Modeling and performance analysis of network-aware and service-oriented systems

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In the Internet, a wide variety of traffic streams requiring application-specific QoE are transmitted over heterogeneous networks having diverse QoS. These traffic streams range from delay-tolerant content delivery to delay-sensitive applications such as video-conferences and streaming. Network infrastructure is, however, still unstable and cannot provide very reliable service. In order to keep these QoEs above satisfactory levels when designing and operating networks, it is crucial to develop a unified methodology for the performance relationship of QoS of networks and QoE of applications. From this point of view, we have obtained basic analytical results.