天津未来小学校园网流量控制方案设计与实现

发布时间：2018-07-29 20:56

【摘要】：随着网络技术的发展和网络规模的增长,校园网上的新业务越来越多,而不同的网络应用对服务质量的需求有所不同。比如视频和语音对传输延迟的要求很高,而邮件等业务对时间延迟不敏感。传统网络协议对所有不同种类的业务只提供“尽力而为”的服务方式,这对于视频与语音等多媒体业务的支持远远不够。不同数据类型的应用对于通信条件的要求各不相同,为了保证多种业务的通信要求,引发了对校园网QoS(Quality of Service)的研究。本文首先深入分析了IETF (Internet Engineering Task Force)提出的三种QoS服务模型,即综合服务模型(Integrated Service, IntServ),区分服务模型(Different Service, DiffServ)和多标签协议交换服务模型(Multiple Protocol Label Switch, MPLS)。DiffServ提供因特网业务的区分服务,支持各种类型的应用程序与具体业务需求。考虑到DiffServ具有实现简单、灵活通用等优点,本文选择DiffServ作为QoS流量控制系统的体系结构。本系统针对未来小学校园网络中语音和视频等多种业务的特定应用,以开源的路由器操作系统OpenWRT中Linux内核中的流量控制(Traffic Control, TC)模块为基础,设计一套适合多业务的流量控制方案MSTC(Multiple Services Traffic Control)。本系统通过对Linux内核中的TC模块加以定制,将队列调度策略、分类、过滤器结合在一起,以满足不同业务的流量控制需要。本系统的测试实验数据表明,设计的MSTC系统较好实现了预期的流量控制,可为校园网用户提供可靠的服务质量。
[Abstract]:With the development of network technology and the growth of network scale, there are more and more new services on campus network. For example, video and voice require high transmission delay, while mail and other services are not sensitive to time delay. Traditional network protocols only provide "best effort" service for all kinds of services, which is far from enough for multimedia services such as video and voice. The application of different data types has different requirements for communication conditions. In order to ensure the communication requirements of various services, the research on campus network QoS (Quality of Service) has been initiated. In this paper, three kinds of QoS service models proposed by IETF (Internet Engineering Task Force), that is, (Integrated Service, IntServ), differentiated service model (Different Service, DiffServ) and multi-label protocol switching service model (Multiple Protocol Label Switch, MPLS). DiffServ), are analyzed in detail. Support various types of applications and specific business requirements. Considering that DiffServ has the advantages of simplicity, flexibility and generality, this paper chooses DiffServ as the architecture of QoS flow control system. This system is based on the traffic control (Traffic Control, TC) module in the Linux kernel of OpenWRT, the open source router operating system, aiming at the specific applications of voice and video services in the future primary school campus network. Design of a Multi-service flow Control Scheme MSTC (Multiple Services Traffic Control). By customizing the TC module in the Linux kernel, the system combines queue scheduling strategy, classification and filter to meet the traffic control needs of different services. The experimental data of the system show that the designed MSTC system can achieve the expected flow control and provide reliable quality of service for campus network users.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP393.06

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