Patent ID: 9215604
Filing Date: 2015-12-15
Classification: G01S,H04W

Abstract:
1. An apparatus for updating a database for wireless local area network (WLAN) based positioning, the apparatus comprising: a database configured to store a grid cell determining unit configured to determine an information-unmeasured grid cell among the grid cells stored in the database, wherein the information-unmeasured grid cell is a grid cell that has unmeasured information among parameters of the WLAN environment information matched to the grid cells; an unmeasured parameter checking unit configured to check an unmeasured parameter in the information-unmeasured grid cell; a radiowave environment estimating unit configured to generate radiowave environment estimation information by estimating the unmeasured parameter based on any one of a distance-dependent radiowave strength value application scheme and an adjacent grid cell-based interpolation scheme; and a database updating unit configured to update the information-unmeasured grid cell with the radiowave environment estimation information, wherein the radiowave environment estimating unit is configured to select adjacent grid cells among peripheral grid cells of the information-unmeasured grid cell and generate the radiowave environment estimation information including