ＴＣＰ是利用接收端返回的确认信息调整发送端数据发送的传输层协议．在非对称信道存在的网络中， 当传输确认信息的信道带宽远小于传输数据的信道带宽， 确认信息的传输速率小于数据包的传输速率时， ＴＣＰ数据传输的吞吐量受到确认信息返回速率的限制．经过分析发现， 非对称信道上产生的问题主要是由于信道对确认包的“瓶颈”而引起的．本文以此为出发点， 从减少确认信息返回的数量和频率方面， 对ＴＣＰ的接收端和发送端算法进行改进， 并对改进算法做了进一步的仿真 TCP is to use the confirmation information returned by the receiver to adjust the transport layer protocol for sending data. In a network where asymmetric channels exist, when the channel bandwidth for transmitting acknowledgment information is much smaller than the channel bandwidth for transmitting data and the transmission rate of the acknowledgment information is less than the data packet transmission rate, the throughput of the TCP data transmission is limited by the acknowledgment rate of the acknowledgment information . After analysis, we found that the problems caused by the asymmetric channel are mainly caused by the “bottleneck” of the channel to the acknowledgment packet. Based on this, this paper improves the receiver and sender algorithms of TCP from the aspects of reducing the number and frequency of confirmation information return, and further simulates the improved algorithm