Fast and Strong Control of Congestion-Making Traffic

In case that malicious or selfish user congests network, the traditional congestion control schemes such as ECN (Explicit Congestion Notification) in TCP protocol could not control the pernicious congestion so perfectly as they protect normal traffic. In this paper, we propose a strong congestion-making traffic control scheme, which is capable of preventing malicious or selfish user from congesting networks by dropping only packets corresponding to congestion-making traffic when a network congestion occurs. Our scheme involves two mechanisms: a traffic service decision mechanism that is able to fast and correctly determine whether an incoming packet is normal traffic or congestion-making, and a marking mechanism for identifying congestion-making traffic. In the marking mechanism a router can mark a packet in order to notify downstream routers that the marked packet is congestion-making traffic. To show our scheme's excellence, its performance is measured and compared with that of the existing schemes through simulation.