{"updated":"2025-01-21T20:25:36.733931+00:00","metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00078708","sets":["6164:6165:6244:6609"]},"path":["6609"],"owner":"10","recid":"78708","title":["NAT越えを考慮したベストエフォート型TCPの実装と評価"],"pubdate":{"attribute_name":"公開日","attribute_value":"2011-11-24"},"_buckets":{"deposit":"f771d488-ca8e-4d14-ae1b-f9c1660cf795"},"_deposit":{"id":"78708","pid":{"type":"depid","value":"78708","revision_id":0},"owners":[10],"status":"published","created_by":10},"item_title":"NAT越えを考慮したベストエフォート型TCPの実装と評価","author_link":["0","0"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"NAT越えを考慮したベストエフォート型TCPの実装と評価"},{"subitem_title":"Implementation and Evaluation of Best-effort TCP for overcomming NAT","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"情報基盤を支えるネットワーク技術","subitem_subject_scheme":"Other"}]},"item_type_id":"18","publish_date":"2011-11-24","item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_18_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"京都大学大学院情報学研究科"},{"subitem_text_value":"京都工芸繊維大学情報科学センター"}]},"item_18_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Graduate School of Informatics, Kyoto University","subitem_text_language":"en"},{"subitem_text_value":"Center for Information Science, Kyoto Institute of Technology","subitem_text_language":"en"}]},"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/78708/files/IPSJ-IOTS2011003.pdf"},"date":[{"dateType":"Available","dateValue":"2012-05-24"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-IOTS2011003.pdf","filesize":[{"value":"647.1 kB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"660","billingrole":"5"},{"tax":["include_tax"],"price":"330","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"43"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"3e59bd4f-f6e1-4cd8-81d7-3a4727ef1994","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2011 by the Information Processing Society of Japan"}]},"item_18_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"中野, 宣昭"},{"creatorName":"桝田, 秀夫"}],"nameIdentifiers":[{}]}]},"item_18_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Noriaki, Nakano","creatorNameLang":"en"},{"creatorName":"Hideo, Masuda","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_5794","resourcetype":"conference paper"}]},"item_18_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"近年，インターネットの普及により，拠点間接続の需要が高まってきている．拠点間接続を行う仕組みの中でも，従来の専用線を使う方法に比べ，安価に拠点間接続を実現できる VPN (Virtual Private Network) が注目されている．また，IPv4 (Internet Protocol version 4) のグローバルアドレスの在庫がほぼ無くなり，新規割り当てが困難になっていることもあり，様々な環境で NAT (Network Address Traslation) や，NAPT (Network Address Port Translation) が利用されている．しかしながら，NAT/NAPT には，TCP (Transmission Control Protocl)/UDP (User Datagram Protocol) を利用したホスト間通信を行う際に，ホスト間に NAT 機器があるとプライベート IP アドレスを持つホストとの間でパケットの書き換えが生じるため，直接通信を行うことを前提としたプロトコルでは NAT 機器を越えることが難しいという問題がある．さらに，TCP 通信を利用した VPN トンネル上で TCP 通信を行うと，再送制御などが二重に行われる TCP over TCP と呼ばれる通信状態になり通信性能が悪化してしまう問題が知られている．本稿では，特に VPN トンネルに適用することを考慮し，NAT 越えを想定したコネクション指向型で，かつ，データやりとりはベストエフォート型であるベストエフォート型 TCP を提案し，そのプロトコルスタックの実装を行う．また，その通信性能を測定した結果，特にバースト的なパケット損失を起こす伝送路上で定常状態に戻るまでの復帰時間が，およそ 60% 程度まで改善できた．","subitem_description_type":"Other"}]},"item_18_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"In the few years, demand for connection between remote sites has been growing. In the structure of connection between remote sites, VPN is payed attention becase it can construct private network cheaper than traditional leased line. Also, many small networks use NAT/NAPT so that IPv4 address exhaustion is unavoidable issue. But, the NAT/NAPT problem arises when two peers behind distinct NAT try to communicate with TCP/UDP. Moreover, VPN connection over TCP has ”TCP over TCP” problem. It causes serious performance degradation. In this paper, we provide the best-effort TCP for overcoming NAT in particular to consider use of VPN tunnel and develop that protocol stacks. As a result of performance measurement, in particular burst packet loss environment, the steady-state recovery time improves almost 60% than original TCP.","subitem_description_type":"Other"}]},"item_18_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"22","bibliographic_titles":[{"bibliographic_title":"インターネットと運用技術シンポジウム2011論文集"}],"bibliographicPageStart":"16","bibliographicIssueDates":{"bibliographicIssueDate":"2011-11-24","bibliographicIssueDateType":"Issued"},"bibliographicVolumeNumber":"2011"}]},"relation_version_is_last":true,"weko_creator_id":"10"},"created":"2025-01-18T23:33:52.438561+00:00","id":78708,"links":{}}