A construction of 1-to-2 shared optical buffer queue with switched delay lines
A construction of 1-to-2 shared optical buffer queue with switched delay lines
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DOI：
10.1109/tcomm.2009.12.080309
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发表时间：
2009-12
影响因子：
8.3
通讯作者：
Xiaoliang Wang;Xiaohong Jiang;A. Pattavina;S. Horiguchi
中科院分区：
文献类型：
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作者：
Xiaoliang Wang;Xiaohong Jiang;A. Pattavina;S. Horiguchi
光缓冲是解决光网络争用的基础。目前在这方面的研究主要集中在利用交换光纤延迟线（SDL）仿真专用输入/输出缓冲队列。值得注意的是，共享缓冲队列（其中一个公共缓冲池由交换机的所有输入/输出端口共享）有可能显著降低总体缓冲容量需求。然而，据我们所知，目前还没有关于使用wsdl精确模拟共享光学缓冲队列的相关工作。本文重点研究了基于光反馈SDL结构的FIFO （first In first out）共享光缓冲队列的设计。所考虑的结构包括一个（M + 2） x （M + 2）交换织物和M条光纤延迟线FDL1，…FDLM，其中FDLi将交换fabric的第i个输出与其第i个输入连接起来。通过设置FDL1的长度为min(M + 1 - i, i), i = 1，…， M，这样的结构实际上可以作为1对2的共享缓冲队列。然后我们将这个模拟扩展到更一般的n到2的情况。
Optical buffering is fundamental to contention resolution in optical networks. The current works on this line mainly focus on the emulation of dedicated input/output buffer queue by using switched fiber delay lines (SDL). It is notable that the shared buffer queue, where a common buffer pool is shared by all the input/output ports of a switch, has the potential to significantly reduce the overall buffer capacity requirement. As far as we know, however, no related work is available yet on the exact emulation of a shared optical buffer queue with SDLs. In this paper, we focus on the design of first in first out (FIFO) shared optical buffer queue based on the optical feedback SDL construction. The construction considered consists of an (M + 2) x (M + 2) switch fabric and M fiber delay lines FDL1, . . ., FDLM, where FDLi connects the ith output of the switch fabric with its ith input. We show that by setting the length of FDL1 as min(M + 1 - i, i), i = 1, . . . , M, such a construction can actually work as an 1-to-2 shared buffer queue. We then extend this emulation to the more general N-to-2 case.