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PERFORMABILITY EVALUATION OF TELECOMMUNICATION NETWORKS

IP.com Disclosure Number: IPCOM000128495D
Original Publication Date: 1988-May-01
Included in the Prior Art Database: 2005-Sep-16
Document File: 14 page(s) / 62K

Publishing Venue

Software Patent Institute

Related People

Meyer, John F.: AUTHOR [+3]

Abstract

Digital telecommunication networks represent a fusion of concepts, techniques, and technologies from the fields of both communication and computing. The evaluation of such systems can likewise draw on methodologies which have evolved in both disciplines, bringing them together in a fashion that is suited to the needs of integrated services digital networks. With this aim, we discuss how quality of service (QOS) and its associated service performances are viewed by the telecommunications industry (per recent CCITT recommendations), and compare them with concepts of performance, dependability, and performability that have emerged within the computing community. We find that QOS and performability are compatible notions, where each reflects the combined influence of factors associated with both performance (in the strict sense) and dependability. Unlike the CCITT view of QOS, however, performability is conceptually a measure, thus providing an effective means of defining actual QOS measures. Model-based performability evaluation is then reviewed, with an emphasis on techniques which appear most applicable to complex telecommunication networks.

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THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.

PERFORMABILITY EVALUATION OF TELECOMMUNICATION NETWORKS [ title ]

1 John F. Meyer

THE UNIVERSITY OF MICHIGAN COMPUTING RESEARCH LABORATORY CRL-TR-06-88

May 1988

Room 2222, EECS Building
Ann Arbor, Michigan 48109-2122
USA
Telephone: (313)763-8000

Performability Evaluation of Telecommunication Networks2 John F. Meyer

Computing Research Laboratory

Dept. of Electrical Engineering and Computer Science The University of Michigan
Ann Arbor, Michigan, USA 48109

Abstract

Digital telecommunication networks represent a fusion of concepts, techniques, and technologies from the fields of both communication and computing. The evaluation of such systems can likewise draw on methodologies which have evolved in both disciplines, bringing them together in a fashion that is suited to the needs of integrated services digital networks. With this aim, we discuss how quality of service (QOS) and its associated service performances are viewed by the telecommunications industry (per recent CCITT recommendations), and compare them with concepts of performance, dependability, and performability that have emerged within the computing community. We find that QOS and performability are compatible notions, where each reflects the combined influence of factors associated with both performance (in the strict sense) and dependability. Unlike the CCITT view of QOS, however, performability is conceptually a measure, thus providing an effective means of defining actual QOS measures. Model-based performability evaluation is then reviewed, with an emphasis on techniques which appear most applicable to complex telecommunication networks.

[ Chapter ] 1 INTRODUCTION

As a computer scientist, my familiarity with telecommunications and, more specifically, teletraffic science/engineering is recently acquired and shallow. What little I know has been obtained from selected readings and some stimulating discussions with experts in the teletraffic field. On the other hand, as telecommunications and computing become more closely entwined, particularly with the advent of ISDNs, past achievements in each discipline are becoming increasingly relevant to one another. Moreover, many of the problems we currently face are of common

1 This work is to appear in the Proceedings of the 12th International Teletraffic Congress, Torino, Italy, May 1988.

2 This work is to appear in the Proceedings of the 12th International Teletraffic Congress, Torino, Italy, May 1988.

University of Michigan Computing Research Laboratory Page 1 May 01, 1988

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PERFORMABILITY EVALUATION OF TELECOMMUNICATION NETWORKS

interest to both disciplines. It is in this spirit that we consider the basic problem of evaluating digital telecommunication networks and, more specifically, ISDNs. In terms of the OSI reference model, the integrated nature of ISDNs is perhaps most evident at the layers which support bearer services (layers 1-3), e.g., the int...