【摘要】 为了实现吉比特无源光网络(GPON)带宽分配的公平性,降低网络的传输延时,提高带宽利用率,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———面向多等级服务的动态带宽分配算法.基本原理是根据业务的优先级以及各种业务对带宽的需求,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,这种算法可以提高网络的吞吐量,满足各种业务的时延要求,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 achieve the fairness of bandwidth allocation in gigabit-capable passive optical networks(GPON),reduce the network transmission delay and improve the bandwidth utilization,a new dynamic bandwidth allocation(DBA) scheme-multiservice-aware DBA scheme,was proposed based on researching of TC frame structure and the method of dynamic bandwidth allocation in GPON system.The main idea of the scheme is to allocate the bandwidth among all ONUs and then allocate the bandwidth in one ONU according to the bandwidth requirement based on different class services.Analysis and simulation results show that it can improve the throughput and meet the delay requirement of all kinds of services through the new algorithm and can realize the fairness for both different ONUs and services.更多还原