【作者】 邹宗惠；

【导师】 唐学文；

【作者基本信息】 重庆大学 ， 计算机系统结构， 2004， 硕士

【摘要】 随着IP宽带技术的发展和广泛应用,网络上多媒体信息和实时任务的数量与日俱增。Internet已逐步由单一的数据传送网络向数据、语音、图像和实时任务等多媒体信息的综合传输网络进化。但由于传统的Internet的传输模式仍为“尽力而为”(best-effort)型服务,没有提供面向多媒体和实时任务所要求的服务质量QoS(quality of service)保证技术,因此,如何提高IP网络的服务质量已成为目前研究领域的一个热点。在众多的IP QoS保证技术中,本文研究的重点是IP QoS测量技术。IP QoS测量是一个新的研究领域,它的目的是用测量手段取得网络的性能和服务质量参数,并且IP QoS测量是IP网络服务质量控制、管理、和计费的基础。本论文主要分为以下三个部分:第一部分系统地研究分析了IP QoS的概念及体系结构。第二部分中首先对IP QoS测量方法和测量工具进行了详细的分析,特别是主动式测量方法作了分析介绍。其次对现有的主动式协议ICMP、OWDP和最新的IPMP进行了研究分析,最后对IPMP进行了模拟实现。第三部分提出了DiffServ体系结构基于测量的动态QoS请求及接纳控制方案。该方案除了传统的边缘节点的模块控制机制外,还在端系统中的QoS协商模块中使用了主动测量技术,以实现QoS的动态自适应的请求。并针对端系统的QoS动态协商模块进行了模拟实验,验证了我们的预期结果。更多还原

【Abstract】 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. Among many IP quality of service (QoS) technology, this paper focuses on the measurement technology of Internet Protocol quality of service (QoS). The measurement of IP QoS is a new research field, and it aims to get some parameter of network performance and QoS by measurement, thereby the measurement of IP QoS is the basement of IP network control of QoS, management of QoS and account QoS. The whole paper includes three parts and is organized as follows: Part 1 We analyse systemically the concept and the architecture of IP QoS. Part 2 Firstly, we analyse amply all kinds of measurement methods and implements for IP QoS, especially emphasize active measurement method. Secondly, we evaluate many popular active measurement protocols such as ICMP (Internet Control Message Protocol), OWDP (One Way Delay Protocol) and lately IPMP (Internet Protocol Measurement Protocol). Finally, we use IPMP in the simulation experimentation. Part 3 We bring forward a based-measurement method of dynamic QoS Differentiated service (DiffServ) architecture for request and admission control .The method not only uses traditionally control module on edge node, but also adopts active measurement method in QoS negotiation module of end system. In order to realize dynamic and self-adaptation QoS request. Additionally, against the dynamic QoS negotiation module of the terminal system, we carry on a simulation experiment which validated our expected results.更多还原