| A large number of software services continue to emerge and play an increasingly important role in people 's work and life.These services have formed a service ecosystem.In order to provide users with a good experience,the service and service ecosystem will change constantly in a dynamic environment such as new demand or performance improvement.Changes in services can affect each other and may result in insufficient competition.Therefore,it is of great significance to study the evolutionary mechanism in order to improve and regulate the ecosystem.In this paper,a model of service ecosystem evolution based on value analysis is proposed.Firstly,according to the characteristics of software service ecosystem,a hierarchical model including user layer,service layer,invocation network layer and infrastructure layer is presented.Secondly,from the point of view of value exchange in the ecosystem,the service value model is constructed based on service quality,service cost and user quantity,and the unified measurement index of service value is given.On this basis,the value-added-oriented service evolution mechanism is proposed from the perspective of competition and cooperation.The global regulation mechanism of ecosystem is put forward and the dynamic system model of service ecosystem is formed.Through the simulation experiment on Repast platform,the results show that:(1)Cooperative events between services can significantly enhance the value of services;(2)Help mechanism has significant influence on promoting ecosystem diversity.Simulation experiments can simulate the important mechanism of service ecosystem.To sum up,the value-driven service ecosystem evolution model proposed in this paper can reflect the main characteristics of the service ecosystem,simulate the important mechanism of the service ecosystem,and give the main strategies to improve the ecosystem,which is conducive to promoting the healthy development of the service ecosystem. |
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