A method includes establishing a plurality of radio links between a plurality of mobile devices and a base station. Here, the plurality of mobile devices communicate with the base station via the plurality of radio links. The method may further comprise assigning each of the plurality of radio links a plurality of radio resources, selecting at least one radio link from the plurality of radio links based on priority levels that are set for the plurality of radio links, respectively, releasing at least one but not all of the plurality of radio resources from the selected radio link, and assigning at least one of the released radio resource to a new radio link which is established.