Satellite ATM(Asychronous transfer mode) is a hot research area of satellite communication in recent years and congestion control is one of the key issues.This paper focuses on the ABR(Available bit rate) congestion control algorithm in the satellite ATM network based on onboard processing

which is implemented by using the traffic prediction.Owing to the long propagation delay of satellite channel

the accuracy of prediction decreases and it degrades the performance of ABR congestion control.In order to overcome the impact of inaccuracy

a new method 'Long-time prediction plus dynamic control bandwidth utilization factor’ is suggested.Simulation results show that this method has advantages on the cell loss probability

link usage

fairness

adaptation to different number of TCP(Transport Control Protocol) sources and transient response.