Abstract:

Network selection problem in wireless local area network(WLAN) and universal mobile telecommunications system(UMTS) integrated network was studied using fuzzy analytic hierarchy process. A novel network selection algorithm that combines analytic hierarchy process and fuzzy comprehensive evaluation was proposed. By analyzing the factors that influence network selection in integrated systems, a network selection decision-making model was founded and the weights of these factors were calculated. A method for calculating relative-membership grade was proposed by analysis of fuzzy comprehensive evaluation model. Total membership grade was calculated through relative-membership grade and the weights of these factors. The optimum network was selected according to total membership grade. The validity and accuracy of the algorithm was confirmed by the simulation.

Key words: network selection, fuzzy analytic hierarchy process, heterogeneous networks