CPS: Frontiers: Collaborative Research: ROSELINE: Enabling Robust, Secure and Efficient Knowledge of Time Across the System Stack

准确和可靠的时间知识对于传感、控制、性能以及计算和通信的节能集成的网络物理系统至关重要。这一声明是该提议的基础。新兴的CPS应用依赖于精确的时间知识来推断位置和控制通信。有多种语义用于描述时间，时间的质量随着我们在系统堆栈中的上下移动而变化。系统设计往往过度补偿这些不确定性，结果是系统可能过度设计，效率低下，脆弱。知识价值来自于新的和基本的时间概念和时间质量（QoT）的整体度量，该度量包括分辨率，准确性和稳定性。该提案构建了一个系统栈（“ROSELINE”），该系统栈使时钟硬件、操作系统、网络服务和应用能够以新的方式学习、维护和交换关于时间的信息，影响组件行为，并鲁棒地适应动态QoT要求以及操作条件的良性和对抗性变化。将受益于时间质量的应用领域将包括：智能格拉德，航空航天系统的网络化和协调控制，水下传感和工业自动化。该提案的更广泛影响是由于工作的基础性质，它建立了一个强大的和可调的时间质量，可以应用于广泛的应用，渗透到现代生活中。该提案还将为研究生，本科生和K-12教室整合研究和教育提供宝贵的机会。将通过出版物、开放软件源代码和参与诸如洛杉矶计算圈等活动进行广泛的宣传。

Accurate and reliable knowledge of time is fundamental to cyber-physical systems for sensing, control, performance, and energy efficient integration of computing and communications. This statement underlies the proposal. Emerging CPS applications depend on precise knowledge of time to infer location and control communication. There is a diversity of semantics used to describe time, and quality of time varies as we move up and down the system stack. System designs tend to overcompensate for these uncertainties and the result is systems that may be over designed, inefficient, and fragile.The intellectual merit derives from the new and fundamental concept of time and the holistic measure of quality of time (QoT) that captures metrics including resolution, accuracy, and stability. The proposal builds a system stack ("ROSELINE") that enables new ways for clock hardware, operating system, network services, and applications to learn, maintain and exchange information about time, influence component behavior, and robustly adapt to dynamic QoT requirements, as well as to benign and adversarial changes in operating conditions. Application areas that will benefit from Quality of Time will include: smart grad, networked and coordinated control of aerospace systems, underwater sensing, and industrial automation.The broader impact of the proposal is due to the foundational nature of the work which builds a robust and tunable quality of time that can be applied across a broad spectrum of applications that pervade modern life. The proposal will also provide valuable opportunities to integrate research and education in graduate, undergraduate, and K-12 classrooms. There will be extensive outreach through publications, open sourcing of software, and participation in activities such as the Los Angeles Computing Circle for pre-college students.