APON接入系统分布式分层调度算法  

Distributed Hierarchical Scheduling Algorithm for APON Access System

作　　者：胡刚[1] 何骏[1] 范戈[1] 

机构地区：[1]上海交通大学区域光纤通信网国家重点实验室,上海200030

出　　处：《高技术通讯》2002年第9期16-20,共5页Chinese High Technology Letters

摘　　要：分析了APON中MAC子层的算法特点 ,按照不同的QoS需求把ATM的各类业务重新作了划分 ,提出了适合于APON系统的分布式分层调度方式。分布式分层调度方式对需调度的信息进行了聚合 ,并能十分容易地嵌入各种公平调度算法。通过仿真 ,证明了该调度方式能有效地保证服务质量。同时由于采用了分层调度 ,减少了各ONU与OLT之间的信息交互开销。The character of MAC algorithms in APON is analyzed, ATM traffic classes based on their QoS requirements is redefined and a distributed hierarchical scheduling scheme that suits the APON system is proposed. This scheme aggregates the scheduling information, and can easily integrate various fair queuing algorithms. Through simulation, it is proved that this scheduling scheme could effectively guarantee QoS. It also reduces information exchange cost between ONU and OLT due to the hierarchical scheduling structure.

关 键 词：APON接入系统 ATM 无源光网络 分布式分层调度 服务质量 

分 类 号：TN915.2[电子电信—通信与信息系统] TN929.1[电子电信—信息与通信工程]