A Route Handoff Method Based on Virtual Private Network in Vehicle Information Network

Abstract

Vehicle information system is the data center of vehicle communication networks, and the vehicle gateway is the core of the vehicle information system, in order to support the vehicle information system both WLAN and CDMA interfaces, a virtual network device (VND) in Linux embedded System is designed and implemented as a mid-layer module between the real device driver and internet protocol stack called driver middleware. The VND can establish a virtual private network between the vehicle information device and agent server. The virtual network interface is designed to catch the packets both input and output processing for the sake of checking the route before the packets transmission. Both the terminal and the agent have the driver middleware to ensure smooth flow routing.