Mobile device positioning

An apparatus for determining a mobile device location, the apparatus comprising:

• a transceiver configured to receive one or more signals from one or more transmitters;
• one or more processors communicatively coupled to the transceiver and configured to:
• measure signal characteristics of the one or more received signals;
• download data from a database corresponding to a defined region associated with the transmitters wherein the downloaded data comprises a plurality of position points, a classification of each position point, and expected signal characteristics for each position point;
• compare the measured signal characteristics with the expected signal characteristics for each position point;
• assign a weight to position points based on factors including the compared signal characteristics;
• and
• determine the mobile device location by selecting one position point of the plurality of position points as a position point solution corresponding to the mobile device location based on the assigned weight wherein the position point solution is constrained by the classification of each position point.

An apparatus for determining a mobile device location, the apparatus comprising:

• means for receiving one or more signals from one or more transmitters;
• means for measuring signal characteristics of the one or more received signals;
• means for downloading data from a database corresponding to a defined region associated with the transmitters wherein the downloaded data comprises a plurality of position points, a classification of each position point, and expected signal characteristics for each position point;
• means for comparing the measured signal characteristics with the expected signal characteristics for each position point;
• means for assigning a weight to position points based on factors including the compared signal characteristics;
• and
• means for determining the mobile device location by selecting one position point of the plurality of position points as a position point solution corresponding to the mobile device location based on the assigned weight wherein the position point solution is constrained by the classification of each position point.

A computer program product residing on a processor-readable non-transitory storage medium and comprising processor-readable instructions executable by one or more processors to:

• receive one or more signals from one or more transmitters;
• measure signal characteristics of the one or more received signals;
• download data from a database corresponding to a defined region associated with the transmitters wherein the downloaded data comprises a plurality of position points, a classification of each position point, and expected signal characteristics for each position point;
• compare the measured signal characteristics with the expected signal characteristics for each position point;
• assign a weight to position points based on factors including the compared signal characteristics;
• and
• determine the mobile device location by selecting one position point of the plurality of position points as a position point solution corresponding to the mobile device location based on the assigned weight wherein the position point solution is constrained by the classification of each position point.