Dynamic adaptation of video for transmission under resource constraints

A distributed system that supports applications with varying quality of service (QoS) requirements must use many adaptive mechanisms to guarantee performance to the applications. This paper presents the use of the mechanism of graceful adaptation for applications with multiple levels of performance. The different levels of performance use different amounts of resources. Our ERDoS architecture supports such mechanisms in order to provide end-to-end service guarantees to applications. The mechanism we present is based on market protocols in which trade-offs are made between the different QoS dimensions of an application so as to satisfy the application´s QoS needs under resource constraints