Method For Estimating A Current Geographical Region Of A Device

A method for estimating a current geographical region of a device that comprises a sending and receiving unit configured to send and receive signals at a radio frequency and an analysis unit, the method comprising:

• receiving a first signal at a first radio frequency in a first geographical region by the sending and receiving unit of the device;
• determining a value of the first radio frequency and a value of a first characteristic parameter of the first signal by the analysis unit;
• providing from a database a value of a second radio frequency of a second signal and a related value of a second characteristic parameter of the second signal and wherein the combination of these two values relate to a second geographical region;
• comparing the determined value of the first radio frequency with the value of the second radio frequency, and comparing the value of the first characteristic parameter with the value of the second characteristic parameter by the analysis unit;
• and
• estimating if the device is located in the second geographical region based on the comparisons by the analysis unit.

A device comprising:

• a sending and receiving unit configured for receiving a first signal at a value of a first radio frequency in a first geographical region;
• a data storage including a database with a number of signal data are stored, each data signal comprising a combination of a value of a radio frequency and a value of a characteristic parameter related to a geographical region;
• and
• an analysis unit configured to:
• determine a first value of the first radio frequency and a value of a first characteristic parameter of the first signal;
• provide from a database a second value of a second radio frequency of a second signal and a second characteristic parameter of the second signal and wherein the combination of the first value and the second value relates to a second geographical region;
• determine a first comparison of the first value to the second value and a second comparison of the first characteristic parameter with the second characteristic parameter;
• and
• estimate if the device is located in the second geographical region based on the first and second comparisons.

A device comprising:

• a sending and receiving unit configured for receiving a first signal at a value of a first radio frequency in a first geographical region;
• a data storage includes a database that stores a number of signal data, each signal data comprising a combination of a value of a radio frequency and a value of a characteristic parameter related to a geographical region;
• an analysis unit configured to:
• determine a first value of the first radio frequency and a first parameter value of a first characteristic parameter of the first signal;
• provide from a database a second value of a second radio frequency of a second signal and a second parameter value of a second characteristic parameter of the second signal and wherein the combination of these two values relate to a second geographical region;
• determine comparisons of the first value to the second value and the first parameter value with the second parameter value;
• and
• estimate if the device is located in the second geographical region based on the comparisons;
• and
• a control unit configured to initiate sending a radio frequency signal at an allowed frequency based on the estimation.