基于mSCTP-CMT的切换策略优化研究

发布时间：2018-07-10 18:40

本文选题：移动网络切换 + mSCTP-CMT　；参考：《东北大学》2014年硕士论文

【摘要】：随着社会的进步、科技的发展,互联网早已深入到人们日常生活的方方面面,成为人们生活中不可或缺的一部分。但是目前互联网面临着诸如扩展性、地址空间、端到端高性能传输、实时性和移动等方面的挑战。由于IPv4地址空间的局限性和下一代互联网对网络移动性更高的要求,IETF相继推出了如MIPv6、FMIPv6和HMIPv6的移动机制。因网络层的移动机制切换延迟大且网络结构复杂,于是传输层mSCTP移动机制便应运而生,其动态地址重置(Dynamic Address Reconfiguration, DAR)方案实现了移动用户通信不中断时的IP地址动态更新。基于mSCTP移动机制DAR的特点,相继提出了增强型动态地址重置EDAR,并建立传输层EDAR-FMIPv6移动机制。本文在深入研究了现有的移动机制,包括网络层移动机制,例如FMIPv6、HMIPv6移动机制,传输层移动机制,例如：mSCTP、EDAR-FMIPv6移动机制。在mSCTP移动机制引入多路径CMT机制的基础上分析研究并提出了对路径选择的优化方案。现有的移动机制在切换延迟、信令开销和传输速率等方面存在着不足,有的移动机制虽然改进了切换延迟等指标但是却增加了网络的复杂性。而mSCTP虽然引进了多路径同时传输机制CMT使得MN在不同网络间切换的延迟、信令开销和传输速率等方面有了很大的提升,但是该方案没有充分考虑切换后最优路径的问题。于是针对切换完成后最优路径问题本文提出了改进方案Pro_mSCTP-CMT。通过对仿真实验的结果分析可知,改进方案Pro_mSCTP-CMT不仅在切换时延方面较现有移动机制有一定的优势,还在数据路径吞吐量、数据传输速率方面均有一定的提升,从而验证了本文所提出的改进方案Pro mSCTP-CMT的合理性与先进性。论文最后对研究课题进行了总结和展望,提出了下一步的研究方向。
[Abstract]:With the progress of society and the development of science and technology, the Internet has already penetrated into every aspect of people's daily life and become an indispensable part of people's life. However, the Internet is facing challenges such as scalability, address space, end-to-end high performance transmission, real-time and mobile. Due to the limitations of IPv4 address space and the higher mobility requirements of the next generation Internet, IETF has introduced mobile mechanisms such as MIPv6FMIPv6 and HMIPv6 one after another. Because of the large handoff delay and complex network structure in the network layer, the transport layer mSCTP mobile mechanism emerges as the times require. Its dynamic Address Reconfiguration (dar) scheme realizes the IP address dynamic update when the mobile user's communication is not interrupted. Based on the characteristics of mSCTP mobile mechanism, enhanced dynamic address resetting (EDAR) is proposed one after another, and the transport layer EDAR-FMIPv6 mobile mechanism is established. In this paper, the existing mobility mechanisms, such as FMIPv6, HMIPv6, and transport layer, such as: MSCTPEDAR-FMIPv6, are studied in detail. Based on the introduction of multi-path CMT mechanism into mSCTP mobile mechanism, the optimization scheme of path selection is proposed. The existing mobility mechanisms are deficient in handoff delay, signaling overhead and transmission rate. Some mobile mechanisms improve the handoff delay, but increase the complexity of the network. Although the multi-path simultaneous transmission mechanism (CMT) is introduced into mSCTP, the delay, signaling overhead and transmission rate of handoff between different networks are greatly improved, but the problem of optimal path after handoff is not fully considered in this scheme. In this paper, an improved scheme PromSCTP-CMT is proposed to solve the optimal path problem after handoff. By analyzing the simulation results, it can be seen that the improved scheme PromSCTP-CMT not only has some advantages over the existing mobile mechanism in handoff delay, but also has a certain improvement in data path throughput and data transmission rate. Therefore, the rationality and advanced nature of the improved scheme Pro mSCTP-CMT proposed in this paper are verified. At the end of the paper, the research topics are summarized and prospected, and the next research direction is put forward.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.04

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