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An Analytical Model for Jitter in IP Networks

Hamza Dahmouni, André Girard et Brunilde Sanso

Article de revue (2012)

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Abstract

Traditionally, IP network planning and design is mostly based on the average delay or loss constraints which can often be easily calculated. Jitter, on the other hand, is much more difficult to evaluate, but it is particularly important to manage the QoS of real-time and interactive services such as VoIP and streaming video. In this paper, we present simple formulas for the jitter of Poisson traffic in a single queue that can be quickly calculated . It takes into account the packets delay correlation and also the correlation of tandem queues that have a significant impact on the end-to-end jitter. We then extend them to the end-to-end jitter of a tagged stream based on a tandem queueing network. The results given by the model are then compared with event-driven simulations. We find that they are very accurate for Poisson traffic over a wide range of traffic loads and more importantly that they yield conservative values for the jitter so that they can be used in network design procedures. We also find some very counter-intuitive results. We show that jitter actually decreases with increasing load and the total jitter on a path depends on the position of congested links on that path. We finally point out some consequences of these results for network design procedures.

Sujet(s): 2700 Technologie de l'information > 2700 Technologie de l'information
2700 Technologie de l'information > 2721 Systèmes et réseaux multimédias
Département: Département de génie électrique
Centre de recherche: GERAD - Groupe d'études et de recherche en analyse des décisions
Organismes subventionnaires: CRSNG / NSERC
Numéro de subvention: CRD grant CRDPJ 335934-06
URL de PolyPublie: https://publications.polymtl.ca/15584/
Titre de la revue: Annales des télécommunications (vol. 67, no 1-2)
Maison d'édition: Springer
DOI: 10.1007/s12243-011-0254-y
URL officielle: https://doi.org/10.1007/s12243-011-0254-y
Date du dépôt: 18 avr. 2023 15:10
Dernière modification: 27 sept. 2024 14:47
Citer en APA 7: Dahmouni, H., Girard, A., & Sanso, B. (2012). An Analytical Model for Jitter in IP Networks. Annales des télécommunications, 67(1-2), 81-90. https://doi.org/10.1007/s12243-011-0254-y

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