Web Service Combination Algorithm by Using QoS Constraint

With the development of web service technology, it is necessary to combine the existing web service to complete the complex functions. With the increasing of web service´s quantity, users are not only satisfied to get web service combination, but also have certain requirements of the service quality, and want to get better quality or the best service combination. This paper uses genetic algorithm to solve the service combination with QoS. We verify the feasibility of algorithm by the simulation experiment. Compared with the enumeration algorithm, the result of service combination by our algorithm is very close. to the optimal solution, and the efficiency of time is better.