Supporting Real-Time Applications in an Integrated Services Packet Network: Architecture and Mechanism
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csz.pdf-3.pdf
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227.31 KB
Format
Adobe PDF
Checksum (MD5)
548a9c5456fdcafe6fa172bb40a88043
Author(s)
Clark, David D
Shenker, Scott
Zhang, Lixia
Date Issued
August 1992
Abstract
This paper considers the support of real-time applications in an Integrated Services Packet Network (ISPN). We first review the characteristics of real-time applications. We observe that, contrary to the popular view that real-time applications necessarily require a fixed delay bound, some real-time applications are more
flexible and can adapt to current network conditions. We then propose an ISPN architecture that supports two distinct kinds of real-time service: guaranteed service, which is the traditional form of real-time service discussed in most of the literature and involves pre-computed worst-case delay bounds, and predicted service,
which uses the measured performance of the network in computing delay bounds. We then propose a packet scheduling mechanism that can support both of these real-time services as well as accommodate datagram traffic. We also discuss two other aspects of an overall ISPN architecture: the service interface and the admission control criteria.
Subjects
fixed delay bound
Integrated Services Packet Network
ISPN
real-time applications
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