调谐时间对共享型WDM PON性能的影响和分析  

The Impact and Analysis of Tuning Time in Shared-Based WDM PON

作　　者：李庆华[1] 胡明[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：《信息通信》2010年第3期51-53,41,共4页Information & Communications

摘　　要：在共享型WDMPON中,为了使各ONU共享多个光信道,因此在各ONU处需配置可调谐光发射器,而调谐时间的长短不仅与光发射器的成本密切相关,而且对网络吞吐率、时延等参数有较大影响。通过调整光信道分配方法,采取配对措施即在为数据分组分配信道之前,尽量采取与前一时隙相同的信道进行分组的传输,从而减少调谐次数,使网络性能获得较大改善。In order to transmit packets through different optical channels upstream, a tunable transmitter is needed at ONU in the shared-based WDM PON. The cost of tunable transmitter is dependent on its tuning time, which affects the throughput and delay of the network deeply. It can reduce the tuning frequency,thus improve the network＇s throughput and delay by adjusting the optical channel allocation methods,which take the same channel in this slot as the previous one as far as possible.

关 键 词：WDM PON 带宽分配 调谐时间 时隙 配对 

分 类 号：TN919.11[电子电信—通信与信息系统]