針對目前用戶的多業務情況，提出了一種支持QoS的EPON上行動態帶寬分配算法。給出了兩種控制幀結構，設計了兩種新型的支持多業務QoS的EPON上行信道動態帶寬分配算法：基于光網絡單元ONU端的單級授權混合發送算法和基于光線路終端OLT的多級授權分離發送算法。通過仿真測試，發現兩種算法均有良好的時延特性和較穩定的隊列尺度，能較好地支持多業務優先級的EPON系統。
關 鍵 詞 多業務優先級; 動態帶寬分配; 以太幀; 時延特性

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