Using broadcast position and transmit power from access points to form assistance data

A location server for preparing assistance data, the location server comprising:

• a crowd-sourced database reports for a plurality of access points, wherein the crowd-sourced database for an access point comprises ranging information for the access point measured by a plurality of mobile devices and a location of each mobile device in the plurality of mobile devices;
• an assistance data database containing a position of each of the plurality of access points;
• and
• a processor coupled to the crowd-sourced database and the assistance data database, and configured to:
• compute a crowd-sourced position from the crowd-sourced database for each access point, wherein the crowd-sourced position is computed based on the ranging information measured by the plurality of mobile devices and the location of each mobile device;
• determine that the access point is broadcasting a broadcast position of the access point;
• set the position of the access point based on information of the crowd-sourced position computed by the location server and the broadcast position broadcasted by the access point;
• save the position of the access point to the assistance data database.

A location server for preparing assistance data, the location server comprising:

• means for computing a crowd-sourced position from a crowd-sourced database for an access point, wherein the crowd-sourced database for the access point comprises ranging information for the access point measured by a plurality of mobile devices and a location of each mobile device in the plurality of mobile devices, wherein the crowd-sourced position is computed based on the ranging information measured by the plurality of mobile devices and the location of each mobile device;
• means for determining that the access point is broadcasting a broadcast position of the access point;
• means for setting a position of the access point based on information of the crowd-sourced position computed by the location server and the broadcast position broadcasted by the access point;
• means for saving the position of the access point to an assistance data database.

A non-transitory computer-readable storage medium for preparing assistance data in a location server, the non-transitory computer-readable storage medium including program code stored thereon, comprising program code to:

• compute a crowd-sourced position from a crowd-sourced database for an access point, wherein the crowd-sourced database for the access point comprises ranging information for the access point measured by a plurality of mobile devices and a location of each mobile device in the plurality of mobile devices, wherein the crowd-sourced position is computed based on the ranging information measured by the plurality of mobile devices and the location of each mobile device;
• determine that the access point is broadcasting a broadcast position of the access point;
• set a position of the access point based on the crowd-sourced position computed by the location server and the broadcast position broadcasted by the access point;
• save the position of the access point to an assistance data database.