A Survey on TCP Protocol and RTT Estimation

There are several versions of TCP protocol: TCP Tahoe, TCP Reno, NewReno, SACK and Vegas. Reno algorithm which bases on loss detection is widely used in Internet, while TCP Vegas adjusts transmission rate basing on RTT of packets. Although Vegas is improved in every aspect, when it coexists with Reno, it can not share bandwidth fairly. Precise estimation of RTT is important for improving the performance of TCP Vegas. Exiting estimation methods have advantages and disadvantages. Systemic overview of development of TCP protocol and RTT estimation are basis to farther research on TCP protocol and RTT estimation