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An adaptive Genetic Algorithm is presented to select optimal web service composite plan from a lot of composite plans on the basis of global Quality-of-Service (QoS) constraints. In this Genetic Algorithm, a population diversity measurement and an adaptive crossover strategy are proposed to further improve the efficiency and convergence of Genetic Algorithm. The probability value of the crossover operation can be set according to the combination of population diversity and individual fitness. The algorithm can get more excellent composite service plan because it accords with the characteristic of web service selection very well. Some simulation results on web service selection with global QoS constraints have shown that the adaptive Genetic Algorithm can gain quickly better composition service plan that satisfies the global QoS requirements.
Date of Conference: 22-25 March 2011