{"id":1228,"date":"2011-06-16T06:41:50","date_gmt":"2011-06-15T21:41:50","guid":{"rendered":"http:\/\/www.yamanaka.ics.keio.ac.jp\/?p=1228"},"modified":"2017-09-25T17:49:38","modified_gmt":"2017-09-25T08:49:38","slug":"d1%e3%81%ae%e8%8a%a6%e6%b2%a2%e5%90%9b%e3%81%aeplzt%e5%85%89%e3%82%b9%e3%82%a4%e3%83%83%e3%83%81%e3%82%92%e7%94%a8%e3%81%84%e3%81%9f%e3%83%9e%e3%83%ab%e3%83%81%e3%82%ad%e3%83%a3%e3%82%b9%e3%83%88","status":"publish","type":"post","link":"https:\/\/www.yamanaka.ics.keio.ac.jp\/?p=1228","title":{"rendered":"D1\u306e\u82a6\u6ca2\u541b\u306ePLZT\u5149\u30b9\u30a4\u30c3\u30c1\u3092\u7528\u3044\u305f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u306b\u95a2\u3059\u308b\u8ad6\u6587\u304cCyber Journal\u306b\u63a1\u9332\u3055\u308c\u307e\u3057\u305f\u3002"},"content":{"rendered":"

\u5c71\u4e2d\u7814\u7a76\u5ba4D1\u306e\u82a6\u6ca2\u541b\u306ePLZT\u5149\u30b9\u30a4\u30c3\u30c1\u3092\u7528\u3044\u305f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u306b\u95a2\u3059\u308b\u8ad6\u6587\u304cCyber Journal<\/a>\u306b\u63a1\u9332\u3055\u308c\u307e\u3057\u305f\u3002
\n\u8ad6\u6587\u306b\u95a2\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n

Title: On-Demand Multicast Slot Allocation Scheme For Active Optical
\nAccess Network Using PLZT High-Speed Optical Switches
\nSpecial Issue: Journal of Selected Areas in Telecommunications (JSAT)
\nAuthor(s): K. Ashizawa, T. Sato, K. Tokuhashi, D. Ishii, S. Okamoto, N.
\nYamanaka, E. Oki<\/p>\n

Abstract:
\nThis paper proposes an on-demand multicast slot allocation scheme for an
\nactive optical access network that uses Mach-Zehnder-type high-speed
\noptical switches, which are achieved by the Plumbum Lanthanum Zirconate
\nTitanate (PLZT) switching technology. The Active Optical Network, called
\nActiON, is based on slot-based switching. Compared to the Passive
\nOptical Network (PON), ActiON quadruples the number of subscribers (128
\nusers) per optical line terminal (OLT) and doubles the maximum
\ntransmission distance (40 km) between OLT and optical network units
\n(ONUs). However, as ActiON uses slot-based switching, it needs a large
\nnumber of slots to deliver multicast contents to the requesting users.
\nThis greatly lowers network utilization rates. The proposed multicast
\nslot allocation scheme overcomes this problem to provide on-demand
\nmulticast services, while keeping the advantages of ActiON. Multicast
\ndelivery is realized by running the Mach-Zehnder-type high-speed optical
\nswitch elements in distribution mode, which forces the switch to behave
\nas an optical splitter. The proposed scheme iteratively solves the
\ninteger linear programming (ILP) problem to associate multicast users
\nwith slots. Numerical results show that the proposed scheme dramatically
\nreduces the required number of slots, compared to non-multicast ActiON
\nand provides comparable the performance of bandwidth efficiency to 10 G-
\nEPON, and the required computation time of the proposed scheme is less
\nthan 0.3 sec, which is feasible for on-demand services.
\n<\/p>\n\n

\u30c4\u30a4\u30fc\u30c8<\/a><\/div>","protected":false},"excerpt":{"rendered":"

\u5c71\u4e2d\u7814\u7a76\u5ba4D1\u306e\u82a6\u6ca2\u541b\u306ePLZT\u5149\u30b9\u30a4\u30c3\u30c1\u3092\u7528\u3044\u305f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u306b\u95a2\u3059\u308b\u8ad6\u6587\u304cCyber Journal\u306b\u63a1\u9332\u3055\u308c\u307e\u3057\u305f\u3002 \u8ad6\u6587\u306b\u95a2\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002 Title: On-Demand Multicast Slot … \u7d9a\u304d\u3092\u8aad\u3080 D1\u306e\u82a6\u6ca2\u541b\u306ePLZT\u5149\u30b9\u30a4\u30c3\u30c1\u3092\u7528\u3044\u305f\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u306b\u95a2\u3059\u308b\u8ad6\u6587\u304cCyber Journal\u306b\u63a1\u9332\u3055\u308c\u307e\u3057\u305f\u3002<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"two_page_speed":[],"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1228","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/posts\/1228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1228"}],"version-history":[{"count":2,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/posts\/1228\/revisions"}],"predecessor-version":[{"id":14200,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/posts\/1228\/revisions\/14200"}],"wp:attachment":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}