Research Of QoS Mechanism In Autonomic Network

IP network is becoming a public information transport platform which carries a variety of service activities, and provides services for many types of user groups, and its status is improving gradually. But as the development of network applications, its drawbacks are also becoming obvious, so there is an urgent need to improve it. Based on this requirement, the research of new network architecture design is carried out gradually. As one of the main direction of this study, autonomic communication has been receiving more and more attention. On the other hand, with the increasing types of network applications, the users' requirements on the quality of service are also improved. The best-effort service principle of traditional network can no longer meets users' needs of QoS. Thus, the study of QoS technologies which can automatically adapt to dynamic changes of environments and meet the special needs of different users, has becoming an important aspect in the study of future network technology.In this thesis, the QoS mechanisms in autonomic network have been deeply studied in accordance with the future development of autonomic network. Reference to the DiffServ model, for the purpose of implementing autonomic attributes, an autonomic QoS mechanism self-organization architecture is designed. This architecture can provide multiple mechanisms for the implementation of every basic step in DiffServ, and could realize different combinations of protocols automatically according to the context changes.Then, based on the deep study of marking mechanism in the autonomic QoS mechanism self-organization architecture, an autonomic marking algorithm using context aware named CAAM (Context Aware Autonomic Marker) is proposed, and its performance is proved by simulation.At last, the major work of this thesis is summarized, and the existent insufficiencies and future improvements are pointed out.