Analysis and performance evaluation of the EFCM common congestion controller for TCP connections

In this paper, we present a new common congestion-control approach called “ensemble flow congestion management” (EFCM). First, we describe the design constraints of EFCM. Then, we explain and analyze the EFCM control algorithms. After that, we investigate the performance improvement of EFCM compared to standard TCP congestion control under different network conditions. Simulations with EFCM show a considerable increase in throughput and (short-term) fairness without increasing the aggressiveness of a set of TCP connections-we also show this analytically using a fairness argument. The proposed EFCM controller algorithms are easy to implement and have a low additional complexity.