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Modelling and distributed simulation of asynchronous hardware

simulation PRACTICE AND THEORY 2000年第8期7卷 741-767页

作者： Theodoropoulos, GK Univ Birmingham Sch Comp Sci Birmingham B15 2TT W Midlands England

Synchronous VLSI design is approaching a critical point, with clock distribution becoming an increasingly costly and complicated issue and power consumption rapidly emerging as a major concern. Hence, recently, there has been a resurgence of interest in asynchronous digital design techniques as they promise to liberate VLSI systems from clock skew problems, offer the potential for low power and high performance and encourage a modular design philosophy which makes incremental technological migration a much easier task. This activity has revealed a need for modelling and simulation techniques suitable for the asynchronous design style. Contributing to the quest for modelling and simulation techniques suitable for asynchronous design, and motivated by the increasing debate regarding the potential of CSP for this purpose, this paper investigates the suitability of occam, a CSP-based programming language, for the modelling and simulation of complex asynchronous systems. A generic modelling framework is introduced and issues arising from the parallel semantics of CSP/occam when the latter is employed to perform simulation are addressed. (C) 2000 Elsevier Science B.V. All rights reserved.

关键词： asynchronous hardware asynchronous micropipelines modelling distributed simulation occam CSP asynchronous processing occam protocol

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Shared state synchronization for HLA-based distributed simulation

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simulation-TRANSACTIONS OF THE SOCIETY FOR MODELING AND simulation INTERNATIONAL 2006年第8期82卷 511-521页

作者： Low, Malcolm Yoke Hean Gan, Boon Ping Wei, Junhu Wang, Xiaoguang Turner, Stephen John Cai, Wentong Nanyang Technol Univ Sch Comp Engn Singapore 639798 Singapore Singapore Inst Mfg Technol Singapore 638075 Singapore Xi An Jiao Tong Univ Syst Engn Inst Xian 710049 Peoples R China

The problem of shared state is well known to the parallel and distributed simulation research community. In this article, the authors revisit the problem of shared state in the context of a High Level Architecture (HLA)-based distributed simulation. A middleware approach is proposed to solve this problem within the framework of the HLA runtime infrastructure. Four solutions to this problem are implemented in the middleware using receive-order messages. The authors discuss the implementation issues of these four solutions in the middleware. Experimental results comparing the performance of these four solutions against a simple request-reply approach using timestamp-order messages are also presented.

关键词： shared state zero lookahead High Level Architecture distributed simulation

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Optimistic synchronization in HLA-based distributed simulation

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simulation-TRANSACTIONS OF THE SOCIETY FOR MODELING AND simulation INTERNATIONAL 2005年第4期81卷 279-291页

作者： Wang, XG Turner, SJ Low, MYH Gan, BP Nanyang Technol Univ Sch Comp Engn Parallel & Distributed Comp Ctr Singapore 639798 Singapore Singapore Inst Mfg Technol Singapore 638075 Singapore

With the wide use of commercial off-the-shelf (COTS) simulation packages and the advent of the High Level Architecture (HLA) standard, it is desirable to build distributed simulations by linking various types of simulation models developed using best-fit COTS packages. While almost all current work on integrating COTS packages and the HLA is based on conservative synchronization, it is worthwhile to investigate the optimistic synchronization approach. The optimistic approach can exploit parallelism and achieve promising performance in situations where causality errors may occur but in fact seldom occur. The authors introduce a rollback controller using a middleware approach to handle the complex rollback procedure on behalf of the simulation model. A new time advance algorithm is proposed that can fully use the benefits of optimistic synchronization. The article also describes a scalability study showing the experimental results for the two synchronization approaches as the number of simulation components increases.

关键词： distributed simulation optimistic synchronization commercial-off-the-shelf (COTS) simulation packages high level architecture (HLA) rollback controller

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Digital Battle: A Three-Layer distributed simulation Architecture for Heterogeneous Robot System Collaboration

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DRONES 2024年第4期8卷 156-156页

作者： Gao, Jialong Liu, Quan Chen, Hao Deng, Hanqiang Zhang, Lun Sun, Lei Huang, Jian Natl Univ Def Technol Coll Intelligence Sci & Technol Changsha 410073 Peoples R China

In this paper, we propose a three-layer distributed simulation network architecture, which consists of a distributed virtual simulation network, a perception and control subnetwork, and a cooperative communication service network. The simulation architecture runs on a distributed platform, which can provide unique virtual scenarios and multiple simulation services for the verification of basic perception, control, and planning algorithms of a single-robot system and can verify the distributed collaboration algorithms of heterogeneous multirobot systems. Further, we design simulation experimental scenarios for classic heterogeneous robotic systems such as unmanned aerial vehicles (UAVs) and unmanned ground vehicles (UGVs). Through the analysis of experimental measurement data, we draw several important conclusions: firstly, the replication time characteristics and update frequency characteristics of entity synchronization in our system indicate that the replication time of entity synchronization in our system is relatively short, and the update frequency can meet the needs of multirobot collaboration and ensure the real-time use and accuracy of the system;secondly, we analyze the bandwidth usage of data frames in the whole session and observe that the server side occupies almost half of the data throughput during the whole session, which indicates that the allocation and utilization of data transmission in our system is reasonable;and finally, we construct a bandwidth estimation surface model to estimate the bandwidth requirements of the current model when scaling the server-side scale and synchronization-state scale, which provides an important reference for better planning and optimizing of the resource allocation and performance of the system. Based on this distributed simulation framework, future research will improve the key technical details, including further refining the coupling object dynamic model update method to support the simulation theory of the coupl

关键词： heterogeneous robot systems distributed simulation communications middleware collaborative mechanism

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Experiences in simplifying distributed simulation: The HLA development kit framework

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JOURNAL OF simulation 2017年第3期11卷 208-227页

作者： Falcone, A. Garro, A. Taylor, S. J. E. Anagnostou, A. Chaudhry, N. R. Salah, O. Univ Calabria Dept Informat Modeling Elect & Syst Engn DIMES Via Bucci 41-C I-87036 Arcavacata Di Rende Italy Brunel Univ London Uxbridge Middx England

distributed simulation represents a solid discipline and an effective approach for handling the increasing complexity in the analysis and design of modern Systems and Systems of Systems (SoSs). The IEEE 1516-2010 - High-Level Architecture (HLA) is one of the most mature and popular standards for distributed simulation, and it is increasingly exploited in a great variety of application domains, ranging from aerospace to energy, due to its capabilities to enable the interoperability and reusability of distributed simulation components. However, the development of fully fledged simulation models, based on the IEEE 1516-2010 standard, is still a challenging task and requires considerable development effort that often results not only in an increase in development time but also in low reliability. In this context, the paper presents the HLA Development Kit framework, a general-purpose, domain-independent software framework that aims to ease the development of HLA-based simulations by letting the developers to focus on the specific aspects of their simulation rather than dealing with the common HLA functionalities. Moreover, the so obtained simulation code is independent of any specific HLA platform, thus enabling its deployment and execution on any desired implementation of the HLA standard provided it is written in Java. The effectiveness of the proposed framework is shown in the context of the simulation Exploration Experience (SEE), a project organized by the simulation Interoperability Standards Organization (SISO) and led by NASA that involves several U.S. and European Institutions.

关键词： distributed simulation high-level architecture agent-based simulation

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Development of a multi-agent-based distributed simulation platform for semiconductor manufacturing

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EXPERT SYSTEMS WITH APPLICATIONS 2011年第5期38卷 5231-5239页

作者： Lin, Jie Long, Qingqi Tongji Univ Sch Econ & Management Shanghai 200092 Peoples R China

Since the semiconductor manufacturing system is a large-scale complex system, it is difficult to solve complex problems in semiconductor manufacturing by the mathematical modeling method. This paper presents a multi-agent-based distributed simulation platform to support the extremely complex semiconductor manufacturing analysis. A multi-agent-based distributed simulation platform framework and a multi-agent collaborative control model are proposed to provide a flexible infrastructure and a multi-agent coordination mechanism in distributed environment for semiconductor manufacturing simulation. A multi-agent time synchronization model for distributed simulation is designed to keep events in the correct logical time order in simulation and steps of time synchronization are given. An interaction model and message formats are presented to describe how agents communicate with each other in simulation. The platform development and the design of graphical user interface are also exploited in this paper. Finally, evaluation of this multi-agent-based platform was illustrated with a case study. It indicates that the platform is effective in modeling and simulating the complex semiconductor manufacturing and provides the insights about how to improve the semiconductor manufacturing process with well targeted measures. (C) 2010 Elsevier Ltd. All rights reserved.

关键词： Multi-agent system JADE distributed simulation Time synchronization Semiconductor manufacturing

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Dynamically adaptive partition-based interest management in distributed simulation

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simulation MODELLING PRACTICE AND THEORY 2006年第7期14卷 1022-1042页

作者： Kumova, Bora I. Izmir Inst Technol Dept Comp Engn TR-35430 Izmir Turkey

Performance and scalability of distributed simulations depends primarily on the effectiveness of the employed interest management (IM) schema that aims at reducing the overall computational and messaging effort on the shared data to a necessary minimum. Existing IM approaches, which are based on variations or combinations of two principle data distribution techniques, namely region-based and grid-based techniques, perform poorly if the simulation develops an overloaded host. In order to facilitate distributing the processing load from overloaded areas of the shared data to less loaded hosts, the partition-based technique is introduced that allows for variable-size partitioning the shared data. Based on this data distribution technique, an IM approach is sketched that is dynamically adaptive to access latencies of simulation objects on the shared data as well as to the physical location of the objects. Since this re-distribution is decided depending on the messaging effort of the simulation objects for updating data partitions, any load balanced constellation has the additional advantage to be of minimal overall messaging effort. Hence, the IM schema dynamically resolves messaging overloading as well as overloading of hosts with simulation objects and therefore facilitates dynamic system scalability. (C) 2006 Elsevier B.V. All rights reserved.

关键词： distributed simulation interest management load distribution scalability adaptability

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Real-time scheduling by parallel and distributed simulation over IP multicast

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ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING 2006年第5-6期22卷 475-484页

作者： Horn, S. Weigert, G. Werner, S. Tech Univ Dresden Dept Elect Engn Elect Packaging Lab D-01062 Dresden Germany

Scheduling optimization of manufacturing processes becomes more and more important. Complex models with a lot of constraints cause a higher computational effort of the simulation. Optimization cycles of heuristic optimization algorithms like genetic algorithms or local search strategies can easily be scheduled in parallel. But recurrent requirements are the distribution of the model, the interchange of the parameters and results. The IP Multicast architecture is an ideal platform for distributing model data over the network. It reduces the network overhead for sending the model to different clients and simplifies also the initial setup between client and server. The client and the server are able to find each other automatically by preconcerted multicast channels. The developed test implementation is designed to work with the simulation system simeron MODELLER and will be used to handle typical optimization tasks like the weekly demand plan of a back-end process or optimal batch sizes for burn-in ovens. It is also suitable for educational purposes and we use it in practical courses where students learn more about factory scheduling. The system offers a high reusability for any operating sequence optimization problem in electronic or semiconductor manufacturing industry, as well as in other fields. (C) 2006 Elsevier Ltd. All rights reserved.

关键词： manufacturing distributed simulation optimization

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KASSANDRA: A framework for distributed simulation of heterogeneous cooperating objects

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JOURNAL OF SYSTEMS ARCHITECTURE 2017年 73卷 28-41页

作者： Figura, Richard Shih, Chia-Yen Ceriotti, Matteo Fu, Songwei Brockmann, Falk Nebot, Hector Alarcon, Francisco Kropp, Andrea Kondak, Konstantin Schwarzbach, Marc Jimenez, Antidio Mulero-Pazmany, Margarita Dini, Gianluca Capitan, Jesus Marron, Pedro Jose Univ Duisburg Essen Fac Business Adm & Econ Dept Comp Sci & Business Informat Syst ICB Networked Embedded Syst Grp Schutzenbahn 70 D-45117 Essen Germany ETRA Res & Dev Tres Forques 147 Valencia 46014 Spain Ctr Adv Aerosp Technol CATEC C Wilbur & Orville Wright 17-19-21 Seville 41309 Spain Leonardo Finmeccan Spa Piazza Monte Grappa 4 I-00195 Rome Italy German Aerosp Ctr DLR Inst Robot & Mechatron RMC D-82234 Oberpfaffenhofen Wessling Germany CSIC Estn Biol Donana C Amer Vespucio S-N Seville 41092 Spain Univ Tcn Particular Loja Dept Nat Sci San Cayetano Alto Loja Ecuador Univ Pisa Dept Ingn Informaz Via Girolamo Caruso 16 I-56122 Pisa Italy Univ Seville Dept Ingn Sistemas & Automat Escuela Super Ingn Camino Descubrimientos S-N Seville 41092 Spain

To address the heterogeneity and scalability issues of simulating Cooperating Objects (COs) systems, we propose KASSANDRA, a conceptual framework for enabling distributed COs simulation by integrating existing simulation tools. Moreover, KASSANDRA exploits the communication middleware used by real-world COs as underlying communication mechanism for integrating KASSANDRA-enabled simulation tools. In this way, real-world COs can be included with simulated objects in a seamless way to perform more accurate system performance evaluation. Moreover, such a hardware-in-the-loop approach is not limited to pre deployment performance analysis, and can offer possibilities to analyse performance at different phases of CO applications. The concept of KASSANDRA has been carried out in the EU PLANET project. In this paper, we introduce the KASSANDRA framework components and show their interactions at different phases for node deployments in PLANET use cases. The result demonstrates the applicability of KASSANDRA to facilitate the development of CO applications. (C) 2016 Elsevier B.V. All rights reserved.

关键词： Heterogeneous simulation distributed simulation Hardware in the loop simulation Live debugging of distributed systems Cooperating objects

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Supply chain distributed simulation: An efficient architecture for multi-model synchronization

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simulation MODELLING PRACTICE AND THEORY 2007年第3期15卷 221-236页

作者： Iannone, Raffaele Miranda, Salvatore Riemma, Stefano Univ Salerno Dept Mech Engn I-84084 Fisciano SA Italy

The growing interest in evaluating the overall performance of supply chains leads further and further towards the development of complex simulation models able to answer unsolved questions. In particular, distributed simulation represents one of the tools most frequently used to observe the behaviour of supply chains in order to highlight its lack of efficiency and evaluate new management solutions in a relatively short time. distributed simulation, however, requires resort to complex platforms, necessary for coordinated time advancing and information exchange management. The technological complexity of these platforms represents a strong limit to the diffusion of this tool in supply chain studies, which, on the contrary, evidence the necessity to develop more simplified methodologies. The paper proposes an efficient architecture (SYNCHRO) which is able to synchronize, simply and securely, simulation models which are located in different geographical areas. The architecture, developed by the authors, has been tested to establish its efficiency when using a variable number of connected units and has demonstrated it can be successfully applied in supply chain contexts. (C) 2006 Elsevier B.V. All rights reserved.

关键词： supply chain management distributed simulation synchronization architecture

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