**4. Hybrid AHP and TOPSIS based cell selection**

The conventional cell selection scheme in Mobile WiMAX is only based on the received signal strength. However, it is not sufficient to meet the different user application requirements that WiMAX promises to meet. The proposed scheme considers multiple criteria; CINR, BW and congestion delay for cell selection using some MCDM methods, AHP and TOPSIS. As shown in Figure 3, the proposed cell selection scheme can be divided into three main functions: "collecting info" which collects the decision criteria and network conditions, "criteria weight‐ ing" which processes criteria weighting using AHP methods based on application QoS requirements, and "alternatives ranking" which finalizes the process of cell selection using TOPSIS method.
