网络流量系统的有限拍控制

应用控制理论方法讨论了ATM网络的ABR通信中基于速率反馈的流量控制问题.针对网络的传播时延提出了有限拍控制策略,使系统的响应在有限拍的时间内严格地到达稳态,从而使信源发送速率快速响应网络状态的变化,较好地克服了时延对流量控制快速性和稳定性的影响.该方法能有效地避免拥塞发生,同时降低信元丢失率,且结构简单.仿真结果验证了此算法的有效性.

Deadbeat Control of Traffic Systems in Networks

Rate-based traffic control problem for ABR communication in ATM network is discussed by means of control theory. The deadbeat control is provided aiming at the propagation delay in the network, which makes system response reach stabilization in the limited beat strictly. Therefore, it can be achieved that the sent rate of sources responses to the changes of network status rapidly, and the adverse effect in rapidity and stability caused by the delay is overcome. The proposed method with a simple structure can avoid the congestion effectively, and reduce cell loss rate. The simulation result shows the efficiency of the scheme.