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DESIGN AND IMPLEMENTATION OF AN ULTRA FAST PIPELINED WAVELENGTH SCHEDULER FOR OPTICAL BURST SWITCHING

机译：一种用于光学突发切换的超快速流水线波长调度器的设计与实现

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Optical Burst Switching (OBS) is an emerging technology that allows variable size data bursts to be transported directly over DWDM links. In OBS, before the transmission of data bursts, a Burst Header Cell (BHC) is transmitted through an out-of-band control plane, setting up and tearing down optical wavelength paths. Data bursts can remain in the optical data plane and pass through the network transparently. This paper is the first one to study the negative impact of control path overload in the OBS networks. Based on the study, the control path overload can be the performance bottleneck in the OBS networks, especially for systems with large channel counts. In order to meet the stringent performance requirements, we have designed and implemented an ultra fast pipelined wavelength scheduler that is able to process a burst request every two clock cycles, regardless of the number of WDM channels per link. The design has been implemented in Verilog HDL. Circuit level simulation results confirm the correctness of the design. The logic needed for the scheduler is simple enough so that a 500 MHz clock can be achieved in 130 nm process, allowing the scheduler to process a burst request every 4 ns.
机译：光突发交换（OBS）是一项新兴技术，它允许直接通过DWDM链路传输可变大小的数据突发。在OBS中，在传输数据突发之前，突发头单元（BHC）通过带外控制平面进行传输，从而建立和拆除光波长路径。数据突发可以保留在光学数据平面中，并透明地通过网络。本文是研究OBS网络中控制路径过载的负面影响的第一篇论文。根据研究，控制路径过载可能是OBS网络中的性能瓶颈，特别是对于具有大量通道数的系统而言。为了满足严格的性能要求，我们设计并实现了一种超快速流水线波长调度器，该调度器能够每两个时钟周期处理一个突发请求，而与每条链路的WDM通道数无关。该设计已在Verilog HDL中实现。电路级仿真结果证实了设计的正确性。调度程序所需的逻辑非常简单，因此可以在130 nm工艺中获得500 MHz时钟，从而允许调度程序每4 ns处理一次突发请求。

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