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Proceedings of the IEEE

Issue 11 • Nov. 1978

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Displaying Results 1 - 25 of 29
  • [Front cover and table of contents]

    Publication Year: 1978, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1978, Page(s):1303 - 1306
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • The evolution of packet switching

    Publication Year: 1978, Page(s):1307 - 1313
    Cited by:  Papers (49)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (839 KB)

    Over the past decade data communications has been revolutionized by a radically new technology called packet switching. In 1968 virtually all interactive data communication networks were circuit switched, the same as the telephone network. Circuit switching networks preallocate transmission bandwidth for an entire call or session. However, since interactive data traffic occurs in short bursts 90 p... View full abstract»

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  • Digital communications and the conduct of science: The new literacy

    Publication Year: 1978, Page(s):1314 - 1319
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (777 KB)

    This essay is a personal perspective on the emergence of a new form of communication, optimistically called the 'EUGRAM'. This form is based on the convergence of economical digital communications with computer-aided facilities for file management, and protocols to facilitate the interconnection of users separated both in time and space. The EUGRAM is contrasted with the telephone, with the latter... View full abstract»

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  • Principles and lessons in packet communications

    Publication Year: 1978, Page(s):1320 - 1329
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1331 KB)

    After nearly a decade of experience, we reflect on the principles and lessons which have emerged in the field of packet communications. We begin by identifying the need for efficient resource sharing and review the original and recurring difficulties we had in achieving this goal in packet networks. We then discuss various lessons learned in the areas of: deadlocks; degradations; distributed contr... View full abstract»

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  • Applications of information networks

    Publication Year: 1978, Page(s):1330 - 1346
    Cited by:  Papers (23)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2326 KB)

    The present and projected applications of computer-communication networks or information networks include electronic mail, teleconferencing "the office of the future," management information systems, modeling, "computerized commerce," monitoring of patients, military command and control, home security, education, and news. This paper briefly examines 30 such applications and the network capabiliti... View full abstract»

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  • A tutorial on protocols

    Publication Year: 1978, Page(s):1346 - 1370
    Cited by:  Papers (18)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2776 KB)

    Protocols are common tools for controlling information transfer between computer systems. The concept of a protocol, which grew out of experimental computer networking, is now fundamental to syatem design. In this paper, basic protocol functions are explained and discussed. Then, the concept of a distributed system architecture is presented. It provides the framework for layers and protocols to op... View full abstract»

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  • High-level protocols

    Publication Year: 1978, Page(s):1371 - 1386
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1911 KB)

    High-level protocols (HLP's) are the high-level languages of distributed systems. In a resource-sharing network, HLP's link processes working on a conmmn application. The design of an HLP is decomposed into three components: language, coding, and transport. The language expresses the commands and data passed between processes. It is designed to provide standardization and device independence, in o... View full abstract»

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  • Issues in packet-network interconnection

    Publication Year: 1978, Page(s):1386 - 1408
    Cited by:  Papers (35)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2615 KB)

    This paper introduces the wide range of technical, legal, and political issues associated with interconnection of packet-switched data communication networks. Motivations for interconnection are given, desired user services are described, and a range of technical choices for achieving interconnection are compared. Issues such as the level of interconnection, the role of gateways, naming and addres... View full abstract»

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  • Theoretical aspects in the analysis and synthesis of packet communication networks

    Publication Year: 1978, Page(s):1409 - 1422
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1402 KB)

    With the intention of outlining some of the theoretical studies on the design of packet communication networks the present paper introduces the models and the basic relations underlying the analysis as well as the method for evaluating packet delay. Then the multicommodity flow problem as applied to the route assignment is described with particular reference to static and quasi-static routing sche... View full abstract»

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  • Modeling and measurement techniques in packet communication networks

    Publication Year: 1978, Page(s):1423 - 1447
    Cited by:  Papers (33)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2962 KB)

    Considerable advances in the modeling and measurements of packet-switched networks have been made since this concept emerged in the late sixties. In this paper, we first review the modeling techniques that are most frequently used to study these packet transport networks; for each technique we provide a brief introduction, a discussion of its capabilities and limitations, and one or more represent... View full abstract»

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  • General purpose packet satellite networks

    Publication Year: 1978, Page(s):1448 - 1467
    Cited by:  Papers (63)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2857 KB)

    The use of satellite communication techniques to provide integrated data network and point-to-point and conference speech services is discussed. The concept of a General Purpose Packet Satellite Network (GPSN) is introduced in terms of its requirements, and consideration is given to techniques that satisfy these requirements. The class of Priority Oriented Demand Assignment (PODA) algorithms is de... View full abstract»

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  • Advances in packet radio technology

    Publication Year: 1978, Page(s):1468 - 1496
    Cited by:  Papers (233)  |  Patents (158)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4425 KB)

    Packet radio (PR) is a technology that extends the application of packet switching which evolved for networks of point-to-point communication lines to the domain of broadcast radio. It offers a highly efficient way of using a multiple access radio channel with a potentially large number of mobile subscribers to support computer communication and to provide local distribution of information over a ... View full abstract»

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  • An introduction to local area networks

    Publication Year: 1978, Page(s):1497 - 1517
    Cited by:  Papers (63)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2599 KB)

    Within a restricted area such as a single building, or a small cluster of buildings, high-speed (greater than 1 Mbit/s) data transmission is available at a small fraction of the cost of obtaining comparable longhaul service from a tariffed common carrier. Local area networks use this low-east, high-speed transmission capabality as the basis for a general-purpose data transfer network. There are tw... View full abstract»

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  • Enhanced message addressing capabilities for computer networks

    Publication Year: 1978, Page(s):1517 - 1527
    Cited by:  Papers (15)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1137 KB)

    Three message addressing modes are described: 1) Logical adderssing, in which a permanantly,assigned address denotes one or more physical addresses. This permits multiple connections from the subscriber to the network, as well as other functions. 2) Broadcast adderssing, in which a messase is addressed to all subscribers. 3) Group addressing and multidestination addressing, in which a message carr... View full abstract»

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  • Commercial, legal, and international aspects of packet communications

    Publication Year: 1978, Page(s):1527 - 1539
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1645 KB)

    Packet switching technology emerged rapidly in the 1970's as another viable mode of communications switching, along with circuit and message switching. Since packet switching offers economical and versatile data communication capabilities in a multiuser environment, it is particularly well suited for furnishing public data communication network services. Public packet networks are now established ... View full abstract»

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  • Public packet switched data networks, international plans and standards

    Publication Year: 1978, Page(s):1539 - 1549
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1245 KB)

    The key to the interconnection of any telecommunication service on an international basis is the establishment at an early stage of internationally agreed Recommendations relating not only to the services and facilities to be provided but also to the methods to be adopted to set-up and clear-down calls, the routing of traffic, the setting of acceptable charges and the numbering plan to be adopted.... View full abstract»

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  • Economic analysis of integrated voice and data networks: A case study

    Publication Year: 1978, Page(s):1549 - 1570
    Cited by:  Papers (33)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2328 KB)

    This paper describes the results of a study to evaluate alternative switching strategies for future integrated voice and data networks. Three fundamental problems are addressed: 1) the economics of integrating voice and data applicatiom in a common communications system; 2) the comparison of alternative switching technologies for integrated voice and data networks; 3) the cost-effectiveness of alt... View full abstract»

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  • Numerical analysis of MSSW delay line using layered magnetic thin slabs

    Publication Year: 1978, Page(s):1577 - 1578
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The time delay characteristics of magnetostatic surface waves propagating in a layered system consisting of thin YIG films, dielectric slabs, and a metal plate are theoretically investigated by a numerical analysis of the dispersion relation. Numerical results for the ferrite-air (FA) and ferrite-air-metal (FAM) modes are compared with the previously reported results. View full abstract»

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  • A low-cost pulse frequency multiplier

    Publication Year: 1978, Page(s):1578 - 1580
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (465 KB)

    A simple circuit for symmetrical pulse frequency multiplication is described. The circuit uses an integrator, adaptive threshold comparators, a summer, and an inverter. Excellent symmetry of the output waveform over a wide frequency range with multiplication factors up to 5 has been observed. View full abstract»

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  • New active-gyrator circuit using a single current conveyer

    Publication Year: 1978, Page(s):1580 - 1581
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    A new canonic active RC circuit for realizing an ideal grounded inductor using a single second generation current conveyor as the active building block is described. The circuit may be considered as a novel active-gyrator circuit realized using only a single current conveyor. View full abstract»

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  • Comments on the performance of maximum entropy algorithms

    Publication Year: 1978, Page(s):1581 - 1582
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (206 KB)

    Two points recently brought up in this journal concerning the performance of maximum entropy spectral analysis are discussed. First, an additional recursive formula is presented which simplifies and reduces the computational load of the Burg algorithm. Second, attention is drawn to some recent results in the geophysics literature related to the proper selection of prediction filter length. View full abstract»

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  • Noninvasive measurement of biological information by nuclear magnetic resonance: Measurement of relaxation time of a particular target by magnetic focusing method

    Publication Year: 1978, Page(s):1582 - 1583
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (239 KB)

    In order to clarify the possibility of detecting cancer noninvasively by the measurement of the relaxation time, model experiments were performed by applying our proposed magnetic focusing method to conventional nuclear magnetic resonance (NMR) techniques. It was made clear that the relaxation time of a particular target was selectively estimated from the proximity of the target by this method. View full abstract»

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  • Reconstruction of 3-D objects from cone beam projections

    Publication Year: 1978, Page(s):1584 - 1585
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (203 KB)

    A true three-dimensional reconstruction (TTR) algorithm which is applicable to a cone beam with 4π detection geometry is introduced. The TTR differs from conventional slice by slice 3-D reconstruction methods. Promising areas of application for the TTR algorithm are position and X-ray computerized tomographic image reconstruction. View full abstract»

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  • Correction to "Tutorial review of synthetic-aperature radar (SAR) with applications to imaging of the ocean surface"

    Publication Year: 1978, Page(s): 1585
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North Carolina State University