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Proceedings Paper

Broadening the ATM offer with a full set of service categories
Author(s): Livio Lambarelli; Matteo D'Ambrosio; Paolo Castelli
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Paper Abstract

The paper aims at providing a comprehensive picture of the new set of ATM-layer services defined in parallel by the ITU-T and The ATM Forum, outlining the potential benefits that can derive, both to users and network service providers, from the availability of these new functionalities in an ATM-based network. Terminological differences between the ITU-T and ATM Forum documents are compared and clarified and the approaches to the use of quality of service parameters and classes are discussed. The so-called Service Categories (using the ATM Forum nomenclature) are Constant Bit Rate, Variable Bit Rate (VBR), Available Bit Rate (ABR) and Unspecified Bit Rate. The ABR is the newest and the one raising major discussions, as specific congestion control mechanisms, which do represent a real innovation in the ATM framework, have been defined for its support. The paper therefore introduces the ABR service in some details and discusses some still open issues and utilization perspective.

Paper Details

Date Published: 13 December 1996
PDF: 12 pages
Proc. SPIE 2953, Broadband Strategies and Technologies for Wide Area and Local Access Networks, (13 December 1996); doi: 10.1117/12.261237
Show Author Affiliations
Livio Lambarelli, CSELT SpA (Italy)
Matteo D'Ambrosio, CSELT SpA (Italy)
Paolo Castelli, CSELT SpA (Italy)


Published in SPIE Proceedings Vol. 2953:
Broadband Strategies and Technologies for Wide Area and Local Access Networks
Roberto Vercelli, Editor(s)

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