Xerox Essay

7437 Words Mar 11th, 2016 30 Pages
On the Use of Quality of Service in IP over ATM
Bruce A. Mah1 bmah@CS.Berkeley.EDU The Tenet Group
Computer Science Division
University of California at Berkeley
Berkeley, CA 94720-1776
(510) 642-8905 (voice)
(510) 642-5775 (fax)

The future Internet will very likely include some components based on Asynchronous Transfer
Mode (ATM), as well as existing network technologies. This environment produces the possibility of using one of the strengths of ATM (namely, quality-of-service guarantees) to improve the performance of Internet traffic. In this report, we document some of our work in progress on the use of performance-guaranteed ATM virtual circuits to carry IP datagrams. We are currently addressing the implications
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Section 2 provides some background and motivation for this work. In Section 3, we discuss some related work. We present the issues of our research in Section 4. Finally, we describe our completed and current work in Section 5 and
Section 6, respectively.

2 Background and Motivation
Asynchronous Transfer Mode (ATM) is a new network technology designed for “integrated services” networks capable of carrying multimedia data as well as conventional computer data traffic [Alles93]. ATM is a connection-oriented service that transfers small, fixed-sized packets called cells through a switched-based network. Network protocols called ATM Adaptation Layers (AALs) fragment larger, variable-sized packets into cells for transmission and reassemble them upon arrival at their destinations. With the appropriate scheduling disciplines in the network
1. Support for this research was provided by (NSF/DARPA) NCR-8919038, the Corporation for National Research
Initiatives, (DOE) DE-FG03-92ER-25135, AT&T Bell Laboratories, Digital Equipment Corporation, Hitachi, Ltd.,
International Computer Science Institute, Mitsubishi Electric Research Laboratories, and Pacific Bell.
On the Use of Quality of Service in IP over ATM


switches and support in the signalling software, ATM networks have the potential to provide real-time2 performance guarantees, such as bounds on bandwidth and packet loss [ATM93]. These performance

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