The thesis is focuses on the study and optimisation of a communication service, based on the deployment of a CubeSats constellation, capable to provide a continuous coverage of an area of interest, in the specific, Europe and to provide a stable communication in every point of the selected region by using small transportable antennas on ground. A market survey is performed and showed that in the communications market, the use of nano and/or microsatellites has had an exponential increase in the last two decades and is destined to grow in the future. Of particular interest of this thesis is the continuous coverage in order to assist the Civil Protection operations, in case of emergencies, which need an up to date satellite communication system.