The AirTight Protocol for Mixed Criticality Wireless CPS

Abstract

This paper describes the motivation, design, analysis and con guration of the criticality-aware multi-hop wireless communication protocol AirTight. Wireless communication has become a crucial part of the infrastructure of many cyber-physical applications. Many of these applications are real-time and also mixed-criticality, in that they have components/subsystems with di erent consequences of failure. Wireless communication is inevitably subject to levels of external interference. In this paper we represent this interference using a criticality-aware fault model; for each level of temporal interference in the fault model we guarantee the timing behaviour of the protocol (i.e. we guarantee that packet deadlines are satis ed for certain levels of criticality). Although a new protocol, AirTight is built upon existing standards such as IEEE 802.15.4. A prototype implementation and protocol-accurate simulator have been produced. This paper develops a series of schedulability analysis techniques for single-channel and multichannel wireless Cyber-Physical Systems (CPS). Heuristics are speci ed and evaluated as the starting point of design space exploration. Genetic algorithms are then de ned and evaluated to assess their performance in developing schedule tables incorporating multichannel allocations in these systems. CCS Concepts: • Computer systems organization → Embedded and cyber-physical systems; Realtime systems; • Software and its engineering → Software veri cation;

Toward Resilience in Mixed Critical Industrial Control Systems: A Multi-Disciplinary View

“…Disasterresilient communication networks were extensively studied in the book [32], where fundamentals of communication networks' resilience are provided including many works of various researchers around the globe. A plethora of works discuss, propose, and analyze criticality-aware systems in communications [33]- [35]. For example, [33] proposes a priority-aware wireless fieldbus protocol and studies the scheme using a plastic extrusion process monitoring scenario.…”

“…For example, [33] proposes a priority-aware wireless fieldbus protocol and studies the scheme using a plastic extrusion process monitoring scenario. The works [34], [35] in particular propose the Air-Tight wireless communication protocol under mixed criticality systems, which also provides resilience. The authors present the motivation, design, analysis, and implementation of the protocol for time-critical CPSs including real-time and mixed criticality requirements.…”

“…packet deadlines and fault experience [34], and w.r.t. schedulability [35]. The authors base the protocol upon the physical (PHY) layer and medium access control (MAC) layer of IEEE 802.15.4.…”

Comeback Kid: Resilience for Mixed-Critical Wireless Network Resource Management

“…Usually, the links are categorized as safety, mission, and low-critical links. AirTight, a protocol for timecritical cyber physical systems (CPS) including real-time and mixed criticality requirements, has been proposed in [49] and [50]. Thereby, a criticality-aware fault model is utilized to capture external interference, in which mixed criticality is implemented as different amounts of maximum deadline misses of traffic links.…”

Modeling Time Requirements of CPS in Wireless Networks

“…J. Harbin et al [19] presents an extension of AirTight [20], a TDMA single-hop protocol, to a multi-hop version with new techniques for slot allocation. The authors assume that nodes are connected to a power supply, to avoid energy-aware techniques (e.g., MAC duty-cycling).…”