一种新的EPON上行动态带宽分配算法与仿真

A new EPON up-stream dynamic bandwidth allocation algorithm and simulation

为了合理分配EPON上行信道带宽,提出一种能够区分服务等级的固定周期轮询动态带宽分配算法。该算法将光网络单元(ONU)的业务分为三个等级,根据不同的业务等级动态分配上行带宽,有效保证整个EPON网络的QoS以及带宽分配的公平性。同时,为了进一步提高EPON系统上行链路的带宽利用率,克服算法产生的idle time问题,对算法进行了改进。最后,对该算法进行仿真实验。

In order to rationally allocate EPON up-stream access bandwidth, a fixed period alternation enquiry dynamic bandwidth allocation algorithm is put forward, which can differentiate service grade. The algorithm divides ONU operation into 3 grades, and according to different operation grade, the algorithm dynamically allocate up-stream access bandwidth, which can effectively ensure the QoS of the whole EPON network and the equitableness of bandwidth allocation. At the same time, in order to improve the bandwidth utilization ra- tio, conquer the idle time problem, and the algorithm is ameliorated. Finally, the algorithm is simulated.