Distributed Sampling for On-line SLA Assessment
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Tipus de documentText en actes de congrés
Data publicació2008-09-30
EditorIEEE Communications Society
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
New business infrastructures over the Internet pose
a new set of traffic constraints. In particular, multimedia and
interactive contents require guarantees of bandwidth and delivery
time. The broad deployment and real-time nature of this class
of applications require the provisioning of specific resources in
the network to guarantee a certain level of Quality of Service
(QoS). QoS techniques need ways of obtaining feedback about
the status of the QoS enabled paths, for example, for checking
the fulfilment of Service Level Agreements (SLA). A possible
technique for obtaining such feedback is by passively monitoring
the network traffic.
The issue with traffic monitoring is the additional bandwidth
needed by the control traffic generated by the different collection
points in order to synchronise its acquired QoS metrics. Moreover,
passive monitoring at line speed is an expensive process both
in terms of resource consumption and price. However, some of
these requirements can be significantly reduced by using traffic
sampling.
This paper presents a novel methodology for intra-domain
on-line distributed QoS monitoring, which makes an efficient
use of the network resources by employing distributed sampling
mechanisms.
The proposal is validated by performing real tests on an
European-wide testbed. Our results show that the sampling
technique can significantly reduce the traffic overhead, while
obtaining very accurate estimations of the One Way Delay
performance metric
CitacióSerral, R.; Barlet, P.; Domingo, J. Distributed Sampling for On-line SLA Assessment. A: LANMAN 2008 16th IEEE Workshop on Local and Metropolitan Area Networks. "LANMAN 2008 16th IEEE Workshop on Local and Metropolitan Area Networks". Cluj Napoca: IEEE Communications Society, 2008.
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