 Next Generation Network (NGN) is a packet-switched access network capable of providing telecommunication services through use of multiple broadband, QoS-enabled transport technologies where service-related functions are independent of underlying transport-related technologies. It offers unrestricted access by users to different service providers. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users [16]. Table 1-1 IMT-Advanced Service Classification Requirements [11] Service Parameters Experience Service (Numerical Class Description Class Values) Example Services [12] Conversational The basic conversational service class Basic Throughput Voice telephony (including VoIP) comprises basic services that are conversational Emergency calling dominated by voice communication service Delay 50 ms Push-to-talk characteristics. The rich conversational Throughput Video conference service class consists of services that conversational mainly provide synchronous High-quality video telephony service communication enhanced by additional Delay 20 ms Remote collaboration media such as video, collaborative e-Education (e.g., video call to document viewing, etc. Conversational teacher) low delay class comprises real-time Consultation (e.g., video services that have very strict delay and interaction with doctor) Mobile commerce delay jitter requirements. Conversational Throughput Interactive gaming low delay Consultation Delay 10 ms Priority service Streaming The differentiating factor of these Streaming live Throughput Emergency calling service classes is the live or non-live Public alerting nature of the content transmitted. In Delay e-Education (e.g., remote case of live content, buffering lecture) possibilities are very limited, which Consultation (e.g., remote makes the service very delay-sensitive. monitoring) In the case of non-live (i.e., pre- Machine-to-machine (e.g., recorded) content, play-out buffers at surveillance) the receiver side provide a high Mobile broadcastin