摘要： 提供服务质量保证是目前Internet的重要研究课题之一，其核心问题是实现不同业务流的分类转发。以区分服务模型的体系结构为基础，研究了“边到边” (edge-to-edge)服务质量保证问题，并从对单域转发行为的分析入手，着重研究了一种简单的“低尽力型”的单域转发行为(Lower Effort Per-Domain Behavior，LE-PDB)的实现及性能。最后，通过一个应用实例，研究了LE-PDB在保证“边到边”服务质量时的性能及实现。

关键词: 因特网, 服务质量, 区分服务模型, 单域转发行为(PDB)

Abstract: Providing quality of service (QoS) is one of the most important researches in the Internet at present. The key issue of QoS is to provide different services for different kinds of flows. Based on Differentiated service architecture, this paper focuses on the main ideas and approach of edge-to-edge quality of service. According to the analysis of the per-domain behavior, a simple PDBLower Effort PDB is studied. In conclusion, an application example is given to demonstrate its performances and feasibility in acquiring edge-to-edge quality of service.

中图分类号: 

• TP393.07