随着下一代网络(NGN)技术的逐步应用,电信运营商拥有了能够同时提供传统的电信级语音业务和基于IP的多媒体业务的统一平台。如何确保这个平台稳定运行,保障不同类型客户的通信质量,成为一个系统性的问题。针对NGN的网络体系结构和业务特点,从系统的角度出发,探讨了NGN建设中QoS(服务质量)保障的策略,从而实现网络上各类业务在端到端上的QoS保障 With the gradual application of next generation network (NGN) technology, telecom operators have a unified platform capable of providing both traditional carrier-grade voice services and IP-based multimedia services. How to ensure the stable operation of this platform and ensure the communication quality among different types of customers has become a systemic problem. According to the network architecture and service characteristics of NGN, from the perspective of system, the strategy of QoS (Quality of Service) guarantee in NGN construction is discussed, so as to realize the end-to-end QoS guarantee of various services on the network