The present invention aims to provide a hollow antenna tower structure for use in a wireless communications network. The tower comprises tubular tower sections made of concrete, and having a generally hollowed cross section. A movable base station unit, having at least one antenna and at least one micro wave link, is being disposed inside the tubular tower. The whole base station unit is movable up and down inside the tower by the aid of an elevator system. The tower further comprises at least one entrance into the tower and a climbing facility and/or a second elevator system, inside the tower, giving access to the base station unit.