| Summary: | 碩士 === 國立中央大學 === 資訊工程研究所 === 92 === The future of the internet will be in heterogeneous networks, in its implementation and application. The different network characteristics of access networks i.e. the size of the bandwidth is a factor that the quality of service (QoS) is dependent on, and will affect it in different types of access networks, hence the application of heterogeneous networks will enable users to be able to receive a guaranteed QoS at anytime and any place. In recent years the growth of internet based communicative applications have grown exponentially, applications such as NetMeeting have a high demand in bandwidth quality, the implementation of multicast and its characteristics of being able to send 1 to multiple sources and many to many is a excellent tool to increase the quality of the NetMeeting experience and increasing bandwidth efficiency.
With multicast increasing bandwidth efficiency by decreasing bandwidth demand of net communicative applications, the real time characteristics of internet multimedia will require a system to guarantee its minimum quality service. In respect to future heterogeneous networks, the differentiated service (DiffServ) provided by IETF is just the service that will provide heterogeneous networks with scalability and at the same time provide a suitable quality of service. My thesis suggests the implementation of System for selecting access networks with QoS-Aware IPv6 multicasting (SSANQIM for short) which will increase the quality of service. This system uses the concept of the DiffServ Domain, which from different networks the bandwidth broker (BB for short) will communicate and determine the current bandwidth usage of the different networks, and based on this data 4 different types of SSANQIM will be suggested, which will help the user determine which network will be the most suitable for use, and can also guarantee the quality of service.
According the results of experiments，the QoS framework of SSANQIM can provide multicast with QoS support, and four proposed network selection policies can help users who want to get multicast service to select suitable networks with QoS support.
|
|---|
