A DSR routing technology based on multiple description code and communication distance of nodes for Vehicular Ad Hoc Networks is researched.The group for on-board the dynamic change of Ad Hoc network topology

vehicle high-speed motion

vehicles running direction and speed unpredictability

based on the Ad Hoc characteristics such as network on-demand routing protocols

a kind of DSR can be well applied in vehicle routing technology since networking.This technology

using multiple description coding technology and on-board node improved the process of finding and recovery in DSR routing technology.On-board node according to signal attenuation degree judge between a jump communication vehicle-mounted node distance

according to the RREP news source node

the main route information choose multiple description coding technology send and receive routing messages reduced route requests overhead.Simulation experiment analysis indicates that the improved DSR routing technology has better performance in average end-to-end delay

packet delivery ratio and route request overhead.