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Service Level Agreements (SLAs) are a mean to guarantee quality of service terms between providers and consumers. Obviously, it is very important to ensure a clear and fair establishment of these SLAs. This issue has not been well addressed, especially when providers and clients do not share the same knowledge degree. In many cases, clients have to select a subset of predefined technical choices by...
Ideally, during network service negotiation, the QoS specification should be done using user-perceived, application or network parameters. However, this flexibility requires efficient QoS mapping mechanisms. Moreover, the service negotiation using service and application dependent parameters is complex because it applies to a range of services to be negotiated and each service can use different QoS...
Ubiquitous computing environments provide a wide range of new challenges and possibilities in Distributed Systems. Among these, collaborative activities involving several users present some complex issues. These activities are very dynamic and imply heterogeneous communications and devices, and therefore adaptive solutions are required. Moreover, context has to be taken into account in order to provide...
How can proper services be delivered and composed to satisfy the user's intention turns out to be a major research issue in service oriented systems. This paper proposes a solution enhancing service composition based on a model of the user's intention and a set of service patterns. The core hypothesis of this research is that the composition mechanism may be guided by a model of user's intentions...
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