中文摘要：

UMTS将为未来的信息系统提供业务平台．整个通信界都支持这一发展趋势。技术将不再被看作是问题．而是被看作是业务创新、业务多样化和业务区分的驱动力，UMTS将代表当前大多数移动网络基础设施自然演进的趋势。本文首先给出了UMTS中的服务质量（QoS）种类（即会话类．流类、交互类和背景类），研究了每种服务质量（QoS）类型的UMTS业务和无线接入承载业务属性．最后对每种承载流量类型的UMTS和无线接入承载属性进行了对比。

英文摘要：

UMTS will progress into the service platform for future information systems; the whole communication industry is behind it. Technology will no longer be perceived as an issue but as the driver for innovation and service variety and differentiation. UMTS will stand as the natural evolution of a majority of today＇s mobile network infrastructures. This paper presents the UMTS QoS classes, i.e. conversational class, streaming class, interactive class and background class, and describes the UMTS and radio-access bearer service attributes of each QoS class. In conclusion, we compare the UMTS and radio access bearer attributes of each bearer traffic class.