Handover self-optimization mechanism based on velocity for cellular networks

Quality of Handover (QoH) is a crucially important performance indicator for cellular networks. With the increasing requirement of users, the velocity of users should be highly valued, because it has great effect on handover process and user experience. In this paper, we propose Handover Self-optimization Mechanism based on Velocity (HSMV), a novel handover mechanism which can improve the performance: firstly, some original data should be extracted from the mobile devices and a mathematic model will be proposed to estimate the velocity of users using Received Signal Strength (RSS); secondly, the relation between handover margin (HM) and the estimated velocity is concluded based on the model, then the value of HM will be adjusted accordingly; finally, the assessment method to estimate velocity as well as tackle with some handover problems will be validated. Simulation results show that it can not only gain relatively accurate velocity but also decrease the call drop rate significantly.