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international symposium on object-oriented real-time distributed computing

作者： R.G. Pettit H. Gomaa Aerospace Corporation Chantilly VA USA ISE Department George Mason University Fairfax VA USA

object-oriented software development practices are being rapidly adopted within increasingly complex systems, including reactive, real-time and concurrent system applications. While data modeling is performed very well under current object-oriented development practices, behavioral modeling necessary to capture critical information in real-time, reactive, and concurrent systems is often lacking. Addressing this deficiency, we offer an approach for modeling and analyzing concurrent object-oriented software designs through the use of behavioral patterns captured through colored Petri nets

关键词： Petri nets object oriented modeling Computer architecture Unified modeling language Software design Software architecture real time systems Application software Programming Software systems

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Towards an organic middleware for real-time applications

Towards an organic middleware for real-time applications

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international symposium on object-oriented real-time distributed computing

作者： M. Pacher A. von Renteln U. Brinkschulte Institute for Process Control and Robotics University of Karlsruhe Germany

This paper presents the architecture and conception of an organic middleware based on the yet existing, not organic middleware OSA+. We show new general design principles helping to establish the self-organizing middleware which can be used for totally different applications like robotics, warehouse management and the planning of a person's daily routine

关键词： Middleware Embedded system Robots distributed computing Process control Microcontrollers Programming profession Stability Costs Universal Serial Bus

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A hybrid approach in TADE for derivation of execution time bounds of program-segments in distributed real-time embedded computing

A hybrid approach in TADE for derivation of execution time b...

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international symposium on object-oriented real-time distributed computing

作者： Chansik Im K.H. Kim Intel Corporation Hillsboro OR USA University of California Irvine CA USA

Guaranteeing response times of real-time (RT) distributed computing systems has been recognized as one of the biggest challenges by the RT software research community for three decades. The concept of a hybrid approach that combines analytical derivation approaches and testing-based statistical derivation approaches in a symbiotic form for meeting this challenge was presented in recent years. However, concrete practical hybrid approaches are still in early stages of development. One such approach pursued by the authors and their collaborators is presented here. This paper focuses on the cases of deriving tight execution time bounds of the segments of object methods which do not involve calls for services from the operating system kernel and middleware. A case-study that demonstrates how the adopted approach works in handling a simple practical application is also presented

关键词： Embedded computing Delay real time systems distributed computing Testing Symbiosis Concrete Collaborative work Operating systems Kernel

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Complexity management for composable real-time systems

Complexity management for composable real-time systems

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international symposium on object-oriented real-time distributed computing

作者： B. Rumpler Institute of Computer Engineering University of Technology Vienna Vienna Austria

Embedded real-time systems are becoming increasingly complex due to ever increasing size and functionality so that complexity management is of growing importance, especially in dependable hard real-time systems development, where errors caused by complexity can have fatal consequences. This paper systematically characterizes different kinds of complexity: system-level complexity, component interface complexity, and component implementation complexity. The effects of the different kinds of complexity are described and it is explained why minimizing system-level complexity should be a principal goal of any distributed embedded real-time systems architecture. The concept of system-level components is introduced as a solution to the problem of system-level complexity during the integration process

关键词： real time systems Computer architecture Application software distributed computing Centralized control Embedded computing Control systems Systems engineering and theory Technology management Engineering management

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XML descriptor based approach for real time data messaging

XML descriptor based approach for real time data messaging

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international symposium on object-oriented real-time distributed computing

作者： P.M.S. Poon T.S. Dillon E. Chang Ling Feng Sydney University of Technology Sydney Australia School of Information Systems Curtin University of Technology Australia Department of Computer Science University of Twente Enschede Netherlands

This paper presents an overview of the real time markup language (RTML). RTML is a XML profile which provides the syntactic representation for describing the semantics of real time data for exchange over distributed networked real time systems. For the basis of interoperability, this profile is described in the XML schema language. This paper describes the background of this work and shows how the vocabularies are developed, and how it derives the extensibility of XML schema in aiding the definition of data in real time systems in order to achieve the goal of interoperability

关键词： XML real time systems Collaboration Databases Vocabulary Collaborative work Middleware Intelligent sensors distributed computing Information technology

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An IEEE1394-based real-time distributed IPC system for collaborating TMO's

An IEEE1394-based real-time distributed IPC system for colla...

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international symposium on object-oriented real-time distributed computing

作者： Jae Gi Son Sang Hyun Park Jung-Guk Kim Moon Hae Kim Hankuk University of Foreign Studies South Korea Konkuk University South Korea

The TMO (time-triggered message-triggered object) model is a well-known real-time object model for distributed timeliness computing. In a couple of years ago, we developed a Linux-based real-time kernel, named TMO-Linux, supporting deadline driven executions of TMO's. TMO-Linux and its distributed IPC subsystem have been used well in developing networked control systems consisting of cooperating embedded devices, but there have difficulties in executing some TMO applications accurately due to the lack of timeliness in distributed communications. To overcome this problem, we newly developed a real-time distributed IPC over IEEE1394 for the TMO-Linux kernel. In the new system, predictable delivery services for real-time messages are provided by isochronous transmissions of IEEE1394. To implement predictable delivery services, each node is set to have its own isochronous channel for receiving data that is allocated to a fixed time-slot bandwidth in an IEEE1394 frame. This paper presents an implementation technique for the IEEE1394-based real-time distributed IPC and collaborations of computing nodes using TMO-Linux

关键词： real time systems Collaboration Kernel Engines distributed computing Middleware Linux Moon Networked control systems Bandwidth

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distributed real-time computing in autonomous robots using time-triggered and message-triggered objects (TMOs)

Distributed real-time computing in autonomous robots using t...

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international symposium on object-oriented real-time distributed computing

作者： J.O. Biermeyer V.P. Srini B. Kleinjohann DREAM Laboratory University of California Irvine USA Data Flux Systems Inc. Berkeley USA C-Laboratory University of Paderborn Germany

distributed real-time computing is one of the enabling technologies in establishing a team of autonomous robots. A team of soccer playing robots, Paderkicker, contains many computing nodes handling environment perception, artificial intelligence, team coordination, autonomous actuation, and interactions with external entities such as a remote server. Robots must act with varying degrees of autonomy in real-time. The time-triggered message-triggered object (TMO) programming scheme offers a high-level high-precision approach to programming of distributed real-time computing operations. The TMO programmer can apply deadlines to method executions and result-arrivals in a straightforward way. He is thus relieved from dealing with low-level resource allocation details and can show considerably increased productivity. This paper describes a TMO structuring approach for constructing teams of autonomous robots. A TMO network architecture is described for the Paderkicker team

关键词： distributed computing Robot sensing systems Robot kinematics Intelligent robots Artificial intelligence Robot programming Robot vision systems Humans Computer architecture Embedded system

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Java framework for distributed real-time embedded systems

Java framework for distributed real-time embedded systems

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international symposium on object-oriented real-time distributed computing

作者： E.T. Silva E.P. Freitas F.R. Wagner F.C. Carvalho C.E. Pereira Instituto de Informática Federal University of Rio Grande do Sul Brazil Electrical Engineering Department Federal University of Rio Grande do Sul Brazil

This paper presents the evaluation of a multithread distributed real-time object-oriented platform. A communication API was developed to increase functionalities of an API that implements the real-time specification for Java standard, extending it to cover embedded distributed applications. real-time restrictions of the communication are ensured by a time-out mechanism. The API can be adapted to be used with different underlying network and physical mediums. The development focused on restrictive embedded platforms with low performance and small memory. An evaluation in terms of the fulfillment of timing constraints, and memory footprint is presented for a CAN-bus network. The results also demonstrate the timely correctness provided by the communication API running over an RTSJ implementation

关键词： Java real time systems Embedded system Communication system control Timing Yarn Communication standards Memory management Automobiles Educational technology

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Automatic performance visualization of distributed real-time systems

Automatic performance visualization of distributed real-time...

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international symposium on object-oriented real-time distributed computing

作者： T. Harmon R. Klefstad Department of Electrical Engineering and Computer Science The Henry Samueli University of California Irvine Irvine CA USA

For distributed real-time systems, adequate profiling tools are exceedingly rare. The sheer variety and low-level nature of these systems impede the adoption of standard, general-purpose tools for performance analysis and visualization. Although much research has been devoted to profiling parallel clusters and supercomputers, the literature virtually ignores the real-time domain. Correspondingly, a handful of commercial tools is available for profiling realtime software, but they invariably make a single-node assumption and are unable to cope with distributed environments. We examine the state of performance analysis and discuss why profilers are conspicuously absent in the field of distributed real-time systems. We then explore how developers of these systems could benefit from graphical profiling tools with automatic instrumentation and data collection. Toward that end, we demonstrate the prototype of a performance visualization tool called "Bacara", the second addition to our suite of tools for visual analysis of distributed real-time systems, or VADR (vamacr'der)

关键词： Visualization real time systems Performance analysis Instruments Sampling methods Software performance Cryptography Poles and towers Impedance Supercomputers

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Message from the symposium Co-chairs

Proceedings - Ninth IEEE International Symposium on Object-O...

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Proceedings - Ninth IEEE international symposium on object-oriented real-time distributed computing, ISORC 2006 2006年 xii页

作者： Moon, Hae Kim Puschner, Peter Insup, Lee Konkuk University Korea Republic of Vienna University of Technology Austria University of Pennsylvania United States

No abstract available

ISBN: (纸本)076952561X

No abstract available

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