Date Added: Dec 2011
In this paper, the authors analyze the importance of a centralized controller based system with congestion over the network. Some previous researches show validity of the centralized controller by experiments. However, the effectiveness has not proved analytically. Therefore, this paper provides an idea for the congestion control over the path instead of overcoming it from the congested node. When delays in the packet arrival over the network takes place that information instead of slowly flowing to all the nodes can be transferred to the centralized node at once when autonomous system is established and this can be then further transferred to the nodes without delay that need to send their packets using that path.