On the dynamic bandwidth allocation algorithm in ethernet passive optical networks

The Ethernet passive optical network is focused on.To take advantage of its uplink bandwidths,and make full use of its functions,three algorithms are introduced.They are the algorithm about interleaved polling with adaptive cycle time,the algorithm based on the service quality of the dynamic bandwidth allocation and the algorithm based on service quality and prediction.In term of the business service quality,these algorithms are compared with each others.With the help of OPNET,their performances are simulated.The experimental results show that,the algorithm based on service quality and prediction is superior to the others,it can improve uplink bandwidths utilization ratio of the system.