Optimal network selection using MADM algorithms

In the presence of heterogeneous wireless network the selection of optimal network for transferring data and telephony is an important task. The selection of optimal network is done either at user terminal or at service provider terminal or at both terminals. This selection is done by some advancement in the mobile terminal. Therefore, the main challenge in a heterogeneous wireless environment is the selection of best network. This can be taken as a multidimensional decision making problem. In this work, selection of network is done on the basis of user`s preference using various MADM algorithms like Simple Additive Weighting(SAW), Multiplicative Exponential Weighting (MEW), Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS) and VIKOR. For selection of network, score of each network in case of conversational, streaming and background traffic class is calculated. Simulation results are presented for score calculation and on the basis of score optimal network is selected. The analysis using SAW and MEW is quite simple while using TOPSIS and VIKOR, it is little bit complex.