{"updated":"2025-01-19T10:08:31.928219+00:00","metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00233300","sets":["1164:2836:11471:11524"]},"path":["11524"],"owner":"44499","recid":"233300","title":["TCPまたはMPTCP接続を並列利用する分割ダウンロードにおける分割サイズと性能の関係"],"pubdate":{"attribute_name":"公開日","attribute_value":"2024-03-11"},"_buckets":{"deposit":"13c61d01-ddfa-4a30-ba86-2a5e3369d1a5"},"_deposit":{"id":"233300","pid":{"type":"depid","value":"233300","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"TCPまたはMPTCP接続を並列利用する分割ダウンロードにおける分割サイズと性能の関係","author_link":["633410","633408","633411","633409"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"TCPまたはMPTCP接続を並列利用する分割ダウンロードにおける分割サイズと性能の関係"},{"subitem_title":"Relationship between Block Size and Performance for Segmented File Download Methods Using TCP/MPTCP","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"通信・ネットワーク・ファイル転送","subitem_subject_scheme":"Other"}]},"item_type_id":"4","publish_date":"2024-03-11","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"広島市立大学"},{"subitem_text_value":"広島市立大学"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_publisher":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing file","attribute_type":"file","attribute_value_mlt":[{"url":{"url":"https://ipsj.ixsq.nii.ac.jp/record/233300/files/IPSJ-DPS24198016.pdf","label":"IPSJ-DPS24198016.pdf"},"date":[{"dateType":"Available","dateValue":"2026-03-11"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-DPS24198016.pdf","filesize":[{"value":"3.3 MB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"660","billingrole":"5"},{"tax":["include_tax"],"price":"330","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"34"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"3af811a6-0b8a-4b4b-acd8-ea48d86504df","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2024 by the Information Processing Society of Japan"}]},"item_4_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"舟阪, 淳一"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"平岡, 憲明"}],"nameIdentifiers":[{}]}]},"item_4_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Junichi, Funasaka","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Noriaki, Hiraoka","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10116224","subitem_source_identifier_type":"NCID"}]},"item_4_textarea_12":{"attribute_name":"Notice","attribute_value_mlt":[{"subitem_textarea_value":"SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc."}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_18gh","resourcetype":"technical report"}]},"item_4_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2188-8906","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"WiFi と 4G/5G など複数の通信メディアを利用可能な端末が普及したことにより，これらを同時に利用したファイル転送が可能となっている．一方，帯域遅延積の大きなリンクにおいては TCP ウインドウサイズが十分でないことがあり，これを複数の TCP 接続で補う方式が提案されている．この技術は複数のパスにサブフローを確立する MPTCP (Multipath TCP) にも応用できる．我々はこれまで複数の経路において複数の TCP または MPTCP 接続を用いる分割ダウンロード方式を評価してきた．分割ダウンロード方式においては分割数を増やすと要求と応答の反復により遅延の影響を大きく受けるとともに，TCP ウインドウサイズが十分に大きくならない可能性がある．一方，分割数を減らすと性能の低い経路を用いてダウンロードするデータが大きすぎて，ダウンロード速度が下がるリスクがある．本発表では分割サイズと性能の関係について考察した結果を報告する．","subitem_description_type":"Other"}]},"item_4_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"Since terminals with multiple communication media such as WiFi and 4G/5G are emerging, we can transfer files using these media concurrently. When the TCP window size is not enough large to fully utilize the bandwidth of a network link due to high delay or high packet loss rate, some methods have been proposed to use multiple TCP connections for performance improvement. The usage of multiple TCP connections can be applied to Multipath TCP (MPTCP), which establishes a subflow on each of multiple paths. We have proposed and evaluated the segmented file download methods which use multiple TCP or MPTCP connections on multiple paths. In the segmented download process, the delay caused by repeated requests and replies as well as insufficient size of TCP window affect the performance when increasing the number of divisions. On the other hand, the data assigned to a slow path may require a long time when decreasing the number of divisions. In this presentation, we discuss the results of considerations on the relationship between the block size and the performance.","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"6","bibliographic_titles":[{"bibliographic_title":"研究報告マルチメディア通信と分散処理（DPS）"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2024-03-11","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"16","bibliographicVolumeNumber":"2024-DPS-198"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"created":"2025-01-19T01:34:39.577345+00:00","id":233300,"links":{}}