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Title

Mathematical and experimental analysis of limitations in creating artificial jitter for networked usability trials

Author(s)

Armitage, Grenville;  Branch, Philip A.;  Stewart, Lawrence

Abstract

Controlled usability trials are frequently desirable when assessing the impact of network latency, loss and jitter on highly interactive networked applications such as online games. This leads to a requirement for accurate (or at least predictable) emulation of IP level latency, loss and jitter on a localized network testbed. This paper reflects on the mathematical and experimental insights we gained when developing a controlled jitter network environment. We used FreeBSD’s kernel-resident dummynet module to introduce controlled jitter, but our results generalize to other tools that can introduce dynamically variable delays in an IP packet path. We expect these insights will stimulate further userexperience trials built around low-cost, unix-based networking tools.

Publication type

Conference paper

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies

Source

Paper presented at the 3rd Workshop on Internet, Telecommunications and Signal Processing (WITSP 04), Adelaide, Australia, 20-22 December 2004

Publication year

2004

Keyword(s)

Emulation;  Games;  Internet;  Jitter;  Latency;  Online;  Usability Trials

Publisher

DSP for Communication Systems

Publisher URL

http://www.dspcs-witsp.com/

Copyright

Copyright © 2005 DSP for Communication Systems. Published version of this paper reproduced with the kind permission of the publisher.

Full text

Peer reviewed