{"created":"2023-07-25T10:25:34.342317+00:00","id":3960,"links":{},"metadata":{"_buckets":{"deposit":"49869a3e-7181-4a4e-a7af-2c1256f4081c"},"_deposit":{"created_by":4,"id":"3960","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"3960"},"status":"published"},"_oai":{"id":"oai:naist.repo.nii.ac.jp:00003960","sets":["34:35"]},"author_link":["7295","7296","215","7297"],"item_7_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"MANET-based Video Quality Improvement Method for One-segment Broadcasting Service","subitem_alternative_title_language":"en"}]},"item_7_biblio_info_9":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-02-15","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"838","bibliographicPageStart":"829","bibliographicVolumeNumber":"52","bibliographic_titles":[{"bibliographic_title":"情報処理学会論文誌","bibliographic_titleLang":"ja"}]}]},"item_7_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"本論文では，モバイルユーザが所持する無線通信可能なワンセグ携帯端末を対象に，ワンセグの受信品質が良い端末から悪い端末（難視聴端末）に対してマルチホップでビデオをストリーミング配信することで視聴品質を向上させる手法を提案する．まず，無線通信帯域や最大転送ホップ数などの制約を満たし，難視聴端末の救済数を最大化するビデオ中継パスの集合を求める問題を形式的に定義する．本問題はNP困難問題であり短時間に最適解を求めることは難しいため，各端末が近隣端末と定期的に交換した情報をもとにグリーディにビデオ中継パスを発見するアルゴリズムを提案する．また，本グリーディアルゴリズムを改良し，近隣端末に難視聴端末が要求するワンセグチャネルを代理受信させ中継することで救済数を増加させるアルゴリズムを提案する．3種類の典型的なフィールドモデルを用いた計算機シミュレーションの結果，提案手法は2ホップの中継により，難視聴エリアへの総滞在時間の60%以上において視聴品質を改善できた．","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"In this paper, we propose a method for improving 1seg video playback quality of mobile terminals with weak 1seg radio area (WRA terminals) by wireless multihop video streaming from terminals in strong 1seg radio area (SRA terminals). First, we formulate the problem to derive the set of video forwarding paths that maximize the number of relieved WRA terminals under the constraints on the wireless bandwidth and the maximum number of hops. Since this problem is NP-hard and it is difficult to derive the optimal solution in real-time, we propose a greedy algorithm that each WRA terminal finds a video forwarding path from a SRA terminal receiving the required 1seg channel based on the information periodically exchanged among neighboring terminals. In order to increase the number of relieved terminals, we introduce a technique called the cascade video forwarding where a WRA terminal (say A) asks a neighboring SRA terminal (say B) to receive the A's requesting 1seg channel and forward the video to A, and the terminal B asks another terminal to forward the video of the B's requesting 1seg channel. Through computer simulations, we confirmed that the proposed algorithm with 2-hop relief paths improved the video playback quality in more than 60% of the total WRA staying time for three typical field models.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_7_publisher_10":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"一般社団法人情報処理学会","subitem_publisher_language":"ja"}]},"item_7_rights_11":{"attribute_name":"出版者URL","attribute_value_mlt":[{"subitem_rights":"http://id.nii.ac.jp/1001/00072848/"}]},"item_7_rights_18":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"ここに掲載した著作物の利用に関する注意 本著作物の著作権は情報処理学会に帰属します。本著作物は著作権者である情報処理学会の許可のもとに掲載するものです。ご利用に当たっては「著作権法」ならびに「情報処理学会倫理綱領」に従うことをお願いいたします。Notice for the use of this material The copyright of this material is retained by the Information Processing Society of Japan (IPSJ). This material is published on this web site with the agreement of the author (s) and the IPSJ. Please be complied with Copyright Law of Japan and the Code of Ethics of the IPSJ if any users wish to reproduce, make derivative work, distribute or make available to the public any part or whole thereof.","subitem_rights_language":"ja"},{"subitem_rights":"Copyright c 2011 by the Information Processing Society of Japan","subitem_rights_language":"en"}]},"item_7_source_id_12":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1882-7764","subitem_source_identifier_type":"ISSN"}]},"item_7_source_id_14":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA1150957X","subitem_source_identifier_type":"NCID"}]},"item_7_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"布川, 雄大","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"7295","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"孫, 為華","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"7296","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"安本, 慶一","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"215","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"40273396","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=40273396"}]},{"creatorNames":[{"creatorName":"伊藤, 実","creatorNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"7297","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2023-03-02"}],"displaytype":"detail","filename":"IPSJ-JNL5202047.pdf","filesize":[{"value":"2.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"fulltext","objectType":"fulltext","url":"https://naist.repo.nii.ac.jp/record/3960/files/IPSJ-JNL5202047.pdf"},"version_id":"8fe56e79-8f69-427d-bb60-4b3bd72bf86d"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"MANETによるワンセグ難視聴端末救済手法","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"MANETによるワンセグ難視聴端末救済手法","subitem_title_language":"ja"}]},"item_type_id":"7","owner":"4","path":["35"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2016-11-24"},"publish_date":"2016-11-24","publish_status":"0","recid":"3960","relation_version_is_last":true,"title":["MANETによるワンセグ難視聴端末救済手法"],"weko_creator_id":"4","weko_shared_id":-1},"updated":"2023-11-16T08:38:06.376134+00:00"}