Application of an Improved SACK TCP in Bandwidth Asymmetric Network
Yu Liu · Beijing Youdian Xueyuan xuebao · 2004
The basic principle of TCP and SACK TCP are introduced. In the bandwidth asymmetric network, the deficiency of the bandwidth on backward path will limit the return of the feedback information, resulting in the degradation of the TCP performance. On the basis of the related works, SACK filtering is proposed to improve TCP performance. Furthermore, an advanced SACK option is proposed to gain performance enhancement. It utilizes the redundant information in the SACK TCP header and decreases the byte number from 8 to 4 to denote a segment block. Computer simulations show that the new proposals have better performance.