ITR: Supporting Adaptable Pervasive Computing Through a Kernel-Middleware eXchange

移动的计算基础设施的快速扩展保证了对互联网的无处不在的访问。 然而，这种环境的动态（无线网络上的可变条件，随着用户在无线域之间漫游而改变的安全策略，以及取决于电池寿命的计算优先级）在移动的系统的软件基础设施的设计中提出了重大挑战。 解决这个问题的一种方法是在应用程序和底层传输服务之间引入一层自适应中间件。 虽然中间件的传统作用是将应用程序组件与平台变化隔离，但自适应中间件层应该利用平台操作系统提供的服务来增强功能和性能。 本计画研究适应性中间件与作业系统核心之间的互动。 具体来说，该项目关注的问题是：操作系统应该提供什么服务和接口来使自适应中间件能够更好地满足移动的计算应用程序的需求？ 要测试的关键假设是这种关系是双向的：某些中间件功能在被推入内核时更有效，而某些内核操作在与中间件级信息结合时更有效。 Kernel-Middleware eXchange（KMX）项目建立在这样的想法之上，即与其将底层中间件视为“操作系统抽象层”，还需要研究中间件的这一部分如何与操作系统积极合作，以便为应用程序提供任何一部分都无法单独提供的支持功能。 该项目调查了三个交叉问题：无线网络上多媒体通信的服务质量;增强移动的设备安全性的措施，包括自适应审计和数据包过滤;通过数据转换、自适应进程调度和网络接口卡使用管理来管理电池寿命。

McKinleyThe rapid expansion of mobile computing infrastructure promises ubiquitous access to the Internet. However, the dynamics of this environment (variable conditions on wireless networks, changing security policies as users roam among wireless domains, and computing priorities that depend on battery life) pose a significant challenge in the design of software infrastructure for mobile systems. One approach to this problem is to introduce a layer of adaptive middleware between applications and underlying transport services. While a traditional role of middleware is to insulate application components from platform variations, an adaptive middleware layer should exploit services provided by the platform operating system to enhance functionality and performance. This project investigates the interaction between adaptive middleware and the operating system kernel. Specifically, the project focuses on the question: What services and interfaces should the operating system provide to enable adaptive middleware to better meet the needs of mobile computing applications? The key hypothesis to be tested is that this relationship is bidirectional: certain middleware functionality is more effective when pushed into the kernel, and certain kernel operations are more effective when combined with middleware-level information. The Kernel-Middleware eXchange (KMX) project builds on the idea that, instead of viewing lower-level middleware as an "operating system abstraction layer," it is also necessary to investigate how this part of the middleware might actively cooperate with the operating system in order to provide applications with supporting functionality that neither part could provide by itself. The project investigates three cross-cutting concerns: quality-of-service of multimedia communication on wireless networks; measures to enhance the security of mobile devices, including adaptive auditing and packet filtering; and managing battery lifetime through data transformations, adaptive process scheduling, and management of network interface card usage.