A petabit photonic packet switch (P/sup 3/S)
A petabit photonic packet switch (P/sup 3/S)
复制标题
拍比特光子分组交换机 (P/sup 3/S)
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Z. Jing
中科院分区：
文献类型：
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作者：
H. J. Chao;K. Deng;Z. Jing
本文提出了一种新的拍比特光子分组交换机（P/sup 3/S）架构，该架构在尺寸和容量上都具有高度可扩展性，同时保持较高的系统性能。使用包括空间、时间、波长和子载波域的新的多维光子复用方案，我们提出了一种基于三级 Clos 网络的光子交换结构，以提供具有纳秒重构速度的可扩展的大维光子互连。数据包缓冲在输入和输出端口控制器处以电子方式实现，允许中央光子交换结构传输高速光信号，而无需电光转换。光时分复用 (OTDM) 技术进一步将端口速度扩展到电子速度之外，最高可达 160 Gbits/s，从而最大限度地减少光纤连接。为了解决输出争用，我们提出了一种新的仲裁方案，称为基于帧的穷举匹配（FEM），使用扩展帧来聚合来自不同传入线路的单元。扩展帧放宽了 160 Gbit/s 端口速度下严格的仲裁时间限制。基于所提出的架构中的FEM方案，可以实现总容量为1.024 petabit/s的6400/spl次/6400交换机，并且在各种流量条件下吞吐量接近100%。
This paper presents a new petabit photonic packet switch (P/sup 3/S) architecture that is highly scalable both in dimension and capacity while maintaining high system performances. Using a new multidimensional photonic multiplexing scheme that includes space, time, wavelength, and subcarrier domains, we propose a photonic switch fabric based on a 3-stage Clos network to provide scalable large-dimension photonic interconnections with nanosecond reconfiguration speed. Packet buffering is implemented electronically at the input and output port controllers, allowing the central photonic switch fabric to transport high-speed optical signals without electrical-to-optical conversion. Optical time division multiplexing (OTDM) technology further scales port speed beyond electronic speed up to 160 Gbits/s to minimize the fiber connections. To solve output contention, we propose a new arbitration scheme, called frame-based exhaustive matching (FEM), using extended frames to aggregate cells from different incoming lines. The extended frame relaxes the stringent arbitration time constraint at a 160 Gbit/s port speed. Based on the FEM scheme in the proposed architecture, a 6400 /spl times/ 6400 switch with a total capacity of 1.024 petabit/s can be achieved with throughput close to 100% under various traffic conditions.