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For traditional internet applications, the quality of network delivery is not critical since applications like web browsing and email are elastic and can tolerate certain network impairments. However, with increasing bandwidth more high-throughput, always-on, inelastic multimedia applications are introduced to the IP infrastructure. Guaranteed quality of end user's experience in multimedia services is a challenge to traditional network QoS measurement and management models. This paper proposes a utility-based QoS model as an extension of existing network QoS mechanisms. This QoS model is driven by utility functions.
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