Research On IPv6 QoS Control Mechanisms Based On Dynamic Packet State

With the development of Internet and emergence of new multimedia applications such as IP telephony, VOD and e-commerce, Internet has evolved into an integrated transport network with text, audio and video etc. the existing best-effort service provided by current Internet would be no longer sufficient. Nowadays, it is common to provide QoS control according to the users' requirement, which is also a challenge to the development of Internet. QoS control of the multimedia traffic as one of the key techniques in the next generation network is the hotspot of the current computer network research.Recently, the fair allocation of bandwidth come to front due to the wide use of P2P application such as BT, EDonkey and so on, this paper is just about this issue.To achieve this, this paper mainly focuses on two aspects: admission control and fair queuing algorithm. First, the distributed admission control architecture is designed in which local admission control algorithm is implemented by extending Dynamic Packet State technology. In this schema, only edge routers maintain the flow state while core routers just check its output rate to perform local admission control. A lightweight signaling is adopted in the domain to simplify the complexity, which enhances the scalability greatly. Secondly, Based on the CSFQ, a new fluid model is introduced and on which MCSFQ is designed. Simulations prove that MCSFQ not only applies to UDP flows but also be adaptive to TCP flows for fair bandwidth allocation.Lastly, an innovative routing binding mechanism is designed to assure the packets belonging to the same flow to be transferred along the same path, which avoids complex address match and can forward packets with high speed.