TCP Relentless Congestion Control Model

We introduce a simple model of the Relentless Congestion Control proposed by Matt Mathis. Relentless Congestion Control (RCC) is a modification of the AIMD congestion control which consists in decreasing the TCP congestion window by the number of lost segments instead of halving it. Despite some ongoing discussions at the ICCRG IETF-group, this congestion control has, to the best of our knowledge, never been modelled nor evaluated. In this letter, we provide an analytical model of this novel congestion control and compare its accuracy with simulations over ns-2. We also propose an improvement of this congestion control with the addition of a lost retransmission detection scheme.