A Resilient Transport Control Scheme for Metro Ethernet Services Based on Hypothesis Test

This paper aims to enhance the transport services of Ethernet MANs by detecting congestion more accurately and responding to packet losses more adaptively. Traditional TCP was designed for best-effort networks, and cannot utilize available bandwidth efficiently in a broadband link. Most of the previous research addressed this problem by modifying the additive increase multiplicative decrease (AIMD) algorithm of TCP. In this paper, a novel resilient transport control scheme is proposed for Ethernet services that utilize a less aggressive congestion window reduction algorithm when a non-congested environment is detected. A stochastic model for packet loss is proposed, in which packet losses are expressed as a random function of congestion and random loss present in the network Transport layer congestion control is stated as a hypothesis test process; making decisions based on multiple ACK feedbacks. The new method can keep false-alarm probability under control and therefore it increases throughput significantly.