Forward RTO-Recovery (F-RTO) An Algorithm for Detecting Spurious Timeouts with SCTP in Wireless

SCTP has been found to perform poorly performance in the presence of spurious timeouts (ST) caused by delay spikes which are especially frequent in today's wireless mobile networks. Spurious timeouts cause unnecessary retransmission for several segments and congestion control back-off. There are some proposals for avoiding unnecessary retransmissions after a spurious RTO for require use of SCTP options. We introduce a new SCTP sender algorithm for recovery after a retransmission and show that unnecessary retransmissions can be avoided without SCTP options. The algorithm effectively avoids the unnecessary retransmissions after a spurious RTO, improving the SCTP performance considerably.