Abstract: Tim}sensitive data transmission in vehicular Ad hoc networks (VANE7)is particularly challenging due to the high mobility and the rapidly changing topology. To address this problem, we proposed a scheme that uses network coding with dynamic sliding window in opportunistic routing. 13y adjusting the window size according to the network status,it encodes different number of native packets into a coded packet such that it can tolerate the acknowledgement delay and improve the throughput in different cases. I}he scheme uses a lower triangular matrix coding method to smooth the decoding interval in the receiver. Simulations show that the scheme is able to increase the throughput and decrease the delay fitter efficiently. It is especially appropriate for time sensitive multimedia applications in VANET.

Key words: Slidc window, Nctwork coding, Opportunistic routing, VANET