The present invention is a global convergence network (Heterogeneous Network) subscribers in environmental communication, depending on the propagation environment and service characteristics quality, and selectively connecting the advantageous access network (Access Network) and the charging, the method of wireless subscriber capacity increase over the effective use and traffic distribution of a heterogeneous access network resources that can provide the fuzzy decision criteria (Multi- criteria decision making) access network using the selected method to a system and method. How to select the best access network selection method in the heterogeneous network of the present invention purge from the access network using a standard decision method is used to access the network selection parameters for a standard decision using the membership function and decision function There is a technical feature constituted by. ; Therefore, a method for selecting an access network in a heterogeneous network of the present invention is purged using a reference for decision-making method in a heterogeneous network environment consisting of a subscriber heterogeneous access networks free mobility, as well as provide access to a network option, and shall have the effect of enabling operators to effectively manage the wireless infrastructure resources.
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