⊕ Congestion Signal - Packet Loss
+ + - - ^ ^
take packet loss as a signal of network congestion  

⊕ AIMD Windows Size Adjustment (Flow Control)
+ + - - ^ ^

slower in increasing phases, faster in decreasing phases
trial-and-error based flow control
acknowledge packets may be lost or delayed due to some causes other than network congestion
Web Page Copyright: 國立政治大學資訊科學系 連耀南 lien@cherry.cs.nccu.edu.tw  congestion.htm,  Thu Mar 15 12:54:43 CST 2007