Deadline guaranteed media stream transmission based on backpressure in mobile environment

It is likely to lead to the following questions due to the user´s move in the streaming media transmission process in the mobile environment: the established connection is interrupted; the effect about data transmission structure becomes poor or invalid; wireless connection changes more frequently. All these problems will directly lead to the QoS of streaming media transmission. Back pressure algorithm is a control method which is proposed by Tassinlas and Ephremides in the control theory. It mainly manifest in routing scheduling scheme based on the back pressure numerical in network transmission system. Due to the conclusion which back pressure algorithm can make the network load balancing and maximize network utilization, we choose back pressure algorithm as the basic research methods of mobile streaming media transmission. According to the above problem, the paper proposes the back pressure algorithm guaranteeing deadline, and the proposed algorithm can well guarantee deadline for packet transmission. It not only can remove the packets which are redundant or staying too long time in the network, but also can make network throughput optimal.