支持QoS的EPON上行动态带宽分配算法设计

针对目前用户的多业务情况，提出了一种支持QoS的EPON上行动态带宽分配算法。给出了两种控制帧结构，设计了两种新型的支持多业务QoS的EPON上行信道动态带宽分配算法：基于光网络单元ONU端的单级授权混合发送算法和基于光线路终端OLT的多级授权分离发送算法。通过仿真测试，发现两种算法均有良好的时延特性和较稳定的队列尺度，能较好地支持多业务优先级的EPON系统。
关 键 词 多业务优先级; 动态带宽分配; 以太帧; 时延特性

Abstract For the situation of many services in the users’ request,the paper introduces DBA algorithm in EPON upstream channel in support of QoS. We propose two control frames and two novel DBA algorithms supporting multi-priority services with differentiated QoS: SGMTA algorithm based on ONU and MGSTA algorithm based on OLT. In our conducted simulation experiments, both algorithm show satisfied delay performance and stable buffer size as the network load increases. Thus, we conclude that these two novel DBA algorithms are reasonable and practical in support of multi-priority EPON system.
Key words multi-priority services; dynamic bandwidth allocation; ethernet frame; delay