Method and system for fencing animals without using a physical fence

A method for fencing animals without the use of a physical fence using a system including a portable device for attachment to an animal using a fastening device, which portable device is provided with a power supply, a Global Navigation Satellite System, microcontroller provided with an external or internal storage device, a means for generating an electric shock, and a communication device wherein the method comprises the following steps performed by the system:

• a) system reboot or wake-up from an automatically-activated power saving mode,
• b) acquiring current position, speed and validity for a position measurement for the animal,
• c) checking if the validity of the position measurement in step b) meets predefined criteria and/or if the speed measured in step b) is higher than a predefined level, and if the position measurement is invalid or the speed is higher than the predefined level, return to step a), otherwise proceed to step d),
• d) reviewing the current position of the animal in relation to defined areas defined by at least two polygons with different properties in the form of Global Positioning System points,
• e) calculating distance of the current position of the animal to the nearest borderline of the polygons,
• f) determining whether the current position from step b) is within the polygons, wherein if the position in step b) is inside the polygons, set the system to the automatically-activated power saving mode and if the position from step b) is outside the polygons, the method proceeds to step g),
• g) determining whether the calculated distance in step e) is an amount which requires correction to be performed, and, if the distance is an amount which requires correction to be performed, proceed to step h);
• and, if the distance is an amount which does not require correction to be performed, return to step b),
• h) starting correction in a form of affecting the animal in the form of audio, wherein the audio frequency increases or decreases gradually according to the calculated distance to the polygons, and proceed to step i),
• i) determining whether the distance to the polygons increases, and if it is increasing, determining whether the audio frequency has reached a predetermined frequency level for electric shock, and if the predetermined level is reached, applying an electric shock to the animal and proceeding to step j);
• if the audio frequency is below the predetermined level, return to step h),
• j) calculating actual position and registering actual position as a new starting point for further correction, and proceed to step k),
• k) end correction and return to step b).