The Influence of Different Weighting Methods on MADM Ranking Techniques and Its Impact on Network Selection for Handover in HetNet

Optimal radio access network selection for fast and efficient vertical handover decisions in a wireless heterogeneous network to provide seamless connectivity to ensure a wide range of services to multimode mobile terminals is one of the most challenging fields of research in mobility management in mobile communication. Various multiattribute decision-making-based network selection techniques have been proposed that use subjective, objective, and integrated weight computation methods. In this paper, we investigate the impact of various weighting methods on TOPSIS, VIKOR, and GRA ranking methods to determine how and what effects they have on the ping-pong handover of mobile nodes during roaming in heterogeneous wireless communication. The simulation results have shown that TOPSIS methods provide better ranking in association of entropy objective weighting method while VIKOR and GRA perform better in association with improved CRITIC. The TOPSIS + Entropy, VIKOR + Improved CRITIC, and GRA + Improved CRITIC methods provide enough difference between the currently servicing RAN and the selected RAN performance score to ensure the best network selection technique and reduce ping-pong handover.