Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)最新文献_第4页

Hierarchical feedback adaptation for real time sensor-based distributed applications 基于实时传感器的分布式应用分层反馈自适应

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839527

M. Cardei, I. Cardei, R. Jha, A. Pavan

引用次数: 14

A large scale distributed object architecture-CORBA and COM for real time systems 面向实时系统的大规模分布式对象体系结构——corba和COM

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839548

E. Chang, D. Annal, F. Grunta

引用次数: 11

End-to-end predictability in real-time push-pull communications 实时推拉通信的端到端可预测性

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839541

K. Juvva

{"title":"End-to-end predictability in real-time push-pull communications","authors":"K. Juvva","doi":"10.1109/ISORC.2000.839541","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839541","url":null,"abstract":"Push-pull communications is a real-time middleware service that has been implemented on top of a resource kernel operating system. It is a many-to-many communication model that can support multi-participant real-time applications. It covers both \"push\" (publisher/subscriber model) and \"pull\" (data transfer initiated by a receiver) communications. Unlike the publisher/subscriber model, different publishers and subscribers can operate at different data rates and also can choose another (intermediate) node to act as their proxy and deliver data at their desired frequency. We specifically address end-to-end predictability of the push-pull model. The scheduling mechanisms in the OS, the middleware architecture and the underlying network QoS support can impact the timeliness of data. We obtain our end-to-end timeliness and bandwidth guarantees by using a resource kernel offering CPU reservations and the use of a guaranteed bandwidth network (DARWIN) between push-pull end-points. We formally analyze the problem of choosing an optimal proxy location within a network. We discuss our implementation of this system and carry out a detailed performance evaluation on an integrated RT-Mach-Darwin testbed at Carnegie Mellon. Our results open up interesting research directions for the scheduling of computation and communication resources for the applications using the push-pull service. The push-pull framework can easily be incorporated in an RT-CORBA Event Service model.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121897230","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: 0

A proposed initial approach to distributed real-time Java 分布式实时Java的初步建议方法

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839505

E. Jensen

{"title":"A proposed initial approach to distributed real-time Java","authors":"E. Jensen","doi":"10.1109/ISORC.2000.839505","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839505","url":null,"abstract":"The process of defining requirements for \"real-time Java\" and subsequently the two competing specifications for it, began with considerable thought by the participants about what the term \"real-time Java\" could and should mean. Now two corresponding requirements and specification processes have begun for distributed real-time Java. This paper summarizes some ideas about that term and an initial approach to a specification. The approach is based on providing a natural and minimal mechanistic extension to Remote Method Invocation (RMI) that facilitates real-time distributed computing in general and real-time distributed (in the sense of trans-node) programming in particular. Here, \"real-time RMI\" is not defined as \"real fast\" or even \"real predictable\" RMI (although those are both important attributes). Instead, it means that the timeliness properties of computational entities are preserved when the entities perform RMIs and RETURNs that span physical nodes. A similar approach has been proven effective in several other distributed real-time contexts, and is a primary feature of the unified proposal to OMG for dynamic real-time CORBA.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127954965","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: 12

Resource-conscious customization of CORBA for CAN-based distributed embedded systems 基于can的分布式嵌入式系统CORBA的资源意识定制

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839509

Kimoon Kim, Gwangil Jeon, Seongsoo Hong, Sunil Kim, Tae-hyung Kim

{"title":"Resource-conscious customization of CORBA for CAN-based distributed embedded systems","authors":"Kimoon Kim, Gwangil Jeon, Seongsoo Hong, Sunil Kim, Tae-hyung Kim","doi":"10.1109/ISORC.2000.839509","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839509","url":null,"abstract":"While recently emerging middleware technologies such as CORBA and DCOM address the complexity of distributed programming, they cannot be directly applied to distributed control system design due to their excessive resource demand and inadequate communication models. We propose a new CORBA design for CAN-based distributed embedded control systems. Our design goal is to minimize its resource need and make it support group communication without losing the IDL (interface definition language) level compliance to the OMG standards. To achieve this, we develop a transport protocol on the CAN and a group communication scheme based on the well-known publisher/subscriber model. The protocol effectively realizes subject-based addressing and supports anonymous publisher/subscriber communication. We also customize the method invocation and message passing protocol, referred to as the general inter-ORB protocol (GIOP), of CORBA so that CORBA method invocations are efficiently serviced on a low-bandwidth network such as the CAN. This customization includes packed data encoding and variable-length integer encoding for compact representation of IDL data types. The new CORBA design clearly demonstrates that it is feasible to use CORBA in developing distributed embedded systems on real-time networks possessing severe resource limitations.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121997325","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: 28

Benchmarking real-time distributed object management systems for evolvable and adaptable command and control applications 为可进化和可适应的命令和控制应用程序测试实时分布式对象管理系统

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839530

R. Freedman, J. Maurer, Steven Wohlever, B. Thuraisingham, V. Wolfe, M.K.J. Milligan

{"title":"Benchmarking real-time distributed object management systems for evolvable and adaptable command and control applications","authors":"R. Freedman, J. Maurer, Steven Wohlever, B. Thuraisingham, V. Wolfe, M.K.J. Milligan","doi":"10.1109/ISORC.2000.839530","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839530","url":null,"abstract":"The paper describes benchmarking for evolvable and adaptable real time command and control systems. MITRE's Evolvable Real-Time C3 initiative developed an approach that would enable current real time systems to evolve into the systems of the future. We designed and implemented an infrastructure and data manager so that various applications could be hosted on the infrastructure. Then we completed a follow-on effort to design flexible adaptable distributed object management systems for command and control (C2) systems. Such an adaptable system would switch scheduling algorithms, policies, and protocols depending on the need and the environment. Both initiatives were carried out for the United States Air Force. One of the key contributions of the work is the investigation of real time features for distributed object management systems. Partly as a result of our work we are now seeing various real time distributed object management products being developed. In selecting a real time distributed object management systems, we need to analyze various criteria. Therefore, we need benchmarking studies for real time distributed object management systems. Although benchmarking systems such as Hartstone and Distributed Hartstone have been developed for middleware systems, these systems are not developed specifically for distributed object based middleware. Since much of our work is heavily based on distributed objects, we developed benchmarking systems by adapting the Hartstone system. The paper describes our efforts in developing benchmarks.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127781321","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: 1

Asynchronous checkpointing protocol for object-based systems 面向对象系统的异步检查点协议

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839533

Katsuya Tanaka, M. Takizawa

引用次数: 0

Intelligent scheduling based on start time adjustment for advanced sequential control systems 先进顺序控制系统中基于启动时间调整的智能调度

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839521

T. Aizono, T. Kikuno

{"title":"Intelligent scheduling based on start time adjustment for advanced sequential control systems","authors":"T. Aizono, T. Kikuno","doi":"10.1109/ISORC.2000.839521","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839521","url":null,"abstract":"High productivity is required for industrial systems that are to produce large amounts of low-price products. Most industrial systems are sequentially controlled because materials and parts are processed and constructed step by step. A new method of sequential control is needed to increase productivity, and a new technique to schedule the start time of each process is also needed because of frequent adjustment of production lines and their equipment. Intelligent devices such as intelligent sensors and actuators used in the latest industrial systems have embedded high-performance processors and contain software modules. These devices cooperate and control processing robots and production lines. Advanced sequential control is proposed for sequential control systems consisting of distributed software modules. Processing time can be minimized and productivity increased by intelligent scheduling for advanced sequential control, and this paper describes a new method for adjusting the starting times of production processes automatically. This method shortens the time margin and decreases the total processing time. This paper also describes a processing flow diagram that makes it easy to adjust the starting time of each process. The effectiveness of this intelligent scheduling and start-time-adjustment has been demonstrated by using them to optimize the operation of a system for testing disk plates.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116828754","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: 1

A resource management framework for adaptive middleware 用于自适应中间件的资源管理框架

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839531

H. Duran-Limon, G. Blair

引用次数: 20

Load balancing to improve dependability and performance for program objects in distributed real-time co-operation over the Internet 负载平衡以提高Internet上分布式实时协作中程序对象的可靠性和性能

Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607) Pub Date : 2000-03-15 DOI: 10.1109/ISORC.2000.839520

Allan K. Y. Wong, T. Dillon

{"title":"Load balancing to improve dependability and performance for program objects in distributed real-time co-operation over the Internet","authors":"Allan K. Y. Wong, T. Dillon","doi":"10.1109/ISORC.2000.839520","DOIUrl":"https://doi.org/10.1109/ISORC.2000.839520","url":null,"abstract":"The aim of this project is to improve the fault-tolerant data communication setup that we proposed previously. From the verification tests for this setup, which integrates two basic schemes, we observed that performance could be very sluggish sometimes, due to time constraints imposed by problematic routing among communicating objects and possible message retransmissions. These constraints, if not relaxed, would restrict the possibility of building useful object-based real-time systems over the Internet. The two schemes in the extant setup are namely (a) consecutive message transmissions to improve the communication reliability, and (b) adaptive buffer management to prevent message losses at the reception side due to buffer overflow. Careful analyses of the previous test data have revealed that inclusion of load balancing would make the setup more responsive. With this motivation in mind, a load-balancing model is proposed in this paper. The different experiments in this project involved both local and remote Internet sites. The preliminary test results indicate that the proposed load balancing scheme can indeed enhance system responsiveness by relaxing time constraints. Therefore, further work and deeper investigations in the same direction are worthwhile.","PeriodicalId":127761,"journal":{"name":"Proceedings Third IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC 2000) (Cat. No. PR00607)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114582845","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: 11