A Correlation-aware Negotiation Approach for Service Composition

Composing existing services to create new services has been considered as an important activity of developing service-oriented architecture systems. The increment of services that provide the same functionality but different qualities leads to the complexity in finding the best solution for a composite service. In a heterogeneous and dynamic environment, QoS negotiation provides a flexible means for choosing suitable atomic services for service compositions. However, most proposed negotiation approaches assume that services are independent of others in terms of quality. Consequently, these negotiation approaches are not able to handle the correlation factors among services. This paper presents a flexible correlation-aware negotiation approach for service compositions. In our approach, the service correlations are considered as factors affecting the choice of concrete services. The effectiveness of the approach is demonstrated via experiments.