Uma abordagem para análise de desempenho de fluxos VoIP em redes de serviços diferenciados
This work presents a viability analysis of the use of a synthetic VoIP control flow to infer about the performance of individual flows of a flow aggregate belonging to an EF PHB in a DiffServ network. The proposed approach aims to establish a simple performance verification of SLA accomplishment...
| Autor principal: | Zuchowski Filho, Edmundo |
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| Formato: | Dissertação |
| Idioma: | Português |
| Publicado em: |
Centro Federal de Educação Tecnológica do Paraná
2010
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/116 |
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| Resumo: |
This work presents a viability analysis of the use of a synthetic VoIP control flow to
infer about the performance of individual flows of a flow aggregate belonging to an EF PHB
in a DiffServ network. The proposed approach aims to establish a simple performance
verification of SLA accomplishment related to the some of the VoIP flow requirements. The
results should be used to feed requirements specifications for tool design, for example, to
capacity planning activities and management actions. We classify the VoIP traffic as
homogeneous (all flow packets created by a same codec type) and heterogeneous (packets
originated from more than one codec type) to carry out the experiments. The experiments
checked the hypothesis that the control flow performance can be somehow related to the
performance of individual flows of a flow aggregate under the agreed assumptions and
metrics. The metrics one-way delay, jitter and packet loss were evaluated by simulation for
both homogeneous and heterogeneous traffic at several network-controlled load. The results
let us conclude about the viability of the approach to evaluate one-way delay and with
confidence limitations, also the jitter, depending on the traffic type (heterogeneous) and codec type. |
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