Thomas Kunz
Systems and Computer Engineering
357
Additive
Increase/Multiplicative Decrease
nIdea:
–increase
CongestionWindow when congestion goes down
–decrease
CongestionWindow when congestion goes up
nQuestion: how does the source determine whether or not the network
is congested?
nAnswer: implicitly through packet loss
–timeout
signals that a packet was lost
–packets
are seldom lost due to transmission error
–lost
packet implies congestion