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IP网络上多媒体业务的出现对IP环境中的服务质量(QoS)提出了更高的要求。目前,Internet远远不能提供企业所需要的且已经在其专用网络中习惯的可靠性和性能。商业客户在安全性、可预测性、可测量性等方面得到保证之前,还不大可能把关键业务的数据、语音和多媒体应用放到公用IP网络上。IP QoS就是在这种环境下应运而生的。 IP QoS是指IP数据流通过网络时的性能。它的目的就是向用户的业务提供端到端的服务质量保证。它有一套度量指标,包括业务可用性、延迟、可变延迟、吞吐量和丢包率。IP QoS在可预测、可测量性方面比传统IP有了很大提高,基本解决了商业用户的需求,因而势
The advent of multimedia services on IP networks places higher demands on Quality of Service (QoS) in the IP environment. Currently, the Internet is far from providing the reliability and performance businesses need and have become accustomed to in their private networks. Commercial customers are not likely to put critical business data, voice and multimedia applications on the public IP network until they are assured of security, predictability, scalability, and more. IP QoS came into being in this environment. IP QoS refers to the performance of IP data flow through the network. Its purpose is to provide end-to-end service quality assurance to users’ businesses. It has a set of metrics, including business availability, latency, variable latency, throughput, and packet loss rates. IP QoS is much more predictable and measurable than traditional IP and basically solves the needs of business users. Therefore, potential