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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/3402
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- Quantitative assessment of IP service quality in 802.11b and DOCSIS networks
- Armitage, Grenville J.; Nguyen, Thuy T. T.
- This paper experimentally identifies usage scenarios that trigger IP performance limitations in two common Internet access technologies: DOCSIS cable networks and 802.11b wireless local area networks. We use commercial, standards-compliant implementations of each link technology and demonstrate that data transfers from a remote server to a wireless- or cable-attached client can create substantial latency spikes (upwards of 100ms) on the shared wireless or cable link segment, despite each technology’s generous downstream link bandwidth. These spikes have a significant impact on delay-sensitive applications (such as voice over IP, online games or interactive streaming video) sharing the link. We also observe the negative impact of 802.11bs CSMA/CA on end-to-end TCP performance in the presence of low bandwidth, non-reactive traffic, and DOCSIS request/grant cycle on maximum DOCSIS upstream and downstream bandwidths. We illustrate the former point by calculating the performance degradation of an 802.11b link shared by online game players. Our results should motivate future work on optimized media access algorithms for 802.11b and DOCSIS.
- Publication type
- Conference paper
- Research centre
- Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Advanced Internet Architectures
- Paper presented to the Australian Telecommunication Networks and Applications Conference (ATNAC) 2004, Sydney, Australia, December 2004.
- Publication year
- Australian Telecommunications Networks and Applications Conference
- Copyright © 2004 the authors and ATNAC Australia. Published version of this paper reproduced with the kind permission of the publisher.
- Full text
- Peer reviewed