標題: | A strictly nonblocking network based on nonblocking 4 x 4 optical switches |
作者: | Lee, Chi-Ping Chang, Chien-Ping Deng, Jiun-Shiou Li, Min-Hao Lu, Ming-Feng Huang, Yang-Tung Kuei, Ping-Yu 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
關鍵字: | Optical multistage network;Polarization selective element;Strictly nonblocking;System insertion loss;Routing algorithm |
公開日期: | 1-一月-2012 |
摘要: | Recently, the demand for communication has been growing rapidly. Hence, optical multistage network technologies are more appreciated nowadays. A double-layer network is a strictly nonblocking network, and it has the lowest system insertion loss of non-dilated networks. A Benes network is a rearrangeably nonblocking network, and it has the same system insertion loss as a double-layer network. We have proposed the use of modified polarization selection elements (PSEs). The system insertion loss, number of drivers, and number of required components of a double-layer network could be reduced if it is constructed with modified PSEs. A nonblocking 4 x 4 optical switch with two stages of polarization selective elements has been presented in our previous study. Based on this nonblocking 4 x 4 optical switch, we propose a strictly nonblocking network structure which features even lower system insertion loss than those of a double-layer network and a Benes network. The signal-to-noise ratio of the proposed network structure is a constant, and is higher than the constraint, although it is lower than that of the double-layer network. The number of major components of the proposed network is less than that of a double-layer network and larger than that of a Benes network, since a Benes network is rearrangeably nonblocking. We also offer a routing algorithm for the new proposed network; the time complexity of the routing algorithm is O(1). (C) 2011 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.osn.2011.02.001 http://hdl.handle.net/11536/14889 |
ISSN: | 1573-4277 |
DOI: | 10.1016/j.osn.2011.02.001 |
期刊: | OPTICAL SWITCHING AND NETWORKING |
Volume: | 9 |
Issue: | 1 |
起始頁: | 1 |
結束頁: | 12 |
顯示於類別: | 期刊論文 |