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Proceedings of the IEEE

Issue 11 • Date Nov. 1972

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Displaying Results 1 - 25 of 53
  • [Front cover and table of contents]

    Publication Year: 1972, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1972, Page(s):1246 - 1248
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    Freely Available from IEEE
  • On the social role of computer communications

    Publication Year: 1972, Page(s):1249 - 1253
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (602 KB)

    Computer-communication systems appear essential to meeting many needs in our society resulting from greater interdependence and complexity of operation and from rising expectations. There are, in principle, different ways of utilizing them for the same purposes, with radically different social consequences. The choice, which amounts in effect to a social decision, is, in practice, severely restric... View full abstract»

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  • Regulatory and economic issues in computer communications

    Publication Year: 1972, Page(s):1254 - 1272
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2364 KB)

    The rapid growth of computer communications in recent years has brought with it a number of difficult and controversial regulatory and economic problems. As the government agency responsible for the regulation of interstate common-carrier communications, the Federal Communications Commission (FCC) has been faced with many of these issues. This paper attempts to focus, in a tutorial fashion, upon f... View full abstract»

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  • Terminals

    Publication Year: 1972, Page(s):1273 - 1284
    Cited by:  Papers (3)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1360 KB)

    The rapid development of several different kinds of terminals and the greater ease that they offer for the use of real-time on-line systems are having a major impact on the computer industry and on computer applications. Trends that influence the increasing utilization of terminals are identified. The major subsets of the terminal market include keyboard/printer terminals, CRT terminals, "smart" t... View full abstract»

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  • Modems

    Publication Year: 1972, Page(s):1284 - 1292
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (930 KB)

    The rapidly rising need for computer communications has been met for the most part by utilization of the ever expanding network of voice-bandwidth channels. Transmission of digital signals over these analog channels involves a modem for modulation and demodulation of a voice-frequency carrier. The usual forms of amplitude, frequency, and phase modulations are described together with their basic ch... View full abstract»

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  • Errors and error control

    Publication Year: 1972, Page(s):1293 - 1301
    Cited by:  Papers (99)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (995 KB)

    In this paper the nature of errors on telephone data communications channels and the basic techniques for dealing with these errors are discussed. Results of measurements recently taken on dialed connections are reviewed, and it is observed that conventional random-error- or burst-error-correcting codes cannot assure reliable communication on these channels. More generally, it is shown qualitative... View full abstract»

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  • Line control procedures

    Publication Year: 1972, Page(s):1301 - 1312
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1430 KB)

    An exposition of the basic principles underlying data communication line control procedures is presented. Two specific line controls are then described, with special attention given to their embodiments of these principles. View full abstract»

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  • Multiplexing and concentration

    Publication Year: 1972, Page(s):1313 - 1321
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (945 KB)

    Obtaining a cost-effective teleprocessing network is postulated on efficient utilization of the communication links and processing equipment. A variety of line-sharing devices and procedures are commonly used for this purpose. The functional, economic, and application aspects of frequency-division multiplexing (FDM), synchronous time-division multiplexing (STDM), asynchronous time-division multipl... View full abstract»

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  • Communication processors

    Publication Year: 1972, Page(s):1321 - 1332
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1250 KB)

    A review is given of the use of small digital computers for the processing of data received over communication lines. A detailed discussion is presented of the hardware and software requirements of front-end processors, network processors, remote data concentrators, and message switching systems. Finally, the desirable features common to all communications processors are analyzed. Examples of actu... View full abstract»

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  • Communication software

    Publication Year: 1972, Page(s):1333 - 1341
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1045 KB)

    A tutorial introduction to the function and construction of communications software in modern teleprocessing systems is presented, Communication functions include network control, message preprocessing and queuing, and error recovery. These functions are provided by the communication subsystem, which includes components of the supervisory system, special-purpose software, and cooperating periphera... View full abstract»

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  • AT&T facilities and services

    Publication Year: 1972, Page(s):1342 - 1349
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (787 KB)

    This paper describes the U. S. telecommunications network with particular emphasis on aspects that are of importance to data- and computer-oriented services. The major portion of this network is owned and operated by the AT&T Company and the associated operating units of the Bell System as well as the independent branch of the industry. The services which the telephone network offers for data ... View full abstract»

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  • Western union digital services

    Publication Year: 1972, Page(s):1350 - 1357
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    Developments in the plans for providing a comprehensive set of dedicated and switched digital services are reviewed. Descriptions are given of the considerations which influence the decisions on the technical solutions to be used to modernize the transmission plant. The description covers long-distance transmission, local distribution, multipoint systems, store-and-forward switching, access from u... View full abstract»

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  • The Datran system

    Publication Year: 1972, Page(s):1357 - 1368
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1068 KB)

    The Datran system is designed to serve the specific needs of the data communications user. Data communications terminals almost universally employ a digital format; therefore, an early consideration was the use of digital transmission in lieu of the analog transmission employed by most conventional common-carrier systems. The location of the potential users was examined, this having an important b... View full abstract»

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  • New data networks in Europe

    Publication Year: 1972, Page(s): 1369
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (106 KB)

    This short paper, which serves as an introduction to the four papers that follow it, comments on the plans for international data communications in Europe. It points out that plans for public data networks, while understandably varying from country, to country, have a promising degree of compatibility and commonality. View full abstract»

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  • Plans and principles for public data switched networks in France

    Publication Year: 1972, Page(s):1370 - 1374
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (597 KB)

    The principles of new switched data networks planned in France are explained together with a short survey of the present state of the art. Basic techniques, offered services, compatibility with telephone, envelope concept, synchronization, and international compatibility are covered. The general ideas underlying the outline of its implementation are given but many technical details are still under... View full abstract»

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  • Plans for data communications in Germany

    Publication Year: 1972, Page(s):1374 - 1377
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB)

    The Electronic Data Switching system (EDS) and its introduction into the network of the Federal German Post Office are presented. The great demands of future data transmission will be unable to be met by conventional techniques. Therefore, special networks for data traffic are being discussed in several countries. This paper deals with the plans of the Deutsche Bundespost (Federal German Post Offi... View full abstract»

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  • Plans for a public data network in Sweden

    Publication Year: 1972, Page(s):1378 - 1381
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    At the Central Administration of Swedish Telecommunications, a study of a national public data network has been completed. The network is aimed at accommodating subscriber data-transmission speeds up to 9600 bits/s. The study shows that the network shall be of the synchronous type utilizing circuit-switching techniques with a connection time on the order of 100-200 ms. It shall provide means for a... View full abstract»

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  • Plans and ideas on the future of data communications in Switzerland

    Publication Year: 1972, Page(s):1382 - 1384
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Due to the long lifetime of telecommunication equipment, the introduction of new services such as data transmission requires careful long-range planning. Some of the considerations influencing this planning, as seen from a research laboratory in a small country, are presented in this paper. The conclusion is that data communication would best be integrated with a future digital telephone network. ... View full abstract»

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  • Topological optimization of computer networks

    Publication Year: 1972, Page(s):1385 - 1397
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1375 KB)

    Modeling, analysis, and design problems and methodologies for centralized and distributed computer-communication networks are discussed. The basic problem is to specify the location and capacity of each communication link within the network. The design objective is to provide a low-cost network which satisfies constraints on response time, throughput, reliability, and other parameters. Fundamental... View full abstract»

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  • Resource-sharing computer communications networks

    Publication Year: 1972, Page(s):1397 - 1407
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1363 KB)

    The development of resource-sharing networks can facilitate the provision of a wide range of economic and reliable computer services. Computer-communication networks allow the sharing of specialized computer resources such as data bases, programs, and hardware. Such a network consists of both the computer resources and a communications system interconnecting them and allowing their full utilizatio... View full abstract»

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  • Terminal-oriented computer-communication networks

    Publication Year: 1972, Page(s):1408 - 1423
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2025 KB)

    Four examples of currently operating computer-communication networks are described in this tutorial paper. They include the TYMNET network, the GE Information Services network, the NASDAQ over-the-counter stock-quotation system, and the Computer Sciences Infonet. These networks all use programmable concentrators for combining a multiplicity of terminals. Included in the discussion for each network... View full abstract»

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  • A case study: Airlines reservations systems

    Publication Year: 1972, Page(s):1423 - 1431
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (987 KB)

    The historical development of airlines reservations systems is traced. Characteristics are defined which are those of any real-time, conversational, highly interactive system. The structure of the system is described--agent terminal area, communications facilities, and central site. Lessons learned in the design, development, testing, implementation, and tuning of two generations of systems are di... View full abstract»

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  • A method toward improved convergence of moment-method solutions

    Publication Year: 1972, Page(s):1436 - 1437
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (251 KB)

    A technique for improving the convergence of moment-method solutions through the use of a priori knowledge is presented. The idea is that known good approximations such as physical-optics current may be subtracted from the unknown total current with the result that the residual difference current, which is now the quantity to be determined, will converge more rapidly. Use of this method as applied... View full abstract»

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  • Boundedness of a class of second-order time-delay systems with large retardations

    Publication Year: 1972, Page(s):1437 - 1438
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB)

    The boundedness of the solutions of some second-order systems with large retardation is investigated on the basis of a comparison of solutions of nonlinear time-delay systems with a time-delay system whose solutions ca be obtained. View full abstract»

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North Carolina State University