To alleviate the congestion of current Internet, an effective congestion avoid/control strategy must be adopted in backbone routes, to keep the stability of the whole network.

• 为了减轻当前IP网的阻塞现象 ；主干网路由器必须采取有效地策略来避免和控制网络拥塞 ；从而保证整个网络的稳定性 .