泛在移动接入的连接管理研究与实现

发布时间：2018-04-05 16:07

本文选题：连接管理　切入点：接入选择　出处：《北京邮电大学》2014年硕士论文

【摘要】：随着网络技术的飞速发展,异构网络不断融合,用户终端普遍处在一个存在多个网络接入的环境中,可以利用终端配备的多个物理接口,同时接入多个网络,建立多条网络连接,进行业务传输。在泛在移动接入网络环境中,当用户终端保持多个连接,业务流的接入选择和业务流在连接之间的迁移是关键问题。SDN技术的出现为未来网络的发展提供了新的思路,也能够给网络研究人员提供灵活真实的实验平台。将SDN中的OpenFlow技术应用于移动接入的连接管理中,通过扩展OpenFlow协议封装与解析数据包的处理机制,利用控制与转发分离架构所提供的开放API开发控制程序,可以进行灵活的连接管理,是解决业务流接入选择和业务流迁移问题的一种行之有效的方法。本文首先介绍了泛在移动接入的连接管理基本概念、场景以及研究进展,接着介绍了SDN基本概念以及技术原理。随后,深入分析研究OpenFlow技术在连接管理中的应用,以典型的连接管理场景为基础,分析用户终端使用多连接传输混合业务流时的接入选择问题,以及用户终端切换连接导致业务流迁移时保持会话连续性和保证业务服务质量的需求,基于OpenFlow技术设计实现一个连接管理系统,包括可编程终端、转发子系统、控制子系统和管理子系统,在系统中通过一种扩展OpenFlow协议数据包封装与解析的双层IP方法,配合连接管理控制程序,实现多连接定向选择、动态业务流迁移、自适应流量整合三个主要功能,以初步解决用户终端业务流接入选择和业务流迁移的问题。最后,搭建OpenFlow试验平台验证了上述三个主要功能。
[Abstract]:With the rapid development of network technology and the continuous integration of heterogeneous networks, user terminals are generally in a multi-network access environment, can use the terminals equipped with multiple physical interfaces, access to multiple networks at the same time,Establish multiple network connections for service transmission.In the ubiquitous mobile access network environment, when user terminals maintain multiple connections, the access selection of traffic flow and the migration of traffic flows between connections are the key issues. The emergence of SDN technology provides a new way of thinking for the future network development.It can also provide a flexible and real experimental platform for network researchers.The OpenFlow technology in SDN is applied to the connection management of mobile access. By extending the processing mechanism of encapsulating and parsing data packets in OpenFlow protocol, the control program is developed by using the open API provided by the separate control and forwarding architecture.Flexible connection management is an effective method to solve the problem of traffic access selection and traffic migration.This paper first introduces the basic concepts, scenarios and research progress of connection management in ubiquitous mobile access, and then introduces the basic concepts and technical principles of SDN.Then, the application of OpenFlow technology in connection management is deeply analyzed. Based on the typical connection management scenario, the problem of access selection when user terminal uses multi-connection to transmit mixed traffic is analyzed.As well as the need to maintain session continuity and guarantee service quality when user terminal switching connection leads to business flow migration, a connection management system based on OpenFlow technology is designed and implemented, which includes programmable terminal, forwarding subsystem, and so on.In the system, the control subsystem and the management subsystem adopt a two-layer IP method which extends the encapsulation and parsing of the OpenFlow protocol data packet, cooperates with the connection management control program, realizes the multi-connection orientation selection and the dynamic traffic flow migration.Adaptive traffic integrates three main functions to solve the problems of user terminal traffic access selection and traffic flow migration.Finally, the OpenFlow test platform is built to verify the above three main functions.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02

【共引文献】