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The next generation of wireless networks also known as beyond 3G (B3G) networks is a mixture of heterogeneous wireless access technologies. One of the most important technical challenges in B3G wireless networks is the support of vertical handoff. In this paper, we propose the use of multiple attribute decision making (MADM) method: VIKOR for vertical handoff decision. The idea of VIKOR for decision making is based on an aggregating function representing closeness to the ideal solution. We execute simulation experiments to compare the performance of VIKOR for vertical handoff decision in B3G networks with other MADM schemes such as SAW and TOPSIS.