Multiple leaky buckets with buffer sharing for MPEG video in ATM networks

This paper presents a new flow control scheme based on multiple leaky buckets (MLB) for MPEG video in ATM networks. A basic assumption was made that not all MPEG traffic sources simultaneously generate data at their maximum rate. Unlike the conventional leaky bucket (LB), the leaky rate and buffer capacity of all LBs are shared in the same virtual path. In our mechanism, the leaky rate and buffer capacity of each LB is dynamically adjusted based on the buffer occupancy. To validate the performance of our mechanisms, sixteen real world MPEG-I traffic traces were used in our experiment. The simulation results show that the cell loss rate tended to decrease while the number of traffic sources increased. Moreover, the cell loss rate had three to more than one thousand times improvement compared to the conventional leaky bucket method.