Vertical handover algorithm for Internet of vehicles based on dynamic scanning period and grey prediction

In order to enable Internet of vehicle users to discover the surrounding available wireless networks in time and reduce the energy consumption caused by network scanning in a heterogeneous network environment, this paper proposes a vertical handover algorithm based on dynamic scanning period and grey prediction method. In the network discovery phase of vertical handover, this method dynamically changes the scanning period according to the speed of the vehicle, so as to achieve a balance between the activate times of the interface and the timely discovery of the network. In the network selection phase, this paper uses the grey prediction algorithm to predict received signal strength of the current access network, so that Internet of vehicles users can make decisions and switch in advance. The simulation results show that compared with existing algorithms, dynamic scanning period method proposed in this paper can discover the network in time and reduce the energy consumption of the terminal. The use of grey prediction algorithm enables Internet of vehicles users to effectively predict the received signal strength and make handover decisions more timely, and the handover call drop rate is improved.