一种基于DiffServ/RSVP的优化隧道机制

分析了DiffServ体系中四种聚集流的服务质量保证，给出了DiffServ在IPv4广域骨干网上不能实现QoS保证的原因。在此基础上，引进了接纳控制机制，即在DiffServ体系中引进了RSVP资源预留协议，探讨了基于Diffserv/RSVP体系的服务质量，得出节点路由表庞大的信息量对Diffserv/RSVP体系QoS保证有一定的影响，在制定了一种优化策略后，证明了基于Diffserv/RSVP体系的QoS是有保证的。从而得到一种具有QoS保证的隧道机制。
关 键 词 计算机网络; 区分服务; 资源预留协议; 隧道机制

Abstract The tunnel mechanism of IPv4 WAN backbone net based on DiffServ system is a primary solution to transit IPv6 from IPv4. The QoS guarantee supplied by this tunnel mechanism is analized. The reason why DiffServ fails to realize the QoS guarantee in IPv4 WAN backbone net is given. Then the controlled acceptance mechanism that RSVP is introduced in DiffServ systems is introduced, and the service quality based on Diffserv/RSVP is studied. The result shows that the huge information of route table of nodes still has certain side effect on the QoS guarantee in Diffserv/RSVP system and that QoS is guaranteed based on Diffserv/RSVP system.
Key words computer network ; Diffserv; resource reservation setup protocol; tunnel techniquem