A Generic Framework For Capturing Reliability in Cyber Physical Systems

TL;DR

This paper introduces a comprehensive framework for modeling and analyzing the reliability of cyber-physical systems, addressing their critical need for dependability through a layered architecture and formal reliability models.

Contribution

It presents a novel generic reliability framework for CPS, formalizes the reliability model for its architecture, and demonstrates its applicability with real-world data.

Findings

The reliability model covers most reliability scenarios in CPS.

The framework effectively captures reliability across different system layers.

Demonstration with offshore and onshore data validates the model's applicability.

Abstract

Cyber Physical Systems solve complex problems through their tight integration between the physical and computational components. Therefore, the reliability of a complex system is the most critical requirement for the cyber physical system because an unreliable system often leads to service disruption, property dam-age, financial loses and sometimes lead to fatality. In order to develop more reliable CPS, this paper proposes a generic framework for reliability modeling and analysis for our ongoing work on cyber physical systems.This paper, at first defines an architecture for general CPS which is comprised of three layers; environment layer, communication layer, and computational layer. Secondly, we formalize a reliability model for the architectural components, and then propose a framework for the reliability of CPS with the consideration of how to capture the reliability. Based on the research method, we demonstrate the proposed frame-work with an illustrative example by using different reliability values from offshore and onshore reliability data library. We confirmed that the reliability model covers almost all possible reliabilities required to general cyber-physical systems.