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Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)最新文献

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Management of QoS and data freshness in RTDBSs using feedback control scheduling and data versions 使用反馈控制调度和数据版本管理rtdbs中的QoS和数据新鲜度
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.32
Emna Bouazizi, Claude Duvallet, B. Sadeg
{"title":"Management of QoS and data freshness in RTDBSs using feedback control scheduling and data versions","authors":"Emna Bouazizi, Claude Duvallet, B. Sadeg","doi":"10.1109/ISORC.2005.32","DOIUrl":"https://doi.org/10.1109/ISORC.2005.32","url":null,"abstract":"These recent years, a lot of real-time applications are becoming increasingly sophisticated in their data needs, resulting in a greater demand for real-time data services. Real-time database systems (RTDBS) can manage these applications, but the workload in these systems is unpredictable, then RTDBS may become overloaded. A lot of work dealing with quality of service (QoS) has been done to control the transient overshoot. They are based on feedback control real-time scheduling theory. In this paper, we propose a work which allows to execute transactions before their deadlines while using the fresh data. We have extended the feedback-based miss ratio control, by using a multi versions data architecture to guarantee a set of requirements on the behavior of RTDBS and we have considered two data management policies. In the first policy, we have limited the maximum number of data versions and this number is the same for all the data items. In the second policy, the number is dynamically adjusted for each data item.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121535679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Revisiting COTS middleware for DRE systems 重新审视DRE系统的COTS中间件
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.46
J. Hugues, L. Pautet, F. Kordon
{"title":"Revisiting COTS middleware for DRE systems","authors":"J. Hugues, L. Pautet, F. Kordon","doi":"10.1109/ISORC.2005.46","DOIUrl":"https://doi.org/10.1109/ISORC.2005.46","url":null,"abstract":"Distributed real-time embedded systems (DRE) increasingly rely on COTS middleware to meet their distribution needs. Yet, there is a technology gap between the design of COTS middleware and the high-integrity constraints of real-time engineering. This puts a limit on the adoption of middleware by system families such as space or avionics. In this paper, we present our current work on the \"schizophrenic middleware architecture\", a highly tailorable middleware architecture, and its implementation PolyORB. We illustrate how it allows for support of real-time engineering guidelines, enforces determinism, allows for modeling and verification.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133921668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Secure Web services for low-cost devices 低成本设备的安全Web服务
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.50
J. Helander, Yong Xiong
{"title":"Secure Web services for low-cost devices","authors":"J. Helander, Yong Xiong","doi":"10.1109/ISORC.2005.50","DOIUrl":"https://doi.org/10.1109/ISORC.2005.50","url":null,"abstract":"This paper describes how to use XML Web services and public key cryptography on small devices in consumer settings to achieve a high level of interoperation and security. This is done while maintaining the strict performance requirements that are expected from low-cost devices operating with limited energy and other resources.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122509926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
An approach for designing highly adaptable process-control systems 一种设计高适应性过程控制系统的方法
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.10
Dongfeng Wang, F. Bastani, I. Yen, R. Paul
{"title":"An approach for designing highly adaptable process-control systems","authors":"Dongfeng Wang, F. Bastani, I. Yen, R. Paul","doi":"10.1109/ISORC.2005.10","DOIUrl":"https://doi.org/10.1109/ISORC.2005.10","url":null,"abstract":"Process-control systems usually deal with changeable environments so that high adaptability of these systems is required. After a process-control system has been implemented and deployed, it is not an easy task to adapt the system to satisfy new requirements. Considering this problem, we propose the use of relational program architectures to design process-control systems for high adaptability. With the relational program architecture, a process-control system is designed to be the composition of several Independently Developable End-user Assessable Logical (IDEAL) components through pre-defined composition patterns. Each IDEAL component is associated with several end-user visible properties and can be solved and validated in its restricted \"view\" of the system, i.e., it can be designed and implemented independently, and can be tested or verified by the end-user independently. In addition, the system level properties (safety, stability, and reliability) can be inferred from the individual IDEAL components mathematically. The relational program architecture can provide not only the ultra-high dependability assurance of a process-control system, but can also make the system highly adaptable. We propose several principles, by which we can accurately determine which components of the system need to be adapted and how to adapt them after the system's requirement has changed. These principles can be evolved to automated tool support.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124227319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Dynamic real-time reconfiguration in distributed systems: timing issues and solutions 分布式系统中的动态实时重构:时间问题和解决方案
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.25
U. Brinkschulte, E. Schneider, F. Picioroaga
{"title":"Dynamic real-time reconfiguration in distributed systems: timing issues and solutions","authors":"U. Brinkschulte, E. Schneider, F. Picioroaga","doi":"10.1109/ISORC.2005.25","DOIUrl":"https://doi.org/10.1109/ISORC.2005.25","url":null,"abstract":"Dynamic software reconfiguration is a useful tool to adapt and maintain software systems. In most approaches, the system has to be stopped while the reconfiguration is in progress. This is not suitable for real-time systems, even on small-embedded systems. Timing constraints must be met even while the system is reconfiguring. Our approach is based on the real-time middleware OSA+. Our main objective is to be able to reconfigure services during run-time, with a predictable and predefined blackout time (the time the systems does not react due to the reconfiguration). Three different approaches concerning the blocking or non-blocking state of a service are presented. These approaches can be used to realize a tradeoff between the reconfiguration time and the blackout time.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125193194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Classification of WCET analysis techniques WCET分析技术的分类
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.19
R. Kirner, P. Puschner
{"title":"Classification of WCET analysis techniques","authors":"R. Kirner, P. Puschner","doi":"10.1109/ISORC.2005.19","DOIUrl":"https://doi.org/10.1109/ISORC.2005.19","url":null,"abstract":"Worst-case execution time (WCET) analysis has become an active research area over the last decade. Various techniques have been developed to improve the WCET calculation methods for numerous features of the hardware. In parallel, attention has been paid to integrate the analysis techniques into modern software engineering processes. In this paper we give an overview about the different aspects of WCET analysis. We clarify terms and categorise features of WCET analysis tools. Therefore we present a generic framework for WCET analysis and describe its fundamental operations. We present a classification scheme to test the applicability of WCET analysis tools for certain analysis requirements.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125641119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 50
Acquaintance-based protocol for detecting multimedia objects in peer-to-peer overlay networks 点对点覆盖网络中基于熟人的多媒体对象检测协议
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.6
Kenichi Watanabe, T. Enokido, M. Takizawa, K. H. Kim
{"title":"Acquaintance-based protocol for detecting multimedia objects in peer-to-peer overlay networks","authors":"Kenichi Watanabe, T. Enokido, M. Takizawa, K. H. Kim","doi":"10.1109/ISORC.2005.6","DOIUrl":"https://doi.org/10.1109/ISORC.2005.6","url":null,"abstract":"Multimedia objects are distributed on peer computers (peers) in peer-to-peer (P2P) overlay networks. An application has to find target peers which can support enough quality of service (QoS) of multimedia objects. We discuss types of acquaintance relations of peers with respect to what objects each peer holds, can manipulate, and can grant access rights. We discuss a new type of flooding algorithm to find target peers based on charge and acquaintance concepts so that areas in networks where target peers are expected to exist are more deeply searched. We evaluate the charge-based flooding algorithm compared with a TTL-based flooding algorithm in terms of the number of messages transmitted in networks.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"429 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122869370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Two alternative RMI models for real-time distributed applications 实时分布式应用程序的两种可选RMI模型
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.62
D. Tejera, Ruth Tolosa, M. D. Miguel, A. Alonso
{"title":"Two alternative RMI models for real-time distributed applications","authors":"D. Tejera, Ruth Tolosa, M. D. Miguel, A. Alonso","doi":"10.1109/ISORC.2005.62","DOIUrl":"https://doi.org/10.1109/ISORC.2005.62","url":null,"abstract":"Java's popularity, facilities and platform independence have made it an interesting language for the real time community. The RTSJ (real-time specification for Java) is a Java extension to allow the development of real-time systems. RTSJ does not supply any support for the development of real-time distributed systems. The goal of this work is to define support for this type of systems, based on RMI (remote method invocation). However, the high diversity of real-time systems implies that there is not a single RT-RMI definition that satisfies their requirements. This article presents the basics of two real-time RMI approaches: safety critical RMI, to support hard real-time and high integrity requirements, and quality of service RMI for soft real-time systems, which is based on resource reservation to provide some minimal required quality.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129402177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
An object-oriented platform-based design process for embedded real-time systems 基于面向对象平台的嵌入式实时系统设计过程
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.13
M. A. Wehrmeister, L. Becker, F. Wagner, C. Pereira
{"title":"An object-oriented platform-based design process for embedded real-time systems","authors":"M. A. Wehrmeister, L. Becker, F. Wagner, C. Pereira","doi":"10.1109/ISORC.2005.13","DOIUrl":"https://doi.org/10.1109/ISORC.2005.13","url":null,"abstract":"The growing complexity of today's embedded real-time systems demands new methods and tools in order to manage the problems of design, analysis, integration and validation of complex systems. This paper describes an object-oriented platform-based design process for real-time embedded systems. The proposed approach promotes a smooth transition from high-level UML specification to implementation, which is composed by hardware and software components. The transition from higher to lower abstraction levels is facilitated by the use of an OO realtime API, whose underlying facilities can be optimized according to the application needs and selected platform. An integrated toolset is used to support the intermediate steps of the design process. In order to illustrate the proposed approach and related toolset the design of an embedded real-time automation system for an \"intelligent\" wheelchair is presented.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116320858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Architectural assessment of embedded systems using aspect-oriented programming principles 使用面向方面编程原理的嵌入式系统的体系结构评估
Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05) Pub Date : 2005-05-18 DOI: 10.1109/ISORC.2005.14
Phillip Schmidt, J. Milstein, S. Alvarado
{"title":"Architectural assessment of embedded systems using aspect-oriented programming principles","authors":"Phillip Schmidt, J. Milstein, S. Alvarado","doi":"10.1109/ISORC.2005.14","DOIUrl":"https://doi.org/10.1109/ISORC.2005.14","url":null,"abstract":"Although early and thorough assessment of requirements prior to design is a beneficial goal, our current experience in assessing embedded, real-time architectures is that such an approach is rarely completed satisfactorily. Given this situation, the Realtime Embedded Architecture-Centric Testbed (REACT) was developed to assess contractor-developed, object-oriented software architectures during their evolution in order to reduce technical and programmatic risks. This paper presents some results in applying REACT's aspect-oriented assessment approach to large space systems. The approach was highly effective in diagnosing architectural problems of complex, evolving, and often handicapped, real-time embedded systems.","PeriodicalId":377002,"journal":{"name":"Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'05)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125700942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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