Although TCP is now a mature transport protocol, its original design limits its effectiveness at alleviating network congestion. This seminar looks at the congestion control and bandwidth detection techniques of both TCP and TCP Vegas, and shows where they are deficient. To overcome such network problems, a radical new congestion control framework for the Internet will be introduced and examined in detail. Simulation results which compare TCP, TCP Vegas and the new congestion control framework will be reviewed. Introduction Network congestion is a large problem in the Internet.
Characteristics are packet loss and large packet delays.
Congestion stems from the offered load on the Internet, plus its inherent design. Because design is now difficult to modify, main solutions focus on limiting offered transmission load to that which can be delivered. Design of the Internet 1. No transmission guarantee. Routers determine how to route incoming packets, buffer them before transmission, and finally retransmit them.