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-Jan-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
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