Optimal data rate control for video stream transmission over wireless network

Wireless networks make us expect the realization of new applications using distributed multimedia like the advanced traffic system, the disaster prevention system, and the adhoc network system. However, since the network bandwidth over wireless network is not stable and limited because of higher packet loss rate inherently compared with wired networks, more careful QOS guaranteed function have to be introduced when video streaming service is provided. In this paper, we introduce the optimal control method to determine how to transmit the compressed video packets from server to client so that the required network bandwidth is minimized and network input/out buffers are optimized. Client server model for video streaming is proposed and numerical equations are formulated. The optimal sending data rate from server is derived and the temporal buffer occupancy is calculated. Computational result using the actual video data indicates the effectiveness of the suggested video data transmission.