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Awareness-based communication management in the MASSIVE systems MASSIVE系统中基于感知的通信管理
Distributed Syst. Eng. Pub Date : 1998-09-01 DOI: 10.1088/0967-1846/5/3/006
C. Greenhalgh
{"title":"Awareness-based communication management in the MASSIVE systems","authors":"C. Greenhalgh","doi":"10.1088/0967-1846/5/3/006","DOIUrl":"https://doi.org/10.1088/0967-1846/5/3/006","url":null,"abstract":"The MASSIVE-1 and MASSIVE-2 distributed virtual environment systems are based on an explicit model of user communication requirements known as the spatial model of interaction; this model addresses the general issue of managing communication in large space-based systems such as DVEs. The goals of the spatial model are to guide the distribution and presentation of information in a way which facilitates collaboration between participants (based on observed patterns of interaction in real-world environments) and which is also efficient and appropriate. The MASSIVE-1 system emphasized the spatial model's `aura' concept as the basis for a distinct shared service in an otherwise wholly unicast peer-to-peer system. This approach was effective for relatively small systems but could not be extended to make general use of multicast communication (to reduce total bandwidth requirements). The MASSIVE-2 system added the concept of `third-party objects' which support the definition and management of multiple multicast groups for updates and continuous media distribution.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127695642","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: 51
DEE: an architecture for distributed virtual environment gaming 分布式虚拟环境游戏的架构
Distributed Syst. Eng. Pub Date : 1998-09-01 DOI: 10.1088/0967-1846/5/3/004
S. Powers, M. Hinds, J. Morphett
{"title":"DEE: an architecture for distributed virtual environment gaming","authors":"S. Powers, M. Hinds, J. Morphett","doi":"10.1088/0967-1846/5/3/004","DOIUrl":"https://doi.org/10.1088/0967-1846/5/3/004","url":null,"abstract":"This paper presents a distributed virtual environment architecture targeted specifically at network games. It outlines the requirements for supporting a game genre known as graphical multi-user dungeons or dimensions, and shows how these requirements can be met by a novel approach to the distribution of the game environment model. An implementation of the architecture is covered, together with the initial conclusions drawn from the implementation process.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129598745","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: 10
SmallTool - a toolkit for realizing shared virtual environments on the Internet SmallTool -一个在Internet上实现共享虚拟环境的工具包
Distributed Syst. Eng. Pub Date : 1998-09-01 DOI: 10.1088/0967-1846/5/3/005
W. Broll
{"title":"SmallTool - a toolkit for realizing shared virtual environments on the Internet","authors":"W. Broll","doi":"10.1088/0967-1846/5/3/005","DOIUrl":"https://doi.org/10.1088/0967-1846/5/3/005","url":null,"abstract":"With increasing graphics capabilities of computers and higher network communication speed, networked virtual environments have become available to a large number of people. While the virtual reality modelling language (VRML) provides users with the ability to exchange 3D data, there is still a lack of appropriate support to realize large-scale multi-user applications on the Internet. In this paper we will present SmallTool, a toolkit to support shared virtual environments on the Internet. The toolkit consists of a VRML-based parsing and rendering library, a device library, and a network library. This paper will focus on the networking architecture, provided by the network library - the distributed worlds transfer and communication protocol (DWTP). DWTP provides an application-independent network architecture to support large-scale multi-user environments on the Internet.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120937978","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: 20
DIVE: a scaleable network architecture for distributed virtual environments DIVE:分布式虚拟环境的可扩展网络架构
Distributed Syst. Eng. Pub Date : 1998-09-01 DOI: 10.1088/0967-1846/5/3/002
E. Frécon, Mårten Stenius
{"title":"DIVE: a scaleable network architecture for distributed virtual environments","authors":"E. Frécon, Mårten Stenius","doi":"10.1088/0967-1846/5/3/002","DOIUrl":"https://doi.org/10.1088/0967-1846/5/3/002","url":null,"abstract":"We introduce the network software architecture of the distributed interactive virtual environment platform. The platform is designed to scale with a large number of simultaneous participants, while ensuring maximum interaction at each site. Scalability is achieved by making extensive use of multicast techniques and by partitioning the virtual space into smaller regions. We also present an application-level backbone that can connect islands of multicast-aware networks together.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122211634","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: 325
Connection-information-based connection rerouting for connection-oriented mobile communication networks 面向连接的移动通信网络中基于连接信息的连接重路由
Distributed Syst. Eng. Pub Date : 1998-06-01 DOI: 10.1088/0967-1846/5/2/001
Min-ho Song, Yanghee Choi, Chongsang Kim
{"title":"Connection-information-based connection rerouting for connection-oriented mobile communication networks","authors":"Min-ho Song, Yanghee Choi, Chongsang Kim","doi":"10.1088/0967-1846/5/2/001","DOIUrl":"https://doi.org/10.1088/0967-1846/5/2/001","url":null,"abstract":"To date, various connection rerouting methods for connection-oriented mobile networks have been proposed. The previous methods, however, are limited to specific topologies or environments. In this paper, we propose the connection-information-based rerouting widely applicable to various connection-oriented mobile networks. This method requires neither a specific topology nor a complex connection, enables fast rerouting, provides appropriate route optimality, and can be extended easily.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126461992","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
Performance engineering of the Totem group communication system 图腾群通信系统的性能工程
Distributed Syst. Eng. Pub Date : 1998-06-01 DOI: 10.1088/0967-1846/5/2/003
R. K. Budhia, L. Moser, P. Melliar-Smith
{"title":"Performance engineering of the Totem group communication system","authors":"R. K. Budhia, L. Moser, P. Melliar-Smith","doi":"10.1088/0967-1846/5/2/003","DOIUrl":"https://doi.org/10.1088/0967-1846/5/2/003","url":null,"abstract":"Group communication systems simplify the development of fault-tolerant distributed applications; however, concerns exist about the performance and overheads associated with such systems. This paper presents measurements of the performance of the Totem group communication system, operating on a single local-area network (LAN) and on multiple LANs interconnected by gateways. The Totem system runs in user space with standard commercial off-the-shelf (COTS) software and hardware. For 1 kbyte messages, a throughput of over 5000 messages per second has been measured for Totem on a single LAN, and an aggregate throughput of 10 000 messages per second has been measured for Totem on three LANs. At 2000 messages per second, the message latency is less than 3 ms. The paper also discusses some of what has been learned in engineering a group communication system for high performance.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122978111","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: 6
The Voltan application programming environment for fail-silent processes 用于故障沉默进程的Voltan应用程序编程环境
Distributed Syst. Eng. Pub Date : 1998-06-01 DOI: 10.1088/0967-1846/5/2/002
D. Black, C. Low, S. Shrivastava
{"title":"The Voltan application programming environment for fail-silent processes","authors":"D. Black, C. Low, S. Shrivastava","doi":"10.1088/0967-1846/5/2/002","DOIUrl":"https://doi.org/10.1088/0967-1846/5/2/002","url":null,"abstract":"The Voltan software library for building distributed applications provides the support for (i) a process pair to act as a single Voltan self-checking `fail-silent' process; and (ii) connection management for Voltan process communication. A Voltan fail-silent process is written by the application developer as a single threaded program. The Voltan system replicates this program transparently. The active replication of applications engenders problems when dealing with non-deterministic calculations. This paper outlines the mechanisms deployed by Voltan to deal with non-determinism. The current implementation can achieve a level of performance that is suitable for many real-time applications. The work described in this paper provides a way of solving the challenging problem of constructing fault-tolerant distributed computing systems capable of tolerating Byzantine failures, using general-purpose, low-cost components. The present practice is to employ hardware-based approaches to construct a `fail-silent' node using a self-checking processor pair working in lock-step. However, this approach is very costly in terms of the engineering effort required, and further, as processor speeds increase, keeping a pair in lock-step execution may prove difficult.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116224779","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: 20
Quality-of-service specification in distributed object systems 分布式对象系统中的服务质量规范
Distributed Syst. Eng. Pub Date : 1998-04-27 DOI: 10.1088/0967-1846/5/4/005
Svend Frølund, Jari Koistinen
{"title":"Quality-of-service specification in distributed object systems","authors":"Svend Frølund, Jari Koistinen","doi":"10.1088/0967-1846/5/4/005","DOIUrl":"https://doi.org/10.1088/0967-1846/5/4/005","url":null,"abstract":"Traditional object-oriented design methods deal with the functional aspects of systems, but they do not address quality of service (QoS) aspects such as reliability, availability, performance, security, and timing. However, deciding which QoS properties should be provided by individual system components is an important part of the design process. Different decisions are likely to result in different component implementations and system structures. Thus, decisions about component-level QoS should be made at design time, before the implementation is begun. Since these decisions are an important part of the design process, they should be captured as part of the design. We propose a general Quality-of-Service specification language, which we call QML. In this paper we show how QML can be used to capture QoS properties as part of designs. In addition, we extend UML, the de-facto standard object-oriented modeling language, to support the concepts of QML. QML is designed to integrate with object-oriented features, such as interfaces, classes, and inheritance. In particular, it allows specification of QoS properties through refinement of existing QoS specifications. Although we exemplify the use of QML to specify QoS properties within the categories of reliability and performance, QML can be used for specification within any QoS category-QoS categories are user-defined types in QML.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114416203","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: 283
Mobile Objects and Agents (MOA) 移动对象和代理(MOA)
Distributed Syst. Eng. Pub Date : 1998-04-27 DOI: 10.1088/0967-1846/5/4/007
D. Milojicic, William LaForge, Deepika Chauhan
{"title":"Mobile Objects and Agents (MOA)","authors":"D. Milojicic, William LaForge, Deepika Chauhan","doi":"10.1088/0967-1846/5/4/007","DOIUrl":"https://doi.org/10.1088/0967-1846/5/4/007","url":null,"abstract":"This paper describes the design and implementation of the Mobile Objects and Agents (MOA) project at the Open Group Research Institute. MOA was designed to support migration, communication and control of agents. It was implemented on top of the Java Virtual Machine, without any modifications to it. The initial project goals were to support communication across agent migration, as a means for collaborative work; and to provide extensive resource control, as a basic support for countering denial of service attacks. In the course of the project we added two further goals: compliance with the Java Beans component model which provides for additional configurability and customization of agent system and agent applications; and interoperability which allows cooperation with other agent systems. This paper analyzes the architecture of MOA, in particular the support for mobility, naming and locating, communication, and resource management. Object and component models of MOA are discussed and some implementation details described. We summarize the lessons learned while developing and implementing MOA and compare it to related work.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125431287","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: 102
Java transactions for the Internet Internet的Java事务
Distributed Syst. Eng. Pub Date : 1998-04-27 DOI: 10.1088/0967-1846/5/4/003
M. Little, S. Shrivastava
{"title":"Java transactions for the Internet","authors":"M. Little, S. Shrivastava","doi":"10.1088/0967-1846/5/4/003","DOIUrl":"https://doi.org/10.1088/0967-1846/5/4/003","url":null,"abstract":"The Web frequently suffers from failures which affect the performance and consistency of applications run over it. An important fault-tolerance technique is the use of atomic transactions for controlling operations on services. While it has been possible to make server-side Web applications transactional, browsers typically did not possess such facilities. However, with the advent of Java it is now possible to consider empowering browsers so that they can fully participate within transactional applications. In this paper we present the design and implementation of a standards compliant transactional toolkit for the Web. The toolkit allows transactional applications to span Web browsers and servers and supports application specific customisation, so that an application can be made transactional without compromising the security policies operational at browsers and servers.","PeriodicalId":404872,"journal":{"name":"Distributed Syst. Eng.","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123197562","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: 29
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