一种基于本地QoS类别的端到端的QoS路由方法

End-to-End QoS Routing Method Based on Local QoS Classes

传统的全局QoS路由需要获知精确的全局网络QoS状态。由于不可忽略的传播延时和处理开销,节点所获得的QoS信息总是不精确的。通过将全局网络划分为多个小的网络子域,并定义每个网络子域的本地QoS类别,将全局的端到端QoS路由转化为分层的路由问题,给出了一个可扩展性的路由算法。

Traditional global QoS routing algorithms require precise global network QoS states. Due to non-negligible propagation delay and dynamic processing overhead, it is difficult for nodes to maintain the precise global QoS information. Dividing the global network into several sub-networks and defining the local QoS classes for each of these sub-networks, is the global end-to-end QoS routing transfered into a hierarchical routing issue, and then proposed a scalable routing algorithm.