A Framework for QoS Based Dynamic Web Services Composition

Web services composition based on quality of services have been recently studied by several researchers. Service composition with minimum communication cost has been well studied for service overlay networks. However there are very few optimization algorithms available which considers more than one objective. Finding a solution that optimizes all the objectives is nontrivial. In multi-objective optimization problem, the solution can be given in such a way that it fulfills the requirements of the user without making much sacrifice from the optimal solution. In this paper we would like to address the problem of dynamic services composition in an existing framework by considering two QoS parameters that are communication cost and service cost. For this we suggest an algorithm. Some experimental results are also reported that validate the algorithm.