Research And Implementation Of IPv6 Flow Label In Multicast Management System

With the development of research and building"the Next Generation Network (NGN)"carried by many countries, people begin to enter the third Generation Network (3G) era. Constructing"the Next Generation Internet (NGI)"is the beginning of this era. IPv6 can bring us more favorites such as large address space, more security and reliability, efficient mobile mechanism and flow QoS support mechanism. IPv6 will be used as a fundamental packet transport protocol in new Network.Meanwhile more and more applications based on multicast appear on internet and begin to become a commercial service. Multicast is a one to many and many to many communication model and multicast address can be used to identify a group hosts in the internet. Compared with unicast, multicast can apparently save on bandwidth and can greatly lighten the process burden on network server. So it is very suitable to transport real-time media stream which has high bandwidth requirement on multicast technology.This thesis is focused on implement real-time media stream transported in IPv6 multicast and gives us a multicast communication model towards commercial operation. As described in previous of this abstract multicast is mainly used to transport real-time media stream which is require strict quality of service (QoS) assurance. IPv6 protocol defines flow label field which can identify a flow and provide more flow QoS characteristics in network, all these can help network assure flow QoS more efficient. How to use the flow label to give more efficient QoS assurance is still in discussing. This thesis introduces IPv6 flow label characteristics and usage requirements. This thesis also gives all methods about IPv6 flow label usage mentioned in IETF and their advantage and disadvantage. Then the security of flow label is analyzed in this paper. Based on all the analysis of flow label usage, this thesis gives an IPv6 flow label usage model which includes flow label user identification, flow characteristics configuration, flow label centralized management, flow label life time maintenance.It is important and necessary for multicast commercial operation to measure and monitor multicast user performance. There is few mature multicast user performance measurement system in IPv4 and IPv6 network. This thesis analyzes the importance and difficulty of multicast user performance monitor. Real Time Transport Protocol (RTP) is also introduced in this thesis. Then a strategy of multicast user performance monitor based on RTP multicast transport is discussed in this thesis. This strategy is including user performance calculation with RTP protocol, time synchronization, distributed monitor packet collection, global RTP SSRC management, collect agent information transport with RTCP packet and agent self-discovering in multicast user, buffer management mechanism, multicast user activity detection based on buffer management.After the multicast user performance monitor, the necessary step is whole multicast performance evaluation. How to map the whole multicast performance used end to end measurement performance is still an untouched field. This thesis builds the multicast performance evaluation model system based on fuzzy evaluation model. The evaluation factor of target system is presented and the weight of system evaluation index is found up with AHP arithmetic. Theevaluation function is established on triangle fuzzy set which can be used to establish the fuzzy evaluation matrix.Combined all part mentioned above, the architecture of multicast management platform is established. This thesis gives all function model design and implementation flow of the architecture. This thesis shows system test datum and analyses the datum.The conclusion of the whole work of this thesis is shown at last.