Research of a Mobility Support Network Architecture for Ubiquitous Broadband Environments

本研究的目的是为即时串流等宽频通讯提出一种移动性支援网路架构。该体系结构不仅支持移动节点，而且支持连接多个节点的移动网络。我们得到了以下结果。(1)移动网络协议的设计与开发我们提出了针对移动节点的IP移动性支持架构MAT （mobile IP with Address Translation）。我们扩展了移动网络的MAT。所提议的架构允许移动网络连接(i)遗留节点（非MAT节点）、（ii）移动节点（MAT节点）和（iii）移动网络。(2)原型系统的实现我们在PC机的UNIX （Linux）操作系统上实现了所提出的网络架构的原型系统。我们已经确认该系统在宽带环境下运行良好。原型系统能够以30Mbps的速度在不同的网络之间切换传输高清电视图像数据。(3)实验和演示所提出的体系结构使用多个IMS （IP地址映射服务器）来提高可靠性，IMS管理相应移动节点和/或网络的当前网络地址。我们利用原型系统在JGN2试验台网络上验证了该机理。我们还在各种研讨会的展览中展示了原型系统。

Purpose of this research is to propose a mobility support network architecture for broadband communications such as real-time streaming. The architecture includes supporting not only mobile nodes but also mobile networks connecting many nodes. We obtained the following results.(1) Design and development of protocols for mobile networksWe had proposed IP mobility support architecture MAT (Mobile IP with Address Translation) for mobile nodes. We extended the MAT for mobile networks. The proposed architecture allows mobile networks connecting (i) legacy nodes (non-MAT nodes), (ii) mobile nodes (MAT nodes), and (iii) mobile networks.(2) Implementation of a prototype systemWe implemented a prototype system of the proposed network architecture on PC UNIX (Linux) operating system. We have confirmed that the system works well in a broadband environment. The prototype system was able to handover between different networks transferring HDTV picture data about 30Mbps.(3) Experimentation and demonstrationThe proposed architecture increases reliability using multiple IMS's (IP Address Mapping Servers) which manage current network addresses of the corresponding mobile nodes and/or networks. We verified the mechanism using the prototype system on the test bed network JGN2. We also demonstrated the prototype system at exhibition of various symposiums.