Network virtualization: The missing piece. Intelligence in Next Generation Networks, 2009. ICIN 2009. 13th International Conference on, 1-6, 2009. [PUMA: Resource_management Network_Virtualization messaging Real-time_service_support transport Service_oriented_architecture message_exchange Oriented integrated_networking service_requirements Content service Virtualization support real-time_systems Platform Platform_virtualization Context-aware_services Context-aware network Resource_virtualization systems real-time Network computing network_virtualization electronic virtualization Service services Resource message quality interactive_real-time_services Cloud_computing transport_layer management virtualized quality_of_service Content_management electronic_messaging exchange requirements Real-time telecommunication_network_management telecommunication interactive networking integrated layer Quality_of_service virtualized_service_platform connectivity Quality Infrastructure network_connectivity architecture]