With the advent of the new class of radio telescopes such as LOw Frequency ARray (LOFAR) and the Square Kilometer Array (SKA) the necessity of using data mining procedures to handle the huge amount of data collected during their observations became essential. Software design having complete shift of methods is used to collect information in the radio frequency domain. Digital processing of signal is collected by simple Omni-directional antennas, which is connected to the software. This technique enables the collecting elements to be spread over an area of hundreds and thousands of square kilometres, in order to map the radio sky with high angular resolution. The large area network provides the infrastructure for sensor networks with applications in other fields. With the data transport requirements of Tbits/s and processing power needs of TFlops/s this new arrays represent a real challenge for computing and existing technology. This raised the interests and stimulated the discussion between scientists and engineers. Here we will provide an overview of the current radio astronomical facilities and those planned for the future to highlight their requirements and their performances.