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Communications Magazine, IEEE

Issue 3 • Date March 1988

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Displaying Results 1 - 5 of 5
  • A symptom-driven expert system for isolating and correcting network faults

    Page(s): 6 - 13
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (799 KB)  

    A description is given of Troubleshooter, a system for diagnosing problems in the Datakit Virtual Circuit Switch networking environment. This system is representative of applications using expert systems as diagnostic tools. Troubleshooter uses software tools from the academic laboratories, most notably OP24 from Carnegie-Mellon University and Franz LISP from the University of California at Berkeley. Extensive laboratory tests has confirmed Troubleshooter's ability to detect faults.<> View full abstract»

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  • Applying artificial intelligence techniques to human-computer interfaces

    Page(s): 14 - 20
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (646 KB)  

    A description is given of UIMS (User Interface Management System), a system using a variety of artificial intelligence techniques to build knowledge-based user interfaces combining functionality and information from a variety of computer systems that maintain, test, and configure customer telephone and data networks. Three artificial intelligence (AI) techniques used in UIMS are discussed, namely, frame representation, object-oriented programming languages, and rule-based systems. The UIMS architecture is presented, and the structure of the UIMS is explained in terms of the AI techniques.<> View full abstract»

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  • Interactive repair assistant: A knowledge-based system for providing advice to field technicians

    Page(s): 21 - 24
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (415 KB)  

    The IRA (Intelligent Repair Assistant) expert system is described. This system is used to assist mobile field technicians who are repairing circuits and having noise and transmission problems. It is shown how artificial intelligence techniques can be used by using software tools that are common to the application but not necessarily suited to artificial intelligence. It is stressed that integrating the expert system within the operational environment is a crucial factor in choosing the appropriate software tool.<> View full abstract»

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  • Alternative local area network access protocols

    Page(s): 25 - 45
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2186 KB)  

    The course of recent research is outlined, and state-of-the-art protocols are surveyed. The various classes of access protocols and corresponding performance models are covered. These are fixed assignment access, random-assignment access, demand assignment access, integrated local area networks, and multichannel local area networks.<> View full abstract»

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  • Technical considerations of T-1 carrier transmission via Ku-band domestic satellites

    Page(s): 46 - 55
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (745 KB)  

    Technical constraints and their solutions for a cost-effective point-to-point Ku-band satellite communications service are examined. The topics covered are: optimization of antenna size (hardware cost versus space segment cost); transponder operating point optimization; choice of forward error correction coding; transmission impairment, such as weather-related phenomena, depolarization, and interference; and system margins and transponder capacity.<> View full abstract»

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Aims & Scope

IEEE Communications Magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications systems (PCS), ISDN, and more.

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Editor-in-Chief
Sean Moore
Centripetal Networks