QoS-Assured Service Composition in Managed Service Overlay Networks
Many value-added and content delivery services are being offered via Service Level Agreements (SLAs). These services can be interconnected to form a Service Overlay Network (SON) over the Internet. Service composition in SON has emerged as a cost-effective approach to quickly creating new services. Previous research has addressed the reliability, adaptability, and compatibility issues for composed services. However, little has been done to manage generic Quality-of-Service (QoS) provisioning for composed services, based on the SLA contracts of individual services. This paper presents QUEST, a QoS assUred composEable Service infrasTructure, to address the problem.