Abstract
This paper mainly discusses a vertical handoff algorithm based on differential pre-decision and DFT (Discrete Fourier Transform)-based trend detection method in heterogeneous power networks. We have employed Fourier Transform based signal trend detection to detect the unavailability and the decay of the WLAN signal. Then, we propose the differential prediction algorithm that has sufficiently accurate of the further RSS prediction to determine whether to switch to the new WLAN. Finally, we apply the MATLAB software to gain the simulated analysis based on this algorithm. Simulation results demonstrate the proposed algorithm can significantly reduce the impact of the ping-pong effect.