Title

Using adaptive routing to achieve Quality of Service

Authors

Authors

P. Su;M. Gellman

Comments

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Abbreviated Journal Title

Perform. Eval.

Keywords

Quality of Service; routing; self-monitoring; loss; delay; cognitive; packet networks; RANDOM NEURAL-NETWORK; PERFORMANCE; ATM; Computer Science, Hardware & Architecture; Computer Science, Theory &; Methods

Abstract

Self-monitoring allows a network to observe its own behavior via probing and measurement mechanisms. This can then be exploited by the system to take autonomous decisions for the purpose of system management, performance management and user Quality of Service (QoS). In this paper, we experimentally explore how QoS goals that are externally set by network users, can then be explicitly exploited by a self-aware network to control its own behavior to attain these goals. The experiments we report are conducted in two distinct Cognitive Packet Network (CPN) test-beds which use probing to select the routes which best satisfy the QoS goal. Our experiments validate this concept with QoS goals which include end-to-end delay, packet loss, and a mixture of these two metrics. We observe that using only delay in the QoS goal is a good way to reduce delay and loss if losses result only from congestion. However, using loss in the QoS goal is seen to be useful if the paths that are adaptively selected avoid nodes where packet losses occur for reasons other than congestion. In general we observe that CPN networks effectively adapt routing behavior to the QoS goal that is specified. (C) 2003 Published by Elsevier B.V.

Journal Title

Performance Evaluation

Volume

57

Issue/Number

2

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

105

Last Page

119

WOS Identifier

WOS:000221484900001

ISSN

0166-5316

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