Efficient new delayed ACK for TCP
Ming Li, Andrey Lukyanenko, Sasu Tarkoma, Antti Ylä-Jääski · 2013
When a TCP connection experiences a timeout, the sender must wait at least RTOmin (Minimum Retransmission Timeout) before doing the retransmission, during which the channel may be completely idle, undermining the throughput and channel efficiency. In this paper, we investigate the origin of RTOmin and find that it is needed to mitigate against spurious timeouts when the Delayed ACK (DA) scheme for TCP is implemented.