Research On Implement Of Quality Of Service On IP Networks For Supporting Audio Services

With the development of Internet protocol (IP) broadband technology, a lot of multimedia information and real tasks in Internet steadily increases. Contrast to network formerly only for transmitting data, Internet is becoming a integrated services network for multimedia such as data, sound, image and real task etc. However, because the pattern of traditional network is so-called "Best effort services" and isn't able to provide technology guarantee for the quality of service (QoS) which is requested by multimedia and real task, how to develop the QoS of IP network has become a hotspot in network research field.This paper focuses on the implement of Internet Protocol quality of service based on certain packet switch processor in a layer 3 switch.The whole paper includes four parts and is organized as follows:Part 1 We analyse the features of audio services in internet.The internet have to meet the requirements about Jitter,dalay,loss,bit error ,etc. for supporting audio servicesPart 2 We analyse systemically the concept and the architecture of IP QoS.Part 3 we analyse all kinds of Technical means in the Differentiated Services architecture, including traffic classification, traffic limit, traffic shaping, Priority Mark, congestion avoidance, congestion management, redirection, traffic mirror .traffic statistics.Part 4 we research the implement of IP QoS in layer 3 switch based on a certain packet switch processor.