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We designed a specific router which can provide the required level of QoS over NGN(Next Generation Network) in this paper. We called this router 'QoSAware router', which consists of two parts, a classbased routing part and a flow-based routing part. QoS-Aware router enables data taking broad bandwidth or requiring high-level QoS to be processed immediately and not to be affected by other services. We assigned new service types to the flow label field of IPv6 header so as to provide differentiated services according to the packet type. Also, we adopted NGN QoS Architecture to apply resource management and to get user's information. By doing this, we designed a distinguishing mechanism in order to adapt to NGN that concentrates upon QoS. We built a simulation model using OMNeT++, and could verify the performance of QoS-Aware router supporting QoS based on subscriber and service levels, and resource management.

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Next Generation Network (NGN) is a broadband network that guarantees the quality of data transfers, independent of the lower transfer media, as real-time broadcasting services that are featured as a key service of the NGN require the multicast technique. Nevertheless, the existing IP multicast contains many limitations of application. Overlay multicast IP, an alternative to IP multicast, is a network studied widely for its ability to offer effective multimedia multicast transfers through flexibility and scalability. In this paper, we designed an agent for the destination network of each receiver and a manager that manages the entire overlay multicast topology for the source network where the media server is located. The manager and agent communicate with each other to assume the role of providing services based on network resource status. In this way, we can create a multicast environment that guarantees QoS in the NGN environment, which will be based on RACF (Resource and Admission Control Functions).