Research Of The TCP Queue Management For Network Protocol Stack

The low speed of transmission in Wide Area Network (WAN) is a problem that every internet company wants to solve currently. According to the situation, the paper study on reducing the amount of data transmission by eliminating duplicated data to improve the network transmission speed.It is in the network node which implements elimination duplicate data. The paper discuss the basic concepts and research status of queue management, data redundancy elimination, queuing theory and other related technology, propose the queue management model based on the TCP transparent proxy. It establish two queue models for queue A and B, one of the models is a single server queue model that queue A and B share the given memory space and another is a two stages tandem queue model that queue A and B bisect the given memory space, we name them model 1 and model 2.It derive the size of memory space needed that zero packet loss rate in theory. The establishment and the implementation of the dynamic queue management model is according to the proportional relationship of the number of user connections and memory requirements. Its core is dynamic adjust queue management mode according to the number of user connections size, so that the packet loss rate, queue length, queue delay keep balance. In the process of practical project development, construct the WAN TCP transparent proxy platform, verify the two models by adjusting the given space. The experimental results show that in the case of large memory space, model 2 is better than the model 1, but model 1 is superior to model 2 in the case of the memory space is not enough.Apply queuing theory to queue management in the network node can make the packet loss rate, queue length ,queue delay achieve a balance by dynamic adjust queue management models when the memory is limited and the actual number of user connections is constantly changing.