Context-aware Mobile Internet Architecture

我们的研究目标是为不久的将来开发一个无缝的移动联网平台，在这个环境中，各种海量的内容和计算资源分布在各处，它们通过多种类型的无线和有线链路通过互联网连接起来。在这种环境下，虽然有可能提供创新的应用和服务，但由于目前关于移动互联网的技术和研究主要集中在终端移动性，保持移动终端与互联网的连接，因此还没有灵活使用这些资源的框架，例如根据用户的上下文选择最佳资源和动态切换资源。为了开发上述平台，首先设计了会话层移动性支持机制。它使我们能够在已经开始沟通的情况下无缝地切换资源。该机制引入了会话层标识，而不是目前流行的终端移动性所采用的网络层标识。除了对移动性的支持，我们还开发了一个系统，可以从各种信息中推测用户的上下文。该系统由无线链路质量监测工具、在线状态合成工具和室内位置测量工具组成。最后，我们将这两个系统结合在同一个实验床网络上，对我们的情景感知无缝移动网络平台进行了评估，并展示了它的效率和实用性。

Our research target is to develop a seamless mobile networking platform for the near future environment in which various and huge amount of contents and computing resources are distributed everywhere and they are connected via the Internet through many types of wireless and wired links. In this environment, although there are potential ability to provide innovative applications and services, there are no framework for use these resources flexible, such as choosing the best resources and switching the resources dynamically according to users' context, because the current technologies and researches about mobile Internet is focusing on terminal mobility, keeping connectivity of mobile terminal to the Internet. In order to develop the above platform, first, we designed session layer mobility support mechanism. It enables us to switch the resources seamlessly even when we have already started communication. This mechanism introduces session layer identifiers instead of network layer identifier that is adopted in popular terminal mobility. In addition to the mobility support, we developed a system that can suppose user's context from various kind of information. The developed system consists of wireless link quality watching tool, presence composition tool, and indoor location measurement tool. Finally, we combined these two systems together on the same test-bed network, evaluated our context-aware seamless mobile networking platform, and showed the efficiency and usefulness of it.