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中文摘要：
文章提出一种保证以太无源光网络（EPON）系统服务质量（QoS）的预估动态带宽分配（DBA）算法，该算法把多个子周期组合为一个超周期，在超周期中预估各级业务带宽，然后在子周期内参考预估值进行带宽分配；并对用户上行数据进行接入管理，维持QoS的稳定。实验结果表明，该算法既能保证各级业务的带宽利用率和时延要求，又能提供更加稳定的QoS。
英文摘要：
In this paper, a novel predicted Dynamic Bandwidth Allocation （DBA） algorithm for QoS guarantee in EPON systems is proposed, which combines multiple subcycles into one supercycle. In the supercycle, the bandwidths for different levels of services are predicted and allocated in the subcycles with reference to the predicted values. Access Management （AM） modules are added to maintain stable QoS. Experimental results show that by using this algorithm, the bandwidth availability and delay can be ensured for different levels of services and still more stable QoS provided.
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