QoS-assured service composition in managed service overlay networks

Xiaohui Gu, Klara Nahrstedt, Rong N. Chang, Christopher Ward

Research output: Contribution to conferencePaperpeer-review


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. In this paper, we present QUEST, a QoS assUred composEable Service infrasTructure, to address the problem. QUEST framework provides: (1) initial service composition, which can compose a qualified service path under multiple QoS constraints (e.g., response time, availability). If multiple qualified service paths exist, QUEST chooses the best one according' to the load balancing metric; and (2) dynamic service composition, which can dynamically recompose the service path to quickly recover from service outages and QoS violations. Different from the previous work, QUEST can simultaneously achieve QoS assurances and good load balancing in SON.

Original languageEnglish (US)
Number of pages8
StatePublished - 2003
Event23th IEEE International Conference on Distributed Computing Systems - Providence, RI, United States
Duration: May 19 2003May 22 2003


Other23th IEEE International Conference on Distributed Computing Systems
Country/TerritoryUnited States
CityProvidence, RI

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications


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