Low Propagation Delay Load-Balanced 4 $\,\times\,$4 Switch Fabric IC in 0.13-$\mu{\rm m}$ CMOS Technology
Low Propagation Delay Load-Balanced 4 $\,\times\,$4 Switch Fabric IC in 0.13-$\mu{\rm m}$ CMOS Technology
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DOI：
10.1109/tvlsi.2012.2212618
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发表时间：
2013-08
影响因子：
2.8
通讯作者：
C. Chiu;Y. Hsu;Wei-Chih Lai;Jen-Ming Wu;S. Hsu;Yang-Syu Lin;Fanta Chen;M. Kao;Yarsun Hsu
中科院分区：
文献类型：
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作者：
C. Chiu;Y. Hsu;Wei-Chih Lai;Jen-Ming Wu;S. Hsu;Yang-Syu Lin;Fanta Chen;M. Kao;Yarsun Hsu
针对基于反馈的交换系统，提出了一种负载平衡的Birkhoff-von Neumann (LB-BvN) 4 × 4交换结构集成电路。该芯片采用0.13 μm CMOS工艺，芯片面积为1.380 × 1.080 mm2。LB-BvN 4 × 4交换fabric IC的整体数据速率高达32gb /s (8gb /s/channel)，传输延迟仅为0.8 ns。强烈推荐LB-BvN交换机用于构建下一代太比特交换机。在基于反馈的交换系统中，由于交换模块的传输延迟过长，大大降低了系统的吞吐量。本文提出了一种直接应用于高速领域的可扩展lb - bvn4 × 4交换结构集成电路。通过观察N×N LB-BvN开关的确定性开关模式，我们提出了一种低复杂度的模式生成器，将PG复杂度从0 （N3）降低到O(1)。该技术将交换模块的传播延迟从30 ns减少到0.8 ns，并且与串行-反序列化接口相比，还提供了80%的面积节省和85%的功耗节省。提出的LB-BvN 4 × 4交换结构集成电路适用于基于反馈的交换系统，解决了吞吐量退化问题。
A load-balanced Birkhoff-von Neumann (LB-BvN) 4 × 4 switch fabric IC is proposed for feedback-based switch systems. This is fabricated in 0.13- μm CMOS technology and the chip area is 1.380 × 1.080 mm2. The overall data rate of the LB-BvN 4 × 4 switch fabric IC is up to 32 Gb/s (8 Gb/s/channel) with only 0.8 ns propagation delay. The LB-BvN switch is highly recommended for constructing the next-generation terabit switch. In a feedback-based switch system, the long propagation delay of the switch module reduces the system throughput significantly. In this paper, we present a scalable LB-BvN 4 × 4 switch fabric IC directly in the high-speed domain. By observing the deterministic switching pattern of the N×N LB-BvN switch, we present a low-complexity pattern generator that reduces the PG complexity from O(N3) to O(1). This technique reduces the propagation delay of the switch module from 30 to 0.8 ns, and also provides 80% area saving and 85% power saving compared to serializer-deserializer interfaces. The proposed LB-BvN 4 × 4 switch fabric IC is suitable for feedback-based switch systems to solve the throughput degradation problem.