网络移动性支持关键技术研究

发布时间：2018-03-18 19:11

本文选题：移动IPv6　切入点：网络移动　出处：《东南大学》2016年博士论文　论文类型：学位论文

【摘要】：网络移动技术虽然可以为多个节点组成的子网在移动过程提供持续的网络连接,但现有的网络移动基本支持协议仍然面临嵌套移动网络路由优化问题、移动路由器单点失效和性能瓶颈问题,以及网络移动过程中的切换性能问题,而已有的相关研究成果在全面性、兼容性和性能等方面仍然存在不足,这些问题严重影响了网络移动技术的广泛应用和进一步发展。针对上述问题,本文尝试从嵌套移动网络路由优化、移动网络多宿通信和网络移动过程中的无缝切换这三个方面着手研究网络移动技术,以提高移动网络的路由性能、可靠性和切换性能,并尽量与基本移动协议保持兼容。本文的主要工作包括如下三个方面：1、嵌套移动网络在扩大通信范围的同时会带来严重的路由优化问题。针对已有的路由优化方案在兼容性、可部署性和优化开销等方面的不足,提出一种新的嵌套移动网络路由优化方案NMNRO。 NMNRO通过扩展邻居发现协议,在嵌套移动网络内通告相同的外地网络前缀,并使用由该前缀配置的转交地址更新接入路由器的邻居缓存和移动路由器的路由表,然后配合对端注册来实现路由优化。该方案为嵌套移动网络提供了较为完整的路由优化方案,在降低优化开销的同时,具有较好的可部署性和兼容性。实验结果表明,NMNRO方案与同类优化方案相比具有较低的切换时延和较高的有效吞吐量,并且这些性能优势会随移动网络嵌套层数的增加而更加明显。2、针对移动网络中移动路由器易出现的单点失效和性能瓶颈问题,提出了一种适用于多路由器和多接口混合多宿场景的移动网络多宿方案MM-NEMO。 MM-NEMO通过定义移动路由器外部接口属性信息的维护和交换方法,使移动网络中所有外部接口的属性都以分布式的形式保存在每个移动路由器中,然后由移动路由器对网络内部节点的通信使用基于信息熵的多属性决策机制进行最佳接口的选择、分配或重定向。MM-NEMO同时适用于多路由器、多接口以及混合多宿场景,可以解决由多种原因引起的移动路由器单点失效问题。仿真结果表明,MM-NEMO可以综合多种接口属性和用户的主观需求进行接口的选择,使移动网络具有较高的吞吐量,并能实现负载均衡,解决了移动路由器性能瓶颈问题。3、针对移动网络的切换过程存在切换时延和丢包率较大的问题,提出一种移动网络无缝切换方案IF-NEMO. IF-NEMO着重优化快速切换机制中预先模式切换的信令流程,通过接入路由器来执行地址配置和预先注册等预先切换处理过程,以降低预先模式的预先切换时延,从而提高预先模式在网络快速移动时的成功率。IF-NEMO在保持较低切换时延的同时,显著降低预先切换时延和信令开销。实验结果表明,IF-NEMO在网络快速移动时仍然可以执行预先模式的切换过程,因而具有较好的切换性能。论文在上述三方面研究工作的基础上,按照网络移动过程的时间顺序设计了一个能同时为移动网络提供无缝切换、路由优化和多宿通信的整合方案O-NEMO。实验结果表明,O-NEMO可以在网络移动过程的不同阶段发挥作用,分别提高了移动网络的切换性能、路由性能和吞吐量,为移动网络提供了一个具有较好性能的网络移动技术优化方案。
[Abstract]:Although network mobile technology can be composed of multiple nodes in the sub network to provide continuous network connection in the mobile process, but the existing mobile network basic support protocol still face routing optimization problem of nested mobile network, mobile router to single point failure and performance bottleneck, switching performance and network in the process of moving, and the existing related research achievements in general, compatibility and performance are still insufficient, these problems have seriously affected the application and further development of mobile network technology. Aiming at the above problems, this article attempts from the nested mobile network routing optimization, seamless handoff of mobile network and mobile communication network more places in the process of the three aspects of mobile network technology in order to improve the performance of mobile network, routing and switching performance, reliability, and try to stay with the basic mobile protocol compatible. The main work includes three aspects as follows: 1. The nested mobile network will bring about severe route optimization problems while expanding the scope of communication. According to the existing routing optimization scheme in compatibility, lack of deployment and optimization overhead, and proposes a new nested mobile network routing optimization scheme of NMNRO. NMNRO by extending neighbor discovery the foreign network protocol, the same prefix announcement in nested mobile network, and by the use of the prefix configuration to the neighbor cache address update access router and the mobile router's routing table, and then with the end of registration to realize routing optimization. Provide a route optimization scheme complete the scheme for nested mobile networks, to reduce optimization overhead and can be deployed and compatibility. The experimental results show that compared to the NMNRO scheme with the similar optimization scheme has a low cut The effective throughput for delay and high performance, and these advantages will increase with the number of nested mobile network and more obvious.2, for single point prone mobile router in the mobile network failure and performance bottleneck problems, proposes a mobile network in multi router and interface hybrid multi homing scene multi homing scheme MM-NEMO. MM-NEMO through the maintenance of the mobile router interface definition and attribute information exchange method, the properties of all the external interface in a mobile network are distributed stored in each mobile router, then the mobile router communication of internal nodes of the network are the best interface for multiple attribute decision making mechanism based on information entropy selection, allocation or redirection.MM-NEMO is also suitable for multi router, multi interface and multi night scene, can solve the mobile road caused by a variety of reasons A single point of failure. The simulation results show that the subjective needs of MM-NEMO can be integrated a variety of interface attributes and user interface options, the mobile network has high throughput, and can achieve load balancing, solve the problem of mobile router performance bottleneck of.3, aiming at the switching process of mobile network problem handoff latency and packet loss this rate, signaling process of a mobile network IF-NEMO. IF-NEMO seamless handover scheme focuses on optimizing the switching mode of fast handoff mechanism in advance, to perform address configuration and pre registration pre handover process by means of access routers, in order to reduce the pre mode pre handover delay, so as to improve the success mode in the mobile network rapid advance rate in.IF-NEMO keep low handover delay at the same time, significantly reduce the pre handoff delay and signaling overhead. The experimental results show that in IF-NEMO The switching process can be executed in advance mode of fast mobile network, so it has better handover performance. This thesis based on the above three aspects, according to the time sequence of process design of a mobile network can provide seamless handover for mobile network, the integration scheme of O-NEMO. routing optimization and experimental results show that the multi host communication O-NEMO, can play a role in the different stages of the process of mobile network, which improves the handover performance of mobile network, routing performance and throughput, which provides a good performance of the mobile network technology optimization scheme for the mobile network.

【学位授予单位】：东南大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TN929.5

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