In one embodiment, a method for mobile network function virtualization includes creating an evolved packet core cluster and associating a sub-network with the EPC cluster. The message is constituted by a plurality of distinct information blocks of which certain may be destined for different nodes. The invention may also operate outside the defined boundaries by extrapolating the theoretical relationships beyond the defined boundary. In one implementation, presentation of a media group can involve not only presentation of media items of the media group but also presentation of auxiliary media.