Embodiments of the present invention disclose a method for allocating communication resources for communicating data in a terrestrial wireless communication system including a first set of radio transmitters, at least part of said radio transmitters being used by a coordination entity, and the method comprises: sending an inquiry from said coordination entity, requesting a representation of communication resources available for allocation in each of at least a subset of said first set of radio transmitters, said subset being used by said coordination entity; obtaining a response to said inquiry, said response comprising a representation of available communication resources of said subset of radio transmitters; and based on said response, allocating communication resources from said first subset of radio transmitters. Embodiments of the present invention also disclose a communication system and a radio transmitter.