Trust-oriented QoS-aware composite service selection based on genetic algorithms

摘要

Service selection in service-oriented computing has emerged to be an increasingly important research area.rnFrom the client’s point of view, in addition to the QoS of a service or a service composition, the trustrnlevel becomes an important part. As the complexity of invocation in service composition has been greatlyrnincreased, a comprehensive mechanism, which could evaluate both the subjective aspect as trust expressionrnand the objective aspect as QoS, is needed. In this paper, we provide a formal service composition architecturernfor service selection. In addition, we propose a trust evaluation method for the service composition planrnbased on the subjective probability theory, based on them, our trust-oriented genetic algorithm (TOGA) isrnproposed to find a near-optimal service composition plan with QoS constraints. Experimental results havernillustrated that our proposed approach can discover the near-optimal solution efficiently.