A Highway Routing Algorithm Based on SDVN

In the expressway scenario, the vehicle nodes move fast, which leads to the instability of the traditional network topology of the Internet of vehicles, which is easy to cause the interruption or retransmission of data transmission. This paper intends to use SDVN (software defined vehicular networks) technology, introduce hidden Markov model into the system to predict the location information of the destination vehicle node at the next time, and introduce the truck driving slowly on the highway as a mobile RSU to increase the whole signal coverage. A unified routing management algorithm (URMA) is proposed to collect the status of all vehicle nodes within the coverage of each device participating in Expressway Communication and transmit it to the controller. The controller calculates the whole network topology, calculates an optimal route and sends it to the vehicle node. Ns-3 simulation experiments show that even in the scene where the RSU signal is not fully covered, this algorithm still has good end-to-end transmission delay and lower packet loss rate compared with the classical algorithm and its improved algorithm.