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Implementation of the MIALinx integration concept for future manufacturing environments to enable retrofitting of machines

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Procedia CIRP 2019年 79卷 596-601页

作者： Dominik Lucke Peter Einberger Daniel Schel Michael Luckert Matthias Schneider Emir Cuk Thomas Bauernhansl Matthias Wieland Frank Steimle Bernhard Mitschang Fraunhofer Institute for Manufacturing Engineering and Automation IPA Nobelstraße 12 70569 Stuttgart Germany Hochschule Reutlingen ESB Business School Alteburgstr. 150 72762 Reutlingen Germany University of Stuttgart Institute for Parallel and Distributed Systems (IPVS) Universitätsstraße 38 70569 Stuttgart Germany

Manufacturing has to adapt to changing situations in order to stay competitive. It demands a flexible and easy-to-use integration of production equipment and ICT systems. The contribution of this paper is the presentation of the implementation of the Manufacturing Integration Assistant (MIALinx). The integration steps range from integrating sensors over collecting and rule-based processing of sensor information to the execution of required actions. Furthermore, we describe the implementation of MIALinx by commissioning it in a manufacturing environment to retrofit legacy machines for Industrie 4.0. Finally, we validate the suitability of our approach by applying our solution in a medium-size company.

关键词： Manufacturing Smart factory Industrie 4.0 Manufacturing service bus Rules Integration MIALinx

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HAWKS: A System for Highly Available Executions of Workflows

HAWKS: A System for Highly Available Executions of Workflows

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IEEE International Conference on Services Computing (SCC)

作者： David Richard Schäfer Andreas Weiß Muhammad Adnan Tariq Vasilios Andrikopoulos Santiago Gómez Säez Lukas Krawczyk Kurt Rothermel Institute of Parallel and Distributed Systems (IPVS) University of Stuttgart Stuttgart Germany Universitat Stuttgart Stuttgart Baden-WÃ¼rttemberg DE Institute of Architecture of Application Systems (IAAS) University of Stuttgart Stuttgart Germany

The workflow technology is the de facto standard for managing business processes. Today, workflows are even used for automating interactions and collaborations between business partners, e.g., for enabling just-in-time production. Every workflow that is part of such a collaboration needs to be highly available. Otherwise, the business operations, e.g., the production, might be hindered or even stopped. Since today's business partners are scattered across the globe, the workflows are executed in a highly distributed and heterogeneous environment. Those environments are, however, failure-prone and, thus, providing availability is not trivial. In this work, we improve availability by replicating workflow executions, while ensuring that the outcome is the same as in a non-replicated execution. For making workflow replication easily usable with current workflow technology, we derive the requirements for modeling a workflow replication system. Then, we propose the HAWKS system, which adheres to the previously specified requirements and is compatible with current technology. We implement a proof-of-concept in the open-source workflow execution engine Apache ODE for demonstrating this compatibility. Finally, we extensively evaluate the impact of using HAWKS in terms of performance and availability in the presence of failures.

关键词： Business Engines Protocols Computational modeling Synchronization Nominations and elections Reliability

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Improving the Efficiency of Cloud Infrastructures with Elastic Tandem Machines

Improving the Efficiency of Cloud Infrastructures with Elast...

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IEEE International Conference on Cloud Computing, CLOUD

作者： Frank Dürr Institute of Parallel and Distributed Systems (IPVS) Universität Stuttgart Stuttgart Germany

In this paper, we propose a concept for improving the energy efficiency and resource utilization of cloud infrastructures by combining the benefits of heterogeneous machine instances. The basic idea is to integrate low-power system on a chip (SoC) machines and high-power virtual machine instances into so-called Elastic Tandem Machine Instances (ETMI). The low-power machine serves low load and is always running to ensure the availability of the ETMI. When load rises, the ETMI scales up automatically by starting the high-power instance and handing over traffic to it. For the non-disruptive transition from low-power to high-power machines and vice versa, we present a handover mechanism based on software-defined networking technologies. Our evaluations show the applicability of low-power SoC machines to serve low load efficiently as well as the desired scalability properties of ETMIs.

关键词： Handover Servers IP networks System-on-chip Hardware Protocols

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Cooperative service registries for the service-based Product Lifecycle Management architecture

Cooperative service registries for the service-based Product...

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International Conference on Computer Supported Cooperative Work in Design

作者： Stefan Silcher Jan Königsberger Peter Reimann Bernhard Mitschang Graduate School of Excellence advanced Manufacturing Engineering (GSaME) Institute for Parallel and Distributed Systems (IPVS) University of Stuttgart Stuttgart Germany Institute for Parallel and Distributed Systems (IPVS) University of Stuttgart Stuttgart Germany

ISBN: (纸本)9781467360845

Product Lifecycle Management (PLM) comprises many different tasks across multiple domains, such as product development and production. Thus, multidisciplinary engineering teams have to collaborate to successfully design and produce products. Nowadays, engineers are supported with many software solutions, which are tailored to the work of each engineer. The problem is the missing or bad integration between these IT solutions, which leads to noncontinuous processes and an insufficient cooperation. The Service-oriented Architecture (SOA) supports the needed flexible integration of applications based on services and moreover an automation and integration of processes via workflows. In previous work, we proposed a service-oriented PLM architecture that provides these benefits and supports continuous processes. Thereby, services of different domains and phases of the product life cycle need to collaborate in a distributed fashion. In this paper, we systematically identify, define and rate representative models for the management of corresponding distributed service registries, which enable an efficient collaboration of services. Based on a prototypical implementation of the best-rated model in a layout redesign scenario, we assess our approach for its suitability in PLM. The selected service registry model provides transparent access to all services of different domains and shows the ease of integrating new applications into the product life cycle. It thereby enables an improved cooperation of engineers across various domains to define cross-domain processes.

关键词： Service-oriented architecture Load modeling Maintenance engineering Computer architecture Production Companies Manufacturing

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A Holistic Management Model for Manufacturing Companies and Related IT Support

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Procedia CIRP 2013年 7卷 175-180页

作者： Stefan Silcher Barbara Seeberg Erich Zahn Bernhard Mitschang Graduate School of Excellence advanced Manufacturing Engineering (GSaME) University of Stuttgart 70569 Stuttgart Germany Institute for Parallel and Distributed Systems (IPVS) University of Stuttgart 70569 Stuttgart Germany

Life cycle and management concepts are a necessity to compete in current turbulent markets. Small- and medium-sized enterprises (SME) struggle when realizing such concepts and accordant IT support. In this paper we review different concepts and their similarities and differences are discussed. We focus on Product Lifecycle Management (PLM), Supply Chain Management and Factory Lifecycle Management to integrate them into a holistic management model. Subsequently, we extend a service-based PLM architecture to support the holistic management model to continuously support processes. The usage of standardized technologies allows companies, and especially SMEs, to implement this architecture with low costs and effort.

关键词： Product Lifecycle Management Supply Chain Management Factory Lifecycle Management Holistic Management Model IT Integration Service-oriented Architecture Enterprise Service Bus

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A Predictive Protocol for Mobile Context Updates with Hard Energy Constraints

A Predictive Protocol for Mobile Context Updates with Hard E...

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International Conference on Mobile Data Management

作者： Stefan Föll Florian Berg Klaus Herrmann Kurt Rothermel Institute of Parallel and Distributed Systems (IPVS) Universität Stuttgart Stuttgart Germany

As mobile devices have become powerful sensor platforms, new applications have emerged which continuously stream mobile user context (location, activities, etc.). However, energy is a limited resource on battery-equipped mobile devices. Especially frequent transmissions of context updates over energy-expensive wireless channels drain the battery of mobile devices in an uncontrolled manner. It is a fundamental algorithmic challenge to design protocols such that users can control the energy consumption on mobile devices while, at the same time, optimizing the quality of mobile applications. To address this trade-off in the area of context update protocols, we propose a novel protocol that maximizes the context accuracy perceived by a remote consumer while guaranteeing that the consumed energy stays under a given limit. Our update protocol exploits predictions about a user's future behaviour to give priority to the most effective context updates. In our evaluation, we apply our predictive update protocol to a real-world trace of user context and show that the context accuracy is significantly increased compared to an update protocol which operates without predictions under the same energy budget.

关键词： Context Protocols Accuracy Mobile communication Sensors Stochastic processes Mobile handsets

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Adjustable Module Isolation for distributed Computing Infrastructures

Adjustable Module Isolation for Distributed Computing Infras...

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International Workshop on Grid Computing

作者： Sven Schulz Wolfgang Blochinger Institute of Parallel and Distributed Systems (IPVS) University of Stuttgart Germany

Cloud Computing infrastructures and Grid Computing platforms are representatives of a new breed of systems that leverage the modularity paradigm to assemble large-scale dynamic applications from modules contributed by different, possibly untrustworthy providers. Increased susceptibility to faults, diminished accountability, and complex system configuration are major challenges when assembling and operating such systems. In this paper, we describe how to solve these problems by retrofitting module management systems with the ability to deploy modules to execution environments with adjustable degree of isolation. We give a formal definition of the underlying hierarchical Module Isolation Problem and devise an online algorithm to solve it in an incremental fashion. We discuss how to apply our approach to a state-of-the-art module management system and demonstrate its effectiveness by an experimental evaluation.

关键词： Virtual machining Production facilities Runtime Heuristic algorithms Optimization Java Registers

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NETbalance: Reducing the Runtime of Network Emulation Using Live Migration

NETbalance: Reducing the Runtime of Network Emulation Using ...

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International Conference on Computer Communications and Networks (ICCCN)

作者： Andreas Grau Klaus Herrmann Kurt Rothermel Institute of Parallel and Distributed Systems (IPVS) Universität Stuttgart Stuttgart Germany

Network emulation is an efficient method for evaluating distributed applications and communication protocols by combining the benefits of real world experiments and network simulation. The process of network emulation involves the execution of connected instances of the software under test (called virtual nodes) in a controlled environment. In previous work, we introduced an approach to minimize the runtime of network emulation experiments based on prior known average resource requirements of virtual nodes. In this paper, we introduce NETbalance, a novel approach to runtime reduction for experiments with unknown or varying resource requirements. NETbalance migrates virtual nodes during an experiment to distribute the load evenly across the physical nodes, avoiding overloaded nodes and exploiting the idle resources on underloaded nodes for speeding up the experiment execution. We make the following contributions: First, we present an emulation architecture for efficiently supporting live migration of virtual nodes. Second, we propose a cost model for determining the runtime reduction achieved through the migration. Third, we introduce an algorithm for calculating placements that minimize the experiment runtime. Our evaluations of the NETbalance prototype show, that it is able to reduce the experiment runtime by up to 70%.

关键词： Runtime Emulation Network topology Load modeling Topology Optimization Computer architecture

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Adaptive routing in a contextcast overlay network

Adaptive routing in a contextcast overlay network

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IEEE International Conference on Wireless and Mobile Computing, Networking And Communications (WiMob)

作者： Lars Geiger Frank Dürr Kurt Rothermel Institute of Parallel and Distributed Systems (IPVS) Universität Stuttgart Stuttgart Germany

Context-based communication allows for the dissemination of messages to mobile users with a specified context, i.e. at a location and with certain attribute values. This enables, e.g., a message to students on campus attending a certain class, with information about a study group for an upcoming exam. An overlay network of context-aware routers efficiently disseminate the messages to all matching receivers. Directed forwarding of such messages requires that the routers maintain knowledge about the contexts of connected users. Global knowledge, i.e., each router knowing about every user, scales poorly, though, because of the necessary updates.

关键词： Context Receivers Routing Semantics Subscriptions Adaptive systems Adaptation models

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Aggregation of user contexts in context-based communication

Aggregation of user contexts in context-based communication

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Conference on Next Generation Internet Networks, NGI

作者： Lars Geiger Frank Dürr Kurt Rothermel Institute of Parallel and Distributed Systems (IPVS) Universität Stuttgart Stuttgart Germany Institute of Parallel and Distributed Systems (IPVS) Universitätsstrasse 38 Stuttgart Germany

ISBN: (纸本)9781424481675;9781424481668

A context-based communication system enables the indirect addressing and routing of messages according to the users' contexts. This provides, for example, the means to send a message to all students on campus who attend a certain class, with information about an upcoming exam. However, for a targeted forwarding of messages towards users, the routers need information about the context of connected users. Global knowledge, i.e., each router knowing about every user, is not scalable, though, because of the necessary update messages to keep this information up-to-date. To address this challenge, a router can aggregate similar contexts and only provide such an aggregated view to neighboring routers. In this paper, we present an approach to aggregate similar contexts, based on a similarity measure for user contexts. The algorithm can be adjusted according to the observed messages and user contexts in the system by specifying a similarity threshold to determine when contexts are aggregated. The aggregation of user contexts improves the scalability of our approach by significantly reducing the load of context updates by up to 30%, depending on the usage of the system. This improvement comes at the cost of a negligible increase in false positive messages due to the loss of information used for forwarding messages.

关键词： Context Routing Aggregates Broadcasting Scalability Costs Matched filters Prototypes Subscriptions

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