Differential Data Transmission Based On Maximum Transmission Probability And Stratified Expansion

In recent years,with the rapid development of intelligent terminals and mobile communication technology,the ratio of intelligent terminals and the differences between terminals have gradually increased.With the increasing of terminal processing capability,the transmission rate of the system is increasing,on the other hand,the gap between terminal processing capacity increases gradually.Therefore,under the precondition of guaranteeing the transmission rate and transmission efficiency,the wireless access points should also realize the differential transmission of the data to adapt to the terminals with different processing ability.The network coding has been proved to improve the throughput,robustness and reliability of the network by processing the data in the middle node,which is more and more applied in the wireless network.How to combine network coding with wireless network to improve the performance of wireless network throughput and reliability has become an important topic in the field of wireless communication nowadays.By analyzing the combination of network coding and differential data transmission,this paper presents a differential transmission scheme based on the difference of link quality and terminal processing capability under wireless network.The main content and main innovation of the thesis are as follows:Firstly,as the core algorithm in the real-time decoding network coding,the maximum queue algorithm is improved based on the difference of wireless link quality,which makes it transmit successfully with greater probability under the condition of different link quality,and puts forward the Maximum Transmission Probability Clique algorithm(MTPC).By selecting the maximum queue every time,maximizing the maximum queue length and sending the receiving end to the packet successfully,thus increasing the probability of the success of each transmission,reducing the retransmission count from the whole and ensuring that more terminals are covered each time as far as possible,thus improving retransmission efficiency.Secondly,in view of the differences in terminal processing capability,after considering the difference of link quality,a differential data retransmission scheme based on layered expansion and MTPC algorithm is proposed,which guarantees the low time delay of the low processing capability terminal while simultaneously considering the data quality and delay of the high processing capability terminal.At the same time to ensure the high and low processing capacity of the terminal quality of service and improve the efficiency of retransmission.