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WDM/TDMEPON传播时延的动态带宽分配算法

DOI: 10.13190/j.jbupt.2013.05.019, PP. 90-95

Keywords: 波分复用以太网无源光网络,动态带宽分配算法,离线调度,最短传播时延

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Abstract:

研究了多信道波分复用/时分复用混合以太网无源光网络(WDM/TDMEPON)系统的上行波长带宽分配算法,将该问题映射到调度理论中的并行多处理器模型进行分析,考虑了实际网络中传播时延的多样性对波分复用以太网无源光网络(WDMEPON)带宽分配的影响,提出了支持抢先机制的基于最短传播时延(SPD)/最长剩余处理时间(LRPT)混合调度策略的改进调度算法HSAⅠ和HSAⅡ。仿真分析结果显示,对于相同的传输数据,算法HSAⅠ较已有的LRPT优先、SPD优先和LOWSⅠ算法都能取得更小的完成时间,提高了信道资源的利用率;在长距离PON中,HASⅡ和HSAⅠ算法比现有的算法效果更显著。

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