The invention proposes controlling a media session involving a plurality of media streams within a communications network, wherein the communications network comprises a media resource node (106) and a media control node controlling (102) the media resource node, wherein the media control node performs a method of determining that selected media streams out of the plurality of media streams are associated to each other in a media session, transmitting to the media resource node (106) an instruction to group the selected media streams of the media session, and transmitting to the media resource node (106) an instruction to prepare for performing an action with respect to the selected media streams. The invention further proposes a corresponding method to be performed in a media resource node (106), corresponding nodes (102, 106) and corresponding computer programs.