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| Presentation | 2016-03-11 11:15 Construction of WOM codes for multilevel flash memories based of integer programming Yoju Fujino, Tadashi Wadayama (NIT)  IT2015-129 ISEC2015-88 WBS2015-112 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, we proposed a construction of non-binary WOM (Write-Once-Memory) codes for multilevel ($q$-level) flash memories based on integer programming. The WOM codes discussed in this paper are fixed rate $(n, q, M, t^*)$-WOM codes where messages in an alphabet of size $M$ can be written in $n$-cells at least $t^*$-times. The proposed construction has the two features. First, it possesses a systematic method to determine the writable areas needed to construct the codes. Second, the proposed construction includes a labeling method for cell states by using integer programming. The novel WOM codes with $n=2$ and $M= 8$ constructed by the proposed construction achieve the number of writes $t^*$ that meet the known upper bound in the range $q in [4,8]$. They are thus optimal in terms of the number of writes $t^*$. One of advantages of the proposed construction is flexibility; it can be used for high dimensional cases. For example, the new $(n = 3, q = 7, M = 7, t^* = 8)$-WOM code provides larger $t^*$ than that of the known $(3, 7, 7 ,7)$-WOM code. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | WOM-code / flash memories / integer programming / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 500, IT2015-129, pp. 169-174, March 2016. | |
| Paper # | IT2015-129 | |
| Date of Issue | 2016-03-03 (IT, ISEC, WBS) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | IT2015-129 ISEC2015-88 WBS2015-112 |
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| Conference Information | |
| Committee | IT ISEC WBS |
| Conference Date | 2016-03-10 - 2016-03-11 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The University of Electro-Communications |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | joint meeting of IT, ISEC, and WBS |
| Paper Information | |
| Registration To | IT |
| Conference Code | 2016-03-IT-ISEC-WBS |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Construction of WOM codes for multilevel flash memories based of integer programming |
| Sub Title (in English) | |
| Keyword(1) | WOM-code |
| Keyword(2) | flash memories |
| Keyword(3) | integer programming |
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| 1st Author's Name | Yoju Fujino |
| 1st Author's Affiliation | Nagoya Institute of Technology (NIT) |
| 2nd Author's Name | Tadashi Wadayama |
| 2nd Author's Affiliation | Nagoya Institute of Technology (NIT) |
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| Speaker | Author-1 |
| Date Time | 2016-03-11 11:15:00 |
| Presentation Time | 25 minutes |
| Registration for | IT |
| Paper # | IT2015-129, ISEC2015-88, WBS2015-112 |
| Volume (vol) | vol.115 |
| Number (no) | no.500(IT), no.501(ISEC), no.502(WBS) |
| Page | pp.169-174 |
| #Pages | 6 |
| Date of Issue | 2016-03-03 (IT, ISEC, WBS) |
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