IP骨干网中的服务质量管理

由于需要服务质量(QoS)保证的应用迅速增加，IP网络开始以一种有效的方式提供QoS管理。在IP主干网上提供QoS的关键在于好的网络设计，即简单、有效并且能提供流量保护。它不仅使网络更加健壮，而且能防止许多QoS问题的出现。文章在分析IP主干网上的QoS问题及相关控制机制的基础上，给出了一种在IP主干网上提供QoS的实施方法，该方法将主要的QoS控制功能置于端节点并采用动态的流控机制，这样既可减轻网络内部节点的压力，又对网络的状态变化具有一定的自适应能力。

QoS Management in the IP Backbone

As applications requiring guaranteed QoS gain in importance, IP networks have begun to provide QoS management in an effective manner. Good network design, simplicity, high availability, and traffic protection are the keys for providing QoS in the IP backbone. It makes a network more robust against failure and prevents many QoS-related problems from happening. This article analyzes the QoS-related problems and QoS control mechanism in the IP backbone, and then describes a practical approach for providing QoS in the IP backbone. This approach puts the most QoS function at the end-node and makes use of dynamic flow-control mechanism in it. So the proposed approach has not only adaptation but enable the network simplicity.