【摘要】 为了实现吉比特无源光网络(GPON)带宽分配的公平性,降低网络的丢包率及传输延时,文章研究了GPON系统传输汇聚层的帧结构及动态带宽分配的实现方法,提出了一种新的动态带宽分配(DBA)算法——基于QoS的二层动态带宽分配算法。基本思路是根据不同等级业务的带宽需求,在PON层和ONU层分别进行带宽的合理分配。理论分析和仿真试验证明,这种算法可以提高带宽的利用率,保证不同业务的不同时延要求,并且对不同用户和不同等级的业务都具有很好的公平性。更多还原

【Abstract】 In order to realize the fairness and reduce the transmission delay in GPON, a new dynamic bandwidth allocation(DBA) scheme-two level DBA scheme based on QoS was proposed based on the researching of TC frame and the method of dynamic bandwidth allocation in ITU-T G.984.3.The essential idea is to allocate the bandwidth among all ONUs and allocate the bandwidth in one ONU according to the bandwidth requirement based on different class services. Analysis and simulation results show that the new algorithm can improve the bandwidth utilization and meet delay request of different services and realize the fairness for both different ONUs and services.更多还原