The present invention relates to a method for synchronizing radio communication within a mobile radio communications network, wherein at least one mobile station receives information from at least one first radio network node (BSa6) serving radio cells (BSa6-N-h0, BSa6-SW-h0, BSa6-SE-h0) providing multicast communication and communicates with at least one second radio network node (BSa9) serving radio cells (BSa9-NE-h1) providing unicast communication. Information regarding multicast communication is transmitted from the at least one mobile station to the at least one second radio network node and the at least one first radio network node via at least one connection (Xm interfaces) established between said first and said second network node. The invention further relates to network entities performing the above mentioned method.