Method and device for updating a database for wireless lan based positioning

An apparatus for updating a database for wireless local area network (LAN) based positioning, comprising:

• a database for storing grid cells divided by pilot cell identifier (pCell ID) and base station-derived environment information and wireless LAN environment information matched to the grid cells;
• a grid cell determining unit for determining an information-unmeasured grid cell among the grid cells, the information-unmeasured grid cell being a grid cell that has unmeasured information among parameters of the wireless LAN environment information matched to the grid cells;
• an unmeasured parameter checking unit for determining that unmeasured information in the information-unmeasured grid cell is a received signal strength value and that position information of an access point (AP) transmitting a wireless LAN signal is stored in the information-unmeasured grid cell;
• a radiowave environment estimating unit for generating radiowave environment estimation information including first estimated AP signal strength information obtained by estimating a signal strength of the AP by applying the distance-dependent radiowave strength value application scheme to the position information of the AP;
• and
• a database updating unit for reflecting the radiowave environment estimation information in the information-unmeasured grid cell determined.

An apparatus for updating a database for wireless local area network (LAN) based positioning, comprising:

• a database for storing grid cells divided by pilot cell identifier (pCell ID) and base station-derived environment information and wireless LAN environment information matched to the grid cells;
• a grid cell determining unit for determining an information-unmeasured grid cell among the grid cells, the information-unmeasured grid cell being a grid cell that has unmeasured information among parameters of the wireless LAN environment information matched to the grid cells;
• an unmeasured parameter checking unit for determining that unmeasured information in the information-unmeasured grid cell is a received signal strength value and a medium access control (MAC) address of an access point (AP) transmitting a wireless LAN signal;
• a radiowave environment estimating unit for selecting adjacent grid cells among peripheral grid cells of the information-unmeasured grid call, estimating a common MAC address shared in the adjacent grid cells selected as the MAC address of the AP, and generating radiowave environment estimation information including a second estimated AP signal strength value obtained by estimating the received signal strength value as a signal strength mid-value of the AP corresponding to the common MAC address;
• and
• a database updating unit for reflecting the radiowave environment estimation information in the information-unmeasured grid cell determined.