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Efficient singlecast / multicast method For active optical access network using PLZT high-speed optical switches

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6 Author(s)
Kunitaka Ashizawa ; Dept. of Information and Computer Science, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan ; Kazumasa Tokuhashi ; Daisuke Ishii ; Satoru Okamoto
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We propose a new efficient singlecast / multicast method for active optical access network using PLZT 10 nsec high-speed optical switches. The Active Optical Network, called ActiON, has been proposed using slot type switched optical network. Compared with Passive Optical Network (PON), ActiON can quadruplicate the number of subscribers (128 users) per OLT and double the maximum transmission distance (40 km) between OLT and ONUs. However, ActiON uses slot based switching method, so it is difficult to realize the multicast delivery. In this paper, we propose the efficient singlecast / multicast method for ActiON by using PLZT optical switch elements which are controlled as “distribution mode” like an optical splitter by applying mid-control voltage. In addition, a new efficient multicast slot allocation method is proposed and formulated as a linear programming problem. This formula develops the maximum number of users which is able to be connected by multicast and the minimum number of slots is used for multicast users.

Published in:

2010 International Conference on High Performance Switching and Routing

Date of Conference:

13-16 June 2010