An Algebraic Approach to Modeling and Verifying Policy-Driven Smart Devices in IoT Systems

X. Chi, Min Zhang, X. Xu
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Abstract

Internet of Things (IoT) is being widely adopted to facilitate living environments such as cities and homes to become smart. Devices in IoT systems are capable of automatically adjusting their behaviors according to the change of environments. The capability is usually driven by the policies which are predefined inside devices. Policies can be customized by end users. Inconsistencies or conflicts among policies may cause malfunction of systems and therefore must be eliminated before deployment. In this paper, we propose a novel algebraic approach to modeling and verifying policy-driven smart devices in IoT systems on the basis of a domain-specific modeling language called PobSAM (Policy-based Self-Adaptive Model) and an efficient rewriting system called Maude. We formalize the operational semantics of PobSAM using Maude, which is an executable specification as well as a formal verification tool. The Maude formalization can be used to verify smart devices that are specified in PobSAM. We conduct a case study on a smart home setting to evaluate the effectiveness and efficiency of our approach.
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物联网系统中策略驱动智能设备建模和验证的代数方法
物联网(IoT)正在被广泛应用,以促进城市和家庭等生活环境的智能化。物联网系统中的设备能够根据环境的变化自动调整自己的行为。该功能通常由设备内部预定义的策略驱动。最终用户可以自定义策略。策略之间的不一致或冲突可能会导致系统故障,因此在部署前必须消除。在本文中,我们提出了一种新的代数方法来建模和验证物联网系统中策略驱动的智能设备,该方法基于一种称为PobSAM(基于策略的自适应模型)的领域特定建模语言和一种称为Maude的高效重写系统。我们使用Maude形式化PobSAM的操作语义,Maude是一个可执行的规范,也是一个形式化的验证工具。Maude形式化可用于验证PobSAM中指定的智能设备。我们对智能家居设置进行了案例研究,以评估我们方法的有效性和效率。
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