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Symposium on Problems in the Optimization of Data Communications Systems最新文献

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Traffic and delay in a circular data network 循环数据网络中的流量和延迟
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811060
J. Hayes, D. Sherman
{"title":"Traffic and delay in a circular data network","authors":"J. Hayes, D. Sherman","doi":"10.1145/800281.811060","DOIUrl":"https://doi.org/10.1145/800281.811060","url":null,"abstract":"The operation and traffic behavior of a data transmission system using a loop topology are studied. A mathematical model is developed for evaluating system load and buffer delay. This model accommodates an arbitrary number of stations for a symmetric traffic pattern. Intrinsic to the model is a recognition of the bursty nature of data sources. Other factors that are taken into account are line and source rates as well as the blocking of data into fixed-size packets. Formulas are derived from which approximations to average message delay induced by traffic in the loop (a critical parameter in buffered systems) can be calculated.\u0000 The results of the study are presented in a set of curves where normalized delay due to traffic within specific system configurations is plotted as a function of the number of stations and source activity. Simulation results for single loops of 5 and 50 stations are presented which indicate good agreement with the analytical approaches. A major conclusion is that, in certain quite reasonable circumstances, the delay is not large even for high line activity.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123062936","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: 3
Optical links for communications in local distribution 本地分配通信用光链路
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811058
D. Gan
{"title":"Optical links for communications in local distribution","authors":"D. Gan","doi":"10.1145/800281.811058","DOIUrl":"https://doi.org/10.1145/800281.811058","url":null,"abstract":"In the design of optical communication links for local distribution, two important aspects, which must be considered, are atmospheric transmission effects and detection techniques used in the receiver.\u0000 Basic relationships for atmospheric absorption and scattering are reviewed, after which received signal variations observed on a Datran optical test link are briefly discussed.\u0000 Direct and heterodyne detection techniques are reviewed and detailed expressions for shot-noise and thermal-noise limited cases are given. Shot-noise-limited detection is concluded to be more sensitive but is presently employed less in receivers.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127922448","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
Reliability considerations in centralized computer networks 集中式计算机网络的可靠性考虑
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811059
E. Hänsler, G. McAuliffe, R. Wilkov
{"title":"Reliability considerations in centralized computer networks","authors":"E. Hänsler, G. McAuliffe, R. Wilkov","doi":"10.1145/800281.811059","DOIUrl":"https://doi.org/10.1145/800281.811059","url":null,"abstract":"This paper deals with a heuristic procedure for optimizing the reliability of computer networks consisting of clusters of terminals connected to remote concentrators which are connected to a data processing center. The expected percentage of terminals connected to the processing center is used as a measure of network reliability. It is shown that configurations other than the frequently used star are often considerably more reliable and less expensive.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127420705","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
The Data Reconfiguration Service—an experiment in adaptable, process/process communication 数据重构服务——一个可适应的过程/过程通信的实验
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811046
R. Anderson, E. Harslem, J. Heafner, V. Cerf, J. Madden, R. Metcalfe, A. Shoshani, James E. White, D. Wood
{"title":"The Data Reconfiguration Service—an experiment in adaptable, process/process communication","authors":"R. Anderson, E. Harslem, J. Heafner, V. Cerf, J. Madden, R. Metcalfe, A. Shoshani, James E. White, D. Wood","doi":"10.1145/800281.811046","DOIUrl":"https://doi.org/10.1145/800281.811046","url":null,"abstract":"Application programs require specific I/O data formats that differ from program to program. One approach recently adopted for providing resource sharing of disparate programs is to develop specific dialogs for classes of programs. Each such program must then be retrofitted with one of the standard dialog interfaces. The DRS exhibits a different view of coupling variegated processes and terminals.\u0000 The DRS attempts to provide a notation for form definition tailored to some specifically needed instances of data reformatting. At the same time, the DRS keeps the notation and its underlying implementation within some utility range that is bounded on the lower end by a notation expressive enough to make the experimental service useful, and bounded on the upper end by a notation short of a general-purpose programming language.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132159068","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
State Integrated Information Net (SIINET) a concept 国家综合信息网(SIINET)是一个概念
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811065
D. Nowakoski
{"title":"State Integrated Information Net (SIINET) a concept","authors":"D. Nowakoski","doi":"10.1145/800281.811065","DOIUrl":"https://doi.org/10.1145/800281.811065","url":null,"abstract":"Requirements for rapid and timely information about the internal operations of State Governments have grown rapidly. A number of applicable techniques have evolved from extensive Department of Defense research and development programs and industrial development projects. These techniques lend themselves to adaptations which apply directly to the State problems.\u0000 One configuration is an adaptive interactive network with a mix of hardware and disciplines. A suggested system which meets these needs is the State Integrated Information Net (SIINET). It would contain an array of value engineered and performance engineered dedicated subsystems, properly sized computers, appropriately engineered data storage and retrieval, and human engineered terminal configurations.\u0000 A general discussion of SIINET is given including special provisions such as protection of special access data bases. Three potential major components of SIINET are treated as specific examples. These are the State Record Information System (SRIS), the Ecological Monitor and Control System (EMCS), and the State Crime Information System (SCIS).","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117017186","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
ASCII extension and expansion and their impact on data communications ASCII扩展和扩展及其对数据通信的影响
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811056
T. F. Fitzsimons
{"title":"ASCII extension and expansion and their impact on data communications","authors":"T. F. Fitzsimons","doi":"10.1145/800281.811056","DOIUrl":"https://doi.org/10.1145/800281.811056","url":null,"abstract":"During the past several years, a subcommittee within the American National Standard Institute Committee on Computers and Information Processing has been working on a standard that will impact computer communications. The proposed Standard is on: An Eight-Bit Code for General Information Interchange and Code Extension Procedures for 7 and 8-Bit Codes. This paper presents the historical background to this effort, the current proposals before the subcommittee and the potential impact on data communications of the proposed standardization. Also discussed is one view point of how this proposed standard and other standards (proposed and extant) interrelate with one another in a computer based communications system.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121004560","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
Message Format Principles 消息格式原则
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811072
G. White
{"title":"Message Format Principles","authors":"G. White","doi":"10.1145/800281.811072","DOIUrl":"https://doi.org/10.1145/800281.811072","url":null,"abstract":"The transmission of data, telegrams or narrative messages (record material) over the facilities of one or more telecommunication networks, requires agreed-to message formats for traffic handling over these networks. This paper is designed to be a definitive discussion of the principles to be used for developing message formats. It is based upon the current efforts of American National Standards Institute Task Group X3S33, Message Header Formats.\u0000 The subject of Message Format Principles no doubt connotes various things to various people. For example, it would have a certain significance to a person who has spent a lifetime in the communications world, while a person in another field would wonder what the subject was all about. With this in mind, it seems appropriate to define some of the terms which will be used in this paper. Each individual may not wholly agree with each definition. But if everyone will accept them for the purposes of this paper, we should better be able to understand the meaning of the “message.”","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128563665","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
The Datran network Datran网络
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811055
C. R. Fisher, R. Sligh
{"title":"The Datran network","authors":"C. R. Fisher, R. Sligh","doi":"10.1145/800281.811055","DOIUrl":"https://doi.org/10.1145/800281.811055","url":null,"abstract":"The Datran system is a nationwide all digital switched network which will initially link subscriber terminals in 35 metropolitan areas. It will consist of three distinct elements: a nationwide high-capacity microwave trunking system, computer controlled switching center and local distribution systems especially configured for each of the 35 metropolitan areas. Together these elements will result in an end-to-end network which avoids reliance on existing analog facilities.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116434875","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: 3
World data communications as seen by the Data Processing Systems designer 数据处理系统设计者所看到的世界数据通信
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811064
George J. Lissandrello
{"title":"World data communications as seen by the Data Processing Systems designer","authors":"George J. Lissandrello","doi":"10.1145/800281.811064","DOIUrl":"https://doi.org/10.1145/800281.811064","url":null,"abstract":"Developments of national and international communication served Data Processing Systems is dependent upon not only the availability of facilities, but on the economics involved. The paper shows in graphic form the differences in the tariff structures in the countries and also a comparison of break-even costs when it is economically justified to lease telegraph or telephone lines versus utilizing the telex or the telephone switched facility.\u0000 There will also be a comparison of available facilities by country, leased point-to-point, leased multipoint, switched telephone and telex. Included in this paper will be a comparison of attachment policies and a summary status of the remote computing services.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114576322","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
The design of a switching system to allow remote access to computer services by other computers and terminal devices 交换系统的设计，允许其他计算机和终端设备远程访问计算机服务
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1900-01-01 DOI: 10.1145/800281.811068
R. Scantlebury, P. T. Wilkinson
{"title":"The design of a switching system to allow remote access to computer services by other computers and terminal devices","authors":"R. Scantlebury, P. T. Wilkinson","doi":"10.1145/800281.811068","DOIUrl":"https://doi.org/10.1145/800281.811068","url":null,"abstract":"An experimental store-and-forward data communication network has been set up within the National Physical Laboratory (NPL) site. The system represents one element of a national data network scheme proposed by NPL.\u0000 The network is currently offering a data communication service on a trial basis and is operating successfully.\u0000 Work on an enhanced communication system is in hand. This new system has been organised along strictly hierarchical lines and is intended to meet the requirements of computer to computer communications in a general manner, permitting resource-sharing applications and remote-access computer services to be developed in the Laboratory.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134605190","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: 18
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