An apparatus, method, system and computer program product provide control channel coordination in heterogeneous networks. Parameters are provided indicating the availability of resources, wherein a resource is defined as an available radio frequency per time interval, and parameters indicate configuration of a physical channel configured for downlink control, for a physical control channel configured for format indication, and for a physical channel configured for HARQ indication, for use in both of two different communication cells providing radio communication services for terminals located therein. Further, a first resource allocation set and a second resource allocation set are determined, wherein determinations of the first resource allocation set and the second resource allocation set are made to be as mutually disjoint in resource allocation as possible in consideration of the parameters.