STCP: A New Transport Protocol for High-Speed Networks

Transmission Control Protocol (TCP) is the dominant transport protocol today and likely to be adopted in future high‐speed and optical networks. A number of literature works have been done to modify or tune the Additive Increase Multiplicative Decrease (AIMD) principle in TCP to enhance the network performance. In this work, to efficiently take advantage of the available high bandwidth from the high‐speed and optical infrastructures, we propose a Stratified TCP (STCP) employing parallel virtual transmission layers in high‐speed networks. In this technique, the AIMD principle of TCP is modified to make more aggressive and efficient probing of the available link bandwidth, which in turn increases the performance. Simulation results show that STCP offers a considerable improvement in performance when compared with other TCP variants such as the conventional TCP protocol and Layered TCP (LTCP)

Window adaptive TCP for EGPRS networks

TCP congestion control for various networks in wireline or wireless environments has been widely discussed. Many research studies have focused on making TCP more sensitive to network congestion by adding explicit notifications to TCP connections or by letting the intermediate nodes in the network join in TCP congestion control. In GPRS/EGPRS systems and other 3G cellular networks, the radio network controller chooses from, among several channel coders, according to the signal to interference ratio. Hence, the channel data rate that an individual user experiences is time-dependent and variable. In this paper, we propose a TCP window control mechanism that adapts to variable channel data rates. Our simulations show that the window adaptive TCP decreases the buffer occupancy and packet transmission delay, and achieves better throughput utilization when compared with the standard TCP Tahoe version and the Reno version