Elastic optical ring with flexible spectrum ROADMs: An optical switching architecture for future data center networks
Elastic optical ring with flexible spectrum ROADMs: An optical switching architecture for future data center networks
复制标题
具有灵活频谱 ROADM 的弹性光环：面向未来数据中心网络的光交换架构
DOI：
10.1016/j.osn.2015.09.004
复制
发表时间：
2016
影响因子：
2.2
通讯作者：
Kuo Zhang
中科院分区：
文献类型：
--
作者：
Zitian Zhang;Weisheng Hu;Weiqiang Sun;Li Zhao;Kuo Zhang
数据中心网络（DCN）正面临着规模和带宽需求的显著增加，并且已经提出了各种DCN内光电路交换架构来处理机架间流量。随着数据中心的规模变得越来越大，基于环的架构已经受到了相当大的关注，因为环可以提供到分布在数据中心中相距很远的大量机架的连接。然而，由于特定的数据中心业务模式，现有的基于环形的DCN中的固定频谱分配方案将导致低频谱利用率，从而导致低系统吞吐量。本文提出在基于环的DCN内光交换中引入灵活的频谱分配，以提高频谱利用率。设计了一种具有灵活频谱可重构光分插复用器（FS-ROADM）的弹性环DCN内光路交换结构。在弹性环上采用灵活的频谱分配，频谱分配问题本质上是一个非常复杂而有趣的优化问题。对于一组给定的机架间的流量请求，我们开发了一个整数线性规划公式，以及一个启发式算法来解决灵活的频谱分配问题。我们研究如何机架间的流量模式可能会影响系统的性能，在固定和弹性环的情况下。对于弹性环，我们还分析和评估了频谱分配问题的计算复杂度。研究结果表明，弹性环在处理DCN中不均匀的架间业务模式时，可以显著提高系统吞吐量，但其频谱分配问题的计算复杂度略高于固定环。
Data center networks (DCN) are facing significant increase in both scale and bandwidth requirement, and various intra-DCN optical circuit switching architectures have been proposed to handle the inter-rack traffic. As the size of datacenters are becoming larger, ring based architectures have received considerable interests, because a ring can provide connectivity to a large number of racks that are distributed far apart in a datacenter. However, due to the specific data center traffic pattern, fixed spectrum allocation scheme in existing ring based DCNs will lead to low spectrum utilization and hence low system throughput. In this paper, we propose to introduce flexible spectrum allocation in to ring based intra-DCN optical switching, so that spectrum utilization can be improved. We design an elastic ring intra-DCN optical circuit switching architecture with flexible spectrum reconfigurable optical add-drop multiplexers (FS-ROADMs). Adopting flexible spectrum allocation in elastic ring, a spectrum allocation problem which is essentially a very complex yet interesting optimization problem arises. For a given set of inter-rack traffic requests, we develop an integer linear program formulation as well as a heuristic algorithm to solve the flexible spectrum allocation problem. We study how the inter-rack traffic pattern may affect the system performances in both fixed and elastic ring cases. For elastic ring, we also analyze and evaluate the computational complexity in solving the spectrum allocation problem. Our results demonstrate that, to handle uneven inter-rack traffic pattern in DCNs, elastic ring can remarkably improve system throughput, though its computational complexity of spectrum allocation problem is slightly higher than that of the fixed ring.
登录
查看更多内容
DOI：
10.1109/icc.1999.765614
发表时间：
1999-06
期刊：
1999 IEEE International Conference on Communications (Cat. No. 99CH36311)
影响因子：
--
作者：
L. Wuttisittikulkij;Sithichai Leelanunnukul;Sirichai Arreewanit;P. Prapinmongkolkarn
通讯作者：
L. Wuttisittikulkij;Sithichai Leelanunnukul;Sirichai Arreewanit;P. Prapinmongkolkarn
影响因子：
11.2
作者：
Jinno, Masahiko;Takara, Hidehiko;Matsuoka, Shinji
通讯作者：
Matsuoka, Shinji
DOI：
10.1007/978-3-642-30376-0_36
发表时间：
2010-10
期刊：
--
影响因子：
--
作者：
K. Christodoulopoulos
通讯作者：
K. Christodoulopoulos
DOI：
10.1109/lcomm.2014.2339322
发表时间：
2014-07
期刊：
IEEE Communications Letters
影响因子：
--
作者：
M. Fiorani;S. Aleksic;M. Casoni;L. Wosinska;Jiajia Chen
通讯作者：
M. Fiorani;S. Aleksic;M. Casoni;L. Wosinska;Jiajia Chen
DOI：
--
发表时间：
--
期刊：
--
影响因子：
--
作者：
通讯作者：
--