Research And Performance Analysis Of Congestion Control Algorithm Based On Multi-path Transmission Mobile Terminal

With the continuous development of various network technologies,mobile Internet applications cover all parts of the country,but now people's demand for high-bandwidth mobile Internet is increasing day by day.Although mobile devices have multiple network interfaces,the traditional Transmission Control Protocol allows only mobile terminals to connect at one time,using only one network card at a time.However,MPTCP protocol can enable mobile terminals to realize concurrent communication through several network interfaces at the same time,so as to improve network throughput and enable users to enjoy high-quality bandwidth services.Compared with wired network,the wireless heterogeneous network in which the mobile terminal is located has the phenomena of random packet loss and congestion packet loss.And the current strategy of congestion control algorithm,it is unified as a packet loss,which is a symbol of the collided,to express,such as random packet loss may be mistaken for congestion packet loss,at the same time,to distinguish the packet loss way are one-sided,the effect is quite general,didn't also the way for lost package type,for stable region points accurately,at the same time also does not have the corresponding congestion window adjustment method.Blindly reducing the congestion window for traffic control will only lead to the deterioration of MPTCP performance.In view of the above problems,this project has successfully implemented the installation and construction of ns-3-dce simulation tool on the Linux platform,and it does not need to change its kernel source code to execute the user-space and kernel-space network protocol and related applications,simplifying the complex operation.At the same time,problems existing in congestion control of mobile communication can be easily and accurately found through simulation experiments.On this basis,an improved algorithm d-packet loss-olia is proposed for OLIA congestion control algorithm.The algorithm can judge the type of packet loss according to the time delay jitter eigenvalue and the congestion window jitter eigenvalue,so as to make up for the shortage of judging by the delay or congestion window alone.At the same time,on the basis of fairness and balanced congestion,different window reduction methods can be adopted for packet loss reasons,and packet loss types can be identified stably and accurately,so as to effectively improve the effective throughput of mobile communication based on MPTCP protocol and provide users with high-quality services.