Network Selection Algorithm Based on Diff-AHP and TOPSIS in Heterogeneous Wireless Networks

The most important issue in the fourth generation (4G) of wireless communications is how to select the most suitable access network to be used for communication when several access networks are available. To achieve this issue, network selection is intended to choose the most suitable network in terms of quality of service (QoS) for mobile users. This paper proposes a new technique for network selection decision. This technique combines two multi attribute decision making (MADM) methods such as diff-analytic hierarchy process (Diff-AHP) and the technique for order preference by similarity to an ideal solution (TOPSIS). The Diff-AHP method is extension of AHP method which be used to find the differentiate weights of available networks by considering each criterion and TOPSIS method is used to rank the alternatives.