M. Gergeleit

RheinMain University of Applied Sciences

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E. Nett

Otto-von-Guericke University Magdeburg

Michael Mock

TU Dresden

Leandro Buss Becker

University of Manchester

Marco Ehrlich

Ostwestfalen-Lippe University of Applied Sciences and Arts

Henning Trsek

Ostwestfalen-Lippe University of Applied Sciences and Arts

Hermann Streich

Fraunhofer Institute for Intelligent Analysis and Information Systems

Alexios Karagiozidis

RheinMain University of Applied Sciences

Edgar Nett

Otto-von-Guericke University Magdeburg

Stefan Schemmer

University Hospital Magdeburg

Kostyantyn Simkin

RheinMain University of Applied Sciences

Cooperative Institutions

RheinMain University of Applied Sciences

Center for Information Technology

Otto-von-Guericke University Magdeburg

University Hospital Magdeburg

Gesellschaft Fur Mathematik Und Datenverarbeitung

FZI Research Center for Information Technology

Institute of Electrical and Electronics Engineers

Ostwestfalen-Lippe University of Applied Sciences and Arts

DSI Informationstechnik (Germany)

Humboldt-Universität zu Berlin

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Secure and Flexible Deployment of Industrial Applications inside Cloud-Based Environments

Marco Ehrlich Henning Trsek M. Gergeleit Julius Paffrath Kostyantyn Simkin

Future industrial production systems following the paradigms of Industrie 4.0 will be reconfigured frequently and new system configurations will be deployed automatically as part of the engineering processes. In order to keep pace with this requirement of increased flexibility, it will be needed to achieve the adequate security levels in an automated way and to reduce the current static procedures and manual efforts as much as possible. Therefore, a modelling of all security-related functionalities and capabilities is mandatory. This paper further describes an approach for such a modelling based on the IEC 62443 security standard and an implementation of an automated deployment of components inside an industrial environment established with the OASIS Tosca and Ansible tools. The first results of the whole tool chain are evaluated with a real-world use case of software deployment in a suitable lab environment.

Pace

10.1109/etfa.2019.8868978

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Citations (8)

Checking timing constraints in distributed object-oriented programs

ACM SIGPLAN OOPS Messenger (1996)

M. Gergeleit Jozef Kaiser Hermann Streich

In real-time systems design-assumptions can be divided into functional and temporal assumptions. While checks for functional correctness are already addressed by some modern programming languages (e.g. Eiffel's pre- and postconditions), checks for temporal correctness are usually out of the scope of the existing programming or runtime systems. Our work in the DIRECT [GKS94] project tries to fill this gap. A methodology for specifying and checking timing constraints in an object-oriented environment is presented. The approach extends previous work on RTL[JM86] (Real-Time Logic) based monitors towards an object-oriented responsive system. The paper focuses on how object-orientation can be utilized to simplify the specification and the checking of timing constraints and how this can be integrated into an existing programming language like C++.

Eiffel

Scope (computer science)

10.1145/227986.227995

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Citations (18)

Towards Automated Security Evaluation within the Industrial Reference Architecture

Marco Ehrlich M. Gergeleit Henning Trsek Georg Lukas

The current developments towards the visions of Industrie 4.0 will create open and dynamic architectures being supervised by Industrial Automation and Control Systems. Due to this new connectivity and flexibility, future industrial production systems need to be inspected during all phases of the whole lifecycle from a security point of view as well. Frequent reconfiguration and adaptation based on smart services impose advanced requirements on the audits and certification with regard to security. To facilitate that, this work presents an approach for the modeling of security requirements and capabilities within the Industrial Reference Architecture and evaluates it based on the concrete system architectures of a number of industrial use cases. The result is the Sec4ICS tooling-based concept for the automated assessment of security-related functionalities within industrial systems.

Control reconfiguration

Industrial control system

Control system security

10.1109/etfa46521.2020.9211883

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Citations (1)

Enhancing O-O Middleware to Become Time-Aware

Springer eBooks (2001)

E. Nett M. Gergeleit Michael Mock

Implementation

Structuring

Legacy system

10.1007/978-1-4615-1695-8_6

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Citations (2)

An adaptive approach to object-oriented real-time computing

E. Nett M. Gergeleit Michael Mock

Real time computing is becoming an enabling technology for many important distributed applications such as flexible manufacturing, multimedia, robotics and process control. Traditionally, real time systems have been realized as isolated embedded systems. Unfortunately, this approach no longer suffices for future complex systems in the application scenarios mentioned above. In this situation, the use of an object oriented design paradigm greatly reduces the complexity of the system while improving reusability and manageability. Furthermore, the surrounding IT infrastructure is more and more accessible through object oriented interfaces (e.g. CORBA). In addition, object oriented modeling allows reflection of the dynamic characteristics of the applications mentioned above by instantiating objects dynamically. In order to meet the real time requirements in such an environment, static scheduling is not sufficient since many non predictable resource conflicts influence execution times. Therefore, the most distinguishing requirement of these complex heterogeneous systems is the need of the computing system to dynamically adapt to dynamically changing conditions. Little work has been done on integrating object oriented system design with resource allocation algorithms that are flexible enough to cope with this new requirement. The paper presents an approach for an adaptive object oriented system with integrated monitoring, dynamic execution time prediction and scheduling. It explains how this approach is applied to CORBA and C++.

Reusability

10.1109/isorc.1998.666806

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Citations (36)

TaskPair-scheduling with optimistic case execution times-an example for an adaptive real-time system

M. Gergeleit Hermann Streich

The paper first describes a model for an adaptive real time system, that consists of four components: the real time application, a monitor that observes the behaviour of the application, a dynamic resource manager that controls the execution of the application based on the data collected by the monitor, and finally an adaptation manager that uses the input from the monitor to implement long term adaptation strategies. In the second part of the paper, a concrete adaptation mechanism is introduced. This mechanism extends TaskPair scheduling (H. Streich, 1995), an online, fault tolerant scheduling method developed at GMD within the context of the DIRECT project (M. Gergeleit et al., 1994). TaskPair scheduling is extended with the notion of optimistic case execution time (OCET), that describes the time that a task needs in most of the cases for successful completion. As this time may depend on the system state and the environment, the system observes the actual resource consumption during execution and adapts future resource requests accordingly.

Context switch

Resource consumption

Real-time operating system

Worst-case execution time

10.1109/words.1996.506263

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Citations (9)

Guaranteeing Real-Time Behaviour in Adaptive Distributed Systems

IFAC Proceedings Volumes (1998)

E. Nett M. Gergeleit Michael Mock

10.1016/s1474-6670(17)41952-5

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Citations (1)

Real-Time Systems (2001)

E. Nett M. Gergeleit Michael Mock

10.1023/a:1008146006209

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Citations (12)

On the design of a dynamic distributed real-time environment

Hermann Streich M. Gergeleit

Development of distributed real-time applications requires tools and methods ranging from the design process down to the run-time system. This paper describes an approach towards an integrated object-oriented real-time environment, providing a new conceptual structuring method, distributed dynamic scheduling, and a real-time executive, based on a standard real-time operating system. TaskPairs are introduced as a method for structuring distributed object-oriented applications that consist of a mix of hard-, soft- and non-real-time jobs. From this language level structure the compiler and a run-time monitor create an abstract representation of the system's objects, their dependencies, and their actual timing behaviour. Based on this information about the current system state the distributed resource management dynamically tries to construct a feasible schedule.

Structuring

Compile time

Distributed Computing Environment

10.1109/wpdrts.1997.637988

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Citations (11)

An integrated environment for the complete development cycle of an object-oriented distributed real-time system.

Computer Systems: Science & Engineering (2001)

Leandro Buss Becker M. Gergeleit Edgar Nett Carlos Eduardo Pereira

This paper describes a powerful integrated development environment that covers all steps of the development of an object-oriented real-time application from initial design to the final evaluation. The system consists of a set of integrated tools for modeling, simulation, implementation, instrumentation, monitoring, and visualization that all work on the same OO system model. As all steps of creating a running implementation with visualized monitoring output from the design model are automatic, the environment encourages an iterative approach to the design of complex real-time control applications. This complete environment has been accomplished by integrating the SIMOO-RT modeling, simulation and implementation environment, developed at the Federal University of Rio Grande do Sul, with the Jewel++ object-oriented instrumentation and monitoring tool from GMD, St. Augustin, Germany. The work has been done in the context of the ADOORATA project (A Distributed Object-Oriented Architecture for Real-Time Automation), a Brazilian-German cooperation.

Instrumentation

Development environment

Source

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Citations (3)