Abstract:
1. An apparatus for determining a positioning error, comprising: a database for storing grid cells separated by each pilot cell identifier (pCell ID) and wireless local area network (LAN) environment information matched to the grid cells; an information receiving unit for receiving terminal WLAN environment information from a mobile communication terminal; an identification information checking unit for checking access point (AP) identification information included in the terminal WLAN environment information; a triangulating unit for calculating a triangulation coordinate value by performing triangulation with AP position estimation information corresponding to the AP identification information; a grid cell positioning unit for selecting one or more grid cells corresponding to the AP identification information and calculating a grid cell coordinate value based on a coordinate value corresponding to the grid cell selected; and an error determining unit for comparing the triangulation coordinate value and the grid cell coordinate value and determining whether there is a positioning error in any one of the triangulation coordinate value and the grid cell coordinate value.