Research Onthe Network Selection Algorithm In Heterogeneous Wireless Networks

With the development of mobile communication technology,the number of internet users is growing.At the meantime,the network business requirements have also increased.The mobile communication network of the future is not a single network,while it should be Heterogeneous Wireless Network with a variety of wireless access technology convergence and overlapping.Therefore,how to select the optimal network in all kinds of network for seamless access become a research hotspot.In heterogeneous wireless networks,an important task of the mobile terminal is to choose the best network for seamless handover at anytime anywhere,which was called the network selection.In recent years,numerous extensive research on this subject has be enconducted,using various kinds of mathematical theory.The theory which was chosen to conduct the research determines the optimization objectives,complexity and the performance the optimal network.In order to choose the appropriate theory and to obtain the best results,it is crucial to understand the potential basic mathematical theory.Therefore,this paper systematically studies the contents relating to the most significant mathematical theory of network selection in literature.Through an elaborate scheme,this paper will compare several mathematical theories and discuss how to combine them together to obtain a theory which works more effectively.So as to get Seamless integration of network in heterogeneous wireless network environment,it is not only via the utilization of a variety of wireless access technology,but to create high quality network selection mechanism.For multiple network coverage,the users choose the optimal network terminal according to the performance,price,demand which is in the comprehensive consideration.In order to maximize the interests,the network will launch the selection of the users.The process of two way choice of the user and the network is called the game.In the traditional game theory network selection,the result of the game attracted more attention,and the user’s dynamic selection behavior has not been fully reflected.This paper proposes an evolutionary game algorithm,which is the evolutionary game based on limited rationality with the dynamic replication.The participants can observe,study and balance the process in the whole process of the game.