A CRI Based Vertical Handoff Algorithm in Heterogeneous Networks

With the movement of mobile devices, in order to keep the best quality of service, mobile devices are required to carry seamlessly handoff. As a result, the vertical handoff in heterogeneous networks is becoming a hot research topic. This paper presents a CRI based vertical handoff algorithm. The algorithm maps parameters to area between 0 and 1 in fuzzy controller, which improves the intelligence of vertical handoff. Our simulation results have proved that the algorithm reduces unnecessary handoff frequencies, and improves the efficiency of vertical handoff.