Introduce the Delay-based Congestion Algorithm into SCTP

Narrate SCTP congestion control mechanism, and introduce FAST, a delay-based Congestion Algorithm, in the SCTP association. Analyzing the difference between delay-based Algorithm and loss-based Algorithm, we argue that the delay-based Algorithm is more available than the current algorithm in the high-speed network, and propose a simple framework of FAST congestion control mechanism in SCTP.