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PCN Based Admission Control for Autonomic Video Quality Differentiation: Design and Evaluation

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Abstract

The popularity of multimedia services has introduced important new challenges for broadband access network management. As these services are very prone to network anomalies such as packet loss and jitter, accurate admission control mechanisms are needed to avoid congestion. Traditionally, centralized admission control mechanisms often underperform in combination with multimedia services, as they fail to effectively characterize the amount of needed resources. Recently, measurement based admission control mechanisms have been proposed such as the IETF Pre-Congestion Notification (PCN) mechanism, where the network load is measured at each intermediate node and signaled to the edge, where the admittance decision takes place. In this article, we design a PCN based admission control mechanism, optimized for protecting bursty traffic such as video services, which is currently not studied in the PCN working group. We evaluated and identified the effect of PCN’s configuration in protecting bursty traffic. The proposed admission control mechanism features three main improvements to the original PCN mechanism: first, it uses a new measurement algorithm, which is easier to configure for bursty traffic. Second, it allows to automatically adapt PCN’s configuration based on the traffic characteristics of the current sessions. Third, it introduces the differentiation between video quality levels to achieve an admission decision per video quality level of each request. The mechanism has been extensively evaluated in a packet switched simulation environment, which shows that the novel admission control mechanism is able to protect video traffic while maximizing the link utilization and avoiding packet loss.

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Acknowledgments

The research was performed partially within the framework of the EUREKA CELTIC RUBENS project. Steven Latré is funded by Ph.D grant of the Fund for Scientific Research, Flanders (FWO-V).

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Correspondence to Steven Latré.

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Latré, S., De Vleeschauwer, B., Van de Meerssche, W. et al. PCN Based Admission Control for Autonomic Video Quality Differentiation: Design and Evaluation. J Netw Syst Manage 19, 32–57 (2011). https://doi.org/10.1007/s10922-010-9183-8

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  • DOI: https://doi.org/10.1007/s10922-010-9183-8

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