【作者】 廖佩贞；

【导师】 张惠民；

【作者基本信息】 北京邮电大学 ， 信号与信息处理， 2008， 硕士

【摘要】 移动通信技术的迅猛发展,实时业务被引入到移动网络环境下,从而对移动网络环境下的服务质量(QoS)保证提出了新的要求,如何在移动IPv6网络中提供QoS保证是目前研究的热点。现有的移动IPv6环境下QoS解决方案大都是基于RSVP协议的,但鉴于RSVP在安全性、灵活性和扩展性等方面面临着诸多问题,本论文引入了下一代网络信令协议——NSIS。NSIS根据模块化的要求将信令协议分成了两层:信令传输层(NTLP)和信令应用层(NSLP),这种体系结构在很大程度上决定了NSIS的灵活性和可扩展性。本文首先详细介绍了NSIS的两层信令体系结构,回顾了现有的IP QoS体系方案,在此基础上全面分析了下一代网络信令体系中在移动IPv6环境下QoS NSLP可能面临的各个方面的问题,创造性地提出了对应的端到端的解决方案,文章在最后用较大的篇幅介绍了基于NS2平台的QoS NSLP的仿真软件的设计和实现。本文的创新点在于提出了一种移动IPv6环境下,QoS NSLP如何在切换前后平滑过渡的端到端的解决方案。解决了在移动切换后在新路径上尽快地建立新的QoS NSLP状态,在旧路径上拆除旧状态的问题。主要思想是通过在移动IP绑定更新信令建立的同时,进行QoS NSLP信令状态的建立,这样节省了移动切换事件后等待移动IP信令建立QoS重新建立的延时,有效地避免了在这段时间内由于没有QoS保证所引起的QoS降级。更多还原

【Abstract】 With the rapid development of mobile communication technology, real-time services are applying in mobile environment. There are new requirements of QoS (Quality of Service) guarantee in mobile environment. How to provide QoS guarantee in the Mobile IPv6 network is becoming a hot topic.The existing solutions of QoS in Mobile IPv6 are almost based on RSVP. However, there’re many unsolvable problems such as security, flexibility, scalability in RSVP. In this paper we introduce Next Step inSignaling------NSIS. According to the modular requirement, NSISprotocol suite is structured in two layers: signaling transport layer(NTLP) and signaling application layer(NSLP). And the layered architecture determines the flexibility and scalability of NSIS.This paper firstly gives a detail introduction of the two layers’ architecture of Next Step In Signaling, describes the existed solutions of IP QoS architecture. And then it analyzes the possible problems Next Step In signaling would face in mobile IPv6 environment and proposes an end-to-end solution for it. At the end of the paper, a software design and implementation of QoS NSLP based on NS2 simulation platform is given.In this paper, we propose an end-to-end QoS provisioning mechanism based on NSIS (Next Step In Signaling) protocol suite in mobile IPv6 environment. Resource reservation on the new path must be done as quickly as possible after handover event for the Mobile Node (MN) which is especially important when real-time applications are used. We focus on end-to-end procedure for a fast QoS re-establishment, the basic idea of which is to reduce the time between the handover event and NSIS state re-establishment on the new path. It is designed to send the NSIS signaling message together with Binding Update (BU)/Binding Acknowledgement (BA) after handover, in order to avoid wasting time to wait for mobility detecting.更多还原