The TCP Control Block Interdependence in Fixed Networks - Some Performance Results

摘要

For every TCP connection a TCP sender has a control block in which the current values of the variables and parameters of the connection are stored, e.g., the congestion window size, the slow start threshold, or the (smoothed) round trip time. The information stored in the control blocks of some TCP connections might be useful for other TCP connections, e.g., starting a new TCP connection with more adequate initial values of the variables and parameters than it is designated in standard TCP to increase the throughput of the new TCP connection. This is the idea behind the TCP Control Block Interdependence (TCBI) [1]. Which of the information stored in the control blocks of some TCP connections and how these information are used for a new TCP connection is dependent on the TCBI controller in the TCP sender with TCBI capabilities. In this paper the performance of two different TCBI controllers compared to the standard TCP are investigated by simulations in a fixed network scenario. Since more and more end systems are connected to the internet via wireless LANs, also the influence of packet losses in the last hop of a TCP connection is regarded.