Impact of transient CSMA/CA access delays on active bandwidth measurements

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Show simple item record Portoles-Comeras, Marc Cabellos-Aparicio, Albert Mangues-Bafalluy, Josep Banchs Roca, Albert Domingo- Pascual, Jordi 2012-03-14T11:25:43Z 2012-03-14T11:25:43Z 2009
dc.identifier.bibliographicCitation IMC'09, Proceedings of the 9th ACM SIGCOMM conference on Interent Measurements Conference, (2009), 397-409
dc.identifier.isbn 978-1-60558-771-4
dc.description Proceedings of: 9th ACM SIGCOMM Conference on Internet Measurement Conference (IMC'09), November 4–6, 2009, Chicago, Illinois
dc.description.abstract WLAN devices based on CSMA/CA access schemes have become a fundamental component of network deployments. In such wireless scenarios, traditional networking applications, tools, and protocols, with their built-in measurement techniques, are usually run unchanged. However, their actual interaction with the dynamics of underlying wireless systems is not yet fully understood. A relevant example of such built-in techniques is bandwidth measurement. When considering WLAN environments, various preliminary studies have shown that the application of results obtained in wired setups is not straightforward. Indeed, the contention for medium sharing among multiple users inherent to CSMA/CA access schemes has remarkable consequences on the behavior of and results obtained by bandwidth measurement techniques. In this paper, we focus on evaluating the effect of CSMA/CA-based contention on active bandwidth measurement techniques. As a result, it presents the rate response curve in steady state of a system with both FIFO and CSMA/CA-based contending cross-traffic. We also find out that the distribution of access delay shows a transient regime before reaching a stationary state. The duration of such transient regime is characterized and bounded. We also show how dispersion-based measurements that use a short number of probing packets are biased measurements of the achievable throughput, the origin of this bias lying on the transient detected in the access delay of probing packets. Overall, the results presented in this paper have several consequences that are expected to influence the design of bandwidth measurement tools as well as to better understand the results obtained with them in CSMA/CA links.
dc.description.sponsorship European Community's Seventh Framework Program
dc.description.sponsorship This work has been partially funded by the COST Action IC0703 "Data Traffic Monitoring and Analysis", by the Spanish Ministry of Science and Innovation under grant number TEC2008-06826/TEC (project ARTICO), and by the Catalan Regional Government under grants 2009SGR-1140 and 2009SGR-940
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher ACM
dc.rights © ACM
dc.subject.other Bandwidth measurements
dc.subject.other Wireless
dc.subject.other CSMA/CA
dc.subject.other Achievable throughput
dc.title Impact of transient CSMA/CA access delays on active bandwidth measurements
dc.type conferenceObject
dc.description.status Publicado
dc.subject.eciencia Telecomunicaciones
dc.identifier.doi 10.1145/1644893.1644941
dc.rights.accessRights openAccess
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/214994
dc.type.version acceptedVersion
dc.relation.eventdate November 4–6, 2009
dc.relation.eventnumber 9
dc.relation.eventplace Chicago, Illinois
dc.relation.eventtitle ACM SIGCOMM Conference on Internet Measurement Conference (IMC'09)
dc.relation.eventtype proceeding
dc.identifier.publicationfirstpage 397
dc.identifier.publicationlastpage 409
dc.identifier.publicationtitle IMC'09, Proceedings of the 9th ACM SIGCOMM conference on Interent Measurements Conference
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