METHOD OF TRANSMITTING AND RECEIVING INFORMATION

The invention relates to communication systems and can be used for transmitting information to emergency zones. The essence of the invention is that a receiving device obtains its coordinates from a satellite navigation system (for example, GPS) and uses the coordinate values (longitude and latitude) to generate its own personal activation code and format (information decoding algorithm) for receiving information on the relevant standard radio frequency. For the transmission of information to designated subscribers depending on their location, an emergency region and individual ares thereof to which information is to be transmitted are first chosen and demarcated, and then on the area of the chosen region a grid is generated, each cell of which has coordinates. After this, packets of information intended for the subscribers of the chosen area are generated. An information transmission activation code is attached to the start of the packet, said code being generated on the basis of the coordinates of each individual grid cell and being identical to the activation code of the receiving device of the subscriber. Thereafter, the packet of information is transmitted for all the grid cells from a ground station to one or more radio satellites, the operational range of which encompasses the territory of the emergency zone. The radio satellites transmit the packets of information on a standard radio frequency in a format based on the coordinate values of the receiving device. The receiving device is activated upon receipt of an activation code corresponding to the personal activation code generated thereby, and starts to receive and record information transmitted in the respective format. The data may be of any type, for example text, audio, video, or graphics, etc. L'invention concerne des systèmes de communications et peut s'utiliser pour la transmission d'informations dans des zones de situations d'urgence. Selon l'invention, un dispositif de réception reçoit ses coordonnées à partir d'un système de navigation par satellite (par exemple, un système GPS) et, en utilisant les valeurs de coordonnées (longitude et latitude), forme son code d'activation personnel d'activation et un format de réception d'informations (un algorithme de décodage d'informations) à une fréquence de radiodiffusion correspondante. Pour transmettre les informations à leurs abonnés désignés en fonction de leur position on sélectionne et on délimite d'abord une région de situations d'urgence