支持QoS的EPON上行动态带宽分配算法设计  

Design of DBA Algorithm in EPON Upstream Channel in Support of QoS

作　　者：王东[1] 邱昆[1] 王利村[1] 

机构地区：[1]电子科技大学宽带光纤传输与通信网技术教育部重点实验室,成都610054

出　　处：《电子科技大学学报》2004年第6期714-717,共4页Journal of University of Electronic Science and Technology of China

基　　金：教育部优秀青年教师教学科研奖励计划基金资助项目

摘　　要：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。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.

关 键 词：多业务优先级 动态带宽分配 以太帧 时延特性 

分 类 号：TN915.6[电子电信—通信与信息系统]