Stability of FAST TCP in Single-link Multi-source Network
FAST TCP is a recently proposed transfer control protocol for future networks with high bandwidth delay product.At present,analyzing the stability of FAST TCP in different networks is an active research area.The nonlinear delay differential equations are established to describe the closed loop system made up of FAST TCP and the routers in single-link multi-source networks.Based on this model,the equilibrium point of the system is deduced.Then the nonlinear model of the system is linearized around the equilibrium point.Moreover,the sufficient condition for local stability of the system is achieved using modern control theory.The stability condition is decoupled from network parameters.The conclusion presented here is strongly verified by extensive simulations.