NetDNA: A middleware for seamless integration of devices, networks, and applications

将移动设备集成到分布式系统中需要允许这些设备与远程资源交互的功能，并允许远程服务访问设备导出的资源。作为一个应用场景，考虑在家庭中利用技术，使个人能够通过与一些技术设备的交互来照顾自己的健康，这些设备旨在帮助他们完成日常生活任务，并监测和控制他们的医疗状况。作为另一种应用场景，考虑无线传感器网络中的组件，它们需要合作，而不是竞争网络资源，以实现一个共同的目标，比如监控一座桥。在这两种情况下，我们都有一个具有挑战性的环境，其中应用程序必须设计得灵活、可互操作和可靠，并且它们必须无缝地协调设备，以所需的可靠性和服务质量完成所需的任务。这样的应用程序有一个独特的属性：它们必须是主动的，也就是说，当环境发生变化时，它们会积极地影响网络，而不是被动地响应变化的环境。使用现有的软件技术创建这样的应用程序是复杂的。

Integrating mobile devices into distributed systems requires functionality that allows these devices to interact with remote resources and allows remote services access the resources that devices export. As an application scenario consider the utilization of technology in homes to enable individuals to take care of their own health simply by interacting with several technological devices designed to assist them in daily living tasks as well as monitor and control their medical conditions. As another application scenario, consider the components in a wireless sensor network that need to cooperate, rather than compete for network resources, to accomplish a common goal such as monitoring a bridge. In both of these scenarios, we have a challenging environment in which applications must be designed to be flexible, interoperable, and dependable and they must seamlessly coordinate the devices to accomplish the required task with the required reliability and quality of service. Such applications have a unique property: they must be proactive in the sense that they would be actively affecting the network when the environment changes, rather than reactive, simply responding to the changing environment. Creating such applications is complex using existing software technologies.