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首页> 外文期刊>Optical Engineering >Two-stage shared fiber delay line optical packet switch for contention resolution in optical packet-switching network
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Two-stage shared fiber delay line optical packet switch for contention resolution in optical packet-switching network

机译：两级共享光纤延迟线光分组交换机，用于光分组交换网络中的竞争解决

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摘要

Packet contention is a major issue in an optical packet-switching network. We focus on contention resolution using fiber delay lines (FDLs), which are used to buffer contended packets in order to forward these packets to the desired output port to some future time slots. Most of the existing optical buffering schemes are output based, which require a huge number of FDLs as well as a larger switch size and incur extra implementation cost. A shared FDL buffering approach is considered to reduce implementation cost. This paper proposes a two-stage shared FDL optical packet switch to resolve contention, where FDLs are implemented in two stages using extremely simple auxiliary switch. The performance of the proposed switch architecture is evaluated through simulation under trivial and bursty traffic condition, in terms of packet loss rate and average delay. Other performance parameters, such as cross-talk, insertion loss, switch time, etc., are also discussed. Simulation result shows that, the packet loss rate of the proposed architecture under heavy traffic load (ρ = 0.9) is between ∼10−3 and ∼10−4 for a 32×32 switch using 64 FDLs, and zero packet loss rate achievable with ρ < 0.8.
机译：分组争用是光分组交换网络中的主要问题。我们将重点放在使用光纤延迟线（FDL）的竞争解决上，该延迟线用于缓冲争用的数据包，以便将这些数据包转发到所需的输出端口到某些将来的时隙。现有的大多数光学缓冲方案都是基于输出的，这需要大量的FDL和较大的开关尺寸，并且会产生额外的实施成本。考虑使用共享的FDL缓冲方法来降低实现成本。本文提出了一种两阶段共享的FDL光分组交换机来解决竞争问题，其中使用非常简单的辅助交换机分两阶段实施FDL。通过仿真，在丢包率和平均延迟方面，通过在琐碎和突发流量条件下进行仿真，可以评估所提出的交换机体系结构的性能。还讨论了其他性能参数，例如串扰，插入损耗，切换时间等。仿真结果表明，对于使用64个FDL的32×32交换机，在高流量负载（ρ= 0.9）的情况下，该架构的丢包率在〜10-3和〜10-4之间。 ρ＜0.8。

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