Reduction of UHP in heterogeneous wireless networks

Abstract

Mobility management enables the Mobile Terminal to switch between networks for better resource management and is still a hot research topic. Handoff management is one such challenge for maintaining active connections for roaming mobile terminals, as they change their network point of attachment. In heterogeneous networks, it is critical to evaluate and select the best algorithm out of the different algorithms, available for vertical handoff. Wrong decision probability (WDP) is one of the performances metric which is used to measure the efficiency of handover algorithms in providing such seamless service. In this work, probability equations are derived for five network models and probabilities are computed for unnecessary handover, missing handover and wrong decisions. The handoff algorithm for the five network model is designed to evaluate the performance of algorithms designed based on combination of received signal strength and bandwidth using Wrong Decision Probability model. Presentation of analytical and simulation results is made to validate the vertical handover and is compared with the results of handoff algorithm for the five network model designed considering bandwidth alone.