介紹了無(wú)線鏈路上的TCP性能問(wèn)題和相關(guān)的工作。提出了一種改進(jìn)從移動(dòng)主機(jī)到固定網(wǎng)絡(luò)方向TCP性能的方案，在基站處設(shè)置TCP代理來(lái)監(jiān)視在無(wú)線鏈路上丟失的TCP報(bào)文段，通過(guò)復(fù)制和發(fā)送重復(fù)的ACK來(lái)觸發(fā)MH端TCP的快速重傳，有效地防止超時(shí)重傳的發(fā)生。計(jì)算機(jī)仿真結(jié)果表明此方案具有良好的性能。
關(guān) 鍵 詞 傳送控制協(xié)議; 應(yīng)答; 傳送控制協(xié)議代理; 報(bào)文段

Abstract The TCP performance on wireless link and the related works are introduced. A new scheme is proposed to improve the TCP performance over the wireless link on the direction from mobile host to fixed network. It installs a TCP agent at the base station to monitor the segments dropped on the wireless link, then triggers TCP fast retransmission on the MH side by replicating and forwarding specific ACKs, which can effectively avoid timeout retransmission. Simulation results show that the new scheme has favorable performance.
Key words transport control protocol; acknowledge; TCP agent; segment