A new multivalue feedback closed-loop control algorithm for handling and preventing congestion in highspeed networks is proposed and analyzed. The asymptotical stability （oscillation-free） of this algorithm is proved. The issue of optimal parameter design which gives the optimal transient behavior （in the sense that the asymptotic approach to steady state is fastest）

and the optimal steady-state behavior （non-oscillation

maximum of throughput and minimum of delay） is presented. Extensive simulation results show the robustness of the algorithm and the better performance than other multivalue feedback closed-loop control algorithms.