In a non-limiting and exemplary embodiment, a method is provided for controlling co-existence of multiple radio access units. The method comprises: receiving a scheduling request comprising value information on at least some of radio independent scheduling parameters of a control interface common to a plurality of radio access units, scheduling radio access on the basis of the value information on at least some of the radio independent scheduling parameters, and sending a response to the scheduling request in a given form in accordance with the control interface common to the radio access units.