Search Results 1-20 of 216

  • A Packet Loss Reduction Mechanism at Frequent Handovers in Infrared-based Train Networks  [in Japanese]

    TERADA Masanori , KANEKO Kunitake , TERAOKA Fumio

    We have been developing a train network system using infrared transceivers, IR system. In the system, handovers occur frequently and cause bursty packet loss. This paper proposes a packet loss reducti …

    IEICE technical report. MoNA, Mobile network and applications 113(495), 51-56, 2014-03-07

  • A Packet Loss Reduction Mechanism at Frequent Handovers in Infrared-based Train Networks  [in Japanese]

    Masanori Terada , Kunitake Kaneko , Fumio Teraoka

    We have been developing a train network system using infrared transceivers, IR system. In the system, handovers occur frequently and cause bursty packet loss. This paper proposes a packet loss reducti …

    IPSJ SIG technical reports 2014-MBL-70(50), 1-6, 2014-03-07

    IPSJ

  • Analysis of User's Consciousness for Smart-phone Services  [in Japanese]

    YOSHIMURA Noriko , MASUDA Masataka

    To ensure that smart-phone services meet the high expectations of end users, the service development and improvement based on an understanding of various users' consciousness are important. We surveye …

    Technical report of IEICE. CQ 113(208), 119-122, 2013-09-12

  • A Consideration on Making Internet Environment in Shinkansen Faster  [in Japanese]

    TERADA MASANORI , TERAOKA FUMIO

    Currently, Tokaido-Shinkansen provides a stable Internet environment in the train using leaky coaxial cable (LCX). We have been developing an infrared (IR) communication system with a fast handover me …

    IEICE technical report 112(44), 51-58, 2012-05-14

    References (9)

  • Scaling-Up Network Servers in N:1 Redundant Systems by Using I/O Virtualization  [in Japanese]

    SUZUKI Jun , MIYAGAKI Takayuki , KOMATSUBARA Madoka , OHMORI Kazuteru , BABA Hiroshi , EGASHIRA Kazuhiro , SHIMAMOTO Hiroshi , TACHIBANA Masaki , AKIZUKI Katsuyuki , TSUCHIYA Satoshi , HIDAKA Yoichi , HIGUCHI Junichi , YOSHIKAWA Takashi

    In a redundant network server system, data in the memory of a primary server are copied to that of a backup server to rapidly switch over a service when a hardware failure occurs. Configuring N:1 redu …

    IEICE technical report 111(408), 71-76, 2012-01-26

  • Scaling-Up Network Servers in N:1 Redundant Systems by Using I/O Virtualization  [in Japanese]

    SUZUKI Jun , MIYAGAKI Takayuki , KOMATSUBARA Madoka , OHMORI Kazuteru , BABA Hiroshi , EGASHIRA Kazuhiro , SHIMAMOTO Hiroshi , TACHIBANA Masaki , AKIZUKI Katsuyuki , TSUCHIYA Satoshi , HIDAKA Yoichi , HIGUCHI Junichi , YOSHIKAWA Takashi

    電子情報通信学会技術研究報告. NS, ネットワークシステム 111(408), 71-76, 2012-01-19

    References (10)

  • A Seamless TCP Connection over High-speed Mobile Communication System Based on IEEE 802.11g  [in Japanese]

    山田 和弘 , 清水 和人 , 川原 圭博 [他] , 浅見 徹 , 相田 仁

    我々はWi-Fi(IEEE 802.11g)を利用した高速移動通信システムを提案している.Yamadaら(2010)では,提案手法により270km/hの高速移動時中に最大25Mbpsのスループットが得られることを示した.一方で,頻繁に発生するレイヤ2ハンドオーバ(L2HO)においてトラヒックフローが不連続となることも指摘した.本論文では最初に,L2HO時におけるTCPパフォーマンスの解析結果を示し …

    情報処理学会論文誌 53(1), 251-273, 2012-01-15

    IPSJ

  • インタビュー "通信電池"でモバイルを使いやすく SIMロックフリーだから広がりが出る  [in Japanese]

    三田 聖二

    … スマートフォンが注目を集める中、安価な端末やモバイルIPフォンなど新たなサービスを次々に投入する日本通信。 …

    Nikkei communications (567), 38-40, 2011-04-01

    Nikkei BP

  • All-SIP Mobility for Mobile Communications  [in Japanese]

    MIYAJIMA Haruya , ZHANG Liang , HAYASHI Hideki , FUJII Teruya

    近年,ユーザを取り巻くモバイル通信環境は,3Gセルラ,無線LAN,WiMAXなどの様々な広帯域無線アクセス網が展開されており,更に近い将来には3.9G,4Gセルラなどの展開も見込まれるなど,多様化が急速に進んでいる.このような多様なアクセス網が混在する通信環境では,異なるネットワーク間を自在に移動できるシームレスモビリティの提供が重要な課題となる.その解決法の一つとして,SIPプロトコルの簡易なモ …

    The Journal of the Institute of Electronics, Information and Communication Engineers 94(1), 47-51, 2011-01-01

    References (8)

  • Dynamic Packet Control for Improving Packet Delays  [in Japanese]

    NAKAMURA Shigeki , KAMIOKA Eiji

    In these days, smartphones, such as iPhone, android phone, and windows phone, have spread all over the world, and thus mobile IP telephone services using WLAN as typified by Skype, are quite popular a …

    IEICE technical report 110(199), 7-12, 2010-09-02

    References (4)

  • L-013 Flow Behavior based Traffic Classification in Mobile IP Network  [in Japanese]

    Satoh Akihiro , Osada Toshiaki , Kitagata Gen , Abe Toru , Shiratori Norio , Kinoshita Tetsuo

    情報科学技術フォーラム講演論文集 8(4), 155-156, 2009-08-20

  • Performance Analysis of Mobility Protocols for IMS Network  [in Japanese]

    CHIBA Tsunehiko , KOMORITA Satoshi , YOKOTA Hidetoshi

    … SIPを用いた呼制御システムとして注目されているIMSでは,アクセスネットワーク間のモビリティを確保するためにSIPベースモビリティ,モバイルIP,プロキシモバイルIPなどの移動管理プロトコルが用いられる.しかしながら,移動管理プロトコルをIMSに適用する場合,ハンドオフ時間の短縮だけでなくSIP制御メッセージに用いるIPv6アドレスの秘匿,アプリケーションのメディアデータの転送遅延の軽減,無線 …

    The IEICE transactions on communications B 92(4), 633-642, 2009-04-01

    References (21)

  • B-7-60 Researches on High Speed Mobile Communication System by Millimeter Wave (2) : An Implementation of Mobile IP Registration Function on Ad-Hoc Network Routing System  [in Japanese]

    MATSUKAWA Koichi , YAGI Akiyoshi , HORI Takahiko , MATSUDA Tetsushi , SHIROKURA Yoshihiko

    Proceedings of the IEICE General Conference 2009年_通信(2), 204, 2009-03-04

  • B-15-7 A speech mixing method for coexistence of narrow and wide band speech and its quality evaluation  [in Japanese]

    Ito Hironori , Ozawa Kazunori

    Proceedings of the IEICE General Conference 2009年_通信(1), 593, 2009-03-04

  • Performance Analysis for Smooth Handoff in Networks Simply Implementing Mobile IP

    SATAKE Takashi

    In this paper, we present the performance analysis for smooth handoff in networks simply implementing Mobile IP, which is designated to one of the handoff methods in 4G networks. We define some traffi …

    IEICE technical report 108(290), 1-4, 2008-11-06

    References (6)

  • Performance Analysis of Mobility Protocols for IMS Network  [in Japanese]

    CHIBA Tsunehiko , KOMORITA Satoshi , YOKOTA Hidetoshi

    In recent years, IMS is becoming important as the key to all-IP network. While IMS provides call control function based on SIP protocol, seamless mobility for real-time applications should be supporte …

    IEICE technical report 108(136), 83-88, 2008-07-10

    References (17) Cited by (1)

  • Technical Trends in Next Generation Mobile Networks  [in Japanese]

    YOKOTA Hidetoshi

    This paper illustrates recent and emerging trends in the technologies that are expected for the future mobile networks. In order to accommodate the next generation radio technologies, so called "3.9G" …

    IEICE technical report 108(136), 23-28, 2008-07-10

  • Communication Node Identifying Architecture : Basic Concepts

    KAFLE Ved P. , NAKAUCHI Kiyohide , INOUE Masugi

    We have been pursuing research on new generation networks, under AKARI project, that will be realized around 2020. Besides having many advanced features, the envisioned networks would overcome the lim …

    IEICE technical report 107(98), 55-60, 2007-06-14

    References (20)

  • Routing-Aware Handover for IP Multicasting based on Forwarding Router Discovery  [in Japanese]

    ARASAKI Ken-ichiro , TAKAHASHI Takeshi , ASATANI Koichi , TOMINAGA Hideyoshi

    To support multicast over Mobile IP networks, the IETF proposed two schemes, namely MIP-BT and MIP-RS. MIP-BT provides mobility by establishing bi-directional tunnel. Although it does not require mult …

    IEICE technical report 106(498), 41-46, 2007-01-18

    References (9) Cited by (1)

  • The Mail Roaming System over Multilink onboard Trains  [in Japanese]

    YAMADA Kazuhiro , IMAI Seiji , TANAKA Yuichi , ASANO Kinya

    It is difficult to deploy a broadband communication system onto the entire track of an intercity high speed rail from technical and financial aspects. One of the solutions to this issue is a combined …

    IEICE technical report 106(478), 87-92, 2007-01-17

    References (16) Cited by (1)

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