Apparatus and Method for Determining a Current Position of a Mobile Device

A method for determining a current position of a mobile device within an environment in which at least one transmitter is disposed, comprising:

• providing a cartographic map of the environment, the cartographic map of the environment including field strength reference values at reference points;
• determining a field strength value at the current position;
• deriving reference points within reach that can be reached starting from a previous position of the mobile terminal by movement of the mobile terminal in the environment within a predetermined time interval, from the cartographic map of the environment;
• and
• comparing the field strength value to the field strength reference values at the reference points within reach,
• characterized by the step of establishing the reference point the field strength reference value of which most likely corresponds to the field strength value as current position.

A computer program with a program code for performing, when the program is executed on a computer, a method for determining a current position of a mobile device within an environment in which at least one transmitter is disposed, comprising:

• providing a cartographic map of the environment, the cartographic map of the environment including field strength reference values at reference points;
• determining a field strength value at the current position;
• deriving reference points within reach that can be reached starting from a previous position of the mobile terminal by movement of the mobile terminal in the environment within a predetermined time interval, from the cartographic map of the environment;
• and
• comparing the field strength value to the field strength reference values at the reference points within reach,
• characterized by the step of establishing the reference point the field strength reference value of which most likely corresponds to the field strength value as current position.